docs: Slack-style per-thread notifications (P4-1) across catalog/README/TODO/BUGS

LOTUS_FEATURES: Notifications subsection under Threads (participating default,
per-thread All/Mentions/Mute, badge behavior). README: thread-notifications
bullet. LOTUS_TODO: P4-1 → [~] + 6-step live-QA checklist + caveats.
LOTUS_BUGS: verification row.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

HANDOFF_ELEMENT_CALL_FORK.md

@@ -548,8 +548,19 @@ roster capped. Only `https`/`blob` URLs accepted for inject/decoration assets.
 
 ### 12.1 cinny host integration checklist (REQUIRED to light these up)
 
-The EC side is additive and dormant until cinny opts in. Host work needed (in
+> ✅ **STATUS (2026-06): COMPLETE.** All items below are shipped. call_state,
-`src/app/plugins/call/CallEmbed.ts` unless noted):
+> focus_participant, decorations, and transparent background are active; the
+> in-source denoise cutover is done (flag `lotusDenoiseSource=1`, **all four**
+> models in-source); and the two formerly-dormant capabilities now have cinny
+> UI — **soundboard** (`io.lotus.inject_audio`, P5-15) and **quality controls +
+> room permissions** (`io.lotus.set_quality` + `io.lotus.room_quality`, P5-31,
+> with server-side enforcement in `LotusGuild/matrix`). See `LOTUS_FEATURES.md`
+> → "Element Call — Self-Built Fork". The checklist is kept below as the record
+> of what was wired. (One open denoise item tracked separately: the "Series
+> Suppression" native-NS toggle is not wired to the real call path.)
+
+The EC side is additive and dormant until cinny opts in. Host work (in
+`src/app/plugins/call/CallEmbed.ts` unless noted) — **done**:
 
 > ⚠️ **CRITICAL TIMING (protocol audit F1):** only send `io.lotus.*` **toWidget**
 > actions (#3 focus, #6 decorations, #7 quality, audio-inject) **after** the call
@@ -559,16 +570,16 @@ The EC side is additive and dormant until cinny opts in. Host work needed (in
 > leaves the host's `transport.send` pending until the **10s timeout**. Queue and
 > flush on join, or no-op before join.
 >
-> Also: **F3** — the fork implements only `rnnoise`/`speex`; cinny's `dtln`/
+> Also: **F3 (RESOLVED)** — all four models (`rnnoise`/`speex`/`dtln`/
-> `deepfilternet` selections silently fall back to rnnoise (now logged). Restrict
+> `deepfilternet`) are now implemented in-source in `lotusDenoiseProcessor.ts`;
-> the embedded-call model picker to rnnoise/speex, or implement the others in
+> the picker offers all four. **F4** — cinny no longer forwards a native-NS flag
-> `lotusDenoiseProcessor.ts`. **F4** — cinny sends `lotusNativeNS`, which the
+> in the `ml` branch (the "Series Suppression" toggle is currently a no-op in
-> fork ignores; drop it or wire it in. **F7** — no widget _capability_ changes
+> real calls — open item). **F7** — no widget _capability_ changes needed;
-> needed; custom actions bypass capability checks.
+> custom actions bypass capability checks.
 
 1. **Set the URL flags** on the widget iframe params (the `URLSearchParams` in
    `CallEmbed`): `lotusCallState=1`, `lotusTransparent=1`/`lotusTheme=1`,
-   `lotusAudioInject=1` as desired. (Denoise already sets `lotusDenoise=ml` etc.)
+   `lotusAudioInject=1` as desired. (Denoise sets `lotusDenoiseSource=1` + `lotusModel`/`lotusGate`/`lotusGateThreshold` in the `ml` tier.)
 2. **Ack `io.lotus.call_state`**: add `listenAction('io.lotus.call_state', …)` —
    without a reply the fork's sends time out every 250ms. Feed the payload into
    `useCallSpeakers` and RETIRE its `contentDocument` DOM scrape.

LOTUS_BUGS.md

@@ -32,6 +32,11 @@ Implemented and gate-green; confirm each per `LOTUS_TESTING.md`, then delete the
 | N105 | Notification clicks work after tab close (SW `notificationclick` + `showNotification`) | `sw.ts`, `utils/dom.ts`, `ClientNonUIFeatures.tsx`   | get a msg notif, close the tab, click it → app focuses/opens + routes to the room |
 | Gal  | MediaGallery lazy-decrypt (true virtualization deferred)                               | `room/MediaGallery.tsx`                              | H1                                                                                |
 | a11y | aria-labels: edit-history / reaction / thread / reply                                  | `message/*` (`FallbackContent`, `Reaction`, `Reply`) | I                                                                                 |
+| P3-8 | Thread Panel (side drawer, chips, threaded receipts, thread composer)                 | `features/room/thread/*`, `RoomTimeline/RoomInput`  | 6-step checklist in LOTUS_TODO §P3-8                                              |
+| P4-4 | KaTeX math (`$…$`, `$$…$$`, data-mx-maths; lazy chunk)                                | `utils/mathParse.ts`, `components/math/`             | send `$x^2$`, `$$\int f$$`, `$5 and $10` (stays text), math inside code block (stays text) |
+| P4-8 | Encrypted-search cache (opt-in toggle, clear button, logout wipe)                      | `utils/searchCache.ts`, message-search               | enable in search panel → search → reload → coverage persists; logout wipes        |
+| N97a | Session blob migration + cross-tab logout sync                                        | `state/sessions.ts`, `useSessionSync`                | login on old build → new build migrates; logout in tab A → tab B drops to auth    |
+| P4-1 | Slack-style thread notifications (participating default, All/Mentions/Mute, badge math) | `utils/threadNotifications.ts`, `ClientNonUIFeatures`, `roomToUnread` | 6-step checklist in LOTUS_TODO §P4-1                                              |
 
 **Verified working in live testing (2026-06):** A2, B1–B4, C1, C3, D (mic/camera/deafen/screenshare/fullscreen/more-menu/PiP). Denoise quality in D is still poor — tracked under the denoise project, not a regression.
 
@@ -39,46 +44,93 @@ Implemented and gate-green; confirm each per `LOTUS_TESTING.md`, then delete the
 
 ## 🧩 Element Call source-level items — now actionable via the fork
 
-> 🔱 **[EC-FORK]** **UPDATE 2026-06-29: the fork is live.** We now own and
+> 🔱 **[EC-FORK]** **UPDATE 2026-06-30: Phase 2 IMPLEMENTED.** We own and
 > self-build Element Call (`LotusGuild/element-call` →
-> `@lotusguild/element-call-embedded`, Phase 1 done & cinny wired). A5/A6/A7
+> `@lotusguild/element-call-embedded@0.20.1-lotus.1`, cinny wired). A5/A6/A7
-> below are **no longer "won't fix"** — they are ordinary source changes. See
+> below are **fixed in the fork** — they are now ⚠️ awaiting **live
-> [`HANDOFF_ELEMENT_CALL_FORK.md`](./HANDOFF_ELEMENT_CALL_FORK.md) §10 + the Phase
+> verification** (`LOTUS_TESTING.md` §D2), not open work. See
-> 2 work list. (The iframe is **same-origin** / self-hosted; the old blocker was
+> [`HANDOFF_ELEMENT_CALL_FORK.md`](./HANDOFF_ELEMENT_CALL_FORK.md) §10. Delete each
-> that we didn't own EC's compiled source — which we now do.)
+> row once verified live.
 
-The in-call participant grid is rendered **inside EC's app**. Previously a
+The in-call participant grid is rendered **inside EC's app** — now editable source
-pre-built npm bundle we could only style/place around; now editable source.
+(previously a prebuilt npm bundle we could only style around). Status of the items
-Items from testing, with their fork-level fix path:
+from testing:
 
-- **A5 — "Focus camera":** EC supports native tile-pinning. Our bottom-bar "Focus
+- **A5 — "Focus camera": ⚠️ FIXED in fork, awaiting verify (D2-3).** cinny now
-  camera" is a programmatic wrapper that **`.click()`s the tile** today
+  sends an `io.lotus.focus_participant` widget action that pins a participant in
-  (`CallControl.ts` `focusCameraParticipant`), and during a screenshare EC
+  EC's layout (coexisting with / overriding the screenshare spotlight); the old
-  spotlights the shared screen so a camera pin may not override it. **Fork fix:**
+  `.click()`-the-tile DOM hack in `CallControl.ts` is deleted.
-  add an `io.lotus.focus_participant` widget action that pins a participant in
+- **A6 — avatar decorations in-call: ⚠️ FIXED in fork, awaiting verify (D2-4).**
-  EC's layout (coexisting with / overriding the screenshare spotlight); cinny
+  cinny pushes `io.lotus.decorations` (per-user APNG URLs) and the fork renders
-  sends it via the widget API and the DOM-click hack is deleted. _Status: Open —
+  them on EC's participant video-tile avatars — not just our pre-join lobby roster.
-  Actionable (Phase 2)._
+- **A7 — mic dead after EC's "Reconnect": ⚠️ FIXED in fork, awaiting verify
-- **A6 — avatar decorations in-call:** decorations render on **our** pre-join
+  (D2-1).** Denoise moved into EC's mic-capture/publish pipeline as a first-class
-  lobby roster (`CallMemberCard`) but not on EC's in-call video tiles. **Fork
+  LiveKit `TrackProcessor` (flag `lotusDenoiseSource=1`); EC re-runs it on every
-  fix:** render the decoration APNG inside EC's participant-tile component, fed
+  (re)publish, so reconnects keep denoise alive natively. The build-time
-  decoration slugs via widget member data. _Status: Open — Actionable (Phase 2)._
+  `getUserMedia`/`index.html` injection (the root cause) is removed. **Highest
-- **A7 — mic dead after EC's "Reconnect":** the mid-call "Connection lost /
+  blast radius — everyone's mic; verify D2-1 carefully.**
-  Reconnect" screen is **EC's own** (our load watchdog only covers an initial
-  hung load). After EC reconnects, the mic isn't re-published through our denoise
-  `getUserMedia` shim until a clean End+rejoin. **Fork fix:** move denoise into
-  EC's mic-capture/publish pipeline as a first-class audio stage — EC re-runs it
-  on every (re)publish, so reconnects keep denoise alive natively, and the
-  build-time `index.html` injection is removed. _Status: Open — Actionable
-  (Phase 2); root cause is the `getUserMedia` monkeypatch, not EC itself._
 
 ---
 
 ## 🔴 Open — Actionable
 
-### Calls / Audio
+### 🧨 Encryption / E2EE — ⚠️ EXTREME COMPLEXITY · 🧠 PLANNING SESSION REQUIRED · 👤 SENIOR ENGINEER
 
-- **N127 — ML denoise shim is never injected in `vite dev`.** The `lotusDenoise` plugin injects only on `closeBundle` (build), so ML noise suppression is silently inactive during local dev. Add a dev-mode injection (`configureServer` / `transformIndexHtml`). Dev-only impact. _Note: this **dissolves entirely** once denoise moves in-source in the fork (A7 fix) — there is then no build-time injection to be missing in dev._
+> 🧰 **Investigation kit ready (2026-07):** [`LOTUS_E2EE_INVESTIGATION.md`](./LOTUS_E2EE_INVESTIGATION.md)
+> has the per-KE capture runbook (console signatures, synapse-side queries, the
+> KE-1→KE-2 causality decision tree, ranked remediations), and the client now
+> ships a **Crypto Diagnostics** capture helper (Settings) — run it during the
+> next affected call and download the report before starting any fix.
+
+> **Observed live in prod 2026-06-30** on `chat.lotusguild.org` during a 2-person
+> **Element Call** (E2EE enabled). These span **client rust-crypto (via
+> `matrix-js-sdk@41.6.0-rc.0`) ↔ Synapse ↔ Element Call's MatrixRTC E2EE** and are
+> very likely **interrelated** (see KE-1 → KE-2). Do **not** spot-fix — they need
+> a dedicated cross-system planning session with the homeserver owner. Capture
+> full client console + a synapse-side trace for the same call before starting.
+> **None of these are caused by the EC fork work** (the issues reproduce on the
+> old build; the local mic/denoise path is unrelated to key distribution).
+
+- **KE-1 — One-time-key (OTK) upload conflict storm (CRITICAL, root-cause candidate).**
+  `POST /_matrix/client/v3/keys/upload` returns `400 M_UNKNOWN: One time key
+signed_curve25519:AAAAAAAAAGQ already exists. Old key: {…} new key: {…}` —
+  firing **continuously** (many/sec). The client repeatedly tries to publish an
+  OTK at a key id the server already holds **with a different value**, i.e. the
+  rust-crypto key store and Synapse have **diverged OTK state**. Impact: floods
+  the crypto outgoing-request loop and is the prime suspect for the downstream
+  missing-key failures (no fresh OTKs ⇒ no new Olm sessions ⇒ undecryptable
+  to-device key events). _Investigate:_ device/key-store reset-or-restore
+  mismatch, OTK id-counter desync, RC-SDK (`41.6.0-rc.0`) regression, or a
+  Synapse OTK bug. Repro signature: grep console for `already exists`.
+  **Extreme — planning session.**
+
+- **KE-2 — Element Call media keys not arriving/decrypting → audio & video cut out (CRITICAL).**
+  `MissingKey: missing key at index N for participant @user`, `skipping decryption
+due to missing key`, `MissingKey: key set not found for @user at index 0`, and
+  rust-crypto `WARN … Received an unexpected encrypted to-device event …
+event_type="io.element.call.encryption_keys"`. EC distributes per-participant
+  media keys as **encrypted to-device `io.element.call.encryption_keys`** events;
+  these aren't being received/decrypted in order, so remote LiveKit audio/video
+  can't be decrypted — **this is the "friend's audio cuts out occasionally"
+  symptom.** Almost certainly downstream of **KE-1** (broken Olm sessions). Spans
+  EC's MatrixRTC E2EE + rust-crypto to-device + Synapse. **Extreme — planning
+  session.**
+
+- **KE-3 — Timeline decryption error: missing `algorithm` field (HIGH).**
+  `Error decrypting event (… type=m.room.encrypted …): DecryptionError[msg:
+missing field 'algorithm' at line 1 column 138 …]`. A malformed/legacy
+  encrypted event (or a serialization mismatch in the RC SDK) that rust-crypto
+  can't parse. Lower frequency than KE-1/2 but a distinct decode-path failure —
+  capture the offending event id (`$SASBBzoqj…` seen) and inspect its raw content.
+
+- **KE-4 — MatrixRTC delayed-event / membership timeouts (MEDIUM-HIGH, reliability).**
+  `[MembershipManager] Network local timeout error while sending event, immediate
+retry … AbortError: Restart delayed event timed out before the HS responded`,
+  with repeated `org.matrix.msc4157.update_delayed_event`. MSC4140/4157
+  delayed-event reliability against `matrix.lotusguild.org` — can cause stale/ghost
+  call membership and missed leave events. May be partly **homeserver
+  responsiveness**; correlate with synapse latency/load. Include in the same
+  planning session since it shares the call-reliability + HS-interaction surface.
 
 ### Security & Privacy
 
@@ -99,10 +151,10 @@ Items from testing, with their fork-level fix path:
 
 ### Code Hygiene / DevEx
 
-- **Automated test suite — 231 tests across ~26 modules, a hard CI gate.** `npm test` runs Node's built-in runner via `tsx` (not vitest — Vite 8 is ahead of vitest's range) and **blocks the build job on failure**. Broad pure-logic coverage: utils (common, regex, sanitize/XSS, time, matrix, matrix-uia, mimeTypes, sort, accentColor, findAndReplace, AsyncSearch, ASCIILexicalTable, keyboard, room, matrix-crypto, featureCheck), state (settings, sessions, recentSearches, upload, typingMembers), plugins (matrix-to, call/utils, markdown/utils), lotus/avatarDecorations, search filters. Prevention work has caught + fixed **2 real bugs** (`findAndReplace` infinite-loop; `getSettings` crash-on-load when storage is blocked). **Next:** component/integration tests (the untestable-under-tsx DOM/React surface).
+- **Automated test suite — 561+ tests across 65+ modules, a hard CI gate.** `npm test` runs Node's built-in runner via `tsx` (not vitest — Vite 8 is ahead of vitest's range) and **blocks the build job on failure**. Broad pure-logic coverage: utils (common, regex, sanitize/XSS, time, matrix, matrix-uia, mimeTypes, sort, accentColor, findAndReplace, AsyncSearch, ASCIILexicalTable, keyboard, room, matrix-crypto, featureCheck, syntaxHighlight, imageCompression, user-agent, callSounds), state (settings, sessions, recentSearches, upload, typingMembers, lists, room-list, toast, scheduledMessages, backupRestore, callEmbed/callPreferences, spaceRooms, …), plugins (matrix-to, call/utils, via-servers, bad-words, recent-emoji, custom-emoji, markdown block/inline/utils), OIDC (cs-api, useParsedLoginFlows, oidcState), lotus/avatarDecorations, message-search, search filters. Prevention work has caught + fixed **4 real bugs** (`findAndReplace` infinite-loop; `getSettings` crash-on-load when storage is blocked; `isMacOS` never matching modern Macs; `isMLDenoiseSupported` throwing `ReferenceError` instead of returning false on browsers lacking the `AudioWorkletNode` binding). **Next:** component/integration tests (the untestable-under-tsx DOM/React surface).
 - **Extensive `as any` casts** across `src/` — gradual typing cleanup.
 - **`types/matrix/` mirrors SDK types** instead of importing them — drift risk.
-- **Hardcoded CDN URL** should move to an env var (the decoration CDN is now single-sourced in `avatarDecorations.ts`, but the literal is still in-repo).
+- ~~**Hardcoded CDN URL** should move to an env var~~ — **done:** `avatarDecorations.ts` already honors a `VITE_DECORATION_CDN` env override (lines 14-16); the in-repo literal is only the default. Nothing left.
 - **`patch-folds.mjs` edits `node_modules` directly** — consider `patch-package`.
 - **Infra docs:** `contrib/nginx` lacks security headers (HSTS/CSP) + uses rewrites over `try_files`; `contrib/caddy` has a placeholder path. CI/CD (`prod-deploy.yml`): sequential deploy, aggressive 1-min Netlify timeout, `package-manager-cache: false`.
 - **README:** keep the fork-sync version + logo path current. (`CONTRIBUTING.md` is intentionally left as upstream Cinny's — not a Lotus concern.)
@@ -111,4 +163,4 @@ Items from testing, with their fork-level fix path:
 
 ### Big Projects
 
-- **#5 — Seasonal themes & chat-background redesign.** Current backgrounds are basic CSS; goal is high-fidelity, research-backed, GPU-accelerated designs (layered `oklch`, `backdrop-filter`, `contain:paint`) with WCAG-AA overlay contrast. Treat each as its own design sprint.
+- ~~**#5 — Seasonal themes & chat-background redesign.**~~ **DONE (2026-06/07):** 11 seasonal/holiday overlays shipped and later toned down + given a settings preview grid; all 19 chat backgrounds redesigned (Carbon + Aurora kept per user preference), one design sprint each, GPU-friendly CSS with `prefers-reduced-motion` + pause toggle. Remaining polish rides normal bug flow, not a "big project."

LOTUS_E2EE_INVESTIGATION.md

@@ -0,0 +1,402 @@
+# Lotus Chat — E2EE Investigation Runbook (KE-1 → KE-4)
+
+> **Scope:** evidence-gathering only. Do **not** apply fixes from this document
+> without a cross-system planning session (client rust-crypto ↔ Synapse ↔
+> Element Call MatrixRTC). Symptom source: `LOTUS_BUGS.md` §"Encryption / E2EE"
+> (KE-1..KE-4), observed live 2026-06-30 on `chat.lotusguild.org` during a
+> 2-person Element Call.
+>
+> **Client:** Lotus Cinny fork, `matrix-js-sdk@41.6.0-rc.0`, rust-crypto.
+> **Server:** Synapse `1.155.0` on **LXC 151** (`10.10.10.29`), PostgreSQL 17.9
+> on **LXC 109** (`10.10.10.44`). Facts below are copy-pasteable against that
+> deployment (paths/IPs from `/root/code/matrix/README.md`).
+
+---
+
+## 0. Deployment facts used by this runbook
+
+From the matrix infra README (`/root/code/matrix/README.md`):
+
+| Thing | Value |
+|-------|-------|
+| Synapse host | LXC **151**, `10.10.10.29` (Synapse 1.155.0) |
+| Synapse log | `/var/log/matrix-synapse/homeserver.log` |
+| Synapse config | `/etc/matrix-synapse/homeserver.yaml` (+ `conf.d/`) |
+| Synapse HTTP | `10.10.10.29:8008` |
+| PostgreSQL host | LXC **109**, `10.10.10.44` (PG 17.9), db `synapse` |
+| synapse-admin UI | `http://10.10.10.29:8080` |
+| LiveKit / lk-jwt / guard | LXC 151: LiveKit `:7880/:7881`, guard `:8070`, lk-jwt `:8071` |
+| SSH path to Synapse | `ssh root@10.10.10.4` then `pct enter 151` |
+| SSH path to PG | `ssh root@10.10.10.4` then `pct enter 109` |
+
+**Getting a psql shell** (run on LXC 109, or from 151 over the network):
+
+```bash
+# On LXC 109:
+sudo -u postgres psql synapse
+# From LXC 151 (pg_hba allows 10.10.10.29):
+psql "host=10.10.10.44 user=synapse dbname=synapse"
+```
+
+**Tailing Synapse during a call** (on LXC 151):
+
+```bash
+tail -F /var/log/matrix-synapse/homeserver.log | tee /tmp/lotus-call-$(date +%s).log
+```
+
+Synapse E2EE/to-device logging is chatty at `INFO`; if a category is silent,
+temporarily raise it in `/etc/matrix-synapse/conf.d/log.yaml` (or the
+`log_config` file referenced by `homeserver.yaml`):
+
+```yaml
+loggers:
+  synapse.rest.client.keys:            { level: DEBUG }
+  synapse.handlers.e2e_keys:           { level: DEBUG }
+  synapse.storage.databases.main.end_to_end_keys: { level: DEBUG }
+  synapse.handlers.devicemessage:      { level: DEBUG }   # to-device
+```
+
+Then `systemctl reload matrix-synapse` (reload re-reads log config without a
+full restart). **Revert to `INFO` after the capture** — DEBUG is very verbose.
+
+---
+
+## 1. Per-KE evidence matrix
+
+Client greps assume Chrome/Firefox DevTools console (filter box or, better,
+"Preserve log" + save-as). The **Crypto Diagnostics** card (Settings →
+Developer Tools) auto-captures every signature below into a downloadable JSON —
+use it as the primary client artifact and DevTools as the raw backup.
+
+### KE-1 — OTK upload conflict storm (root-cause candidate)
+
+- **Console signature (grep):**
+  - `already exists`
+  - full: `POST /_matrix/client/v3/keys/upload … 400 M_UNKNOWN: One time key signed_curve25519:<id> already exists. Old key: {…} new key: {…}`
+- **Capture client-side:**
+  - Timestamp (first occurrence + rate — "N/sec"), **device id**, **user id**.
+  - DevTools → **Network** → filter `keys/upload`: for a failing call save the
+    **request body** (the `one_time_keys` map — note the exact `signed_curve25519:<id>`)
+    and the **response body** (the `Old key` / `new key` JSON). This diff is the
+    smoking gun: same key-id, different value ⇒ store vs server divergence.
+  - Whether it self-heals or loops forever (KE-1 loops).
+- **Synapse log grep (LXC 151):**
+  ```bash
+  grep -E "keys/upload|One time key .* already exists|OneTimeKey" \
+    /var/log/matrix-synapse/homeserver.log | grep "<user_id>"
+  ```
+- **Synapse SQL (LXC 109) — what the server thinks it holds:**
+  ```sql
+  -- Current OTK inventory for the device (compare key_id set against the
+  -- request body the client keeps retrying).
+  SELECT algorithm, key_id, ts_added_ms
+  FROM e2e_one_time_keys_json
+  WHERE user_id = '@user:matrix.lotusguild.org'
+    AND device_id = '<DEVICE_ID>'
+  ORDER BY algorithm, key_id;
+
+  -- Server's advertised counts (this is what /sync tells the client it has,
+  -- and drives whether the client decides to upload more).
+  SELECT algorithm, count(*) FROM e2e_one_time_keys_json
+  WHERE user_id = '@user:matrix.lotusguild.org' AND device_id = '<DEVICE_ID>'
+  GROUP BY algorithm;
+
+  -- Fallback key state (used when OTKs are exhausted).
+  SELECT algorithm, key_id, used, ts_added_ms
+  FROM e2e_fallback_keys_json
+  WHERE user_id = '@user:matrix.lotusguild.org' AND device_id = '<DEVICE_ID>';
+  ```
+  > Table names are Synapse 1.155 (`e2e_one_time_keys_json`,
+  > `e2e_fallback_keys_json`). If a name is absent, list with `\dt e2e*` in psql.
+- **Confirms:** if the offending `key_id` (from the 400) is **present** in
+  `e2e_one_time_keys_json` with a **different** stored value than the client's
+  request body → OTK state has diverged (rust-crypto store vs Synapse). That is
+  the KE-1 root condition.
+
+### KE-2 — EC media keys not arriving/decrypting (audio/video cutouts)
+
+- **Console signature (grep):**
+  - `MissingKey`
+  - `missing key at index` (e.g. `MissingKey: missing key at index N for participant @user`)
+  - `key set not found`
+  - `io.element.call.encryption_keys` (rust-crypto: `WARN … Received an unexpected encrypted to-device event … event_type="io.element.call.encryption_keys"`)
+- **Capture client-side:**
+  - Timestamp windows where a participant's audio/video cut out, and the
+    `@participant` + `index N` from the message.
+  - The `io.element.call.encryption_keys` warnings (these are the media-key
+    to-device events failing to decrypt) with their timestamps.
+  - Own device id + user id (to correlate with the sender's Olm session).
+- **Synapse log grep (LXC 151) — to-device delivery of the media keys:**
+  ```bash
+  grep -E "io.element.call.encryption_keys|m.room.encrypted|/sendToDevice|to_device" \
+    /var/log/matrix-synapse/homeserver.log | grep -E "<user_id>|<participant_id>"
+  ```
+- **Synapse SQL (LXC 109) — undelivered / queued to-device events:**
+  ```sql
+  -- Backlog of to-device messages queued for the affected device. A growing
+  -- count here = the HS has the media-key events but the device isn't draining
+  -- them via /sync (or they were sent to a stale device id).
+  SELECT user_id, device_id, count(*) AS pending
+  FROM device_inbox
+  WHERE user_id = '@user:matrix.lotusguild.org'
+  GROUP BY user_id, device_id;
+
+  -- Cross-check the device id the sender is targeting actually exists / is current.
+  SELECT device_id, display_name, last_seen, ts
+  FROM devices WHERE user_id = '@user:matrix.lotusguild.org';
+  ```
+- **Confirms:** to-device events present but undecryptable (client shows the
+  `io.element.call.encryption_keys` "unexpected encrypted" warning) ⇒ there is
+  **no valid Olm session** to decrypt them — the expected downstream of KE-1.
+
+### KE-3 — Timeline decryption error: missing `algorithm` field
+
+- **Console signature (grep):**
+  - `DecryptionError`
+  - full: `Error decrypting event (… type=m.room.encrypted …): DecryptionError[msg: missing field 'algorithm' at line 1 column 138 …]`
+- **Capture client-side:**
+  - The **event id** (`$SASBBzoqj…` was one) and the **room id**.
+  - Pull the raw event JSON via DevTools or the Developer Tools account-data/event
+    viewer, or directly:
+    ```
+    GET https://matrix.lotusguild.org/_matrix/client/v3/rooms/<roomId>/event/<eventId>
+    ```
+    Inspect `content` — confirm whether `algorithm` (should be
+    `m.megolm.v1.aes-sha2`) is truly absent vs a serialization mismatch.
+- **Synapse log grep (LXC 151):**
+  ```bash
+  grep -E "<eventId>" /var/log/matrix-synapse/homeserver.log
+  ```
+- **Synapse SQL (LXC 109) — the stored event content as the HS holds it:**
+  ```sql
+  SELECT ej.event_id, e.type, e.sender, e.origin_server_ts,
+         (ej.json::json -> 'content' -> 'algorithm') AS algorithm
+  FROM event_json ej
+  JOIN events e USING (event_id)
+  WHERE ej.event_id = '$SASBBzoqj...';
+  ```
+- **Confirms:** if the stored `content.algorithm` is **NULL/absent** on the HS →
+  a malformed/legacy event was persisted (sender-side or federation). If it is
+  **present** on the HS but the client throws → an RC-SDK deserialization bug.
+  This distinction decides whether KE-3 is a data problem or a client problem.
+
+### KE-4 — MatrixRTC delayed-event / membership timeouts
+
+- **Console signature (grep):**
+  - `update_delayed_event` (`org.matrix.msc4157.update_delayed_event`)
+  - `delayed event` / `Restart delayed event timed out`
+  - full: `[MembershipManager] Network local timeout error while sending event, immediate retry … AbortError: Restart delayed event timed out before the HS responded`
+- **Capture client-side:**
+  - Timestamps of each timeout; whether they correlate with call join/leave or
+    with general sync slowness.
+  - DevTools → Network: the `…/delayed_events…` / `update_delayed_event`
+    requests — their **HTTP status and latency** (timed-out vs slow-200).
+- **Synapse log grep (LXC 151):**
+  ```bash
+  grep -E "delayed_event|msc4140|msc4157|update_delayed" \
+    /var/log/matrix-synapse/homeserver.log | grep "<user_id>"
+  # HS responsiveness in the same window (KE-4 may be pure latency):
+  grep -E "Processed request|/sync" /var/log/matrix-synapse/homeserver.log | tail -50
+  ```
+- **Server-side corroboration (Grafana, `dashboard.lotusguild.org`):** Synapse
+  p99 response time (excl. `/sync`), event-processing lag, DB query latency for
+  the call window. High latency here ⇒ KE-4 is (partly) homeserver
+  responsiveness, not a client bug.
+- **Confirms:** timeouts that line up with HS latency spikes → reliability/load;
+  timeouts with a healthy HS → client MembershipManager retry logic.
+
+---
+
+## 2. Causality hypothesis
+
+```
+KE-1  OTK upload conflict storm
+      (rust-crypto store ↔ Synapse OTK state DIVERGED; server rejects re-uploads)
+        │  no fresh OTKs can be published/claimed
+        ▼
+      No new Olm (1:1) sessions can be established with this device
+        │
+        ▼
+KE-2  EC media-key to-device events (io.element.call.encryption_keys)
+      arrive but cannot be decrypted  ⇒  MissingKey at index N
+      ⇒  friend's audio/video cuts out
+```
+
+KE-3 (missing `algorithm`) and KE-4 (delayed-event timeouts) are **likely
+independent** of the KE-1→KE-2 chain: KE-3 is a decode/serialization path,
+KE-4 is a MatrixRTC-vs-HS reliability path. Confirm/refute independence with the
+decision tree below.
+
+### Decision tree — which capture confirms/refutes each link
+
+```
+Q1. Does the KE-1 offending key_id from the 400 response exist in
+    e2e_one_time_keys_json with a DIFFERENT value than the client request body?
+    ├─ YES → OTK divergence CONFIRMED (KE-1 root). Go to Q2.
+    └─ NO  → Not divergence. Check: are OTK counts at 0 with fallback key `used=true`?
+             ├─ YES → OTK exhaustion, not divergence — different remediation.
+             └─ NO  → Suspect RC-SDK 41.6.0-rc.0 upload-loop regression (see §3).
+
+Q2. During the same call, are io.element.call.encryption_keys to-device events
+    present in device_inbox / Synapse to-device logs for our device id?
+    ├─ YES + client shows "unexpected encrypted"/MissingKey
+    │        → KE-1 ⇒ KE-2 LINK CONFIRMED (events delivered, no Olm session to open them).
+    ├─ YES + client decrypts fine, but LiveKit still silent
+    │        → KE-2 is downstream of LiveKit/SFU, NOT KE-1. Decouple from crypto.
+    └─ NO (nothing queued/targeted our device)
+             → media keys never sent to us: stale device id / membership (see KE-4)
+               → KE-2 is a device-targeting problem, weakly linked to KE-1.
+
+Q3. KE-3: is content.algorithm NULL in event_json on the HS?
+    ├─ YES → malformed persisted event (sender/federation). Independent of KE-1.
+    └─ NO  → client-side RC-SDK deserialization bug. Independent of KE-1.
+
+Q4. KE-4: do delayed-event timeouts coincide with Synapse p99 latency spikes
+    (Grafana) in the same minute?
+    ├─ YES → homeserver responsiveness/load. Independent of KE-1..KE-3.
+    └─ NO  → client MembershipManager retry behavior. Independent.
+```
+
+---
+
+## 3. Ranked remediation options (with blast radius)
+
+> Ordered least-destructive → most-destructive. **Do not run any of these as a
+> "fix" before the planning session** — they are listed so evidence collection
+> can be paired with a recovery plan. Confirm the root condition (Q1/Q2) first.
+
+1. **Per-device logout + re-login of the affected device** *(lowest blast radius)*
+   - **What:** log the one glitching device out and back in. Forces a fresh
+     device id, fresh device keys, and a clean OTK batch — sidesteps a diverged
+     OTK store without touching other sessions.
+   - **Blast radius:** that device only. Other sessions/devices untouched.
+   - **Cost:** the new device must be re-verified (cross-signing) and will need
+     to restore room keys from **key backup** to read old encrypted history.
+   - **Confirms/uses:** if KE-1 stops after this, OTK-store divergence (Q1) was
+     the cause.
+
+2. **Client crypto-store reset (`clearLoginData` path)** *(medium)*
+   - **What:** `clearLoginData()` in `src/client/initMatrix.ts` (coordinator's
+     file — do not edit) **deletes ALL IndexedDB databases** (incl.
+     `web-sync-store` and the rust-crypto store `crypto-store`), **unregisters
+     service workers**, **clears all Cache Storage**, and **`localStorage.clear()`**,
+     then reloads. `clearCacheAndReload()` is lighter — it only calls
+     `mx.store.deleteAllData()` (sync cache) and does **not** wipe crypto.
+   - **Blast radius:** this browser profile only, but total: you are logged out,
+     lose all cached sync state, drafts, settings, and **the local
+     megolm/room-key store**.
+   - **⚠️ Message-history / backup implication:** wiping `crypto-store` destroys
+     locally-held **room keys (megolm inbound sessions)**. Any history **not
+     backed up to server-side Key Backup** becomes **permanently undecryptable
+     on this device**. Before doing this: verify Key Backup is enabled and the
+     recovery key / passphrase is available (Settings → Security), or the user
+     loses readable history. Cross-signing must be re-established too.
+   - **Use when:** the rust-crypto store itself is corrupt/diverged and option 1
+     didn't clear it.
+
+3. **SDK pin change off the RC** *(medium — codebase change, needs rebuild)*
+   - **Current pin:** `package.json` → `"matrix-js-sdk": "41.6.0-rc.0"` (a
+     release candidate).
+   - **Finding (npm / GitHub changelog, checked 2026-07):** stable **`41.6.0`**
+     was released **2026-05-26**. Its only changelog line is *"Throw sane error
+     on completeLoginOnNewDevice IdP rejection"* — **no OTK / keys-upload / Olm /
+     to-device fix** relative to the RC. Later stable lines exist
+     (`41.7.0`, `41.8.0`; `41.7.0-rc.3` / `41.9.0-rc.0` seen as pre-releases).
+     Nearby crypto-relevant entries: `41.5.0` *"Enable encrypted history sharing
+     by default"*; `41.4.0` key-backup handling. **No changelog entry directly
+     addresses the KE-1 OTK-conflict symptom** in the immediate range — so
+     moving RC→`41.6.0` stable is a low-risk hygiene step but is **not expected
+     to fix KE-1 by itself**. Before pinning, re-read the CHANGELOG for any
+     `41.7.x`/`41.8.x` OTK/one-time-key/olm entry that post-dates this note.
+   - **Blast radius:** all users after the next `cinny-build.sh` deploy. Test the
+     rust-crypto IndexedDB schema — a downgrade triggers the `IDB_VERSION_CONFLICT`
+     path in `initMatrix.ts`.
+
+4. **Synapse-side OTK row surgery** *(LAST RESORT — highest danger)*
+   - **What:** deleting/rewriting rows in `e2e_one_time_keys_json` (and/or
+     `e2e_fallback_keys_json`, `device_inbox`) for the affected device to force
+     the client to re-upload a clean batch.
+   - **⚠️ Danger:** direct writes to Synapse crypto tables can **desync every
+     device of that user**, break Olm sessions **for everyone who has claimed one
+     of those keys**, and are easy to get wrong (wrong `key_id`, cache not
+     invalidated). Synapse caches OTK counts — a raw DELETE without a restart can
+     leave the advertised count wrong, **worsening** the KE-1 loop.
+   - **Guardrails if ever done (planning session + HS owner only):** full
+     `pg_dump` of `synapse` first; do it during **zero active calls**; delete only
+     the exact diverged `key_id` for the exact `device_id`; `systemctl restart
+     matrix-synapse` to flush caches; then log the device out/in (option 1) so it
+     republishes. **Never** run this speculatively.
+
+---
+
+## 4. "Capture session" checklist (run during the next call)
+
+Do these **in order**. Aim to have client + server capturing the **same call**.
+
+1. **Prep server tail (LXC 151):** SSH in, start
+   `tail -F /var/log/matrix-synapse/homeserver.log | tee /tmp/lotus-call-$(date +%s).log`.
+   (Optionally raise the `synapse.rest.client.keys` / `handlers.e2e_keys` /
+   `handlers.devicemessage` loggers to DEBUG per §0 and `systemctl reload
+   matrix-synapse` — remember to revert after.)
+2. **Prep client:** open Lotus Chat → Settings → Developer Tools → **enable
+   Developer Tools** so the **Crypto Diagnostics** card is visible; note its
+   entry count starts at (or reset by reload to) 0.
+3. **Open DevTools** (F12) → Console: enable **Preserve log**; Network tab:
+   enable **Preserve log** + **Record**. Note your **device id** and **user id**
+   (Settings → Devices / Developer Tools → Copy access token page shows ids).
+4. **Note wall-clock start time** (ISO/UTC) on both machines so logs align.
+5. **Join the Element Call** with the second participant; reproduce the fault
+   (wait for the audio/video cutouts and let KE-1 storm run ~30–60s).
+6. **When a fault occurs, note the wall-clock timestamp** and which symptom
+   (audio cut / video freeze / etc.) — this bounds the log window.
+7. **Client artifacts:** in the Crypto Diagnostics card click **Download report**
+   (`lotus-crypto-diag-<ts>.json`); in DevTools Network, save the failing
+   `keys/upload` request+response (right-click → Save/Copy), and the raw HAR
+   (Network → Save all as HAR) for the call window.
+8. **Grab KE-3 event id / KE-2 participant+index** from the console (or the
+   diag JSON `entries[]`) for the SQL lookups.
+9. **Server artifacts:** stop the tail; run the per-KE greps and SQL from §1
+   against the noted device id / user id / event id, saving output alongside the
+   client JSON. Screenshot the Grafana Synapse latency panels for the window
+   (for KE-4).
+10. **Bundle & label:** put client JSON + HAR + server log slice + SQL output in
+    one folder named with the call's UTC start time. Revert any DEBUG log config
+    (`systemctl reload matrix-synapse`). Hand off to the planning session — **do
+    not apply §3 remediations yet.**
+
+---
+
+## 5. Client diagnostics helper (this kit)
+
+- **`src/app/utils/cryptoDiagLog.ts`** — capture-only console instrumentation.
+  - `installCryptoDiagLog()` — idempotent; wraps `console.warn`/`console.error`
+    with pass-through wrappers (originals always called) that ring-buffer (max
+    **200**) any line matching the KE signatures. No network, no timers.
+  - `getCryptoDiagEntries()` — snapshot copy of the buffer (`{ ts, level, ke,
+    signature, message }`, most-recent-last).
+  - `buildCryptoDiagReport(mx)` — JSON string: SDK version, device id, user id,
+    sync state, `cryptoReady` (`mx.getCrypto()` presence), per-KE counts, and the
+    entry buffer. No tokens/PII beyond those ids; captured log lines are retained
+    verbatim as evidence.
+  - **Signatures → KE mapping:** `already exists`→KE-1; `missing key at index` /
+    `io.element.call.encryption_keys` / `MissingKey`→KE-2; `DecryptionError`→KE-3;
+    `update_delayed_event` / `delayed event`→KE-4.
+- **`src/app/features/settings/developer/CryptoDiagnostics.tsx`** — a folds
+  `SequenceCard`/`SettingTile` card (mirrors `developer-tools/DevelopTools.tsx`)
+  showing the live matched-entry count (Badge) and a **Download report** button
+  (Blob → `lotus-crypto-diag-<ts>.json`, same download idiom as
+  `room-settings/ExportRoomHistory.tsx`).
+
+### Recommended mount points (coordinator)
+
+- **Install call:** call `installCryptoDiagLog()` **as early as possible during
+  boot** so it captures crypto errors from first sync — ideally at the top of
+  the client entry module or inside `ClientRoot` before/around `initClient`
+  (e.g. `src/app/pages/client/ClientRoot.tsx`). It is idempotent, side-effect
+  only, and needs no `mx`, so a module-scope call at app entry is safe. (Do
+  **not** put it in `initMatrix.ts` — that file is off-limits.)
+- **Settings card:** render `<CryptoDiagnostics />` inside the Developer Tools
+  page — in `src/app/features/settings/developer-tools/DevelopTools.tsx`, add it
+  to the `Box direction="Column" gap="700"` list (guarded by the existing
+  `developerTools` flag), right after the "Access Token" card. It pulls `mx`
+  from `useMatrixClient()` itself, so it just needs to be placed in the tree.

LOTUS_FEATURES.md

@@ -18,14 +18,16 @@ Last updated: June 2026.
 9. [Per-Message Read Receipts](#per-message-read-receipts)
 10. [Delivery Status Indicators](#delivery-status-indicators)
 11. [Messaging Enhancements](#messaging-enhancements)
-12. [Presence](#presence)
+12. [Threads (P3-8)](#threads-p3-8)
-13. [UX & Composer](#ux--composer)
+13. [Presence](#presence)
-14. [Room Customization](#room-customization)
+14. [UX & Composer](#ux--composer)
-15. [Moderation](#moderation)
+15. [Room Customization](#room-customization)
-16. [Notifications](#notifications)
+16. [Moderation](#moderation)
-17. [Server Integration](#server-integration)
+17. [Notifications](#notifications)
-18. [Infrastructure](#infrastructure)
+18. [Server Integration](#server-integration)
-19. [Key Custom Files](#key-custom-files)
+19. [Infrastructure](#infrastructure)
+20. [Desktop App Features](#desktop-app-features)
+21. [Key Custom Files](#key-custom-files)
 
 ---
 
@@ -322,14 +324,104 @@ Users can set a custom background color for `@mention` chips that highlight thei
 
 ## Voice / Video Call Improvements
 
-> 🔱 **[EC-FORK]** Element Call is embedded as a **pre-built npm bundle** today.
+> 🔱 **[EC-FORK] LIVE (2026-06).** Element Call is now our **self-built fork**
-> The plan to fork & self-build it from source for true ownership — and which of
+> (`@lotusguild/element-call-embedded@0.20.1-lotus.1`, source at
-> the items below would move into our EC source — is in
+> `LotusGuild/element-call`), served same-origin — no longer the upstream
+> pre-built npm bundle. Several in-call behaviors below are now first-class
+> source changes rather than DOM/widget hacks. Background, plan, and the Phase-2
+> work list are in
 > [`HANDOFF_ELEMENT_CALL_FORK.md`](./HANDOFF_ELEMENT_CALL_FORK.md).
 
-### Element Call Upgrade
+### Element Call — Self-Built Fork (`0.20.1-lotus.1`)
 
-Upgraded embedded Element Call widget from **0.16.3** to **0.19.4**.
+The embedded widget was upgraded **0.16.3 → 0.19.4 → 0.20.1**, then **forked**.
+We self-build `LotusGuild/element-call` and publish it to our private Gitea npm
+registry as `@lotusguild/element-call-embedded`; cinny consumes that instead of
+`@element-hq/element-call-embedded`. The iframe prints
+`Element Call embedded-v0.20.1-lotus.1` in its console (vs. `embedded-v0.20.1`
+upstream) — the quickest way to confirm a deploy landed the fork.
+
+All custom behavior lives in the fork's `src/lotus/` modules and is **additive
+and dormant by default**, gated by URL flags / widget actions the host opts into,
+so a stock EC config is byte-for-byte upstream behavior.
+
+**Active (cinny drives them today):**
+
+| #   | Feature                           | Mechanism                                                                                                                               | Replaces (old hack)                                                                                                 |
+| --- | --------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- |
+| A7  | **Denoise in-source**             | ML noise suppression runs inside EC as a LiveKit `TrackProcessor<Audio>` (flag `lotusDenoiseSource=1`); re-applied on every (re)publish | the build-time `getUserMedia` monkeypatch injected into `index.html` — **removed**. Fixes mic-dead-after-reconnect. |
+| #2  | **Speaking / mute events**        | EC emits `io.lotus.call_state` (throttled); cinny reads speaker + mute state from it (flag `lotusCallState=1`)                          | scraping EC's DOM for `[data-lk-speaking]` (kept only as fallback)                                                  |
+| A5  | **Focus participant**             | host sends `io.lotus.focus_participant` to pin a tile, coexisting with / overriding the screenshare spotlight                           | the `.click()`-the-tile DOM hack in `CallControl.ts` — **removed**                                                  |
+| #6  | **In-call avatar decorations**    | host pushes `io.lotus.decorations` (per-user APNG URLs); the fork renders them on EC's video-tile avatars                               | previously impossible — decorations only showed on our pre-join lobby roster                                        |
+| #5  | **Native transparent background** | flag `lotusTransparent=1` makes EC's surface transparent so the host wallpaper shows through                                            | the injected `background:none !important` CSS                                                                       |
+
+**Now wired (cinny drives them — ⚠️ awaiting live verification):**
+
+| #     | Capability           | Widget action                                                                        | cinny surface                                                       |
+| ----- | -------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------- |
+| P5-15 | **Audio inject**     | `io.lotus.inject_audio` — plays a clip into the call as a separately published track | In-Call Soundboard (uploadable clips) — see below                   |
+| P5-31 | **Quality controls** | `io.lotus.set_quality` — sets audio/screenshare encoding bitrate/framerate           | Call Quality Controls (user settings + room-admin caps) — see below |
+
+> Both were dormant capabilities; cinny now drives them (armed via
+> `lotusAudioInject=1`). The **only** EC item still open is the P5-31
+> **server-side** quality guard (a `voice-limit-guard`-style sidecar reading
+> `io.lotus.room_quality`) for hard enforcement across all Matrix clients — the
+> client cap is best-effort.
+
+### In-Call Soundboard (P5-15)
+
+A soundboard button (🔔) in the call controls bar opens a popout of the user's
+clips. Clicking one **injects it into the call as a real published LiveKit
+track** (every participant hears it, via the fork's `io.lotus.inject_audio`) and
+plays it locally for the presser (LiveKit doesn't loop your own track back).
+
+- **User-uploadable, like custom emoji/sticker packs.** Clips are stored in the
+  `io.lotus.soundboard` account data event, so they **sync across all your
+  devices**. Upload short audio (≤ 1 MB, ≤ 40 clips) from the popout; delete
+  inline.
+- Authenticated media can't be fetched from the widget's realm, so the host
+  resolves each mxc clip → an authenticated download → a same-session `blob:`
+  object URL and hands that to the widget.
+- Gated by the **Soundboard** toggle (Settings → General → Calls) with a volume
+  slider. The button is hidden when disabled.
+- Files: `utils/soundboardClips.ts`, `hooks/useSoundboard.ts`,
+  `features/call/CallSoundboard.tsx`, `plugins/call/CallControl.ts#injectAudio`.
+
+### Call Quality Controls (P5-31)
+
+Discord-style encoding controls applied to the local tracks via the fork's
+`io.lotus.set_quality` (`RTCRtpSender.setParameters` across all simulcast
+encodings, re-applied on every re-publish/reconnect).
+
+- **User settings** (Settings → General → Calls): Microphone Bitrate,
+  Screenshare Bitrate, Screenshare Framerate (each defaults to **Auto**).
+- **Room-admin caps**: admins set a ceiling in Room Settings → General → Voice
+  (`io.lotus.room_quality` state event); every Lotus client clamps its per-user
+  quality to `min(user setting, room cap)`.
+- Applied by the `useCallQuality` hook on join and whenever settings/caps
+  change; `utils/callQuality.ts` builds the payload (unit-tested).
+
+**Server-enforced call permissions (hard, ALL clients).** The same
+`io.lotus.room_quality` event carries a **publish-source policy**
+(`allow_screenshare`, `allow_camera`) enforced server-side by
+`voice-limit-guard` (matrix repo, LXC 151): it re-signs the LiveKit JWT's
+`canPublishSources`, so the SFU refuses screenshare/camera tracks for **every**
+Matrix client (Element, FluffyChat, our fork) — not just Lotus. Admins toggle
+these in Room Settings → Voice → **Call Permissions**; cinny also hides the
+blocked buttons in the call bar. Enforcement is **live**: the JWT re-sign covers
+new joins, and a background reconcile loop revokes an **in-progress**
+screenshare/camera (via LiveKit `UpdateParticipant`) within ~3 s of an admin
+flipping the policy — so it kills active shares mid-call, not just future ones.
+
+- **Why numeric caps aren't server-enforced:** LiveKit is a pure SFU (forwards,
+  never transcodes) and has no publisher bitrate/fps field anywhere in the JWT
+  grant, room config, server `limit:`, or admin API; stock Element Call ignores
+  room metadata for publish quality. Numeric caps are therefore inherently
+  **cooperative** — our fork honors them, which is the design above. The
+  publish-source policy is the one genuine hard, cross-client lever, and it's
+  implemented.
+- **Not yet**: screenshare resolution control (needs a `getDisplayMedia` hook in
+  the fork).
 
 ### Camera Default Off
 
@@ -422,7 +514,7 @@ A comprehensive mic noise-suppression system in **Settings → General → Calls
 
 **Advanced Features & Test Options:**
 
-- **Multiple ML Models:** Toggle between **RNNoise** (standard hybrid) and **Speex** (legacy DSP-based) to compare artifact levels and suppression strength.
+- **Multiple ML Models:** Four in-source models, selectable from a dropdown **ordered by quality/CPU** (best first): **DeepFilterNet 3** (48 kHz, best), **DTLN** (16 kHz), **RNNoise** (48 kHz), **Speex** (48 kHz, lightest). The **tier default is Browser-native**; when a user opts into ML the default model is **DeepFilterNet 3**.
 - **Series Suppression (Combination):** Optional toggle to run the browser's native stationary noise filter _before_ the ML model. This allows testing the individual performance of the ML model vs the combined effectiveness at removing fan hum.
 - **Noise Gate:** Configurable hardware-style gate with a dB threshold. Hard-cuts all audio when input is below the threshold, ensuring absolute silence between sentences.
 - **Live Microphone Meter:** A real-time volume visualizer in the settings panel to help users accurately tune their Noise Gate threshold.
@@ -431,20 +523,44 @@ A comprehensive mic noise-suppression system in **Settings → General → Calls
 - **Support Detection:** UI now detects `AudioWorklet` / `AudioContext` support and disables ML options in unsupported environments.
 - **Status Reporting:** The ML shim notifies the host app via `postMessage`. If initialization fails, a system toast alerts the user of the fallback to the raw microphone.
 
-**Open-Source Model Roadmap:**
+**Open-Source Models (all now in-source in the EC fork):**
-| Model | Transients (Clicks) | Voice Quality | CPU Usage (WASM) |
+| Model | Transients (Clicks) | Voice Quality | CPU Usage (WASM) | Sample rate |
-| :--- | :--- | :--- | :--- |
+| :--- | :--- | :--- | :--- | :--- |
-| **RNNoise** | Poor | Moderate | < 5% |
+| **DeepFilterNet 3** (ML default) | **Excellent** | **Very High** | 25-50%+ | 48 kHz |
-| **DTLN** | Good | High | 10-20% |
+| **DTLN** | Good | High | 10-20% | 16 kHz |
-| **DeepFilterNet 3** | **Excellent** | **Very High** | 25-50%+ |
+| **RNNoise** | Poor | Moderate | < 5% | 48 kHz |
+| **Speex** | Poor | Low | < 5% | 48 kHz |
 
-> **Note:** DeepFilterNet 3 is planned for future inclusion in the desktop build where larger binaries and higher CPU overhead are more acceptable.
+> **Update (2026-06):** with the EC fork live, denoise runs **inside** Element
+> Call as a LiveKit `TrackProcessor` and **all four models ship in-source**
+> (DTLN at 16 kHz, the rest at 48 kHz; the processor degrades to the raw mic
+> rather than ever going silent). The model picker selects between them.
+
+> **Update (2026-07) — quality, reliability & AEC/AGC:**
+>
+> - **Quality tuning** (addresses the "robotic/underwater" RNNoise reports):
+>   a **dry/wet attenuation floor** (default ~-16 dB) blends a little raw mic
+>   under the denoised signal so suppression can't fully collapse the noise
+>   floor — applied only to the low-latency flat models (RNNoise/Speex); DTLN/DFN
+>   would comb-filter, so they rely on their own level. The **noise gate now runs
+>   after the ML stage**, and **DeepFilterNet 3 level 80 → 60**. Tunable via the
+>   `lotusDenoiseFloor` param.
+> - **AEC/AGC:** browser **echo cancellation stays ON**, but the ML tier now sets
+>   **auto gain control OFF** (`autoGainControl=false`) so the browser's dynamic
+>   gain doesn't fight the ML model. Browser/off tiers keep AGC on. (Remote
+>   playback stays on standard elements — no AEC-defeat vector.)
+> - **Reliability:** never-silent watchdog (auto-resume a suspended context),
+>   `resume()` timeout (no track-lock deadlock), rejected-WASM-fetch eviction
+>   (transient failures recover), activation off the local participant (works
+>   solo), and init/build-failure leak fixes.
+> - Real-call **audio-quality** A/B (model choice, floor value, AGC on/off) is the
+>   open by-ear validation item — see `LOTUS_TESTING.md` §D2-1.
 
 ### Files
 
-- `build/lotus-denoise.js` — multi-model getUserMedia shim
+- **EC fork** `src/lotus/lotusDenoise.ts` + `lotusDenoiseProcessor.ts` — in-source LiveKit `TrackProcessor` (RNNoise/Speex 48 kHz, DTLN 16 kHz, DeepFilterNet 48 kHz); activated by `lotusDenoiseSource=1`. (The old build-time `getUserMedia` shim `build/lotus-denoise.js` is **removed**.)
-- `vite.config.js` — `lotusDenoise()` plugin (copies assets for RNNoise, Speex, and NoiseGate)
+- `vite.config.js` — `lotusDenoise()` plugin (now only **copies model assets** for the fork to load; no longer injects a shim)
-- `src/app/plugins/call/CallEmbed.ts` — advanced tier → widget URL params
+- `src/app/plugins/call/CallEmbed.ts` — advanced tier → `lotusDenoiseSource` widget URL param
 - `src/app/utils/lotusDenoiseUtils.ts` — support detection and model comparison metadata
 - `src/app/features/settings/general/General.tsx` — advanced settings UI + mic meter
 
@@ -575,6 +691,24 @@ Context menu → **Forward** allows forwarding a message to any room the user is
 - The search panel accepts `from_ts` and `to_ts` values (epoch milliseconds) passed to the search API
 - A chip shows the active date range with an **×** button to clear it
 
+### Encrypted Search Cache (P4-8, opt-in)
+
+Persistent local index for encrypted-room search, so coverage survives page reloads instead of requiring re-pagination + re-decryption every session.
+
+- Raw IndexedDB (`lotus-search-cache`): message rows keyed `[roomId, eventId]` + per-room coverage markers; merged into local search results with in-memory-wins dedupe
+- **Opt-in, default OFF** (it stores decrypted text at rest): toggle + "Clear cached index" live in the search panel's Encrypted Rooms section, with the privacy note "Stores decrypted text on this device"
+- Always wiped on logout; any IndexedDB error degrades to a cache-miss (never breaks search)
+- Files: `src/app/utils/searchCache.ts`, `src/app/state/searchCacheEnabled.ts`, `features/message-search/useLocalMessageSearch.ts`
+
+### Math / LaTeX Rendering (P4-4)
+
+KaTeX-rendered math in messages, two paths:
+
+- **Spec path (CS-API §11.5):** `<span/div data-mx-maths="…">` in `formatted_body` renders the attribute's LaTeX (block for div, inline for span); on render failure the element's child fallback content shows instead
+- **Plain-text path:** `$…$` (inline) and `$$…$$` (block) with conservative rules — escape-aware (`\$`), currency-guarded (`$5 and $10` stays text), never inside `code`/`pre`
+- KaTeX + its CSS load lazily on first math encountered — zero cost to the main bundle
+- Files: `src/app/utils/mathParse.ts` (+14 tests), `components/math/KaTeX.tsx`, `plugins/react-custom-html-parser.tsx`
+
 ### Image / Video Captions
 
 Images and videos can be sent with a caption. The caption and media are sent as a single event.
@@ -650,6 +784,36 @@ Generic (non-domain-specific) cards display a Google S2 favicon. Empty or unpars
 
 ---
 
+## Threads (P3-8)
+
+Full threaded-conversation support (`m.thread`, matrix-js-sdk `threadSupport`), Element-consistent.
+
+### Thread Panel
+
+A right-side drawer (mirrors the members drawer; fullscreen on mobile) with the thread's root message emphasized at top, an "N replies" divider, the full reply timeline (virtualized, back-paginates via `/relations`, decrypts E2EE threads), reactions/edits/redactions, and its own composer. Open it from **Reply in Thread** in the message menu, a reply's thread indicator, or a summary chip; close with **×** or Escape. Reading the panel sends threaded read receipts so per-thread unread counts clear.
+
+### Summary Chips
+
+Root messages in the main timeline show a **"N replies · time"** chip (server-aggregated `m.thread` bundle, or the live Thread once loaded) with an unread badge — threaded replies no longer render inline in the main timeline, so the chip is how conversations stay discoverable.
+
+### Thread Composer
+
+The panel embeds the full composer (uploads, emoji, stickers, GIFs, voice, location, polls) with drafts, reply state, and upload queues **isolated per thread** (`roomId::threadRootId` keys). Replies-to-replies produce spec-correct `m.thread` + `m.in_reply_to` (`is_falling_back: false`). Scheduling and slash commands are disabled inside threads (v1).
+
+### Notifications (Slack-style, P4-1)
+
+By default you're notified for a thread reply only when you **participate** in that thread (you've posted in it) or the reply **@mentions** you — other threads accumulate quietly behind their chip badges. Every thread can be overridden from the bell menu in the panel header: **Default (participating) / All replies / Mentions only / Mute**. Modes sync across your devices (`io.lotus.thread_notifications` account data, auto-pruned). Muting a thread silences notifications and sounds, removes the chip's unread badge (a small bell-mute glyph shows instead), and subtracts that thread from the room's sidebar unread badge (client-side — other Matrix clients on the account still count it).
+
+### Under the Hood
+
+- `threadSupport: true` (startClient) partitions thread events into SDK `Thread` timelines; markAsRead sends **unthreaded** receipts so room badges keep clearing
+- Thread replies are notified via exactly one path (room-level `ThreadEvent.NewReply` w/ per-thread dedupe + panel-aware focus suppression); the main timeline notifier is thread-guarded, and room badges refresh live on `RoomEvent.UnreadNotifications`
+- Pending sends render via a `LocalEchoUpdated` strip (chronological local echo never enters thread timelineSets)
+- Deep links to thread events redirect into the panel
+- Files: `features/room/thread/*`, `state/room/thread.ts`, `hooks/useThreadSummary.ts` (+35 tests across the stack)
+
+---
+
 ## Presence
 
 ### Discord-Style Presence Selector
@@ -1045,6 +1209,71 @@ The `useAuthentication` parameter was previously mispositioned, causing unauthen
 
 The `encUrlPreview` setting defaults to `true` rather than `false`. A security advisory chip in **Settings → Privacy** explains the tradeoff (the homeserver can see which URLs are being previewed) so users can make an informed choice.
 
+### Hardened Session Storage (N97 partial, 2026-07)
+
+The session persists as ONE atomic `cinny_session_v1` JSON write (previously ~10 separate localStorage keys written non-atomically). Reads prefer the blob with transparent migration from the legacy keys (dual-written one release for rollback). Cross-tab sync: logging out or in from one tab reloads the others so no tab runs with stale credentials. `state/sessions.ts` (22 tests), `hooks/useSessionSync.ts`.
+
+### Crypto Diagnostics (E2EE investigation kit)
+
+**Settings → Developer Tools → Crypto Diagnostics**: a capture-only ring buffer (max 200) hooks `console.warn/error` for E2EE failure signatures (OTK upload conflicts, missing call media keys, decryption errors, delayed-event timeouts) and downloads a JSON report — the evidence input for the KE-1→4 investigation. Companion runbook: [`LOTUS_E2EE_INVESTIGATION.md`](./LOTUS_E2EE_INVESTIGATION.md). `utils/cryptoDiagLog.ts`, `features/settings/developer/CryptoDiagnostics.tsx`.
+
+---
+
+## Desktop App Features
+
+Native capabilities of the Lotus Chat **Tauri v2** desktop app (Windows, macOS, Linux) on top of the shared web client. Web hooks live in `src/app/hooks/useTauri*.ts` (each no-ops in the browser) and call Rust commands in `cinny-desktop/src-tauri/src/native/*`. Windows-only pieces are `#[cfg(target_os = "windows")]`, compile-verified in CI (Windows runners).
+
+### Call Continuity — No-Sleep (P5-46)
+
+Holds the system awake (`SetThreadExecutionState`) while a voice/video call is active; releases on end. `useTauriCallPower` ↔ `native/power.rs`.
+
+### Windows Jump List (P5-36)
+
+Right-click the taskbar icon → a **Recent Rooms** list of your most-active rooms; each entry opens that room via the `matrix:` deep-link. `useTauriJumpList` ↔ `native/jumplist.rs` (`ICustomDestinationList`).
+
+### Taskbar Thumbnail Toolbar (P5-44)
+
+Hover the taskbar preview during a call → **Mute / Deafen / End Call** buttons. `useTauriThumbbar` ↔ `native/thumbbar.rs` (`ITaskbarList3` + a window subclass for `THBN_CLICKED`).
+
+### System Media Transport Controls — SMTC (P5-43)
+
+Exposes call status + a mute control to the Windows volume-flyout / media overlay (WinRT `SystemMediaTransportControls`). `useTauriSmtc` ↔ `native/smtc.rs`. _Experimental — may require an active audio session to surface._
+
+### Network Awareness (P5-49)
+
+Detects Windows connectivity changes (`INetworkListManager`) and nudges the Matrix client to reconnect (`retryImmediately`). `useTauriNetwork` ↔ `native/network.rs`.
+
+### Instant Background Sync (P5-42)
+
+Keeps the `/sync` loop + notifications running full-speed while the app is closed to the tray, by disabling Chromium background throttling via WebView2 `additional_browser_args` (`lib.rs`) — no separate background process. Windows/WebView2 only; doesn't block system sleep.
+
+### Native Rich Notifications (P5-41 / P5-35)
+
+Windows toasts with **click-to-open-room** and **inline quick reply** (WinRT `ToastNotification`, in-process `Activated` event). Falls back to the standard toast otherwise. `useTauriToastActions` ↔ `native/toast.rs`; the desktop notification bridge routes room notifications to it.
+
+### Focus Assist Sync (P5-56)
+
+When Windows Focus Assist / Quiet Hours is active, Lotus suppresses its own notifications + sounds (reuses the quiet-hours gate). `useTauriFocusAssist` + `focusAssistActiveAtom` ↔ `native/focus_assist.rs` (`SHQueryUserNotificationState`).
+
+### Custom Window Chrome (P5-47)
+
+Opt-in (Settings → General → **Custom Window Chrome**): replaces the OS title bar with a TDS-styled titlebar (min / max / close + drag region), runtime-reversible via `set_decorations`. `features/desktop/TitleBar.tsx` + `useTauriWindowChrome` ↔ `native/chrome.rs`.
+
+### Proactive Update Toast (P5-40)
+
+Checks for a new desktop release every 12h and offers a one-click update. `TauriUpdateFeature` (ClientNonUIFeatures) + `useTauriUpdater`.
+
+### Cross-platform composer niceties
+
+- **Composer toolbar drag-reorder (P5-55)** — drag to reorder the composer buttons (Settings → General), via `@atlaskit/pragmatic-drag-and-drop`.
+- **Draft-saved indicator (P5-57)** — a subtle cue in the composer when the current room has a persisted draft.
+- **Recursive folder drag-drop (P5-48)** — drop a folder to upload every file inside it (all nesting levels), `utils/fileEntries.ts`.
+
+### Files
+
+- Web: `src/app/hooks/useTauri*.ts`, `src/app/components/TauriDesktopFeatures.tsx`, `src/app/features/desktop/TitleBar.tsx`, `src/app/features/room/DraftIndicator.tsx`, `src/app/utils/fileEntries.ts`, `src/app/state/{customWindowChrome,focusAssist}.ts`.
+- Native (`cinny-desktop`): `src-tauri/src/native/{power,jumplist,thumbbar,smtc,network,chrome,toast,focus_assist}.rs` + `native/mod.rs` (registered in `lib.rs`).
+
 ---
 
 ## Key Custom Files

LOTUS_TESTING.md

@@ -207,6 +207,125 @@ If any control does nothing, that usually means an EC DOM selector changed — c
 
 ---
 
+## D2. Element Call **fork** — Phase 2 feature sweep (👥 2 people) — `0.20.1-lotus.1`
+
+> The whole EC iframe is now our **self-built fork** (`@lotusguild/element-call-embedded@0.20.1-lotus.1`).
+> Five features are **active** (the host sets their flags / sends their actions); two ship **dormant**.
+> **Confirm you're on the fork first:** EC iframe console prints `Element Call embedded-v0.20.1-lotus.1`
+> (the old build prints `embedded-v0.20.1`). If it says the old version, the web deploy hasn't landed —
+> the fork features won't be present, so don't test D2 yet.
+> For non-dev testers, each item below also states the plain "✅ good if / ❌ tell us if" outcome.
+
+### D2-1. Denoise **in-source** — survives reconnect (fixes A7) ⭐ highest risk (everyone's mic)
+
+Flag: cinny sets `lotusDenoiseSource=1` when ML denoise is selected (the old build-time getUserMedia
+shim is **removed**). This is the single change with the widest blast radius — test deliberately.
+
+- [ ] **Audio flows, no silence** with ML denoise on (baseline, also §D line 204).
+- [ ] **Reconnect (the A7 fix):** in a call with ML denoise on, kill network ~10 s (devtools → Offline)
+      so EC shows "Connection lost / Reconnect", then restore. **Mic still works AND still denoised**
+      afterward, **without** End+rejoin. _(This is the exact bug that was reintroduced then fixed; if it
+      regresses, mic dies on every reconnect.)_
+- [ ] **Mic device switch mid-call** (Settings → change microphone): audio keeps working (same
+      `restart()` path as reconnect).
+- [ ] **Mute → unmute** a few times: audio returns each time.
+- [ ] **Each model** if the picker offers them: `rnnoise` (default), `speex`, `dtln`, `deepfilternet` —
+      each loads + denoises, no silence. (All four are in-source now; DTLN runs at 16 kHz, others 48 kHz.)
+- [ ] **No double-processing:** audio isn't over-suppressed/artifacted (would mean the old shim is still
+      injected alongside the in-source engine).
+- **Rollback if bad for everyone:** revert the cinny deploy commit (restores the shim + `@element-hq` parity).
+
+### D2-2. Speaking + mute indicators from widget **events** (#2)
+
+Flag: `lotusCallState=1`. cinny now reads speaker/mute state from `io.lotus.call_state` events instead of
+scraping EC's DOM (DOM fallback retained). Overlaps **G1**.
+
+- [ ] **Speaking glow** lights the **correct** person when they talk (you, then your friend).
+- [ ] **PiP "All muted" / "You muted" badge** points at the right person and updates on mute/unmute.
+
+### D2-3. Focus camera **during a screenshare** (#4 / A5)
+
+Action: cinny sends `io.lotus.focus_participant` (the DOM `.click()` hack is gone). Overlaps **A5 / G2**.
+
+- [ ] Person A screenshares; Person B camera on; **MemberGlance → Focus camera** on B → B's camera is
+      spotlighted **alongside/over** the shared screen (not ignored).
+- [ ] Camera-**off** target = graceful (no error, no kick out of the screenshare).
+
+### D2-4. In-call avatar decorations (#6) — **NEW, beyond A6**
+
+Action: cinny pushes `io.lotus.decorations`. **A6 only covered the lobby roster** and called in-call EC
+tiles out of scope — that's now in scope.
+
+- [ ] A participant with a **Profile decoration** joins **camera off** → the decoration ring renders on
+      their **in-call video-tile avatar** (inside EC, not just the lobby), correctly sized/positioned.
+- [ ] Decoration tracks the right person across grid/spotlight layout changes; disappears when they leave.
+
+### D2-5. Native transparent background (#5)
+
+Flag: `lotusTransparent=1` (native, replacing the injected `background:none !important`).
+
+- [ ] Call background looks right — host wallpaper/surface shows through; **no** black box, bad
+      see-through, or layout breakage (also covered loosely by §D2 "looks right").
+
+### D2-7. In-Call Soundboard (#3 / P5-15) — 👥 2 people — **NEW**
+
+Flag: `lotusAudioInject=1`. A 🔔 **Soundboard** button now sits in the call controls bar (left group,
+next to the chat button). Clips are user-uploadable and sync across your devices like emoji packs.
+_Prereq:_ Settings → General → Calls → **Soundboard** must be ON (default on).
+
+- [ ] **Upload:** open the soundboard popout → **Upload** → pick a short audio file (mp3/ogg/wav, ≤ 1 MB).
+      It appears as a clip tile. (Too-big / too-many shows an error, doesn't crash.)
+- [ ] **Plays into the call:** with a second person in the call, click a clip. **They hear it**, and
+      **you hear it locally** too. ✅ good if both hear it; ❌ tell us if only one side does.
+- [ ] **Sync:** the uploaded clip shows up on your **other device**/session (account-data sync).
+- [ ] **Delete:** the ✕ on a tile removes it (everywhere, after sync).
+- [ ] **Off switch:** turn Settings → Calls → **Soundboard** off → the call-bar button disappears.
+- [ ] Injecting a clip does **not** mute/interrupt your mic or anyone else's audio.
+
+### D2-8. Call Quality Controls (#7 / P5-31) — 👥 2 people — **NEW**
+
+Action: `io.lotus.set_quality`. User settings in **Settings → General → Calls** (Microphone Bitrate,
+Screenshare Bitrate, Screenshare Framerate; all default **Auto**). Admin caps in **Room Settings →
+General → Voice → Call Quality Caps**.
+
+- [ ] **No regression at Auto:** with everything on **Auto**, calls/screenshare work exactly as before.
+- [ ] **User cap takes effect:** set Microphone Bitrate to **32 kbps**, rejoin/continue a call — audio
+      still flows (thinner is fine). Set Screenshare Framerate to **15 fps** and share your screen — it
+      still shares. ❌ tell us if any setting kills audio/screenshare.
+- [ ] **Applies mid-call:** changing a setting **during** a call takes effect without End+rejoin.
+- [ ] **Room-admin cap (admin needed):** as a room admin, set **Max Microphone Bitrate = 64 kbps** in
+      Room Settings → Voice. A member whose user setting is higher (e.g. 256) should be **clamped to 64**
+      (best-effort/UX — this is client-side; hard server enforcement is a separate follow-up).
+- [ ] Resetting a setting back to **Auto** removes the cap for the rest of the call.
+
+> Soundboard + quality are no longer "dormant" — if either does nothing, grab the **EC iframe console**
+> and check for `io.lotus.inject_audio` / `io.lotus.set_quality` rejections.
+
+### D2-9. Call Permissions — HARD server-side, cross-client (👥 2 people, admin) — **NEW**
+
+This is enforced by the `voice-limit-guard` on the server (re-signs the LiveKit JWT), so it applies to
+**every** client, not just Lotus Chat. Set in **Room Settings → General → Voice → Call Permissions**.
+_(Requires the guard deployed on LXC 151 — auto-deploys on a `matrix` repo push.)_
+
+- [ ] **Disable screenshare:** as admin, turn **Allow Screen Sharing** off. In a call, the
+      **screenshare button disappears** in Lotus Chat. ✅ good if no one can screenshare.
+- [ ] **Cross-client (the important one):** have someone join the **same room from stock Element / Element
+      X** and try to screenshare → the server **refuses** the track (it won't publish). This proves it's
+      not just our client hiding a button.
+- [ ] **Audio-only room:** turn **Allow Camera** off too → the camera button disappears and cameras are
+      server-blocked for all clients; **microphones still work**.
+- [ ] **⭐ Live kill (mid-call):** while someone is **actively screensharing**, an admin turns **Allow
+      Screen Sharing** off. Within a few seconds their screenshare should **stop for everyone** on its own
+      (no rejoin needed) — this is the server reconcile loop revoking it live. Works even if the sharer is
+      on stock Element. ✅ good if the share drops within ~3–5 s; ❌ tell us if it keeps going.
+- [ ] **Turning it back on** restores the ability to screenshare/camera (start a new share).
+- [ ] **No policy = no change:** a room with Call Permissions left on defaults behaves exactly as before.
+
+> If any D2 item fails, grab the **EC iframe console** (right-click the call → inspect the iframe) — a
+> widget-action/payload mismatch shows up there as a `io.lotus.*` rejection or a `MissingKey`/transport log.
+
+---
+
 # Backlog of previously-fixed-but-unverified items
 
 > Sections A–D above are **this session's** work. Everything below was fixed in earlier waves and is still flagged **⚠️ UNTESTED** in `LOTUS_BUGS.md` / `LOTUS_TODO.md`. They're grouped by what kind of environment you need (mobile, desktop, screen reader, etc.) so you can knock out a whole category at once. None of these are urgent the way A–D are; do them as you have the right device handy.

LOTUS_TODO.md

@@ -48,6 +48,9 @@ Built and gate-green; verify per [LOTUS_TESTING.md](./LOTUS_TESTING.md), then th
 | Desktop — proactive update notifications (Tauri)                                  | J1                |
 | Remind Me Later                                                                   | K1                |
 | Mobile Bookmarks access                                                           | E5                |
+| In-Call Soundboard (P5-15, uploadable clips → real call inject)                   | D2-7              |
+| Call Quality Controls (P5-31, user + room-admin caps)                             | D2-8              |
+| Call Permissions (P5-31, hard server-side screenshare/camera policy)              | D2-9              |
 
 ---
 
@@ -72,32 +75,32 @@ Status: `[ ]` pending · `[~]` in progress · `[x]` completed
 
 ### Confirmed facts
 
-| Finding                                                                                                                                             | Impact                                                                         |
+| Finding                                                                                                                                                  | Impact                                                                                                  |
-| --------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------ |
+| -------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
-| **MSC flags ON:** `msc4140` · `msc3771` · `msc3440.stable` · `msc4133.stable` · `simplified_msc3575` · `msc4222` · `msc3266` · `msc3401_matrix_rtc` | All safe to use now                                                            |
+| **MSC flags ON:** `msc4140` · `msc3771` · `msc3440.stable` · `msc4133.stable` · `simplified_msc3575` · `msc4222` · `msc3266` · `msc3401_matrix_rtc`      | All safe to use now                                                                                     |
-| **MSC flags OFF:** `msc4306` (thread subscriptions) · `msc3882` · `msc3912` · `msc4155`                                                             | These features are BLOCKED                                                     |
+| **MSC flags OFF:** `msc4306` (thread subscriptions) · `msc3882` · `msc3912` · `msc4155`                                                                  | These features are BLOCKED                                                                              |
-| **MSC3266** room summary: flag `msc3266_enabled: true` set but `GET /v1/rooms/{id}/summary` still returns 404 (M_UNRECOGNIZED)                      | Room Preview BLOCKED — endpoint not implemented in Synapse 1.155               |
+| **MSC3266** room summary: flag `msc3266_enabled: true` set but `GET /v1/rooms/{id}/summary` still returns 404 (M_UNRECOGNIZED)                           | Room Preview BLOCKED — endpoint not implemented in Synapse 1.155                                        |
-| **MSC3892** relation redaction: not in flags                                                                                                        | Reaction Redaction feature BLOCKED                                             |
+| **MSC3892** relation redaction: not in flags                                                                                                             | Reaction Redaction feature BLOCKED                                                                      |
-| **MSC4260** report user: `POST /_matrix/client/v3/users/{userId}/report` returns **200** ✅                                                         | **Report User UNBLOCKED** — endpoint live since Synapse 1.133; ready to build  |
+| **MSC4260** report user: `POST /_matrix/client/v3/users/{userId}/report` returns **200** ✅                                                              | **Report User UNBLOCKED** — endpoint live since Synapse 1.133; ready to build                           |
-| **MSC4151** report room: HTTP 405 on GET = endpoint exists (POST only)                                                                              | Report Room live ✅                                                            |
+| **MSC4151** report room: HTTP 405 on GET = endpoint exists (POST only)                                                                                   | Report Room live ✅                                                                                     |
-| `folds AvatarImage` does NOT accept children                                                                                                        | Add frame/overlay inside `UserAvatar.tsx` itself — optional `frameName` prop   |
+| `folds AvatarImage` does NOT accept children                                                                                                             | Add frame/overlay inside `UserAvatar.tsx` itself — optional `frameName` prop                            |
-| No in-app toast system exists (was)                                                                                                                 | Built `ToastProvider` + Jotai queue; at `App.tsx:65`                           |
+| No in-app toast system exists (was)                                                                                                                      | Built `ToastProvider` + Jotai queue; at `App.tsx:65`                                                    |
-| `useUnverifiedDeviceCount()` hook exists                                                                                                            | `src/app/hooks/useDeviceVerificationStatus.ts:65-106`                          |
+| `useUnverifiedDeviceCount()` hook exists                                                                                                                 | `src/app/hooks/useDeviceVerificationStatus.ts:65-106`                                                   |
-| Voice player: `AudioContent.tsx:44-223`                                                                                                             | Playback rate on hidden `<audio>` at line 217                                  |
+| Voice player: `AudioContent.tsx:44-223`                                                                                                                  | Playback rate on hidden `<audio>` at line 217                                                           |
-| `CallControl.setMicrophone(bool)` at `CallControl.ts:206-212`                                                                                       | For AFK auto-mute                                                              |
+| `CallControl.setMicrophone(bool)` at `CallControl.ts:206-212`                                                                                            | For AFK auto-mute                                                                                       |
-| `CallControl.toggleSound()` at `CallControl.ts:230-251`                                                                                             | Push-to-deafen — just wire a hotkey to this                                    |
+| `CallControl.toggleSound()` at `CallControl.ts:230-251`                                                                                                  | Push-to-deafen — just wire a hotkey to this                                                             |
-| matrix-js-sdk has NO arbitrary profile field methods                                                                                                | Use `mx.http.authedRequest()` for MSC4133                                      |
+| matrix-js-sdk has NO arbitrary profile field methods                                                                                                     | Use `mx.http.authedRequest()` for MSC4133                                                               |
-| Sanitizer (`sanitize.ts`) allows table, div, span, a, code, hr                                                                                      | LFG HTML card is safe locally; test on Element/FluffyChat                      |
+| Sanitizer (`sanitize.ts`) allows table, div, span, a, code, hr                                                                                           | LFG HTML card is safe locally; test on Element/FluffyChat                                               |
-| Sanitizer STRIPS `<math>`/MathML tags                                                                                                               | Math/LaTeX task must also modify sanitizer                                     |
+| Sanitizer STRIPS `<math>`/MathML tags                                                                                                                    | Math/LaTeX task must also modify sanitizer                                                              |
-| Service worker EXISTS at `src/sw.ts`                                                                                                                | Quick-reply task: add `notificationclick` handler                              |
+| Service worker EXISTS at `src/sw.ts`                                                                                                                     | Quick-reply task: add `notificationclick` handler                                                       |
-| `knockSupported()` utility exists at `matrix.ts:376-391`                                                                                            | Knock UX: only need "Request to Join" in `RoomIntro.tsx`                       |
+| `knockSupported()` utility exists at `matrix.ts:376-391`                                                                                                 | Knock UX: only need "Request to Join" in `RoomIntro.tsx`                                                |
-| `KeywordMessages.tsx` already has custom keyword push rules                                                                                         | Full push rule editor: only non-keyword rule types need new UI                 |
+| `KeywordMessages.tsx` already has custom keyword push rules                                                                                              | Full push rule editor: only non-keyword rule types need new UI                                          |
-| `getMatrixToRoom()` in `matrix-to.ts` generates invite URLs                                                                                         | Invite link: just add QR code to room settings                                 |
+| `getMatrixToRoom()` in `matrix-to.ts` generates invite URLs                                                                                              | Invite link: just add QR code to room settings                                                          |
-| Cindy CANNOT inject audio into EC call stream                                                                                                       | In-call soundboard must be redesigned as local-only                            |
+| ~~Cindy CANNOT inject audio into EC call stream~~ **UNBLOCKED by EC fork** — `io.lotus.inject_audio` widget action publishes a clip as a real call track | In-call soundboard CAN now mix into the call (no longer local-only); needs cinny UI to drive the action |
-| Folds uses vanilla-extract in non-TDS, NOT CSS custom properties                                                                                    | Custom accent color: must create new vanilla-extract theme variant dynamically |
+| Folds uses vanilla-extract in non-TDS, NOT CSS custom properties                                                                                         | Custom accent color: must create new vanilla-extract theme variant dynamically                          |
-| Theme presets need ~50 CSS custom properties each                                                                                                   | Significant design work before coding                                          |
+| Theme presets need ~50 CSS custom properties each                                                                                                        | Significant design work before coding                                                                   |
-| `useCallSpeakers.ts` CSS MutationObserver polling                                                                                                   | Visual speaking indicator: TDS ring animation on top of existing data          |
+| `useCallSpeakers.ts` CSS MutationObserver polling                                                                                                        | Visual speaking indicator: TDS ring animation on top of existing data                                   |
-| MSC3489/3672 live location: BOTH false on server                                                                                                    | Live Location BLOCKED                                                          |
+| MSC3489/3672 live location: BOTH false on server                                                                                                         | Live Location BLOCKED                                                                                   |
 
 ---
 
@@ -159,9 +162,17 @@ Status: `[ ]` pending · `[~]` in progress · `[x]` completed
 
 ---
 
-### [ ] P3-8 · Thread Panel (full side drawer)
+### [~] P3-8 · Thread Panel (full side drawer) — IMPLEMENTED (2026-07), ⚠️ AWAITING LIVE QA
 
-**⚠️ LARGEST FEATURE — requires its own planning session before implementation.**  
+Built per the design below (4-agent build + 2-agent review). Gates green (tsc/eslint/build/tests). **Release note: threaded replies no longer render inline in the main timeline — roots show a "N replies" chip that opens the panel.**
+
+**Manual QA checklist (post-deploy):**
+1. Reply in Thread (message menu) → panel opens; send text/upload/emoji into it (appears pending → confirmed)
+2. Reply to a reply inside the panel → event carries `m.thread` + `m.in_reply_to` with `is_falling_back:false`
+3. Main timeline: root + chip only (replies absent); chip count/time updates live; unread badge appears for others' thread replies and clears after viewing the panel
+4. Room badge clears via normal markAsRead even with unread threads (unthreaded receipt)
+5. Reload: partitioning persists; encrypted-room threads decrypt (back-pagination too)
+6. Escape / × closes; mobile = fullscreen panel; switching rooms and back restores the open thread  
 **What:** A right-side drawer for threaded conversations. Currently "Reply in Thread" exists but there is no panel to read or write thread replies.
 
 Features:
@@ -193,22 +204,28 @@ Features:
 
 ## Priority 4 — Specialized, high complexity, or low priority
 
-### [ ] P4-7 · Virtualized Infinite Scroll for Search Results
+### [x] P4-7 · Virtualized Infinite Scroll for Search Results — ALREADY IMPLEMENTED (found 2026-07)
 
 **What:** Replace the manual "load more" button with an automated, virtualized infinite scroll for search results.  
-**Approach:** Utilize `@tanstack/react-virtual` in `MessageSearch.tsx` to handle the `nextToken` automatically as the user scrolls.
+**Status:** Done in a prior session — `MessageSearch.tsx` already uses `useVirtualizer` (~line 336) over the result groups AND auto-fetches the `nextToken` page when the last virtual item scrolls into view (~line 469) via `useInfiniteQuery`. Nothing left to build.
 
 ### [ ] P4-8 · Encrypted Message Search Indexing & Caching
 
 **What:** Implement a persistent local cache for search results, optimized for encrypted rooms.  
 **Approach:** Use `IndexedDB` to store search metadata (event IDs, timestamps) to prevent redundant server-side decryption/fetching.
 
-### [ ] P4-1 · Thread Notification Mode Per-Thread (MSC3771)
+### [~] P4-1 · Thread Notification Mode Per-Thread — IMPLEMENTED (2026-07), ⚠️ AWAITING LIVE QA
 
-**Spec:** MSC3771 (stable). Depends on Thread Panel (#P3-8).  
+**Shipped (Slack-style):** default = **Participating** (notified only for threads you've posted in or where you're @mentioned); per-thread override **All / Mentions-only / Mute** via the bell menu in the thread panel header; modes sync across devices (`io.lotus.thread_notifications` account data, pruned on write). Mute also suppresses the chip badge and subtracts the thread from the room's sidebar badge (client-side). Also fixed the underlying path: thread replies are notified via exactly one handler (room-level `ThreadEvent.NewReply`), with the main-timeline notifier + unread binder thread-guarded, and live badge refresh on `RoomEvent.UnreadNotifications`.
-**What:** Per-thread notification toggle: "All messages" vs "Mentions only". Accessible from the thread panel header. Tracks unread counts separately per thread.  
+
-**[AUDIT REQUIRED]** — Implement after Thread Panel. Requires understanding how the SDK tracks per-thread unread counts.  
+**Manual QA checklist (post-deploy):**
-**Complexity:** Medium (after thread panel exists).
+1. Friend replies in a thread YOU posted in → notification + sound; in a thread you never touched → silent (chip badge only)
+2. @mention in any thread → notified regardless of participation
+3. Set a thread to Mute → no notifications, chip badge gone (bell-mute glyph), room sidebar badge drops by that thread's count
+4. Set to All → every reply notifies; Mentions-only → only @mentions
+5. Second device shows the same per-thread modes (account-data sync)
+6. Room-level Mute still silences everything incl. thread overrides
+**Known caveats:** Mentions-only can under-notify in E2EE rooms (decision runs pre-decryption — same class as the existing notifier); muted-thread badge subtraction is Lotus-only (other clients still count them).
 
 ---
 
@@ -254,7 +271,7 @@ Features:
 - Account mgmt: `settings/account/OidcManageAccount.tsx`.
 - 13 unit tests (discovery/flow/session/cache/callback parsing). All gates green.
   **Awaiting verification (needs a real MSC3861 server — lotusguild is NOT one):** deploy + log into **mozilla.org** (requires adding mozilla to the deployed `config.json` homeserverList + its domains to the CSP `connect-src`/`img-src` — see below), OR run a local `matrix-authentication-service` + Synapse `msc3861` dev loop.  
-  **To enable the mozilla.org test:** add to `matrix/cinny/config.json` homeserverList `"mozilla.org"`, and to the nginx CSP `connect-src`/`img-src`: `https://mozilla.org https://mozilla.modular.im https://chat.mozilla.org https://vector.im`.
+  **Mozilla.org test enablement: ALREADY DEPLOYED (verified 2026-07)** — `matrix/cinny/config.json` homeserverList includes `mozilla.org` and the nginx CSP `connect-src` includes the mozilla/modular/vector domains (`matrix/cinny/nginx.conf:42`). **Nothing blocks the test — just pick mozilla.org on the login screen and complete an OIDC login.**
 
 ---
 
@@ -266,12 +283,17 @@ Features:
 
 ---
 
-### [ ] P5-15 · In-Call Soundboard
+### [~] P5-15 · In-Call Soundboard — IMPLEMENTED (⚠️ awaiting live verification, D2-7)
 
-**What:** Grid of short audio clips playable into the call audio stream via Web Audio API (AudioBufferSourceNode → MediaStreamDestinationNode → mixed with mic). Built-in clips + user-uploadable custom clips (stored as mxc://). Accessible from call controls bar.  
+**What:** Soundboard button in the call controls bar → popout grid of the user's clips; clicking one plays it **into the call** as a real published track (peers hear it) and locally (presser hears it). Clips are **user-uploadable, just like custom emojis/stickers**.  
-**[AUDIT REQUIRED]** Verify the Element Call integration exposes the mic MediaStream for mixing. This is the highest-risk part of this feature.  
+**🔱 [EC-FORK] Fork side + cinny side DONE.** The fork ships `io.lotus.inject_audio` (`LotusWidgetActions.InjectAudio`, allow-listed in `widget.ts`), armed via the `lotusAudioInject=1` flag; it publishes a clip as a separate LiveKit track — a **real** in-call soundboard mixed into the call, not local-only. cinny now drives it.  
-**🔱 [EC-FORK]** Owning the EC source (see [`HANDOFF_ELEMENT_CALL_FORK.md`](./HANDOFF_ELEMENT_CALL_FORK.md)) would unblock real audio-injection — a proper soundboard mixed into the call — which is impossible against the prebuilt bundle today.  
+**Shipped (cinny):**
-**Complexity:** High.
+
+- Clips stored in `io.lotus.soundboard` account data → **synced across devices like emoji/sticker packs** (`useSoundboard` hook; `AccountDataEvent.LotusSoundboard`).
+- Upload audio (≤1 MB, ≤40 clips) → `mx.uploadContent` → mxc; play resolves mxc → authed download → `blob:` object URL (the widget can't fetch authenticated media itself) → `control.injectAudio(url, volume)` + local playback.
+- `CallSoundboard.tsx` popout in the call bar (upload / play / delete), gated on the `soundboardEnabled` setting (Settings → General → Calls, + volume slider).  
+  **Remaining:** a dedicated Settings management page (optional — upload/delete already live in the popout); a small default clip set; live verification (D2-7). Files: `utils/soundboardClips.ts`, `hooks/useSoundboard.ts`, `features/call/CallSoundboard.tsx`, `plugins/call/CallControl.ts#injectAudio`.  
+  **Complexity:** Medium — done.
 
 ---
 
@@ -287,39 +309,55 @@ Features:
 ### [x] P5-30 · Advanced ML Noise Suppression (Krisp-style)
 
 **What:** High-end background noise cancellation using a pre-trained ML model (RNNoise) running in the browser. Removes dogs, fans, and keyboard clicks from the mic stream.  
-**Shipped:** 3-tier setting (Off / Browser-native / ML) in Settings → General → Calls. ML tier injects a same-origin pre-init shim into the vendored Element Call `index.html` that monkeypatches `getUserMedia` and routes the captured mic through an RNNoise `AudioWorklet` before LiveKit publishes — no EC fork required. See LOTUS_FEATURES.md → "Noise Suppression (Advanced Multi-Tier)".  
+**Shipped:** 3-tier setting (Off / Browser-native / ML) in Settings → General → Calls.  
-**🔱 [EC-FORK]** Once we own the EC source (see [`HANDOFF_ELEMENT_CALL_FORK.md`](./HANDOFF_ELEMENT_CALL_FORK.md)), denoise should become a first-class audio stage **inside** EC instead of an `index.html` getUserMedia monkeypatch — more robust, survives reconnects (fixes the A7 mic-after-reconnect bug), and removes the build-time injection hack.  
+**🔱 [EC-FORK] DONE — moved in-source (2026-06).** ML denoise is now a first-class audio stage **inside** the forked Element Call: a LiveKit `TrackProcessor<Audio>` activated by `lotusDenoiseSource=1` (cinny sets it when ML is selected). The old build-time `getUserMedia`/`index.html` monkeypatch is **removed**. Because EC re-runs the processor on every (re)publish, denoise now **survives reconnects and mic-device switches** — this is the A7 fix (see `LOTUS_BUGS.md` A7, `LOTUS_TESTING.md` §D2-1). The processor degrades to the raw mic rather than going silent.  
-**Key decision:** LiveKit's Krisp filter is LiveKit-Cloud-only (we self-host the SFU); EC's own RNNoise PR #3892 is unmerged. The shim is the same post-capture pipeline #3892 uses, executed from the realm we control, so it survives EC version bumps.  
+**Key decision:** LiveKit's Krisp filter is LiveKit-Cloud-only (we self-host the SFU); EC's own RNNoise PR #3892 is unmerged. Owning the fork let us implement the in-source stage directly.
-**AEC note (resolved-as-accepted):** WebAudio capture routing can weaken browser AEC — same tradeoff as EC's upstream feature; mitigated by keeping `echoCancellation`/`autoGainControl` on the raw capture and labeling the tier "beta".
 
-**Model Roadmap (priority order):**
+**Models — all in-source in the fork:**
 
-- [ ] **Verify DTLN** (16 kHz narrowband fix) in a real call before investing further — wired but unverified.
+- [x] **DeepFilterNet 3** (48 kHz, **ML default**) · **DTLN** (16 kHz) · **RNNoise** (48 kHz) · **Speex** (48 kHz) — all four wired and selectable; dropdown ordered best-quality first. Tier default is **Browser-native**.
-- [ ] **DeepFilterNet 3** — best self-hostable upgrade: Rust→WASM, CPU real-time, 48 kHz fullband. Effort: self-host `df_bg.wasm` + DFN3 ONNX model, wire a 48 kHz worklet.
+- [x] **Quality tuning (2026-07):** dry/wet **attenuation floor** (~-16 dB, RNNoise/Speex only — the "robotic" fix; DTLN/DFN would comb-filter), **gate-after-ML**, **DFN level 80→60**. Floor tunable via `lotusDenoiseFloor`.
-- [ ] **Desktop-only / HW-gated:** FRCRN or NVIDIA Maxine (RTX/Tensor only) — impossible in-browser; would run in Tauri Rust backend + bridge a virtual mic into the webview. Must detect capability and only offer on supported hardware; web falls back to RNNoise.
+- [x] **AEC/AGC (2026-07):** echo-cancellation ON; **AGC OFF for the ML tier** (`autoGainControl=false`, threaded through EC `UrlParams`→`ConnectionFactory`) so browser AGC doesn't fight the model; playback confirmed no AEC-defeat.
+- [x] **Reliability (2026-07):** never-silent watchdog, resume-timeout, WASM-cache reject-eviction, activate-off-local-participant, init/build leak fixes.
+- [ ] **Open verification:** real-call by-ear **A/B** — model choice, floor value, AGC on/off (RNNoise known-weak historically). `LOTUS_TESTING.md` §D2-1 / J2.
+- [ ] **GTCRN (RESEARCHED — DEFERRED):** tiny MIT 16 kHz model that beats RNNoise, but **no drop-in browser package** — needs a ~1-week from-scratch build: `onnxruntime-web` (WASM, 1 thread) in a **Web Worker** (ORT can't run in an AudioWorklet — issue #13072) behind a custom AudioWorklet ring-buffer node presenting as an `AudioNode`; model `gtcrn_simple.onnx` (~300 KB, stateful — thread `conv/tra/inter` caches per frame); we write STFT/iSTFT (n_fft 512/hop 256). Assets ~3–4 MB via the `lotusDenoise()` vite plugin. Registration checklist known (both repos, incl. the 2nd `denoisePipeline.ts` used by the DenoiseTester). **Revisit only if low-power quality is insufficient after validating the current tuning.**
+- [ ] **Desktop-only / HW-gated (future):** FRCRN or NVIDIA Maxine (RTX/Tensor only) — impossible in-browser; would run in the Tauri Rust backend + bridge a virtual mic into the webview. Detect capability; web falls back to RNNoise.
 - **Excluded:** Krisp (LiveKit Cloud only); FRCRN/Maxine on web (GPU/server-bound).
 
 ---
 
-### [ ] P5-31 · Granular Voice & Screenshare Quality Controls (Discord-style)
+### [~] P5-31 · Granular Voice & Screenshare Quality Controls — IMPLEMENTED (⚠️ awaiting live verification, D2-8)
 
-**What:** Let users (or room admins via room settings) adjust audio bitrates (e.g., 64kbps to 512kbps) and screenshare quality (resolution: 720p/1080p/Source, framerate: 15/30/60fps).  
+**What:** Let users (and room admins) adjust audio bitrate and screenshare bitrate/framerate.  
-**Note:** Requires tight integration with the LiveKit SFU and custom state events for per-room quality caps.  
+**🔱 [EC-FORK] Fork side + client side DONE.** The fork ships `io.lotus.set_quality` (`LotusWidgetActions.SetQuality`) that applies audio/screenshare encoding params (`RTCRtpSender.setParameters`, all simulcast encodings, re-applied on `TrackUnmuted`/republish) inside EC. cinny now drives it.
-**[AUDIT REQUIRED]** Must verify if current `lk-jwt-service` can be extended with custom bitrate/resolution claims or if a new sidecar (similar to `voice-limit-guard`) is needed for server-side enforcement.  
+
-**Complexity:** Extreme.
+**Shipped (cinny):**
+
+1. **User settings** (Settings → General → Calls): Microphone Bitrate, Screenshare Bitrate, Screenshare Framerate (`callAudioBitrate` / `screenshareBitrate` / `screenshareFramerate`).
+2. **Room-admin caps**: `io.lotus.room_quality` state event (`StateEvent.LotusRoomQuality`) + `RoomQuality.tsx` in Room Settings → General → Voice (mirrors `RoomVoiceLimit`).
+3. **Apply logic**: `useCallQuality` (wired in `CallEmbedProvider`'s `CallUtils`) builds `min(user setting, room cap)` and sends `io.lotus.set_quality` on join / when settings change (`utils/callQuality.ts`, unit-tested).
+
+**Server-side enforcement (DONE — matrix repo):** extended `voice-limit-guard.py` (LXC 151) to also read `io.lotus.room_quality` and hard-enforce a **publish-source policy** for ALL clients.
+
+- **Reality (researched, primary-source, LiveKit 1.9.11):** numeric bitrate/fps caps **cannot** be hard-enforced server-side — LiveKit is a pure SFU (forwards, never transcodes); there is NO bitrate/fps field in the JWT grant, `RoomConfiguration`, server `limit:` config, or any admin RPC, and stock Element Call ignores room metadata / custom claims for publish quality. So numeric caps stay **cooperative** (our fork honors them via `min()` → `set_quality`, already shipped).
+- **What IS hard-enforced cross-client:** `VideoGrant.canPublishSources`. The guard holds the LiveKit secret, so when `io.lotus.room_quality` sets `allow_screenshare:false` / `allow_camera:false` it re-signs the issued JWT with a narrowed source list → the SFU refuses those tracks for **every** client (Element, FluffyChat, our fork). Mic always kept. Fail-open; unit-tested (`livekit/test_voice_limit_guard.py`). Admin UI: Room Settings → Voice → **Call Permissions** switches. cinny also hides the blocked buttons.
+- **Live (mid-call) enforcement — DONE:** the JWT re-sign covers new joins; for participants **already in the call**, a background reconcile loop in the guard calls LiveKit `UpdateParticipant` every ~3 s to narrow `canPublishSources`, which unpublishes an in-progress screenshare/camera **server-side for all clients** and blocks re-publish (verified LiveKit 1.9.11 auto-unpublishes on permission narrowing). Only removes forbidden sources (never grants), preserves other permission flags, no-ops once compliant. So flipping a room audio-only kills live cameras/screenshares within ~one interval.
+- **Not enforceable / deferred:** numeric server enforcement (impossible — see above); screenshare **resolution** control (`set_quality` covers bitrate + framerate; resolution needs a `getDisplayMedia` hook inside the fork).
+
+**Complexity:** DONE — client (cooperative numeric caps) + server (hard publish-source policy). Only the physically-impossible numeric server enforcement is out of scope.
 
 ---
 
-### [ ] P5-35 · Desktop — Notification Click Opens Room (DEFERRED)
+### [~] P5-35 · Desktop — Notification Click Opens Room — IMPLEMENTED (Tier B, via the P5-41 WinRT toast: click → open room, reply → send); native CI-compile-pending, runtime-verify on Windows
 
 **What:** Clicking a system tray notification navigates to the relevant room. Quick-reply from the notification toast would send the reply without opening the window.  
-**Status:** Deferred — `tauri-plugin-notification` has no Rust click/action callback API. Quick-reply would need a custom WinRT toast activator + COM registration, which can't be compile-tested without a Windows build environment.  
+**Status:** Deferred (Tier B). Note: the "can't compile-test without a Windows build environment" premise is **outdated** — CI now compiles Windows (Gitea self-hosted `windows` runner + GitHub `windows-latest`), and `windows`-crate/COM code already ships (e.g. `set_badge_count`, and the Tier A jump list). This still depends on P5-41 (the WinRT toast + custom activator), so it rides with that; it was not part of the Tier A wave.  
 **Note:** Tray icon and `matrix:` deep links already bring the window forward on most interactions. Revisit when tauri-plugin-notification gains click handler support upstream.  
 **Complexity:** High (platform-specific native code required).
 
 ---
 
-### [ ] P5-36 · Desktop — Windows Jump List (DEFERRED)
+### [~] P5-36 · Desktop — Windows Jump List — IMPLEMENTED (Tier A); native CI-compile-pending, runtime-verify on Windows
 
 **What:** Right-clicking the taskbar icon shows a jump list with recent/favorite rooms for quick navigation.  
 **Status:** Deferred — implementing the Windows COM jump list API in Tauri requires iterating on C++/COM code that can only be compile-checked on Windows, making blind CI iteration impractical.  
@@ -328,78 +366,86 @@ Features:
 
 ---
 
-### [ ] P5-41 · Desktop — Native WinRT Toast Notifications
+### [~] P5-41 · Desktop — Native WinRT Toast Notifications — IMPLEMENTED (Tier B; ToastNotification + reply input + in-process Activated; falls back to tauri-plugin-notification); native CI-compile-pending. Runtime needs a Start-menu shortcut + matching AppUserModelID to surface
 
 **What:** Replace emulated notifications with native WinRT Toast notifications.  
 **Approach:** Implement native WinRT Toast integration using `windows-rs` to enable full Action Center integration, including native Quick Reply functionality.
 
-### [ ] P5-42 · Desktop — Persistent Background Sync
+### [~] P5-42 · Desktop — Persistent Background Sync — IMPLEMENTED (Batch 3, pragmatic keep-alive); native CI-compile-pending, runtime-verify on Windows
 
-**What:** Maintain light connection to homeserver when WebView2 is suspended.  
+**What:** Keep receiving messages/notifications instantly while the app is closed to the tray.  
-**Approach:** Implement a headless Rust sidecar to fetch unread counts/notifications while the webview is suspended to ensure instant notification delivery.
+**Shipped approach (80/20):** rather than a multi-sprint headless Rust sync client, disable Chromium background throttling via WebView2 `additional_browser_args` (`--disable-background-timer-throttling --disable-renderer-backgrounding --disable-backgrounding-occluded-windows`, added to the existing Tauri default args) so the existing JS Matrix `/sync` loop keeps running full-speed in the tray. Windows/WebView2 only; does not block system sleep. See `cinny-desktop/src-tauri/src/lib.rs` (WebviewWindowBuilder).  
+**Deferred (not needed):** the full headless Rust sidecar — only revisit if WebView2 ever hard-suspends despite these flags (would require a second Matrix client with its own /sync + push-rule eval + E2EE-aware notification content).
 
-### [ ] P5-43 · Desktop — System Media Transport Controls (SMTC)
+### [~] P5-43 · Desktop — System Media Transport Controls (SMTC) — IMPLEMENTED (Tier A); CI-compile-pending; SMTC may need an active media/audio session to surface — verify on Windows
 
 **What:** Integrate with Windows SMTC for volume flyout call/media control.  
 **Approach:** Use Windows SMTC API to expose call status, mic mute/unmute, and media controls to the Windows volume flyout/media overlay.
 
-### [ ] P5-44 · Desktop — Taskbar Thumbnail Toolbar
+### [~] P5-44 · Desktop — Taskbar Thumbnail Toolbar — IMPLEMENTED (Tier A); native CI-compile-pending, runtime-verify on Windows
 
 **What:** Add persistent call controls to the taskbar preview.  
 **Approach:** Implement a COM thumbnail toolbar in the application preview window, featuring Mute/Deafen/End Call buttons.
 
-### [ ] P5-46 · Desktop — System Power Management (Call Continuity)
+### [~] P5-46 · Desktop — System Power Management (Call Continuity) — IMPLEMENTED (Tier A reference); web verified; native CI-compile-pending (Windows only; macOS/Linux no-op TODO)
 
 **What:** Prevent system sleep/hibernate during active calls.  
 **Approach:** Use Tauri/Rust `power-manager` or platform-specific APIs to block system power saving states while a voice/video session is active.
 
-### [ ] P5-47 · Desktop — TDS-Styled Native Window Chrome
+### [~] P5-47 · Desktop — TDS-Styled Native Window Chrome — IMPLEMENTED (Tier A, OPT-IN/default-off, runtime-reversible); web verified; native CI-compile-pending
 
 **What:** Replace system titlebar with custom Lotus TDS chrome.  
 **Approach:** Configure Tauri window (`decorations: false`) and implement custom, TDS-token compliant titlebar controls (Close/Max/Min) for a cohesive UI.
 
-### [ ] P5-48 · Desktop — Native File System Drag-and-Drop Improvements
+### [~] P5-48 · Desktop — Native File System Drag-and-Drop Improvements — IMPLEMENTED (recursive folder upload, web-verified: tsc/build/tests). SCOPED-OUT: `.lnk` shortcut resolution (webview never exposes a dropped file's OS path → native can't resolve the target) and "Send To" (installer/registry shell integration) — deferred
 
 **What:** Enhance drag-and-drop support for Windows.  
 **Approach:** Improve handling for Windows file shortcuts, recursive folder uploads, and shell-integrated "Send To" context menu actions.
 
-### [ ] P5-49 · Desktop — Network Awareness (NCSI Integration)
+### [~] P5-49 · Desktop — Network Awareness (NCSI Integration) — IMPLEMENTED (Tier A; INetworkListManager poll → mx.retryImmediately); native CI-compile-pending, runtime-verify on Windows
 
 **What:** Proactively detect Windows network connectivity changes.  
 **Approach:** Integrate with the Windows Network Connectivity Status Indicator (NCSI) API to improve offline mode transition latency and network recovery.
 
-### [ ] P5-50 · Desktop — Windows Hardware-Accelerated Media Pipeline
+### [WON'T FIX] P5-50 · Desktop — Windows Hardware-Accelerated Media Pipeline
 
 **What:** Replace standard browser decoding with native Windows Media Foundation.  
-**Approach:** Leverage DirectShow/Media Foundation to offload video/audio decoding from the CPU to the GPU, significantly reducing power consumption and latency during calls.
+**Why won't-fix (researched):** WebRTC media (the call pipeline) lives entirely inside WebView2/Chromium — you cannot inject Media Foundation/DirectShow into WebRTC's decode path from the Tauri host. Chromium already uses the platform's hardware decoders (D3D11VA/MF) where the GPU supports the codec, so there is no separate CPU pipeline to offload. Not actionable as described.
 
-### [ ] P5-51 · Desktop — Federated "Identity Contexts" (Isolation Manager)
+### [DEFERRED] P5-51 · Desktop — Federated "Identity Contexts" (Isolation Manager)
 
-**What:** Compartmentalize sessions, local databases, and caches into isolated "Contexts."  
+**What:** Compartmentalize sessions, local databases, and caches into isolated "Contexts" (e.g. Work vs. Personal) with a zero-leak boundary.  
-**Approach:** Implement a zero-leak boundary for personas (e.g., Work vs. Personal) by isolating `IndexedDB`, filesystem caches, and session persistence per context.  
+**Decision:** Deferred (reviewed 2026-07). Multi-sprint, and it touches the auth/crypto/storage core — not worth the risk/effort for a niche need right now. Kept here with a concrete spec so it's actionable later.
+
+**Future-work spec (why it's big):** the app is currently **single-session**.
+- Session lives in `src/app/state/sessions.ts` under fixed localStorage keys — `cinny_access_token`, `cinny_device_id`, `cinny_user_id`, `cinny_hs_base_url`, plus the OIDC keys (`cinny_refresh_token`, `cinny_expires_at`, `cinny_oidc_*`).
+- Persistence lives in `src/client/initMatrix.ts`: two fixed IndexedDB stores — `web-sync-store` (`IndexedDBStore`) and `crypto-store` (`IndexedDBCryptoStore`) — feeding one `createClient(...)`.
+
+True per-context isolation would require: (1) namespace every localStorage key per context (`ctx:<id>:cinny_*`); (2) per-context IndexedDB dbNames for **both** the sync store and the crypto store; (3) a context registry + switcher UI (create/rename/delete/switch); (4) full client teardown + re-init on switch (`initMatrix` currently assumes one global client); (5) per-context settings + notification/quiet-hours state; (6) careful crypto-store isolation so device keys never bleed across contexts. **Smaller intermediate step** if demand appears: plain multi-account (fast account switch) *without* the hard isolation boundary — much less risky, reuses most of the login flow.  
 **Priority:** Extreme Low (Multi-sprint/Architectural).
 
-### [~] P5-52 · Desktop — Room-Level Sync Governor (Performance Control) [STILL_CONSIDERING]
+### [DROPPED] P5-52 · Desktop — Room-Level Sync Governor (Performance Control)
 
-**What:** Granular sync tuning for individual rooms.  
+**What:** Granular per-room sync tuning (frequency, event-type filtering).  
-**Approach:** Allow per-room overrides for sync frequency and event type filtering (e.g., disable read receipts/typing in heavy rooms) to optimize performance. Implementation requires careful UX to prevent complexity fatigue.
+**Why dropped (reviewed 2026-07):** matrix-js-sdk can't do **true** per-room sync filtering — all room events still come down the single `/sync` stream, so "disable typing/receipts in heavy rooms" can only be a **cosmetic client-side hide**, not an actual performance/bandwidth win. That, plus the UX-complexity risk flagged originally, makes it not worth building. If per-room quieting is ever wanted, add a simple "mute typing & receipts in this room" toggle to normal room settings — not a "governor."
 
-### [ ] P5-53 · Desktop — Local-Only "Scripting" Plugin System (Tampermonkey-like)
+### [DEFERRED] P5-53 · Desktop — Local-Only "Scripting" Plugin System (Tampermonkey-like)
 
 **What:** A sandboxed environment for local execution of user scripts on Matrix events.  
-**Approach:** Implement a WASM-based execution engine that allows users to write local-only, client-side scripts to interact with incoming Matrix events, trigger sounds/notifications, or inject custom UI elements based on event payload rules. Designed for privacy — all logic runs exclusively on the local machine.
+**Decision:** Deferred (reviewed 2026-07). A full WASM execution engine + script registry + management UI + security model is a large surface for a very small (power-user) audience.  
+**Recommended lighter alternative (the ~80/20) if we ever want event automation:** a built-in **automation-rules** feature — declarative "when an incoming event matches X (room / sender / keyword / type) → notify / play sound / highlight / auto-react" rules, configured in Settings. Covers the realistic use cases (custom alerts, keyword pings) with **no arbitrary code execution**, so no sandbox/security burden. Build that instead of a scripting engine if the need arises.
 
-### [ ] P5-55 · Desktop — Composer Toolbar Drag-and-Drop Reordering
+### [~] P5-55 · Desktop — Composer Toolbar Drag-and-Drop Reordering — IMPLEMENTED (Tier A); web-verified (tsc/build/tests). Awaiting live UX check
 
 **What:** Allow users to reorder toolbar icons via drag-and-drop.  
 **Approach:** Extend the current settings-based toolbar toggle system to include a drag-and-drop UI mode in the composer settings, allowing users to personalize their icon order.
 
-### [ ] P5-56 · Desktop — Windows "Focus Assist" (DND) Sync
+### [~] P5-56 · Desktop — Windows "Focus Assist" (DND) Sync — IMPLEMENTED (Tier B; SHQueryUserNotificationState poll → suppresses notifications+sounds via the quiet-hours gate); native CI-compile-pending, runtime-verify on Windows
 
 **What:** Automatically toggle notification state based on Windows Focus Assist.  
 **Approach:** Integrate with the Windows `NotificationCenter` / `Focus` state via Tauri/Rust to automatically enable/disable Lotus Chat's internal notification suppression mode when Windows Focus Assist is toggled.
 
-### [ ] P5-57 · Desktop — Visual Draft Persistence Indicator
+### [~] P5-57 · Desktop — Visual Draft Persistence Indicator — IMPLEMENTED (Tier A); web-verified. Awaiting live UX check
 
 ---
 
@@ -450,9 +496,9 @@ Check back after each Synapse upgrade — re-run `/matrix/client/versions` and `
 
 ## Pending Audits
 
-### [ ] Audit-3 · Profile banner image — Matrix protocol support
+### [DEFERRED] Audit-3 · Profile banner image — Matrix protocol support — RESEARCHED (2026-07)
 
-Research whether Matrix spec or MSC4133 (v1.16) defines a standard profile banner field. `uk.tcpip.msc4133.stable = true` on our server — check if a `banner_url` or similar field is defined. If no cross-client standard exists, do not implement.
+**Finding:** [MSC4427 — Custom banners for user profiles](https://github.com/matrix-org/matrix-spec-proposals/pull/4427) defines a `banner_url` profile field on top of the MSC4133 extensible-profile system (which our server supports, `uk.tcpip.msc4133.stable = true`, and which became stable in Matrix v1.16). However MSC4427 is an **open proposal, not merged** — no cross-client standard yet, so per this item's own rule: do not implement. **Revisit when MSC4427 merges** (implementation would then be small: read/write the field via the MSC4133 profile API + render a banner in UserHero/profile popouts).
 
 ---
 
@@ -460,26 +506,35 @@ Research whether Matrix spec or MSC4133 (v1.16) defines a standard profile banne
 
 Exhaustive, low-level implementation details for backlog items. Follow these patterns to ensure code is "Lotus-perfect" (idiomatic, performant, and TDS-compliant).
 
-### P3-8 · Thread Panel (Full Side Drawer)
+### P3-8 · Thread Panel (Full Side Drawer) — 🟢 FULL DESIGN (2026-07, ready to execute)
 
-**Architecture:** Mirror the `MembersDrawer` pattern but with a specialized timeline.
+**Decisions (each backed by SDK evidence in node_modules/matrix-js-sdk):**
 
-- **State (`src/app/state/room/thread.ts`):**
+| Question | Decision |
-  ```typescript
+|---|---|
-  export const activeThreadIdAtom = atom<string | null>(null);
+| Thread rendering | **New lean `ThreadTimeline`** reusing `Message`, `useVirtualPaginator`, and RoomTimeline's exported timeline helpers (lines 156-227). Do NOT refactor 2214-line RoomTimeline (its ~35 hooks are hardwired to the room live timeline). |
-  ```
+| threadSupport | **Enable `threadSupport: true`** in `initMatrix.ts` (~line 39). ⚠️ Thread replies then LEAVE the main timeline (`room.js eventShouldLiveIn` → `shouldLiveInRoom:false`), retroactively on reload — MUST ship the "N replies" summary chip in the same release. Roots stay in both timelines. |
-- **Layout (`src/app/features/room/Room.tsx`):** Insert `ThreadPanel` conditionally alongside `RoomTimeline`:
+| State | `roomIdToActiveThreadIdAtomFamily` (per-room, mirrors `roomIdToReplyDraftAtomFamily`) in new `state/room/thread.ts` + `getThreadDraftKey(roomId, threadRootId)` = `` `${roomId}::${threadRootId}` `` |
-  ```tsx
+| Composer | **Reuse RoomInput**: add optional `threadRootId` prop; scope its 3 atom-family lookups by draftKey (isolates thread drafts from the main composer); pass `threadRootId ?? null` at all 7 `mx.sendMessage/sendEvent` call sites — the SDK's `addThreadRelationIfNeeded` then emits spec-correct `m.thread` relations incl. reply-in-thread. Separate `useEditor()` instance in the panel. Hide schedule + commands in thread mode v1. |
-  {
+| Unreads | v1 = unread badge on the summary chip (`room.getThreadUnreadNotificationCount` — counts already synced independent of threadSupport) + `markThreadAsRead` threaded receipt when panel open at bottom. |
-    activeThreadId && (
+| Mobile | Pure CSS like `MembersDrawer.css.ts`: fixed width toRem(360) desktop, `position:fixed; inset:0` under 750px. |
-      <>
+
-        <Line variant="Background" direction="Vertical" size="300" />
+**Critical side-effect fixes (one-liners, land FIRST):**
-        <ThreadPanel roomId={roomId} threadId={activeThreadId} />
+1. `initMatrix.ts` → `threadSupport: true`.
-      </>
+2. `utils/notifications.ts:24` → `sendReadReceipt(latestEvent, type, /*unthreaded*/ true)` — otherwise markAsRead becomes `main`-scoped and room badges stick permanently unread (room unread total includes thread counts).
-    );
+
-  }
+**Known SDK traps (verified):**
-  ```
+- **Local echo gap:** chronological pending ordering means the thread timelineSet never receives pending events (`canContain` rejects; `room.getPendingEvents()` THROWS in this mode) — ThreadTimeline must render its own pending strip via `RoomEvent.LocalEchoUpdated` filtering on `threadRootId`, deduped against `thread.findEventById`.
-- **Component (`src/app/features/room/thread/ThreadPanel.tsx`):** Use `room.getThread(threadId)` from the SDK. Render a `Header` with a "Close" button that sets `activeThreadIdAtom` to `null`. Reuse `RoomTimeline` but pass a filtered `EventTimelineSet`. Use `thread.timelineSet` directly for the most accurate thread view.
+- **Bootstrap:** `room.getThread(id) ?? room.createThread(id, room.findEventById(id), [], false)` — the SDK auto-fetches via `/relations` and inserts the root at top; gate rendering on `thread.initialEventsFetched`; decrypt with `decryptAllTimelineEvent` after init + each pagination.
+- **Deep links:** `getEventTimeline(mainSet, threadEventId)` returns undefined for thread events — redirect jump-to-event to the panel (best-effort v1).
+- **Summary chip** must render from the server-aggregated bundle (`unsigned['m.relations']['m.thread']`) so it works before any Thread object exists.
+- Room-list "latest message" preview may show the root, not the newest reply — cosmetic, accept v1.
+
+**File inventory — new:** `state/room/thread.ts` (+test), `features/room/thread/{useThread.ts, threadSummary.ts(+test), ThreadTimeline.tsx(+css), ThreadPanel.tsx(+css), ThreadSummary.tsx, index.ts}`, `hooks/useThreadSummary.ts`. **Edited:** `initMatrix.ts` + `utils/notifications.ts` (coordinator, step 0), `RoomInput.tsx` (threadRootId prop), `RoomTimeline.tsx` (handleReplyClick startThread → open panel; ThreadSummary chips at the two Message call sites; Reply onThreadClick; deep-link redirect), `components/message/Reply.tsx`, `Room.tsx` (render panel after MediaGallery block, gated `!callView && activeThreadId`, `key={roomId+threadId}`).
+
+**4-agent partition:** step 0 (coordinator one-liners) → A: state+SDK glue (+tests) · B: ThreadTimeline (largest; copies the `useTimelinePagination` pattern rather than exporting it) · C: RoomInput changes · D: panel shell + RoomTimeline/Reply integration — all parallel against pinned interface contracts → coordinator wires Room.tsx + gates.
+
+**Verification:** gates (tsc/eslint/build/tests) + post-merge manual QA: open thread via chip/menu/indicator; pending→confirmed echo; `is_falling_back:false` on reply-in-thread; main timeline shows root+chip only; badge clears; reload keeps partitioning; encrypted threads decrypt. **Release note required:** threaded replies no longer render inline in the main timeline.
 
 ---
 
@@ -540,7 +595,7 @@ Exhaustive, low-level implementation details for backlog items. Follow these pat
 
 > ⚠️ **[Gemini_Found — CORRECTED]** Gemini originally suggested using LiveKit's `LocalAudioTrack.replaceTrack()` to mix audio into the call stream. This is **not possible** from Lotus Chat's realm: Element Call runs in a **cross-origin iframe** controlled via `matrix-widget-api` (postMessage). LiveKit's JS SDK and its `LocalAudioTrack` live inside EC's sandboxed context — inaccessible from our code. This directly contradicts the confirmed constraint already listed in the Server Capabilities table: _"Cindy CANNOT inject audio into EC call stream — In-call soundboard must be redesigned as local-only."_ The soundboard must be a local-playback-only feature (output through the user's speakers, not mixed into the call audio stream).
 >
-> 🔱 **[EC-FORK — partial correction]** The "cross-origin" claim above is **outdated**: EC is now **same-origin** / self-hosted (`iframe.sandbox` has `allow-same-origin`; we read `contentDocument`). The _practical_ blocker still holds — LiveKit's `LocalAudioTrack` lives in EC's **module scope** (not on `window`), so it's unreachable from cinny even same-origin. **Owning the EC source** (see [`HANDOFF_ELEMENT_CALL_FORK.md`](./HANDOFF_ELEMENT_CALL_FORK.md)) is the path to a real call-audio-inject API, which would unblock a true in-call soundboard.
+> 🔱 **[EC-FORK — RESOLVED]** Both the original claim and the earlier "practical blocker still holds" correction are now **outdated**. EC is same-origin **and** we own the source, so we no longer reach into EC's module scope from cinny — instead the fork **exposes the inject point itself**: the `io.lotus.inject_audio` widget action (`LotusWidgetActions.InjectAudio`) publishes a clip as a separate LiveKit track from inside EC. A **real** in-call soundboard (mixed into the call, not local-only) is therefore unblocked, and the cinny-side soundboard UI is now **built** (P5-15 above): uploadable clips played into the call via this action, stored in `io.lotus.soundboard` account data.
 
 ---
 
@@ -611,7 +666,7 @@ See shipped implementation in LOTUS_FEATURES.md → "Noise Suppression (Advanced
 
 ---
 
-### P5-40 · Desktop — Proactive Update Notifications (Tauri)
+### [x] P5-40 · Desktop — Proactive Update Notifications (Tauri) — DONE (already shipped: `TauriUpdateFeature` in ClientNonUIFeatures.tsx polls every 12h + fires the sticky update toast)
 
 **Key Files:** `src/app/hooks/useTauriUpdater.ts`, `src/app/pages/client/ClientNonUIFeatures.tsx`, `src/app/features/toast/LotusToastContainer.tsx`.
 

README.md

@@ -18,6 +18,8 @@ The Lotus Chat logo (`public/res/Lotus.png`) is a derivative work based on the o
 
 ### Messaging
 
+- Threads: reply in a thread and read/write the whole conversation in a side panel — root messages show a "N replies" chip with an unread badge (threaded replies live in the panel now, not inline in the room)
+- Slack-style thread notifications: by default you're only pinged for threads you're in or where you're @mentioned; set any thread to All / Mentions-only / Mute from the panel's bell menu (muted threads stop bumping badges; syncs across devices)
 - See who has read each message, and track delivery status (sending / sent / failed)
 - Bookmark any message and revisit saved messages from the sidebar
 - Schedule messages to send at a specific time
@@ -33,6 +35,8 @@ The Lotus Chat logo (`public/res/Lotus.png`) is a derivative work based on the o
 - Search for and send GIFs from a built-in GIF picker
 - Control voice message playback speed: 0.75× / 1× / 1.5× / 2×
 - Search messages with a date range filter
+- Optional persistent search index for encrypted rooms (off by default — stores decrypted text on your device; clearable, wiped on logout)
+- Write math with LaTeX: `$inline$` and `$$block$$` render via KaTeX (spec `data-mx-maths` supported)
 - Room topics support rich formatting (bold, links, italics)
 - Deleted messages show a placeholder instead of disappearing
 - Code blocks highlight syntax for JS/TS, Python, and Rust
@@ -52,6 +56,9 @@ The Lotus Chat logo (`public/res/Lotus.png`) is a derivative work based on the o
 - AFK auto-mute: mic is automatically silenced after a configurable idle timeout (1–30 min); a toast confirms the action
 - Voice channel user limit: admins can cap how many people can be in a room's call — enforced server-side for every Matrix client (not just Lotus Chat); others see "Channel Full" until a spot opens
 - Custom join/leave sound effects when someone enters or leaves your call — choose Chime, Soft, Retro, or off
+- Soundboard: upload your own short audio clips (like custom emojis — they sync across your devices) and play them into a call so everyone hears them
+- Call quality settings: cap your microphone bitrate, screenshare bitrate, and screenshare framerate — handy on a slow connection (Settings → Calls)
+- Room call permissions: admins can turn off screen sharing or make a room audio-only (no cameras) — enforced server-side for every Matrix client, and it stops an in-progress share within seconds of being switched off
 
 ### Customization & Appearance
 
@@ -136,6 +143,20 @@ When you first run the installer on Windows, you may see a popup that says **"Wi
 
 After the first install, automatic in-app updates handle all future versions — you will not see this prompt again for updates.
 
+### Desktop-Specific Features
+
+Beyond the web client, the desktop app adds native OS integration (Windows-focused; graceful no-ops elsewhere). See [`LOTUS_FEATURES.md`](./LOTUS_FEATURES.md#desktop-app-features) for detail.
+
+- **Native rich notifications** — Windows toasts you can click to open the room or reply to inline, right from the toast.
+- **Focus Assist sync** — Lotus silences its own notifications while Windows Focus Assist / Quiet Hours is on.
+- **Windows Jump List** — right-click the taskbar icon for quick access to your most-active rooms.
+- **Taskbar call controls** — Mute / Deafen / End Call buttons on the taskbar thumbnail during a call, plus call status in the volume flyout (SMTC).
+- **Stays awake in calls** — the system won't sleep or dim during a voice/video call.
+- **Network awareness** — reconnects promptly when Windows connectivity changes.
+- **Custom window chrome** (opt-in) — a Lotus-styled title bar in place of the OS one.
+- **Recursive folder drag-drop** — drop a whole folder onto the composer to upload everything inside it.
+- **Automatic background updates** with a one-click update toast.
+
 ---
 
 ## For Developers
@@ -144,22 +165,25 @@ The source code lives in `/root/code/cinny`. All changes should be made on the `
 
 See [LOTUS_FEATURES.md](LOTUS_FEATURES.md) for the full feature changelog and [LOTUS_TODO.md](LOTUS_TODO.md) for the work backlog.
 
-### 🔱 Planned: Element Call fork ("Lotus Call")
+### 🔱 Element Call fork ("Lotus Call") — LIVE
 
-Voice/video channels embed **Element Call**. Today it's a **pre-built npm bundle**
+Voice/video channels embed **Element Call**, which is now our **self-built fork**
-(`@element-hq/element-call-embedded` 0.20.1) copied to `public/element-call/` and
+(`@lotusguild/element-call-embedded` `0.20.1-lotus.1`, source at
-served same-origin; we steer it via the `matrix-widget-api` plus fragile DOM
+`LotusGuild/element-call`), published to our private Gitea npm registry and served
-hacks. Because we don't own its compiled source, several in-call issues (avatar
+same-origin. We no longer depend on the upstream prebuilt bundle, so in-call
-decorations on tiles, camera focus/fullscreen during screenshare, mic recovery
+behavior is editable source instead of fragile DOM/widget hacks.
-after reconnect, native theming, real call-audio injection) are unfixable from
-outside.
 
-**The plan is to fork `element-hq/element-call` into a new `LotusGuild/element-call`
+**Shipped via the fork:** denoise as an in-source LiveKit audio stage (survives
-repo, build it from source, and host our own build** for true ownership. The full
+reconnects), in-call speaking/mute events, focus-a-participant during screenshare,
-self-contained plan and integration map — written for a fresh session with no
+avatar decorations on EC video tiles, and a native transparent background.
-prior context — is in **[`HANDOFF_ELEMENT_CALL_FORK.md`](HANDOFF_ELEMENT_CALL_FORK.md)**.
+**Built but dormant (need cinny UI):** real call-audio injection
-Infra/hosting notes also live in the `LotusGuild/matrix` repo README. Search the
+(`io.lotus.inject_audio` → in-call soundboard) and quality controls
-docs for the **`[EC-FORK]`** tag to find every related note.
+(`io.lotus.set_quality`).
+
+The full plan and integration map is in
+**[`HANDOFF_ELEMENT_CALL_FORK.md`](HANDOFF_ELEMENT_CALL_FORK.md)**; infra/hosting +
+build-pipeline notes live in the `LotusGuild/matrix` repo README. Search the docs
+for the **`[EC-FORK]`** tag to find every related note.
 
 ### Build
 

package-lock.json

@@ -51,6 +51,7 @@
         "immer": "11.1.8",
         "is-hotkey": "0.2.0",
         "jotai": "2.20.0",
+        "katex": "0.16.11",
         "linkify-react": "4.3.3",
         "linkifyjs": "4.3.3",
         "matrix-js-sdk": "41.6.0-rc.0",
@@ -83,6 +84,7 @@
         "@types/chroma-js": "3.1.2",
         "@types/file-saver": "2.0.7",
         "@types/is-hotkey": "0.1.10",
+        "@types/katex": "0.16.8",
         "@types/node": "25.9.1",
         "@types/prismjs": "1.26.6",
         "@types/react": "19.2.15",
@@ -3974,6 +3976,13 @@
       "integrity": "sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==",
       "dev": true
     },
+    "node_modules/@types/katex": {
+      "version": "0.16.8",
+      "resolved": "https://registry.npmjs.org/@types/katex/-/katex-0.16.8.tgz",
+      "integrity": "sha512-trgaNyfU+Xh2Tc+ABIb44a5AYUpicB3uwirOioeOkNPPbmgRNtcWyDeeFRzjPZENO9Vq8gvVqfhaaXWLlevVwg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/node": {
       "version": "25.9.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-25.9.1.tgz",
@@ -9087,6 +9096,31 @@
         "node": ">=18"
       }
     },
+    "node_modules/katex": {
+      "version": "0.16.11",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.16.11.tgz",
+      "integrity": "sha512-RQrI8rlHY92OLf3rho/Ts8i/XvjgguEjOkO1BEXcU3N8BqPpSzBNwV/G0Ukr+P/l3ivvJUE/Fa/CwbS6HesGNQ==",
+      "funding": [
+        "https://opencollective.com/katex",
+        "https://github.com/sponsors/katex"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "commander": "^8.3.0"
+      },
+      "bin": {
+        "katex": "cli.js"
+      }
+    },
+    "node_modules/katex/node_modules/commander": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-8.3.0.tgz",
+      "integrity": "sha512-OkTL9umf+He2DZkUq8f8J9of7yL6RJKI24dVITBmNfZBmri9zYZQrKkuXiKhyfPSu8tUhnVBB1iKXevvnlR4Ww==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 12"
+      }
+    },
     "node_modules/keyv": {
       "version": "4.5.4",
       "resolved": "https://registry.npmjs.org/keyv/-/keyv-4.5.4.tgz",

package.json

@@ -76,6 +76,7 @@
     "immer": "11.1.8",
     "is-hotkey": "0.2.0",
     "jotai": "2.20.0",
+    "katex": "0.16.11",
     "linkify-react": "4.3.3",
     "linkifyjs": "4.3.3",
     "matrix-js-sdk": "41.6.0-rc.0",
@@ -108,6 +109,7 @@
     "@types/chroma-js": "3.1.2",
     "@types/file-saver": "2.0.7",
     "@types/is-hotkey": "0.1.10",
+    "@types/katex": "0.16.8",
     "@types/node": "25.9.1",
     "@types/prismjs": "1.26.6",
     "@types/react": "19.2.15",

src/app/components/CallEmbedProvider.tsx

@@ -45,6 +45,7 @@ import { useMatrixClient } from '../hooks/useMatrixClient';
 import { previewRingtone, startRingtone } from '../utils/ringtones';
 import { useCallMembersChange, useCallSession } from '../hooks/useCall';
 import { useCallJoinLeaveSounds } from '../hooks/useCallJoinLeaveSounds';
+import { useCallQuality } from '../hooks/useCallQuality';
 import { useRemoteAllMuted } from '../hooks/useCallSpeakers';
 import { useRoomAvatar, useRoomName } from '../hooks/useRoomMeta';
 import { mDirectAtom } from '../state/mDirectList';
@@ -584,6 +585,7 @@ function CallUtils({ embed }: { embed: CallEmbed }) {
   useCallMemberSoundSync(embed);
   useCallJoinLeaveSounds(embed);
   useCallThemeSync(embed);
+  useCallQuality(embed);
   useCallHangupEvent(
     embed,
     useCallback(() => {

src/app/components/TauriDesktopFeatures.tsx

@@ -0,0 +1,25 @@
+import { useTauriCallPower } from '../hooks/useTauriCallPower';
+import { useTauriJumpList } from '../hooks/useTauriJumpList';
+import { useTauriThumbbar } from '../hooks/useTauriThumbbar';
+import { useTauriSmtc } from '../hooks/useTauriSmtc';
+import { useTauriNetwork } from '../hooks/useTauriNetwork';
+import { useTauriToastActions } from '../hooks/useTauriToastActions';
+import { useTauriFocusAssist } from '../hooks/useTauriFocusAssist';
+
+/**
+ * Mounts the client-scoped native desktop feature hooks (call/room aware). Each
+ * `useTauri*` hook no-ops in the browser (guards on `isTauri`), so this is safe
+ * to render unconditionally. Rendered once by `ClientNonUIFeatures`. App-level
+ * desktop features (window chrome) live in `App.tsx` instead, so they work
+ * before login.
+ */
+export function TauriDesktopFeatures(): null {
+  useTauriCallPower(); // P5-46 no-sleep during calls
+  useTauriJumpList(); // P5-36 Windows jump list of recent rooms
+  useTauriThumbbar(); // P5-44 taskbar thumbnail toolbar (mute/deafen/end)
+  useTauriSmtc(); // P5-43 system media transport controls
+  useTauriNetwork(); // P5-49 network-change awareness → sync retry
+  useTauriToastActions(); // P5-41/35 rich toast click → open room, quick reply → send
+  useTauriFocusAssist(); // P5-56 Windows Focus Assist → DND suppression atom
+  return null;
+}

src/app/components/ThreadNotificationModeSwitcher.tsx

@@ -0,0 +1,127 @@
+import { Box, config, Icon, Icons, IconSrc, Menu, MenuItem, PopOut, RectCords, Text } from 'folds';
+import React, { MouseEventHandler, ReactNode, useMemo, useState } from 'react';
+import FocusTrap from 'focus-trap-react';
+import { stopPropagation } from '../utils/keyboard';
+import { ThreadNotificationMode } from '../utils/threadNotifications';
+import { useSetThreadNotificationMode } from '../hooks/useThreadNotifications';
+import { AsyncStatus } from '../hooks/useAsyncCallback';
+
+export const getThreadNotificationModeIcon = (mode?: ThreadNotificationMode): IconSrc => {
+  if (mode === ThreadNotificationMode.Mute) return Icons.BellMute;
+  if (mode === ThreadNotificationMode.MentionsOnly) return Icons.BellPing;
+  if (mode === ThreadNotificationMode.All) return Icons.BellRing;
+
+  return Icons.Bell;
+};
+
+const useThreadNotificationModes = (): ThreadNotificationMode[] =>
+  useMemo(
+    () => [
+      ThreadNotificationMode.Default,
+      ThreadNotificationMode.All,
+      ThreadNotificationMode.MentionsOnly,
+      ThreadNotificationMode.Mute,
+    ],
+    [],
+  );
+
+const useThreadNotificationModeStr = (): Record<ThreadNotificationMode, string> =>
+  useMemo(
+    () => ({
+      [ThreadNotificationMode.Default]: 'Default (participating)',
+      [ThreadNotificationMode.All]: 'All replies',
+      [ThreadNotificationMode.MentionsOnly]: 'Mentions only',
+      [ThreadNotificationMode.Mute]: 'Mute',
+    }),
+    [],
+  );
+
+type ThreadNotificationModeSwitcherProps = {
+  roomId: string;
+  threadId: string;
+  value?: ThreadNotificationMode;
+  children: (
+    handleOpen: MouseEventHandler<HTMLButtonElement>,
+    opened: boolean,
+    changing: boolean,
+  ) => ReactNode;
+};
+export function ThreadNotificationModeSwitcher({
+  roomId,
+  threadId,
+  value = ThreadNotificationMode.Default,
+  children,
+}: ThreadNotificationModeSwitcherProps) {
+  const modes = useThreadNotificationModes();
+  const modeToStr = useThreadNotificationModeStr();
+
+  const { modeState, setMode } = useSetThreadNotificationMode(roomId, threadId);
+  const changing = modeState.status === AsyncStatus.Loading;
+
+  const [menuCords, setMenuCords] = useState<RectCords>();
+
+  const handleOpenMenu: MouseEventHandler<HTMLButtonElement> = (evt) => {
+    setMenuCords(evt.currentTarget.getBoundingClientRect());
+  };
+
+  const handleClose = () => {
+    setMenuCords(undefined);
+  };
+
+  const handleSelect = (mode: ThreadNotificationMode) => {
+    if (changing) return;
+    setMode(mode);
+    handleClose();
+  };
+
+  return (
+    <PopOut
+      anchor={menuCords}
+      offset={5}
+      position="Bottom"
+      align="End"
+      content={
+        <FocusTrap
+          focusTrapOptions={{
+            initialFocus: false,
+            onDeactivate: handleClose,
+            clickOutsideDeactivates: true,
+            isKeyForward: (evt: KeyboardEvent) =>
+              evt.key === 'ArrowDown' || evt.key === 'ArrowRight',
+            isKeyBackward: (evt: KeyboardEvent) => evt.key === 'ArrowUp' || evt.key === 'ArrowLeft',
+            escapeDeactivates: stopPropagation,
+          }}
+        >
+          <Menu>
+            <Box direction="Column" gap="100" style={{ padding: config.space.S100 }}>
+              {modes.map((mode) => (
+                <MenuItem
+                  key={mode}
+                  size="300"
+                  variant="Surface"
+                  aria-pressed={mode === value}
+                  radii="300"
+                  disabled={changing}
+                  onClick={() => handleSelect(mode)}
+                  before={
+                    <Icon
+                      size="100"
+                      src={getThreadNotificationModeIcon(mode)}
+                      filled={mode === value}
+                    />
+                  }
+                >
+                  <Text size="T300">
+                    {mode === value ? <b>{modeToStr[mode]}</b> : modeToStr[mode]}
+                  </Text>
+                </MenuItem>
+              ))}
+            </Box>
+          </Menu>
+        </FocusTrap>
+      }
+    >
+      {children(handleOpenMenu, !!menuCords, changing)}
+    </PopOut>
+  );
+}

src/app/components/math/KaTeX.tsx

@@ -0,0 +1,41 @@
+import React from 'react';
+import katex from 'katex';
+import 'katex/dist/katex.min.css';
+
+type KaTeXProps = {
+  /** Raw LaTeX source (without `$`/`$$` delimiters). */
+  latex: string;
+  /** Render as block (display) math when true, inline otherwise. */
+  displayMode?: boolean;
+};
+
+/**
+ * Lazily-loaded KaTeX renderer.
+ *
+ * This module statically imports `katex` and its stylesheet, so both only enter
+ * the bundle via the dynamic `import()` of this file (see the `lazy()` wrapper
+ * in `react-custom-html-parser.tsx`). They are therefore NOT part of the eager
+ * import graph.
+ *
+ * We render with `throwOnError: false`, so KaTeX itself renders a parse error
+ * inline (in its error colour) rather than throwing. The HTML returned by
+ * `renderToString` is produced by our own trusted call from a fixed options
+ * object — it is safe to inject via `dangerouslySetInnerHTML`.
+ */
+export default function KaTeX({ latex, displayMode = false }: KaTeXProps) {
+  const html = katex.renderToString(latex, {
+    displayMode,
+    throwOnError: false,
+    output: 'htmlAndMathml',
+  });
+
+  const Wrapper = displayMode ? 'div' : 'span';
+
+  return (
+    <Wrapper
+      // KaTeX output is generated by our own render call (trusted-safe).
+      // eslint-disable-next-line react/no-danger
+      dangerouslySetInnerHTML={{ __html: html }}
+    />
+  );
+}

src/app/components/message/Reply.tsx

@@ -61,6 +61,7 @@ type ReplyProps = {
   replyEventId: string;
   threadRootId?: string | undefined;
   onClick?: MouseEventHandler | undefined;
+  onThreadClick?: ((threadRootId: string) => void) | undefined;
   getMemberPowerTag?: GetMemberPowerTag;
   accessibleTagColors?: Map<string, string>;
   legacyUsernameColor?: boolean;
@@ -74,6 +75,7 @@ export const Reply = as<'div', ReplyProps>(
       replyEventId,
       threadRootId,
       onClick,
+      onThreadClick,
       getMemberPowerTag,
       accessibleTagColors,
       legacyUsernameColor,
@@ -110,7 +112,7 @@ export const Reply = as<'div', ReplyProps>(
           <ThreadIndicator
             as="button"
             data-event-id={threadRootId}
-            onClick={onClick}
+            onClick={onThreadClick ? () => onThreadClick(threadRootId) : onClick}
             aria-label="View thread"
           />
         )}

src/app/components/seasonal/Seasonal.css.ts

@@ -1,136 +0,0 @@
-import { keyframes } from '@vanilla-extract/css';
-
-/** Generic fall: particles drop from top to bottom with a slight rotate. */
-export const animSeasonFall = keyframes({
-  '0%': { transform: 'translateY(-20px) translateX(0) rotate(0deg)', opacity: '0' },
-  '5%': { opacity: '1' },
-  '90%': { opacity: '0.8' },
-  '100%': { transform: 'translateY(110vh) translateX(25px) rotate(360deg)', opacity: '0' },
-});
-
-/** Leaf fall: exaggerated horizontal sway as the leaf tumbles down. */
-export const animLeafFall = keyframes({
-  '0%': { transform: 'translateY(-20px) translateX(0) rotate(-20deg)', opacity: '0' },
-  '8%': { opacity: '0.85' },
-  '25%': { transform: 'translateY(25vh) translateX(35px) rotate(40deg)' },
-  '50%': { transform: 'translateY(50vh) translateX(-25px) rotate(130deg)' },
-  '75%': { transform: 'translateY(75vh) translateX(45px) rotate(260deg)' },
-  '92%': { opacity: '0.6' },
-  '100%': { transform: 'translateY(110vh) translateX(5px) rotate(380deg)', opacity: '0' },
-});
-
-/** Float up: hearts / embers rise from the bottom. */
-export const animFloatUp = keyframes({
-  '0%': { transform: 'translateY(0) scale(0.6) translateX(0)', opacity: '0' },
-  '8%': { opacity: '0.9' },
-  '50%': { transform: 'translateY(-50vh) scale(1) translateX(15px)' },
-  '85%': { opacity: '0.4' },
-  '100%': { transform: 'translateY(-105vh) scale(1.3) translateX(-10px)', opacity: '0' },
-});
-
-/** Bob: lanterns gently rise and fall with a slight tilt. */
-export const animBob = keyframes({
-  '0%': { transform: 'translateY(0px) rotate(-4deg)' },
-  '50%': { transform: 'translateY(-18px) rotate(4deg)' },
-  '100%': { transform: 'translateY(0px) rotate(-4deg)' },
-});
-
-/** Lantern tassel sway (used on the tassel element only). */
-export const animTasselSway = keyframes({
-  '0%': { transform: 'rotate(-8deg)' },
-  '50%': { transform: 'rotate(8deg)' },
-  '100%': { transform: 'rotate(-8deg)' },
-});
-
-/** Glitch jitter: rapid position jumps that feel like a signal error. */
-export const animGlitch = keyframes({
-  '0%': { transform: 'translate(0, 0)' },
-  '2%': { transform: 'translate(-4px, 2px)' },
-  '4%': { transform: 'translate(4px, -2px)' },
-  '6%': { transform: 'translate(0, 0)' },
-  '48%': { transform: 'translate(0, 0)' },
-  '50%': { transform: 'translate(3px, -3px)' },
-  '52%': { transform: 'translate(-3px, 3px)' },
-  '54%': { transform: 'translate(0, 0)' },
-  '78%': { transform: 'translate(0, 0)' },
-  '80%': { transform: 'translate(-5px, 1px)' },
-  '82%': { transform: 'translate(0, 0)' },
-  '100%': { transform: 'translate(0, 0)' },
-});
-
-/** Glitch color: hue + saturation spikes that look like a corrupted signal. */
-export const animGlitchColor = keyframes({
-  '0%': { filter: 'hue-rotate(0deg) saturate(1)' },
-  '8%': { filter: 'hue-rotate(180deg) saturate(3)' },
-  '9%': { filter: 'hue-rotate(0deg) saturate(1)' },
-  '55%': { filter: 'hue-rotate(0deg) saturate(1)' },
-  '57%': { filter: 'hue-rotate(90deg) saturate(2)' },
-  '58%': { filter: 'hue-rotate(0deg) saturate(1)' },
-  '80%': { filter: 'hue-rotate(0deg) saturate(1)' },
-  '82%': { filter: 'hue-rotate(270deg) saturate(2.5)' },
-  '83%': { filter: 'hue-rotate(0deg) saturate(1)' },
-  '100%': { filter: 'hue-rotate(0deg) saturate(1)' },
-});
-
-/** Glitch scanline: a horizontal band sweeps across, flickering. */
-export const animGlitchScan = keyframes({
-  '0%': { transform: 'translateY(-100%)' },
-  '100%': { transform: 'translateY(100vh)' },
-});
-
-/** Burst: circle expands outward from a point and fades — firework petal. */
-export const animBurst = keyframes({
-  '0%': { transform: 'scale(0) rotate(0deg)', opacity: '1' },
-  '50%': { opacity: '0.7' },
-  '100%': { transform: 'scale(1) rotate(45deg)', opacity: '0' },
-});
-
-/** Firework trail: a small dot rockets upward before bursting. */
-export const animRocket = keyframes({
-  '0%': { transform: 'translateY(0)', opacity: '1' },
-  '100%': { transform: 'translateY(-40vh)', opacity: '0' },
-});
-
-/** Deep space warp: stars streak from center outward. */
-export const animWarp = keyframes({
-  '0%': { transform: 'scale(0.05) translate(0, 0)', opacity: '0' },
-  '10%': { opacity: '1' },
-  '100%': { transform: 'scale(4) translate(0, 0)', opacity: '0' },
-});
-
-/** Arcade scanline flicker. */
-export const animScanline = keyframes({
-  '0%': { opacity: '0.12' },
-  '50%': { opacity: '0.04' },
-  '100%': { opacity: '0.12' },
-});
-
-/** Arcade pixel blink: decorative corner glyphs blink. */
-export const animPixelBlink = keyframes({
-  '0%, 49%': { opacity: '1' },
-  '50%, 100%': { opacity: '0' },
-});
-
-/** Gold shimmer: a shine sweeps across a metallic surface. */
-export const animGoldShimmer = keyframes({
-  '0%': { backgroundPosition: '-300% 0' },
-  '100%': { backgroundPosition: '300% 0' },
-});
-
-/** Clover drift: gentle fall with a slow spin. */
-export const animCloverDrift = keyframes({
-  '0%': { transform: 'translateY(-20px) rotate(0deg)', opacity: '0' },
-  '5%': { opacity: '0.7' },
-  '90%': { opacity: '0.5' },
-  '100%': { transform: 'translateY(110vh) rotate(720deg)', opacity: '0' },
-});
-
-/** Earth Day leaf sway: gentle horizontal oscillation for ambient leaf particles. */
-export const animEarthLeafDrift = keyframes({
-  '0%': { transform: 'translateY(-10px) translateX(0) rotate(0deg)', opacity: '0' },
-  '8%': { opacity: '0.6' },
-  '30%': { transform: 'translateY(30vh) translateX(20px) rotate(90deg)' },
-  '60%': { transform: 'translateY(60vh) translateX(-15px) rotate(200deg)' },
-  '90%': { opacity: '0.4' },
-  '100%': { transform: 'translateY(110vh) translateX(10px) rotate(340deg)', opacity: '0' },
-});

src/app/components/seasonal/SeasonalEffect.tsx

@@ -2,719 +2,24 @@ import React, { useMemo } from 'react';
 import { useAtomValue } from 'jotai';
 import { settingsAtom } from '../../state/settings';
 import { zIndices } from '../../styles/zIndex';
-import {
+import { SeasonTheme } from './types';
-  animSeasonFall,
+import { getActiveSeason } from './seasonSchedule';
-  animLeafFall,
+import { HalloweenOverlay } from './themes/Halloween';
-  animFloatUp,
+import { ChristmasOverlay } from './themes/Christmas';
-  animBob,
+import { NewYearOverlay } from './themes/NewYear';
-  animTasselSway,
+import { AutumnOverlay } from './themes/Autumn';
-  animGoldShimmer,
+import { AprilFoolsOverlay } from './themes/AprilFools';
-  animCloverDrift,
+import { LunarNewYearOverlay } from './themes/LunarNewYear';
-  animEarthLeafDrift,
+import { ValentinesOverlay } from './themes/Valentines';
-  animWarp,
+import { StPatricksOverlay } from './themes/StPatricks';
-  animScanline,
+import { EarthDayOverlay } from './themes/EarthDay';
-  animPixelBlink,
+import { DeepSpaceOverlay } from './themes/DeepSpace';
-} from './Seasonal.css';
+import { ArcadeOverlay } from './themes/Arcade';
 
-export type SeasonTheme =
+// SeasonTheme + the date-window logic now live in leaf modules (single source
-  | 'halloween'
+// of truth, shared with the settings UI). Re-exported here for existing
-  | 'christmas'
+// importers that still reach for it from this file.
-  | 'newyear'
+export type { SeasonTheme };
-  | 'autumn'
-  | 'aprilfools'
-  | 'lunar'
-  | 'valentines'
-  | 'stpatricks'
-  | 'earthday'
-  | 'deepspace'
-  | 'arcade';
-
-function getActiveSeason(now: Date): SeasonTheme | null {
-  const m = now.getMonth() + 1; // 1-12
-  const d = now.getDate();
-
-  // New Year takes highest priority (Dec 31 – Jan 2)
-  if ((m === 12 && d === 31) || (m === 1 && d <= 2)) return 'newyear';
-  // Valentine's Day (Feb 10–15)
-  if (m === 2 && d >= 10 && d <= 15) return 'valentines';
-  // St. Patrick's Day (March 15–18)
-  if (m === 3 && d >= 15 && d <= 18) return 'stpatricks';
-  // April Fool's (April 1)
-  if (m === 4 && d === 1) return 'aprilfools';
-  // Earth Day (April 20–23)
-  if (m === 4 && d >= 20 && d <= 23) return 'earthday';
-  // Lunar New Year (Jan 22 – Feb 5, approximate fixed window)
-  if ((m === 1 && d >= 22) || (m === 2 && d <= 5)) return 'lunar';
-  // International Video Game Day (Sept 12)
-  if (m === 9 && d === 12) return 'arcade';
-  // World Space Week (Oct 4–10)
-  if (m === 10 && d >= 4 && d <= 10) return 'deepspace';
-  // Halloween (Oct 15 – Nov 1)
-  if ((m === 10 && d >= 15) || (m === 11 && d === 1)) return 'halloween';
-  // Christmas (Dec 10–30)
-  if (m === 12 && d >= 10) return 'christmas';
-  // Autumn (Sept 21 – Oct 31, excluding Halloween/Deep Space windows above)
-  if ((m === 9 && d >= 21) || (m === 10 && d <= 14)) return 'autumn';
-
-  return null;
-}
-
-// ─── Individual theme overlays ────────────────────────────────────────────────
-
-function HalloweenOverlay({ reduced }: { reduced: boolean }) {
-  const particles = Array.from({ length: 22 });
-  return (
-    <>
-      {/* Dark purple ambient tint */}
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundColor: 'rgba(25,0,45,0.22)',
-          backgroundImage:
-            'radial-gradient(ellipse at 50% 50%, rgba(100,0,180,0.08) 0%, transparent 70%)',
-        }}
-      />
-      {/* Spider web corners */}
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          top: 0,
-          left: 0,
-          width: '160px',
-          height: '160px',
-          backgroundImage: `url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'><g stroke='rgba(180,120,255,0.35)' stroke-width='0.7' fill='none'><line x1='0' y1='0' x2='80' y2='80'/><line x1='40' y1='0' x2='80' y2='80'/><line x1='80' y1='0' x2='80' y2='80'/><line x1='0' y1='40' x2='80' y2='80'/><line x1='0' y1='80' x2='80' y2='80'/><ellipse cx='80' cy='80' rx='20' ry='20'/><ellipse cx='80' cy='80' rx='40' ry='40'/><ellipse cx='80' cy='80' rx='60' ry='60'/><ellipse cx='80' cy='80' rx='80' ry='80'/></g></svg>")`,
-          backgroundRepeat: 'no-repeat',
-          opacity: 0.7,
-        }}
-      />
-      {/* Falling purple/orange particles */}
-      {!reduced &&
-        particles.map((_, i) => {
-          const isOrange = i % 3 === 0;
-          const size = 4 + (i % 3) * 2;
-          const left = (i * 4597 + 137) % 100;
-          const duration = 8 + (i % 7) * 1.5;
-          const delay = (i * 0.45) % 7;
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                top: '-8px',
-                left: `${left}%`,
-                width: `${size}px`,
-                height: `${size}px`,
-                borderRadius: '50%',
-                backgroundColor: isOrange ? 'rgba(255,100,0,0.75)' : 'rgba(160,0,255,0.7)',
-                boxShadow: isOrange ? '0 0 8px rgba(255,100,0,0.5)' : '0 0 8px rgba(160,0,255,0.5)',
-                animation: `${animSeasonFall} ${duration}s ease-in ${delay}s infinite`,
-              }}
-            />
-          );
-        })}
-    </>
-  );
-}
-
-function ChristmasOverlay({ reduced }: { reduced: boolean }) {
-  const flakes = Array.from({ length: 28 });
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage:
-            'radial-gradient(ellipse at 50% 0%, rgba(220,240,255,0.06) 0%, transparent 60%)',
-        }}
-      />
-      {!reduced &&
-        flakes.map((_, i) => {
-          const size = 3 + (i % 4) * 2;
-          const left = (i * 3571 + 251) % 100;
-          const duration = 10 + (i % 8) * 2;
-          const delay = (i * 0.55) % 10;
-          const drift = ((i % 5) - 2) * 12;
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                top: '-10px',
-                left: `${left}%`,
-                width: `${size}px`,
-                height: `${size}px`,
-                borderRadius: '50%',
-                backgroundColor: 'rgba(255,255,255,0.82)',
-                boxShadow: '0 0 4px rgba(200,230,255,0.6)',
-                animation: `${animSeasonFall} ${duration}s ease-in ${delay}s infinite`,
-                transform: `translateX(${drift}px)`,
-              }}
-            />
-          );
-        })}
-    </>
-  );
-}
-
-// Replaced flashing burst rays with gentle falling confetti
-function NewYearOverlay({ reduced }: { reduced: boolean }) {
-  const confetti = Array.from({ length: 24 });
-  const colors = ['#ffd700', '#ff4466', '#00d4ff', '#aa44ff', '#ff8800', '#ffffff'];
-
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundColor: 'rgba(10,5,0,0.10)',
-          backgroundImage:
-            'radial-gradient(ellipse at 50% 50%, rgba(255,200,0,0.04) 0%, transparent 70%)',
-        }}
-      />
-      {/* Gentle falling confetti */}
-      {!reduced &&
-        confetti.map((_, i) => {
-          const c = colors[i % colors.length];
-          const left = (i * 4597 + 137) % 100;
-          const size = 3 + (i % 3) * 2;
-          const duration = 8 + (i % 7) * 1.5;
-          const delay = (i * 0.4) % 8;
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                top: '-8px',
-                left: `${left}%`,
-                width: `${size}px`,
-                height: `${size}px`,
-                borderRadius: i % 2 === 0 ? '50%' : '1px',
-                backgroundColor: c,
-                boxShadow: `0 0 ${size + 2}px ${c}`,
-                animation: `${animSeasonFall} ${duration}s ease-in ${delay}s infinite`,
-                opacity: 0.7 + (i % 3) * 0.1,
-              }}
-            />
-          );
-        })}
-      {/* Slow gold shimmer */}
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage:
-            'linear-gradient(105deg, transparent 30%, rgba(255,215,0,0.05) 50%, transparent 70%)',
-          backgroundSize: '200% 100%',
-          animation: reduced ? 'none' : `${animGoldShimmer} 5s linear infinite`,
-        }}
-      />
-    </>
-  );
-}
-
-function AutumnOverlay({ reduced }: { reduced: boolean }) {
-  const leaves = Array.from({ length: 18 });
-  const colors = [
-    'rgba(220,80,20,0.75)',
-    'rgba(200,120,0,0.7)',
-    'rgba(180,50,10,0.7)',
-    'rgba(230,150,0,0.65)',
-    'rgba(160,80,0,0.6)',
-  ];
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage:
-            'radial-gradient(ellipse at 50% 100%, rgba(180,80,0,0.06) 0%, transparent 60%)',
-        }}
-      />
-      {!reduced &&
-        leaves.map((_, i) => {
-          const left = (i * 5381 + 179) % 100;
-          const duration = 12 + (i % 6) * 2;
-          const delay = (i * 0.65) % 12;
-          const size = 10 + (i % 4) * 4;
-          const col = colors[i % colors.length];
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                top: '-15px',
-                left: `${left}%`,
-                width: `${size}px`,
-                height: `${size * 0.7}px`,
-                borderRadius: '50% 0 50% 0',
-                backgroundColor: col,
-                boxShadow: `0 0 4px ${col}`,
-                animation: `${animLeafFall} ${duration}s ease-in ${delay}s infinite`,
-              }}
-            />
-          );
-        })}
-    </>
-  );
-}
-
-// Replaced aggressive glitch with playful confetti rain
-function AprilFoolsOverlay({ reduced }: { reduced: boolean }) {
-  const particles = Array.from({ length: 20 });
-  const symbols = ['?', '!', '¿', '‽', '?', '!'];
-  const colors = [
-    'rgba(255,80,80,0.55)',
-    'rgba(255,200,0,0.55)',
-    'rgba(80,200,80,0.55)',
-    'rgba(80,80,255,0.55)',
-    'rgba(200,80,200,0.55)',
-    'rgba(80,200,200,0.55)',
-  ];
-
-  return (
-    <>
-      {/* Subtle rainbow stripe along top edge */}
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          top: 0,
-          left: 0,
-          right: 0,
-          height: '3px',
-          backgroundImage:
-            'linear-gradient(90deg, rgba(255,0,0,0.4), rgba(255,165,0,0.4), rgba(255,255,0,0.4), rgba(0,200,0,0.4), rgba(0,0,255,0.4), rgba(128,0,128,0.4))',
-          opacity: 0.7,
-        }}
-      />
-      {/* Gentle falling punctuation symbols */}
-      {!reduced &&
-        particles.map((_, i) => {
-          const left = (i * 5381 + 179) % 100;
-          const duration = 11 + (i % 5) * 2.5;
-          const delay = (i * 0.55) % 10;
-          const col = colors[i % colors.length];
-          const sym = symbols[i % symbols.length];
-          const size = 12 + (i % 3) * 5;
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                top: '-20px',
-                left: `${left}%`,
-                fontSize: `${size}px`,
-                color: col,
-                fontWeight: 700,
-                fontFamily: 'monospace',
-                animation: `${animSeasonFall} ${duration}s ease-in ${delay}s infinite`,
-                userSelect: 'none',
-              }}
-            >
-              {sym}
-            </div>
-          );
-        })}
-    </>
-  );
-}
-
-// Reduced to 4 lanterns, subtler tint and shimmer
-function LunarNewYearOverlay({ reduced }: { reduced: boolean }) {
-  const lanterns = Array.from({ length: 4 }); // was 9
-  return (
-    <>
-      {/* Very subtle red silk tint */}
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundColor: 'rgba(140,0,0,0.05)',
-          backgroundImage: [
-            'repeating-linear-gradient(45deg, rgba(200,20,0,0.015) 0px, rgba(200,20,0,0.015) 1px, transparent 1px, transparent 8px)',
-            'repeating-linear-gradient(135deg, rgba(200,20,0,0.015) 0px, rgba(200,20,0,0.015) 1px, transparent 1px, transparent 8px)',
-          ].join(','),
-        }}
-      />
-      {/* Slow gold shimmer */}
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage:
-            'linear-gradient(100deg, transparent 25%, rgba(255,200,0,0.05) 45%, rgba(255,220,50,0.07) 50%, rgba(255,200,0,0.05) 55%, transparent 75%)',
-          backgroundSize: '300% 100%',
-          animation: reduced ? 'none' : `${animGoldShimmer} 8s linear infinite`,
-        }}
-      />
-      {/* 4 floating lanterns */}
-      {lanterns.map((_, i) => {
-        const left = 10 + ((i * 4603 + 311) % 75);
-        const top = 10 + ((i * 2311 + 97) % 50);
-        const duration = 3.5 + (i % 4) * 0.7;
-        const delay = i * 0.9;
-        return (
-          <div
-            key={i}
-            aria-hidden="true"
-            style={{
-              position: 'absolute',
-              left: `${left}%`,
-              top: `${top}%`,
-              animation: reduced
-                ? 'none'
-                : `${animBob} ${duration}s ease-in-out ${delay}s infinite`,
-            }}
-          >
-            <div
-              style={{
-                width: '18px',
-                height: '5px',
-                backgroundColor: '#ffd700',
-                borderRadius: '2px',
-                margin: '0 auto',
-                boxShadow: '0 0 4px rgba(255,215,0,0.6)',
-              }}
-            />
-            <div
-              style={{
-                width: '24px',
-                height: '32px',
-                backgroundColor: '#cc0000',
-                borderRadius: '50%',
-                border: '1.5px solid #ffd700',
-                boxShadow: '0 0 14px rgba(200,0,0,0.5), inset 0 0 10px rgba(255,200,0,0.2)',
-                margin: '1px auto',
-              }}
-            />
-            <div
-              style={{
-                width: '18px',
-                height: '5px',
-                backgroundColor: '#ffd700',
-                borderRadius: '2px',
-                margin: '0 auto',
-              }}
-            />
-            <div
-              style={{
-                width: '2px',
-                height: '14px',
-                backgroundColor: '#ffd700',
-                margin: '0 auto',
-                animation: reduced
-                  ? 'none'
-                  : `${animTasselSway} ${duration * 0.6}s ease-in-out ${delay}s infinite`,
-                transformOrigin: 'top center',
-              }}
-            />
-          </div>
-        );
-      })}
-    </>
-  );
-}
-
-function ValentinesOverlay({ reduced }: { reduced: boolean }) {
-  const hearts = Array.from({ length: 18 });
-  const colors = [
-    'rgba(255,100,140,0.8)',
-    'rgba(255,150,180,0.65)',
-    'rgba(220,70,110,0.7)',
-    'rgba(255,180,200,0.55)',
-  ];
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage:
-            'radial-gradient(ellipse at 50% 100%, rgba(255,100,140,0.06) 0%, transparent 55%)',
-        }}
-      />
-      {!reduced &&
-        hearts.map((_, i) => {
-          const left = 3 + ((i * 6271 + 443) % 94);
-          const duration = 9 + (i % 6) * 1.8;
-          const delay = (i * 0.6) % 9;
-          const size = 14 + (i % 4) * 5;
-          const col = colors[i % colors.length];
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                bottom: '-20px',
-                left: `${left}%`,
-                fontSize: `${size}px`,
-                color: col,
-                filter: 'drop-shadow(0 0 4px rgba(255,100,140,0.4))',
-                animation: `${animFloatUp} ${duration}s ease-in ${delay}s infinite`,
-                userSelect: 'none',
-              }}
-            >
-              ♥
-            </div>
-          );
-        })}
-    </>
-  );
-}
-
-function StPatricksOverlay({ reduced }: { reduced: boolean }) {
-  const clovers = Array.from({ length: 18 });
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage: [
-            'radial-gradient(ellipse at 50% 0%, rgba(0,160,60,0.07) 0%, transparent 50%)',
-            'radial-gradient(ellipse at 50% 100%, rgba(0,130,50,0.05) 0%, transparent 40%)',
-          ].join(','),
-        }}
-      />
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          top: 0,
-          left: 0,
-          right: 0,
-          height: '3px',
-          backgroundImage:
-            'linear-gradient(90deg, transparent 0%, #ffd700 20%, #fff4a0 40%, #ffd700 60%, transparent 100%)',
-          backgroundSize: '300% 100%',
-          animation: reduced ? 'none' : `${animGoldShimmer} 3s linear infinite`,
-        }}
-      />
-      {!reduced &&
-        clovers.map((_, i) => {
-          const left = (i * 4129 + 223) % 100;
-          const duration = 14 + (i % 6) * 2;
-          const delay = (i * 0.7) % 12;
-          const size = 14 + (i % 3) * 6;
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                top: '-20px',
-                left: `${left}%`,
-                fontSize: `${size}px`,
-                opacity: 0.45 + (i % 3) * 0.1,
-                filter: 'drop-shadow(0 0 3px rgba(0,180,60,0.3))',
-                animation: `${animCloverDrift} ${duration}s linear ${delay}s infinite`,
-                userSelect: 'none',
-              }}
-            >
-              ☘
-            </div>
-          );
-        })}
-    </>
-  );
-}
-
-function EarthDayOverlay({ reduced }: { reduced: boolean }) {
-  const leaves = Array.from({ length: 16 });
-  const leafEmoji = ['🌿', '🍃', '🌱', '🍀'];
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage: [
-            'radial-gradient(ellipse at 30% 70%, rgba(60,160,60,0.07) 0%, transparent 50%)',
-            'radial-gradient(ellipse at 70% 30%, rgba(100,180,80,0.05) 0%, transparent 45%)',
-          ].join(','),
-        }}
-      />
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          left: 0,
-          top: 0,
-          bottom: 0,
-          width: '3px',
-          backgroundImage:
-            'linear-gradient(180deg, transparent 0%, rgba(60,160,60,0.4) 20%, rgba(80,180,60,0.6) 50%, rgba(60,160,60,0.4) 80%, transparent 100%)',
-        }}
-      />
-      {!reduced &&
-        leaves.map((_, i) => {
-          const left = 3 + ((i * 5023 + 317) % 92);
-          const duration = 13 + (i % 5) * 2;
-          const delay = (i * 0.75) % 11;
-          const size = 14 + (i % 3) * 5;
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                top: '-20px',
-                left: `${left}%`,
-                fontSize: `${size}px`,
-                opacity: 0.5 + (i % 3) * 0.1,
-                animation: `${animEarthLeafDrift} ${duration}s ease-in ${delay}s infinite`,
-                userSelect: 'none',
-              }}
-            >
-              {leafEmoji[i % leafEmoji.length]}
-            </div>
-          );
-        })}
-    </>
-  );
-}
-
-function DeepSpaceOverlay({ reduced }: { reduced: boolean }) {
-  const stars = Array.from({ length: 24 });
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundColor: 'rgba(0,0,8,0.3)',
-          backgroundImage: [
-            'radial-gradient(ellipse at 30% 40%, rgba(80,0,180,0.10) 0%, transparent 50%)',
-            'radial-gradient(ellipse at 70% 60%, rgba(0,60,180,0.10) 0%, transparent 50%)',
-            'radial-gradient(ellipse at 50% 20%, rgba(120,0,200,0.07) 0%, transparent 40%)',
-          ].join(','),
-        }}
-      />
-      {!reduced &&
-        stars.map((_, i) => {
-          const angle = (i / stars.length) * 360;
-          const duration = 2.5 + (i % 5) * 0.4;
-          const delay = (i * 0.18) % 2.5;
-          const period = 3 + (i % 4) * 0.5;
-          const size = 1 + (i % 3);
-          const starColors = [
-            'rgba(200,180,255,0.9)',
-            'rgba(150,200,255,0.8)',
-            'rgba(255,255,255,0.7)',
-          ];
-          return (
-            <div
-              key={i}
-              aria-hidden="true"
-              style={{
-                position: 'absolute',
-                left: '50%',
-                top: '50%',
-                width: `${80 + i * 6}px`,
-                height: `${size}px`,
-                backgroundColor: starColors[i % starColors.length],
-                transformOrigin: '0 50%',
-                transform: `rotate(${angle}deg)`,
-                boxShadow: `0 0 ${size * 2}px ${starColors[i % starColors.length]}`,
-                animation: `${animWarp} ${duration}s ease-out ${delay}s ${period}s infinite`,
-                opacity: 0,
-              }}
-            />
-          );
-        })}
-    </>
-  );
-}
-
-function ArcadeOverlay({ reduced }: { reduced: boolean }) {
-  return (
-    <>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage:
-            'repeating-linear-gradient(0deg, rgba(0,0,0,0.12) 0px, rgba(0,0,0,0.12) 1px, transparent 1px, transparent 3px)',
-          animation: reduced ? 'none' : `${animScanline} 3s ease-in-out infinite`,
-        }}
-      />
-      {(['0,0', '0,auto', 'auto,0', 'auto,auto'] as const).map((corner, i) => {
-        const [t, b] = corner.split(',');
-        return (
-          <div
-            key={i}
-            aria-hidden="true"
-            style={{
-              position: 'absolute',
-              top: t === '0' ? '8px' : undefined,
-              bottom: b === '0' ? '8px' : undefined,
-              left: i % 2 === 0 ? '8px' : undefined,
-              right: i % 2 === 1 ? '8px' : undefined,
-              fontFamily: 'monospace',
-              fontSize: '11px',
-              color: 'rgba(0,255,136,0.5)',
-              letterSpacing: '0.05em',
-              animation: reduced ? 'none' : `${animPixelBlink} ${1 + i * 0.3}s step-end infinite`,
-              userSelect: 'none',
-            }}
-          >
-            {['[■]', '[■]', '[■]', '[■]'][i]}
-          </div>
-        );
-      })}
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          bottom: '16px',
-          left: '50%',
-          transform: 'translateX(-50%)',
-          fontFamily: 'monospace',
-          fontSize: '12px',
-          letterSpacing: '0.2em',
-          color: 'rgba(255,220,0,0.4)',
-          animation: reduced ? 'none' : `${animPixelBlink} 1.2s step-end infinite`,
-          userSelect: 'none',
-          whiteSpace: 'nowrap',
-        }}
-      >
-        — INSERT COIN —
-      </div>
-      <div
-        aria-hidden="true"
-        style={{
-          position: 'absolute',
-          inset: 0,
-          backgroundImage:
-            'radial-gradient(ellipse at 50% 50%, transparent 60%, rgba(0,0,0,0.35) 100%)',
-        }}
-      />
-    </>
-  );
-}
 
 // ─── Overlay content map (shared between SeasonalOverlay and SeasonalPreview) ──
 

src/app/components/seasonal/seasonSchedule.test.ts

@@ -0,0 +1,65 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+
+import { getActiveSeason, SEASON_SCHEDULE, SEASON_DATE_RANGES } from './seasonSchedule';
+import { SeasonTheme } from './types';
+
+// Date(year, monthIndex0, day)
+const on = (monthIndex0: number, day: number): Date => new Date(2026, monthIndex0, day);
+
+test('each theme activates on a representative day in its window', () => {
+  const cases: Array<[Date, SeasonTheme]> = [
+    [on(11, 31), 'newyear'], // Dec 31
+    [on(0, 1), 'newyear'], // Jan 1
+    [on(0, 25), 'lunar'], // Jan 25
+    [on(1, 3), 'lunar'], // Feb 3
+    [on(1, 12), 'valentines'], // Feb 12
+    [on(2, 16), 'stpatricks'], // Mar 16
+    [on(3, 1), 'aprilfools'], // Apr 1
+    [on(3, 21), 'earthday'], // Apr 21
+    [on(8, 12), 'arcade'], // Sep 12
+    [on(8, 25), 'autumn'], // Sep 25
+    [on(9, 20), 'halloween'], // Oct 20
+    [on(10, 1), 'halloween'], // Nov 1
+    [on(11, 15), 'christmas'], // Dec 15
+  ];
+  for (const [date, expected] of cases) {
+    assert.equal(getActiveSeason(date), expected, `${date.toDateString()} -> ${expected}`);
+  }
+});
+
+test('priority order resolves overlapping windows (Deep Space outranks Autumn)', () => {
+  // Oct 4-10 is inside Autumn's Oct<=14 window too; Deep Space comes first.
+  assert.equal(getActiveSeason(on(9, 5)), 'deepspace'); // Oct 5
+  // Oct 12 is past Deep Space -> falls through to Autumn.
+  assert.equal(getActiveSeason(on(9, 12)), 'autumn');
+});
+
+test('New Year outranks Lunar New Year on Jan 1-2', () => {
+  assert.equal(getActiveSeason(on(0, 1)), 'newyear');
+  // Jan 22+ is past New Year -> Lunar.
+  assert.equal(getActiveSeason(on(0, 22)), 'lunar');
+});
+
+test('returns null on an off-season day', () => {
+  assert.equal(getActiveSeason(on(5, 15)), null); // Jun 15
+  assert.equal(getActiveSeason(on(6, 4)), null); // Jul 4
+});
+
+test('window boundaries are inclusive at both ends', () => {
+  assert.equal(getActiveSeason(on(1, 10)), 'valentines'); // Feb 10 start
+  assert.equal(getActiveSeason(on(1, 15)), 'valentines'); // Feb 15 end
+  assert.equal(getActiveSeason(on(1, 16)), null); // Feb 16 just after
+});
+
+test('SEASON_DATE_RANGES has a label for every scheduled theme', () => {
+  assert.equal(SEASON_SCHEDULE.length, 11);
+  const themes = SEASON_SCHEDULE.map((e) => e.theme);
+  assert.equal(new Set(themes).size, 11); // unique
+  for (const t of themes) {
+    assert.ok(
+      typeof SEASON_DATE_RANGES[t] === 'string' && SEASON_DATE_RANGES[t].length > 0,
+      `missing date range for ${t}`,
+    );
+  }
+});

src/app/components/seasonal/seasonSchedule.ts

@@ -0,0 +1,95 @@
+import { SeasonTheme } from './types';
+
+/**
+ * Single source of truth for when each seasonal theme auto-activates.
+ *
+ * Both `getActiveSeason` (the runtime "Auto" selector) and the settings UI read
+ * this list, so the date windows shown to the user can never drift from the
+ * dates actually used. Order matters: it is the activation PRIORITY — the first
+ * entry whose window matches wins (e.g. Deep Space outranks Autumn in their
+ * early-October overlap).
+ */
+export type SeasonScheduleEntry = {
+  theme: SeasonTheme;
+  /** Human-readable activation window for display in settings. */
+  dateRange: string;
+  /** Whether this theme is active on the given month (1-12) and day (1-31). */
+  matches: (month: number, day: number) => boolean;
+};
+
+export const SEASON_SCHEDULE: SeasonScheduleEntry[] = [
+  {
+    theme: 'newyear',
+    dateRange: 'Dec 31 – Jan 2',
+    matches: (m, d) => (m === 12 && d === 31) || (m === 1 && d <= 2),
+  },
+  {
+    theme: 'valentines',
+    dateRange: 'Feb 10 – 15',
+    matches: (m, d) => m === 2 && d >= 10 && d <= 15,
+  },
+  {
+    theme: 'stpatricks',
+    dateRange: 'Mar 15 – 18',
+    matches: (m, d) => m === 3 && d >= 15 && d <= 18,
+  },
+  {
+    theme: 'aprilfools',
+    dateRange: 'Apr 1',
+    matches: (m, d) => m === 4 && d === 1,
+  },
+  {
+    theme: 'earthday',
+    dateRange: 'Apr 20 – 23',
+    matches: (m, d) => m === 4 && d >= 20 && d <= 23,
+  },
+  {
+    theme: 'lunar',
+    dateRange: 'Jan 22 – Feb 5',
+    matches: (m, d) => (m === 1 && d >= 22) || (m === 2 && d <= 5),
+  },
+  {
+    theme: 'arcade',
+    dateRange: 'Sep 12',
+    matches: (m, d) => m === 9 && d === 12,
+  },
+  {
+    theme: 'deepspace',
+    dateRange: 'Oct 4 – 10',
+    matches: (m, d) => m === 10 && d >= 4 && d <= 10,
+  },
+  {
+    theme: 'halloween',
+    dateRange: 'Oct 15 – Nov 1',
+    matches: (m, d) => (m === 10 && d >= 15) || (m === 11 && d === 1),
+  },
+  {
+    theme: 'christmas',
+    dateRange: 'Dec 10 – 30',
+    matches: (m, d) => m === 12 && d >= 10,
+  },
+  {
+    theme: 'autumn',
+    dateRange: 'Sep 21 – Oct 14',
+    matches: (m, d) => (m === 9 && d >= 21) || (m === 10 && d <= 14),
+  },
+];
+
+/** Map of theme → human-readable activation window (for settings captions). */
+export const SEASON_DATE_RANGES: Record<SeasonTheme, string> = SEASON_SCHEDULE.reduce(
+  (acc, entry) => {
+    acc[entry.theme] = entry.dateRange;
+    return acc;
+  },
+  {} as Record<SeasonTheme, string>,
+);
+
+/**
+ * The seasonal theme that should be active on `now`, or null if none. First
+ * matching entry in SEASON_SCHEDULE priority order wins.
+ */
+export function getActiveSeason(now: Date): SeasonTheme | null {
+  const month = now.getMonth() + 1; // 1-12
+  const day = now.getDate();
+  return SEASON_SCHEDULE.find((entry) => entry.matches(month, day))?.theme ?? null;
+}

src/app/components/seasonal/themes/AprilFools.css.ts

@@ -0,0 +1,71 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Doodle float-up — a hand-drawn glyph drifts gently upward while bobbing
+ * side to side and lazily rotating, like a thought balloon escaping the page.
+ * GPU-only: transform + opacity exclusively. A tall translateY lets one set of
+ * keyframes serve every doodle; per-element duration/delay/scale add variety.
+ */
+export const animDoodleFloat = keyframes({
+  '0%': { transform: 'translate3d(0, 8vh, 0) rotate(-8deg) scale(0.85)', opacity: '0' },
+  '10%': { opacity: '1' },
+  '35%': { transform: 'translate3d(16px, -28vh, 0) rotate(6deg) scale(1)' },
+  '65%': { transform: 'translate3d(-14px, -64vh, 0) rotate(-5deg) scale(1.04)' },
+  '90%': { opacity: '0.8' },
+  '100%': { transform: 'translate3d(10px, -112vh, 0) rotate(7deg) scale(1.1)', opacity: '0' },
+});
+
+/**
+ * Confetti tumble — a small chip falls while flipping. Reuses a single tall
+ * translateY; the flip (rotate + scaleX) sells the paper tumble cheaply.
+ */
+export const animConfettiTumble = keyframes({
+  '0%': { transform: 'translate3d(0, -8vh, 0) rotate(0deg) scaleX(1)', opacity: '0' },
+  '8%': { opacity: '1' },
+  '50%': { transform: 'translate3d(18px, 50vh, 0) rotate(220deg) scaleX(-1)' },
+  '92%': { opacity: '0.9' },
+  '100%': { transform: 'translate3d(-12px, 112vh, 0) rotate(440deg) scaleX(1)', opacity: '0' },
+});
+
+/**
+ * Playful wobble — an almost-imperceptible skew/rotate of a faux tint layer so
+ * the whole scene feels gently "tickled". Tiny amplitude keeps it from being
+ * disorienting. Transform only, stays on the compositor.
+ */
+export const animWobble = keyframes({
+  '0%': { transform: 'rotate(-0.5deg) skewX(-0.4deg) scale(1.01)' },
+  '50%': { transform: 'rotate(0.5deg) skewX(0.4deg) scale(1.01)' },
+  '100%': { transform: 'rotate(-0.5deg) skewX(-0.4deg) scale(1.01)' },
+});
+
+/**
+ * Pastel aurora drift — a soft rainbow wash high in the scene slides and
+ * breathes. translateX + opacity (never background-position) to stay on GPU.
+ */
+export const animRainbowDrift = keyframes({
+  '0%': { transform: 'translate3d(-5%, 0, 0) scaleY(1)', opacity: '0.55' },
+  '50%': { transform: 'translate3d(5%, 0, 0) scaleY(1.06)', opacity: '0.8' },
+  '100%': { transform: 'translate3d(-5%, 0, 0) scaleY(1)', opacity: '0.55' },
+});
+
+/**
+ * Googly-eye look-around — the pupil layer nudges around its socket, giving
+ * each eye a cheeky wandering gaze. Small translate only.
+ */
+export const animGoogly = keyframes({
+  '0%': { transform: 'translate3d(1.5px, 1px, 0)' },
+  '20%': { transform: 'translate3d(-1.5px, 1.5px, 0)' },
+  '45%': { transform: 'translate3d(1px, -1.5px, 0)' },
+  '70%': { transform: 'translate3d(-1px, -0.5px, 0)' },
+  '100%': { transform: 'translate3d(1.5px, 1px, 0)' },
+});
+
+/**
+ * Sly wink/sparkle — a four-point glint that twinkles open and shut, scaling
+ * and fading like a sly little wink. Transform + opacity only.
+ */
+export const animSparkle = keyframes({
+  '0%, 100%': { transform: 'scale(0.2) rotate(0deg)', opacity: '0' },
+  '40%': { transform: 'scale(1) rotate(35deg)', opacity: '0.9' },
+  '60%': { transform: 'scale(0.95) rotate(45deg)', opacity: '0.7' },
+});

src/app/components/seasonal/themes/AprilFools.tsx

@@ -0,0 +1,409 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animDoodleFloat,
+  animConfettiTumble,
+  animWobble,
+  animRainbowDrift,
+  animGoogly,
+  animSparkle,
+} from './AprilFools.css';
+
+// Deterministic pseudo-random so the scene is identical on every mount and the
+// reduced-motion preview thumbnail is stable. Large primes spread the values.
+const rand = (seed: number) => {
+  const x = Math.sin(seed * 127.1 + 311.7) * 43758.5453;
+  return x - Math.floor(x);
+};
+
+// Bright-but-soft pastel rainbow in oklch. Kept luminous and gentle so the
+// doodles read as crayon pastel over chat without ever fighting the text.
+const PASTELS = [
+  'oklch(0.85 0.12 20)', // pink
+  'oklch(0.88 0.12 90)', // butter yellow
+  'oklch(0.82 0.12 160)', // mint
+  'oklch(0.8 0.12 260)', // periwinkle
+  'oklch(0.84 0.12 320)', // lilac
+  'oklch(0.86 0.11 50)', // peach
+];
+
+// Inline-SVG data-URI doodle glyphs, drawn hand-sketch style (round caps,
+// open paths). `enc()` keeps them CSP-safe — no external assets, no base64.
+const enc = (svg: string) => `url("data:image/svg+xml,${encodeURIComponent(svg)}")`;
+
+// A single rough stroke wrapper helper for the glyph SVGs.
+const stroke = (color: string, body: string) =>
+  `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32' fill='none' ` +
+  `stroke='${color}' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'>${body}</svg>`;
+
+// Question mark — the playful "huh?" centerpiece doodle.
+const glyphQuestion = (c: string) =>
+  stroke(
+    c,
+    `<path d='M11 11 q0 -6 6 -6 q6 0 6 5 q0 4 -5 6 q-2 1 -2 4'/>` +
+      `<circle cx='16' cy='27' r='0.6' fill='${c}'/>`,
+  );
+
+// Exclamation / "bang" — a surprised little doodle.
+const glyphBang = (c: string) =>
+  stroke(c, `<path d='M16 5 L16 20'/><circle cx='16' cy='27' r='0.6' fill='${c}'/>`);
+
+// Squiggle — a loopy scribble that adds whimsy.
+const glyphSquiggle = (c: string) => stroke(c, `<path d='M5 18 q4 -10 8 0 t8 0 t8 0'/>`);
+
+// Five-point doodle star (open-stroke, hand-drawn look).
+const glyphStar = (c: string) =>
+  stroke(
+    c,
+    `<path d='M16 5 L19.4 13 L28 13.6 L21.4 19.2 L23.5 27.6 L16 22.8 L8.5 27.6 ` +
+      `L10.6 19.2 L4 13.6 L12.6 13 Z'/>`,
+  );
+
+// A tiny heart doodle for extra grin.
+const glyphHeart = (c: string) =>
+  stroke(c, `<path d='M16 26 C6 18 7 8 16 12 C25 8 26 18 16 26 Z'/>`);
+
+const GLYPHS = [glyphQuestion, glyphBang, glyphSquiggle, glyphStar, glyphHeart, glyphQuestion];
+
+type Doodle = {
+  left: number;
+  size: number;
+  glyph: string;
+  duration: number;
+  delay: number;
+  startTop: number; // used for the static (reduced) scatter
+  opacity: number;
+};
+
+type Confetti = {
+  left: number;
+  size: number;
+  color: string;
+  duration: number;
+  delay: number;
+  startTop: number;
+  ratio: number; // chip aspect
+  round: boolean;
+};
+
+type Eye = {
+  left: number;
+  top: number;
+  size: number;
+  duration: number;
+  delay: number;
+};
+
+type Spark = {
+  left: number;
+  top: number;
+  size: number;
+  color: string;
+  duration: number;
+  delay: number;
+};
+
+export function AprilFoolsOverlay({ reduced }: SeasonalOverlayProps) {
+  // ~16 drifting doodles. Built once; per-element timing creates the variety.
+  const doodles = useMemo<Doodle[]>(() => {
+    const count = 16;
+    const out: Doodle[] = [];
+    for (let i = 0; i < count; i += 1) {
+      const color = PASTELS[i % PASTELS.length];
+      out.push({
+        left: rand(i + 0.1) * 96 + 2,
+        size: 18 + rand(i + 0.3) * 22,
+        glyph: enc(GLYPHS[i % GLYPHS.length](color)),
+        duration: 16 + rand(i + 0.5) * 12,
+        delay: -rand(i + 0.7) * 26,
+        startTop: rand(i + 0.9) * 92 + 4,
+        opacity: 0.5 + rand(i + 0.2) * 0.32,
+      });
+    }
+    return out;
+  }, []);
+
+  // ~14 confetti chips in a couple of falling bands.
+  const confetti = useMemo<Confetti[]>(() => {
+    const count = 14;
+    const out: Confetti[] = [];
+    for (let i = 0; i < count; i += 1) {
+      out.push({
+        left: rand(i + 3.1) * 98 + 1,
+        size: 5 + rand(i + 3.3) * 6,
+        color: PASTELS[(i + 2) % PASTELS.length],
+        duration: 10 + rand(i + 3.5) * 9,
+        delay: -rand(i + 3.7) * 18,
+        startTop: rand(i + 3.9) * 96 + 2,
+        ratio: 0.45 + rand(i + 3.2) * 0.8,
+        round: rand(i + 3.6) > 0.6,
+      });
+    }
+    return out;
+  }, []);
+
+  // A few googly eyes peeking from corners/edges — the cheeky surprise.
+  const eyes = useMemo<Eye[]>(() => {
+    const anchors = [
+      { left: 6, top: 12 },
+      { left: 90, top: 20 },
+      { left: 80, top: 82 },
+      { left: 14, top: 74 },
+    ];
+    return anchors.map((a, i) => ({
+      left: a.left,
+      top: a.top,
+      size: 22 + rand(i + 5.1) * 12,
+      duration: 3 + rand(i + 5.3) * 2.5,
+      delay: -rand(i + 5.5) * 3,
+    }));
+  }, []);
+
+  // Sly winking sparkles scattered sparsely.
+  const sparks = useMemo<Spark[]>(() => {
+    const count = 5;
+    const out: Spark[] = [];
+    for (let i = 0; i < count; i += 1) {
+      out.push({
+        left: rand(i + 7.1) * 90 + 5,
+        top: rand(i + 7.3) * 84 + 8,
+        size: 12 + rand(i + 7.5) * 12,
+        color: PASTELS[(i + 1) % PASTELS.length],
+        duration: 4 + rand(i + 7.7) * 3,
+        delay: -rand(i + 7.9) * 5,
+      });
+    }
+    return out;
+  }, []);
+
+  // Four-point glint used for the winking sparkles.
+  const sparkGlint = (c: string) =>
+    enc(
+      `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'>` +
+        `<path d='M12 0 C13 8 16 11 24 12 C16 13 13 16 12 24 C11 16 8 13 0 12 C8 11 11 8 12 0 Z' fill='${c}'/></svg>`,
+    );
+
+  return (
+    <>
+      {/* Soft pastel ambient wash — layered oklch radials for depth. Very low
+          opacity so chat text keeps WCAG-AA contrast. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundImage: [
+            'radial-gradient(110% 70% at 18% -8%, oklch(0.85 0.12 20 / 0.1) 0%, transparent 55%)',
+            'radial-gradient(95% 65% at 86% 0%, oklch(0.82 0.12 160 / 0.09) 0%, transparent 58%)',
+            'radial-gradient(120% 80% at 50% 112%, oklch(0.8 0.12 260 / 0.1) 0%, transparent 60%)',
+            'linear-gradient(180deg, oklch(0.88 0.12 90 / 0.05) 0%, transparent 30%, transparent 78%, oklch(0.84 0.12 320 / 0.06) 100%)',
+          ].join(','),
+        }}
+      />
+
+      {/* Faux wobble layer — a near-invisible pastel haze that gently skews so
+          the whole scene feels playfully "tickled". Tiny amplitude = not
+          nauseating. backdrop-filter is one cheap layer for a candy bloom. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: '-2%',
+          contain: 'layout paint style',
+          backdropFilter: 'saturate(1.06) brightness(1.01)',
+          WebkitBackdropFilter: 'saturate(1.06) brightness(1.01)',
+          backgroundImage:
+            'radial-gradient(130% 120% at 50% 45%, transparent 60%, oklch(0.86 0.11 50 / 0.05) 80%, oklch(0.8 0.12 260 / 0.08) 100%)',
+          transformOrigin: '50% 50%',
+          animation: reduced ? 'none' : `${animWobble} 14s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'transform',
+        }}
+      />
+
+      {/* Pastel rainbow aurora high up — soft band of the full palette. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '-8%',
+          left: '-10%',
+          right: '-10%',
+          height: '42%',
+          contain: 'layout paint style',
+          mixBlendMode: 'screen',
+          filter: 'blur(30px)',
+          opacity: reduced ? 0.6 : undefined,
+          backgroundImage: [
+            'radial-gradient(50% 100% at 18% 0%, oklch(0.85 0.12 20 / 0.16) 0%, transparent 72%)',
+            'radial-gradient(50% 100% at 40% 0%, oklch(0.88 0.12 90 / 0.14) 0%, transparent 72%)',
+            'radial-gradient(50% 100% at 62% 0%, oklch(0.82 0.12 160 / 0.14) 0%, transparent 72%)',
+            'radial-gradient(50% 100% at 84% 0%, oklch(0.8 0.12 260 / 0.16) 0%, transparent 72%)',
+          ].join(','),
+          animation: reduced ? 'none' : `${animRainbowDrift} 20s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'transform, opacity',
+        }}
+      />
+
+      {/* Drifting doodles. Motion: rise from below. Reduced: static scatter. */}
+      {doodles.map((d, i) => {
+        const common: React.CSSProperties = {
+          position: 'absolute',
+          left: `${d.left}%`,
+          width: `${d.size}px`,
+          height: `${d.size}px`,
+          backgroundImage: d.glyph,
+          backgroundRepeat: 'no-repeat',
+          backgroundSize: 'contain',
+          backgroundPosition: 'center',
+          opacity: d.opacity,
+          filter: 'drop-shadow(0 1px 1px oklch(0.4 0.05 300 / 0.18))',
+        };
+        if (reduced) {
+          return (
+            <div
+              key={`doodle-${i}`}
+              aria-hidden="true"
+              style={{
+                ...common,
+                top: `${d.startTop}%`,
+                transform: `rotate(${(rand(i + 11) - 0.5) * 24}deg)`,
+              }}
+            />
+          );
+        }
+        return (
+          <div
+            key={`doodle-${i}`}
+            aria-hidden="true"
+            style={{
+              ...common,
+              top: 0,
+              animation: `${animDoodleFloat} ${d.duration}s ease-in-out ${d.delay}s infinite`,
+              willChange: 'transform, opacity',
+            }}
+          />
+        );
+      })}
+
+      {/* Light confetti — tumbling pastel chips. */}
+      {confetti.map((c, i) => {
+        const common: React.CSSProperties = {
+          position: 'absolute',
+          left: `${c.left}%`,
+          width: `${c.size}px`,
+          height: `${c.size * c.ratio}px`,
+          background: c.color,
+          borderRadius: c.round ? '50%' : '1px',
+          opacity: 0.75,
+        };
+        if (reduced) {
+          return (
+            <div
+              key={`confetti-${i}`}
+              aria-hidden="true"
+              style={{
+                ...common,
+                top: `${c.startTop}%`,
+                transform: `rotate(${rand(i + 13) * 360}deg)`,
+              }}
+            />
+          );
+        }
+        return (
+          <div
+            key={`confetti-${i}`}
+            aria-hidden="true"
+            style={{
+              ...common,
+              top: 0,
+              animation: `${animConfettiTumble} ${c.duration}s linear ${c.delay}s infinite`,
+              willChange: 'transform, opacity',
+            }}
+          />
+        );
+      })}
+
+      {/* Googly eyes peeking from the edges — pupil wanders cheekily. */}
+      {eyes.map((e, i) => (
+        <div
+          key={`eye-${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${e.left}%`,
+            top: `${e.top}%`,
+            width: `${e.size}px`,
+            height: `${e.size}px`,
+            marginLeft: `${-e.size / 2}px`,
+            marginTop: `${-e.size / 2}px`,
+            borderRadius: '50%',
+            background:
+              'radial-gradient(circle at 38% 32%, oklch(0.99 0.005 90 / 0.85) 0%, oklch(0.95 0.01 90 / 0.7) 62%, oklch(0.75 0.02 90 / 0.6) 100%)',
+            boxShadow: 'inset 0 0 0 1.5px oklch(0.45 0.03 300 / 0.35)',
+            opacity: 0.6,
+          }}
+        >
+          {/* Pupil */}
+          <div
+            style={{
+              position: 'absolute',
+              left: '50%',
+              top: '50%',
+              width: `${e.size * 0.4}px`,
+              height: `${e.size * 0.4}px`,
+              marginLeft: `${-e.size * 0.2}px`,
+              marginTop: `${-e.size * 0.2}px`,
+              borderRadius: '50%',
+              background:
+                'radial-gradient(circle at 36% 30%, oklch(0.5 0.04 300 / 0.95) 0%, oklch(0.28 0.04 300 / 0.95) 70%)',
+              animation: reduced
+                ? 'none'
+                : `${animGoogly} ${e.duration}s ease-in-out ${e.delay}s infinite`,
+              willChange: reduced ? undefined : 'transform',
+            }}
+          >
+            {/* Catchlight */}
+            <div
+              style={{
+                position: 'absolute',
+                left: '22%',
+                top: '20%',
+                width: '28%',
+                height: '28%',
+                borderRadius: '50%',
+                background: 'oklch(0.99 0.005 90 / 0.85)',
+              }}
+            />
+          </div>
+        </div>
+      ))}
+
+      {/* Sly winking sparkles. Static (reduced) shows them mid-glint. */}
+      {sparks.map((s, i) => (
+        <div
+          key={`spark-${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${s.left}%`,
+            top: `${s.top}%`,
+            width: `${s.size}px`,
+            height: `${s.size}px`,
+            backgroundImage: sparkGlint(s.color),
+            backgroundRepeat: 'no-repeat',
+            backgroundSize: 'contain',
+            backgroundPosition: 'center',
+            filter: `drop-shadow(0 0 3px ${s.color.replace(')', ' / 0.5)')})`,
+            opacity: reduced ? 0.8 : undefined,
+            transform: reduced ? 'scale(0.95) rotate(40deg)' : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animSparkle} ${s.duration}s ease-in-out ${s.delay}s infinite`,
+            willChange: reduced ? undefined : 'transform, opacity',
+          }}
+        />
+      ))}
+    </>
+  );
+}

src/app/components/seasonal/themes/Arcade.css.ts

@@ -0,0 +1,121 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Arcade overlay keyframes — retro synthwave CRT.
+ *
+ * Every animation touches ONLY `transform` and `opacity` so the compositor can
+ * run them on the GPU without triggering layout or paint. keyframes() returns
+ * the generated animation-name string, which is applied inline in Arcade.tsx.
+ *
+ * Motion philosophy: a neon perspective grid scrolls toward the viewer, a soft
+ * CRT scanline field breathes, the whole screen glows and flickers ever so
+ * faintly, sparse pixel sparkles drift up, and an "INSERT COIN" blip pulses.
+ * The grid scroll is done with a translateY on a tiled, perspective-projected
+ * plane — never background-position — so it rides the compositor.
+ */
+
+/**
+ * The neon grid plane is laid out twice its visible height and tiled with the
+ * horizontal rule lines. Translating it up by exactly one tile makes the lines
+ * appear to flow continuously toward the viewer (the horizon). Because the
+ * plane sits under a `perspective` transform, the lines also accelerate as they
+ * approach, giving a true receding-grid illusion. Pure transform.
+ */
+export const animGridScroll = keyframes({
+  '0%': { transform: 'translateZ(0) translateY(0)' },
+  '100%': { transform: 'translateZ(0) translateY(50%)' },
+});
+
+/**
+ * Slow vertical drift of the fine scanline field — a couple of pixels so the
+ * raster looks like it's gently rolling, the way a real CRT does. Transform
+ * only; the line texture itself never moves on the GPU's paint layer.
+ */
+export const animScanRoll = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '100%': { transform: 'translate3d(0, 4px, 0)' },
+});
+
+/**
+ * The overall CRT screen-glow breathes: a barely-there opacity swell that keeps
+ * the static neon tint feeling alive and powered-on. Opacity only.
+ */
+export const animScreenGlow = keyframes({
+  '0%': { opacity: '0.72' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.72' },
+});
+
+/**
+ * A faint, irregular CRT brightness flicker laid over the glow — the classic
+ * unstable-tube shimmer. Kept extremely shallow so it never distracts or harms
+ * readability. Opacity only.
+ */
+export const animCrtFlicker = keyframes({
+  '0%': { opacity: '0.94' },
+  '12%': { opacity: '1' },
+  '20%': { opacity: '0.9' },
+  '34%': { opacity: '0.98' },
+  '52%': { opacity: '0.92' },
+  '70%': { opacity: '1' },
+  '83%': { opacity: '0.95' },
+  '100%': { opacity: '0.94' },
+});
+
+/**
+ * Chromatic-aberration twin: the magenta/cyan fringe layers nudge a sub-pixel
+ * apart and back so the edges shimmer with RGB split, like a misconverged tube.
+ * transform + opacity only.
+ */
+export const animChromaShift = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)', opacity: '0.5' },
+  '50%': { transform: 'translate3d(1.5px, 0, 0)', opacity: '0.8' },
+  '100%': { transform: 'translate3d(0, 0, 0)', opacity: '0.5' },
+});
+
+/**
+ * Pixel sparkle drift: a tiny neon speck rises and twinkles like a coin-burst
+ * particle floating up off the grid. transform + opacity, single tall path.
+ */
+export const animSparkleDrift = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(0.6)', opacity: '0' },
+  '12%': { opacity: '1' },
+  '50%': { transform: 'translate3d(8px, -42vh, 0) scale(1)', opacity: '0.85' },
+  '78%': { transform: 'translate3d(-6px, -70vh, 0) scale(0.8)', opacity: '0.5' },
+  '92%': { opacity: '0.18' },
+  '100%': { transform: 'translate3d(6px, -92vh, 0) scale(0.55)', opacity: '0' },
+});
+
+/**
+ * Independent pixel twinkle layered on the drift so specks blink on/off like a
+ * low-res sprite. Stepped opacity for a crisp 8-bit feel.
+ */
+export const animSparkleTwinkle = keyframes({
+  '0%, 44%': { opacity: '1' },
+  '50%, 94%': { opacity: '0.35' },
+  '100%': { opacity: '1' },
+});
+
+/**
+ * "INSERT COIN" blink: the classic attract-mode pulse. Stepped so it reads as a
+ * hard retro blink rather than a soft fade, but with a brief bright swell.
+ * Opacity + a hair of scale for a CRT bloom feel.
+ */
+export const animCoinBlink = keyframes({
+  '0%': { opacity: '0.85', transform: 'translateX(-50%) scale(1)' },
+  '6%': { opacity: '1', transform: 'translateX(-50%) scale(1.015)' },
+  '12%': { opacity: '0.85', transform: 'translateX(-50%) scale(1)' },
+  '49%': { opacity: '0.85', transform: 'translateX(-50%) scale(1)' },
+  '50%': { opacity: '0', transform: 'translateX(-50%) scale(1)' },
+  '100%': { opacity: '0', transform: 'translateX(-50%) scale(1)' },
+});
+
+/**
+ * Score-blip pulse for the corner HUD glyph: a quick pop then settle, like a
+ * counter ticking up. transform + opacity.
+ */
+export const animScoreBlip = keyframes({
+  '0%': { opacity: '0.4', transform: 'scale(1)' },
+  '50%': { opacity: '0.85', transform: 'scale(1.12)' },
+  '100%': { opacity: '0.4', transform: 'scale(1)' },
+});

src/app/components/seasonal/themes/Arcade.tsx

@@ -0,0 +1,382 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animGridScroll,
+  animScanRoll,
+  animScreenGlow,
+  animCrtFlicker,
+  animChromaShift,
+  animSparkleDrift,
+  animSparkleTwinkle,
+  animCoinBlink,
+  animScoreBlip,
+} from './Arcade.css';
+
+/**
+ * ArcadeOverlay — retro synthwave CRT.
+ *
+ * A full-screen, pointer-events:none ambient decoration. The parent supplies a
+ * fixed inset:0 overflow:hidden pointer-events:none container at the correct
+ * z-index, so this component only returns absolutely-positioned aria-hidden
+ * children and never sets position:fixed / z-index / pointer-events.
+ *
+ * Composition (back to front):
+ *   1. near-black synthwave ambient wash (magenta sky-glow up top, cyan/purple
+ *      pool toward the floor) — layered oklch gradients for depth
+ *   2. a neon perspective grid receding to a vanishing point on the horizon,
+ *      scrolling toward the viewer via transform translateY (never bg-position)
+ *   3. a soft horizon sun-glow + thin neon horizon line where the grid meets sky
+ *   4. drifting pixel sparkles / neon coin-burst specks rising off the grid
+ *   5. fine CRT scanlines, gently rolling
+ *   6. a faint chromatic-aberration fringe at the screen edges
+ *   7. a glowing "INSERT COIN" blip + a corner SCORE HUD glyph
+ *   8. a CRT vignette + screen-glow that frames and protects central text
+ *
+ * All motion is transform/opacity only (compositor-friendly). When `reduced` is
+ * true we render a static-but-gorgeous scene: a still neon grid, steady
+ * scanlines + vignette, and a steady "INSERT COIN" — no `animation` anywhere,
+ * no flicker. The settings preview always passes reduced=true, so the still
+ * form stands on its own.
+ */
+
+// Synthwave neon palette in oklch. Saturated where it glows, but every layer is
+// held at low opacity so it tints rather than takes over the chat beneath.
+const NEON_MAGENTA = 'oklch(0.65 0.25 350)';
+const NEON_CYAN = 'oklch(0.80 0.15 200)';
+const GRID_PURPLE = 'oklch(0.45 0.18 300)';
+
+// The receding grid as an inline SVG data-URI (CSP-safe, no external assets).
+// It is a 1x2 vertical tile of horizontal rule lines + a single set of vertical
+// lines fanning toward a top-center vanishing point. The plane is then placed
+// under a CSS `perspective` rotateX so the lines genuinely recede. Scrolling the
+// tile up by one tile-height (animGridScroll → translateY 50%) loops seamlessly.
+function gridDataUri(): string {
+  const lines: string[] = [];
+  // Horizontal rules — denser toward the top (the horizon) for a perspective
+  // feel even before the CSS rotateX is applied.
+  const rows = [0, 16, 34, 54, 76, 100, 126, 156, 190, 228, 270, 316, 366, 420, 478, 540];
+  rows.forEach((y) => {
+    lines.push(
+      `<line x1='0' y1='${y}' x2='600' y2='${y}' stroke='${GRID_PURPLE}' ` +
+        `stroke-width='1.4' stroke-opacity='0.9'/>`,
+    );
+  });
+  // Vertical lines fanning out from the top-center vanishing point.
+  for (let i = -7; i <= 7; i += 1) {
+    const topX = 300 + i * 6; // tight near the horizon
+    const botX = 300 + i * 95; // wide at the foreground
+    lines.push(
+      `<line x1='${topX}' y1='0' x2='${botX}' y2='600' stroke='${GRID_PURPLE}' ` +
+        `stroke-width='1.4' stroke-opacity='0.8'/>`,
+    );
+  }
+  const svg =
+    `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 600 600' ` +
+    `preserveAspectRatio='none'>${lines.join('')}</svg>`;
+  return `url("data:image/svg+xml,${encodeURIComponent(svg)}")`;
+}
+
+type Sparkle = {
+  left: number; // vw
+  bottom: number; // % up from floor where it spawns
+  size: number; // px
+  duration: number; // s
+  delay: number; // s
+  twinkle: number; // s
+  hue: 'magenta' | 'cyan';
+  opacity: number;
+};
+
+// Hand-placed still sparkles for the reduced/static scene — a few neon specks
+// resting low over the grid, away from the busy chat center.
+const RESTING_SPARKLES: ReadonlyArray<{
+  left: number;
+  bottom: number;
+  size: number;
+  hue: 'magenta' | 'cyan';
+  opacity: number;
+}> = [
+  { left: 12, bottom: 18, size: 4, hue: 'cyan', opacity: 0.5 },
+  { left: 26, bottom: 30, size: 3, hue: 'magenta', opacity: 0.42 },
+  { left: 78, bottom: 22, size: 4, hue: 'magenta', opacity: 0.5 },
+  { left: 88, bottom: 34, size: 3, hue: 'cyan', opacity: 0.4 },
+  { left: 50, bottom: 14, size: 3, hue: 'cyan', opacity: 0.38 },
+];
+
+const GRID_URI = gridDataUri();
+
+export function ArcadeOverlay({ reduced }: SeasonalOverlayProps) {
+  // Deterministic sparkle field, computed ONCE. No per-frame state.
+  const sparkles = useMemo<Sparkle[]>(() => {
+    const COUNT = 16;
+    return Array.from({ length: COUNT }, (_, i) => ({
+      left: (i * 6.27 + 4) % 100,
+      bottom: (i * 3.7) % 28, // spawn in the lower third (over the grid)
+      size: 2 + (i % 3), // 2..4 px pixels
+      duration: 14 + (i % 6) * 2.2,
+      delay: -((i * 1.83) % 16),
+      twinkle: 1.4 + (i % 4) * 0.5,
+      hue: i % 2 === 0 ? 'cyan' : 'magenta',
+      opacity: 0.45 + (i % 3) * 0.12,
+    }));
+  }, []);
+
+  const sparkleColor = (hue: 'magenta' | 'cyan') => (hue === 'cyan' ? NEON_CYAN : NEON_MAGENTA);
+
+  return (
+    <>
+      {/* 1. Near-black synthwave ambient wash. Magenta sky-glow up top, a
+            cyan/purple pool toward the floor, and an overall dark vertical
+            grade. Layered oklch gradients give depth at very low opacity. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          backgroundImage: [
+            'radial-gradient(140% 80% at 50% -8%, oklch(0.65 0.25 350 / 0.16) 0%, transparent 55%)',
+            'radial-gradient(120% 70% at 50% 112%, oklch(0.45 0.18 300 / 0.20) 0%, transparent 60%)',
+            'linear-gradient(180deg, oklch(0.12 0.05 300 / 0.10) 0%, transparent 38%, oklch(0.10 0.06 310 / 0.16) 100%)',
+          ].join(','),
+          contain: 'layout paint style',
+        }}
+      />
+
+      {/* 2. The neon perspective grid. A wide, tall plane is tilted away from
+            the viewer with `perspective` + rotateX so its rule lines recede to
+            a vanishing point at the top (the horizon). It lives in the lower
+            half of the screen — the "floor". The inner plane scrolls upward by
+            one tile via transform translateY, which reads as the grid flowing
+            toward the viewer. Pure transform; never background-position. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          left: '-25%',
+          right: '-25%',
+          bottom: 0,
+          height: '62%',
+          overflow: 'hidden',
+          perspective: '280px',
+          perspectiveOrigin: '50% 0%',
+          maskImage: 'linear-gradient(180deg, transparent 0%, #000 26%, #000 100%)',
+          WebkitMaskImage: 'linear-gradient(180deg, transparent 0%, #000 26%, #000 100%)',
+          opacity: reduced ? 0.5 : 0.62,
+          contain: 'layout paint style',
+        }}
+      >
+        <div
+          style={{
+            position: 'absolute',
+            left: 0,
+            right: 0,
+            top: 0,
+            height: '200%',
+            transformOrigin: 'top center',
+            transform: 'rotateX(74deg)',
+            backgroundImage: GRID_URI,
+            backgroundRepeat: 'repeat-y',
+            backgroundSize: '100% 50%',
+            filter: 'drop-shadow(0 0 3px oklch(0.55 0.22 320 / 0.6))',
+            willChange: reduced ? undefined : 'transform',
+            animation: reduced ? 'none' : `${animGridScroll} 7s linear infinite`,
+          }}
+        />
+      </div>
+
+      {/* 3. Horizon glow + neon horizon line. A soft synthwave sun-bloom sits
+            where the grid meets the sky, with a thin bright rule on top of it
+            to seal the vanishing point. Static (no motion) either way. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          left: '50%',
+          top: '38%',
+          width: '70%',
+          height: '34%',
+          transform: 'translate(-50%, -50%)',
+          backgroundImage:
+            'radial-gradient(60% 100% at 50% 100%, oklch(0.70 0.22 350 / 0.22) 0%, oklch(0.65 0.18 330 / 0.10) 40%, transparent 72%)',
+          contain: 'layout paint style',
+        }}
+      />
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          left: '12%',
+          right: '12%',
+          top: '38%',
+          height: '1.5px',
+          background: `linear-gradient(90deg, transparent 0%, ${NEON_CYAN} 25%, oklch(0.92 0.10 320 / 0.95) 50%, ${NEON_CYAN} 75%, transparent 100%)`,
+          opacity: 0.55,
+          filter: 'blur(0.4px) drop-shadow(0 0 4px oklch(0.78 0.16 200 / 0.7))',
+        }}
+      />
+
+      {/* 4. Drifting pixel sparkles / neon coin-burst specks. Tiny square
+            neon pixels rising off the grid and twinkling. The static scene uses
+            a small resting set instead. */}
+      {reduced
+        ? RESTING_SPARKLES.map((s, i) => (
+            <div
+              key={`rest-spark-${i}`}
+              aria-hidden="true"
+              style={{
+                position: 'absolute',
+                left: `${s.left}%`,
+                bottom: `${s.bottom}%`,
+                width: `${s.size}px`,
+                height: `${s.size}px`,
+                background: sparkleColor(s.hue),
+                opacity: s.opacity,
+                boxShadow: `0 0 6px ${sparkleColor(s.hue)}`,
+              }}
+            />
+          ))
+        : sparkles.map((s, i) => (
+            <div
+              key={`spark-${i}`}
+              aria-hidden="true"
+              style={{
+                position: 'absolute',
+                left: `${s.left}%`,
+                bottom: `${s.bottom}%`,
+                width: `${s.size}px`,
+                height: `${s.size}px`,
+                willChange: 'transform, opacity',
+                animation: `${animSparkleDrift} ${s.duration}s linear ${s.delay}s infinite`,
+              }}
+            >
+              <div
+                style={{
+                  width: '100%',
+                  height: '100%',
+                  background: sparkleColor(s.hue),
+                  opacity: s.opacity,
+                  boxShadow: `0 0 6px ${sparkleColor(s.hue)}`,
+                  animation: `${animSparkleTwinkle} ${s.twinkle}s step-end infinite`,
+                }}
+              />
+            </div>
+          ))}
+
+      {/* 5. Fine CRT scanlines. A repeating 1px dark rule field over the whole
+            screen, gently rolling downward on the compositor (transform only).
+            Held faint so text stays crisp. The pattern is in a child taller
+            than the frame so the roll never reveals an edge. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          overflow: 'hidden',
+          mixBlendMode: 'multiply',
+          opacity: 0.5,
+          contain: 'layout paint style',
+        }}
+      >
+        <div
+          style={{
+            position: 'absolute',
+            left: 0,
+            right: 0,
+            top: '-8px',
+            bottom: '-8px',
+            backgroundImage:
+              'repeating-linear-gradient(0deg, oklch(0.10 0.04 300 / 0.55) 0px, oklch(0.10 0.04 300 / 0.55) 1px, transparent 1px, transparent 3px)',
+            willChange: reduced ? undefined : 'transform',
+            animation: reduced ? 'none' : `${animScanRoll} 6s linear infinite`,
+          }}
+        />
+      </div>
+
+      {/* 6. Chromatic-aberration fringe. Two thin edge-glows — magenta and cyan —
+            offset a sub-pixel apart at the screen border so the frame shimmers
+            with an RGB split, like a misconverged tube. Animated only; in the
+            static scene it sits as a steady fringe. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          boxShadow: `inset 2px 0 14px oklch(0.65 0.25 350 / 0.16), inset -2px 0 14px oklch(0.80 0.15 200 / 0.16)`,
+          opacity: reduced ? 0.6 : undefined,
+          willChange: reduced ? undefined : 'transform, opacity',
+          contain: 'layout paint style',
+          animation: reduced ? 'none' : `${animChromaShift} 4.5s ease-in-out infinite`,
+        }}
+      />
+
+      {/* 7a. Glowing "INSERT COIN" attract-mode blip, low-opacity, bottom-center.
+             Static scene shows it steady (no blink). */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          bottom: '5%',
+          left: '50%',
+          transform: 'translateX(-50%)',
+          fontFamily: '"Courier New", monospace',
+          fontSize: '12px',
+          fontWeight: 700,
+          letterSpacing: '0.32em',
+          color: NEON_CYAN,
+          textShadow: '0 0 6px oklch(0.80 0.15 200 / 0.9), 0 0 14px oklch(0.65 0.25 350 / 0.5)',
+          userSelect: 'none',
+          whiteSpace: 'nowrap',
+          opacity: reduced ? 0.6 : undefined,
+          animation: reduced ? 'none' : `${animCoinBlink} 1.6s step-end infinite`,
+        }}
+      >
+        INSERT COIN
+      </div>
+
+      {/* 7b. Corner SCORE HUD glyph — a tiny pixel score that blips, top-left,
+             very low opacity so it reads as ambient chrome, not UI. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '2.5%',
+          left: '2%',
+          fontFamily: '"Courier New", monospace',
+          fontSize: '10px',
+          fontWeight: 700,
+          letterSpacing: '0.18em',
+          color: NEON_MAGENTA,
+          textShadow: '0 0 6px oklch(0.65 0.25 350 / 0.8)',
+          userSelect: 'none',
+          whiteSpace: 'nowrap',
+          opacity: reduced ? 0.5 : undefined,
+          animation: reduced ? 'none' : `${animScoreBlip} 2.4s ease-in-out infinite`,
+        }}
+      >
+        1UP 00<span style={{ color: NEON_CYAN }}>0000</span>
+      </div>
+
+      {/* 8. CRT vignette + screen-glow. A radial darkening frames the corners,
+            with a faint magenta tube-glow swell. The vignette protects central
+            chat-text contrast. Static scene holds it steady; live scene adds a
+            shallow breathing glow + irregular flicker, both opacity-only. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          backgroundImage: [
+            'radial-gradient(125% 95% at 50% 46%, oklch(0.72 0.18 340 / 0.05) 0%, transparent 40%)',
+            'radial-gradient(120% 115% at 50% 50%, transparent 50%, oklch(0.10 0.05 310 / 0.20) 84%, oklch(0.06 0.04 305 / 0.34) 100%)',
+          ].join(','),
+          contain: 'layout paint style',
+          opacity: reduced ? 1 : undefined,
+          willChange: reduced ? undefined : 'opacity',
+          animation: reduced
+            ? 'none'
+            : `${animScreenGlow} 8s ease-in-out infinite, ${animCrtFlicker} 5.5s steps(1, end) infinite`,
+        }}
+      />
+    </>
+  );
+}

src/app/components/seasonal/themes/Autumn.css.ts

@@ -0,0 +1,91 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Autumn overlay keyframes. Every animation touches ONLY `transform` and
+ * `opacity` so the compositor can run them on the GPU without triggering
+ * layout or paint. keyframes() returns the generated animation-name string,
+ * which is applied inline in Autumn.tsx.
+ *
+ * Motion philosophy: warm, slow, cozy. Leaves tumble and rotate as they fall
+ * with a per-leaf sway decoupled on a wrapper; sun shafts breathe; dust motes
+ * drift up through the light; the whole frame has a barely-there warm pulse.
+ */
+
+/**
+ * A leaf falls from above to below the viewport while continuously rotating.
+ * A single tall translateY serves every leaf — per-leaf duration/delay/scale
+ * create the parallax variety. Horizontal travel is intentionally small here
+ * because the real lateral motion comes from the sway wrapper below.
+ */
+export const animLeafFall = keyframes({
+  '0%': { transform: 'translate3d(0, -12vh, 0) rotate(-30deg)', opacity: '0' },
+  '8%': { opacity: '1' },
+  '50%': { transform: 'translate3d(10px, 50vh, 0) rotate(200deg)' },
+  '92%': { opacity: '0.85' },
+  '100%': { transform: 'translate3d(-6px, 114vh, 0) rotate(430deg)', opacity: '0' },
+});
+
+/**
+ * Lateral sway applied to a leaf's wrapper so the descent reads as wind
+ * catching the blade. Decoupled from the fall so the two compose into an
+ * organic, non-repeating-looking path.
+ */
+export const animLeafSway = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '50%': { transform: 'translate3d(34px, 0, 0)' },
+  '100%': { transform: 'translate3d(0, 0, 0)' },
+});
+
+/**
+ * A second flutter on the leaf's inner shape: a gentle skew/scale wobble that
+ * mimics the blade catching air as it spins. Cheap, transform-only.
+ */
+export const animLeafFlutter = keyframes({
+  '0%': { transform: 'rotate(-8deg) scaleX(1)' },
+  '50%': { transform: 'rotate(8deg) scaleX(0.82)' },
+  '100%': { transform: 'rotate(-8deg) scaleX(1)' },
+});
+
+/**
+ * Low-sun light shaft: a long soft beam slowly slides and breathes. Uses
+ * translateX + opacity (never background-position) so it stays on the
+ * compositor. Scale on Y makes the beam subtly elongate as it brightens.
+ */
+export const animSunShaft = keyframes({
+  '0%': { transform: 'translate3d(-4%, 0, 0) scaleY(1)', opacity: '0.4' },
+  '50%': { transform: 'translate3d(4%, 0, 0) scaleY(1.06)', opacity: '0.75' },
+  '100%': { transform: 'translate3d(-4%, 0, 0) scaleY(1)', opacity: '0.4' },
+});
+
+/**
+ * Dust / pollen mote: a tiny speck drifts upward through the light, swaying,
+ * pulsing softly in brightness as it catches the sun. transform + opacity.
+ */
+export const animMoteDrift = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(0.7)', opacity: '0' },
+  '15%': { opacity: '0.85' },
+  '40%': { transform: 'translate3d(16px, -30vh, 0) scale(1)' },
+  '70%': { transform: 'translate3d(-12px, -58vh, 0) scale(0.85)', opacity: '0.6' },
+  '90%': { opacity: '0.2' },
+  '100%': { transform: 'translate3d(10px, -84vh, 0) scale(0.6)', opacity: '0' },
+});
+
+/**
+ * Independent twinkle for motes — a brightness flicker layered on the drift so
+ * specks shimmer as if turning in the light. Opacity only.
+ */
+export const animMoteTwinkle = keyframes({
+  '0%': { opacity: '0.5' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.5' },
+});
+
+/**
+ * Barely-there breathing of the warm vignette frame so the static tint feels
+ * alive without any distracting motion. Opacity only.
+ */
+export const animEmberPulse = keyframes({
+  '0%': { opacity: '0.82' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.82' },
+});

src/app/components/seasonal/themes/Autumn.tsx

@@ -0,0 +1,310 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animLeafFall,
+  animLeafSway,
+  animLeafFlutter,
+  animSunShaft,
+  animMoteDrift,
+  animMoteTwinkle,
+  animEmberPulse,
+} from './Autumn.css';
+
+/**
+ * AutumnOverlay — warm falling leaves.
+ *
+ * A full-screen, pointer-events:none ambient decoration. The parent supplies a
+ * fixed inset:0 overflow:hidden pointer-events:none container at the correct
+ * z-index, so this component only returns absolutely-positioned aria-hidden
+ * children and never sets position:fixed / z-index / pointer-events.
+ *
+ * Composition (back to front):
+ *   1. amber -> rust ambient gradient wash (cozy low-sun atmosphere)
+ *   2. soft angled sun shafts breathing high across the scene
+ *   3. drifting pollen / dust motes catching the light
+ *   4. maple & oak leaf silhouettes tumbling and rotating as they fall
+ *   5. a warm low-saturation vignette that frames + protects text contrast
+ *
+ * All motion is transform/opacity only (compositor-friendly). When `reduced`
+ * is true we render a static-but-gorgeous scene: a handful of leaves at rest,
+ * still sun shafts, and the warm vignette — no `animation` anywhere. The
+ * settings preview always passes reduced=true, so the still form stands alone.
+ */
+
+// Warm autumn palette in oklch. Kept low-saturation enough to never fight the
+// chat text underneath. Each leaf picks a tone for variety.
+const LEAF_TONES = [
+  'oklch(0.75 0.15 70)', // amber
+  'oklch(0.55 0.16 40)', // rust
+  'oklch(0.82 0.13 85)', // warm gold
+  'oklch(0.62 0.16 55)', // burnt orange
+  'oklch(0.5 0.14 35)', // deep ember
+];
+
+// Two leaf silhouettes as inline SVG path data (no external assets, CSP-safe).
+// `maple` = classic five-lobed maple; `oak` = rounded-lobe oak blade.
+const MAPLE_PATH =
+  'M50 4 L57 30 L78 18 L66 40 L92 40 L70 52 L84 74 L58 62 L56 92 L50 70 ' +
+  'L44 92 L42 62 L16 74 L30 52 L8 40 L34 40 L22 18 L43 30 Z';
+const OAK_PATH =
+  'M50 4 C58 14 56 22 64 24 C74 22 74 32 68 36 C78 38 76 48 68 50 ' +
+  'C78 54 74 64 66 64 C70 74 60 78 54 72 C54 84 50 96 50 96 ' +
+  'C50 96 46 84 46 72 C40 78 30 74 34 64 C26 64 22 54 32 50 ' +
+  'C24 48 22 38 32 36 C26 32 26 22 36 24 C44 22 42 14 50 4 Z';
+
+/** Build a CSS-ready data-URI of a single tinted leaf silhouette. */
+function leafDataUri(kind: 'maple' | 'oak', fill: string): string {
+  const path = kind === 'maple' ? MAPLE_PATH : OAK_PATH;
+  // A faint vein line gives the blade depth without extra DOM nodes.
+  const svg =
+    `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'>` +
+    `<path d='${path}' fill='${fill}' fill-opacity='0.92'/>` +
+    `<path d='M50 96 L50 24' stroke='oklch(0.42 0.12 38)' stroke-opacity='0.35' ` +
+    `stroke-width='2.5' fill='none' stroke-linecap='round'/>` +
+    `</svg>`;
+  return `url("data:image/svg+xml,${encodeURIComponent(svg)}")`;
+}
+
+type Leaf = {
+  kind: 'maple' | 'oak';
+  uri: string;
+  left: number; // vw column
+  size: number; // px
+  duration: number; // s — fall time
+  delay: number; // s
+  swayDuration: number; // s — wrapper sway
+  flutterDuration: number; // s — inner flutter
+  tilt: number; // deg — resting rotation (used for static scene)
+  opacity: number;
+};
+
+type Mote = {
+  left: number;
+  bottom: number;
+  size: number;
+  duration: number;
+  delay: number;
+  twinkle: number;
+  opacity: number;
+};
+
+// A few hand-placed leaves at rest for the reduced/static scene — arranged so
+// they read as "settled" near edges and corners, never over the busy center.
+const RESTING_LEAVES: ReadonlyArray<{
+  kind: 'maple' | 'oak';
+  left: number;
+  top: number;
+  size: number;
+  tilt: number;
+  tone: number;
+  opacity: number;
+}> = [
+  { kind: 'maple', left: 6, top: 14, size: 46, tilt: -22, tone: 0, opacity: 0.4 },
+  { kind: 'oak', left: 88, top: 22, size: 38, tilt: 28, tone: 1, opacity: 0.34 },
+  { kind: 'maple', left: 16, top: 78, size: 54, tilt: 16, tone: 3, opacity: 0.42 },
+  { kind: 'oak', left: 80, top: 82, size: 44, tilt: -34, tone: 4, opacity: 0.36 },
+  { kind: 'maple', left: 50, top: 90, size: 40, tilt: 8, tone: 2, opacity: 0.32 },
+  { kind: 'oak', left: 70, top: 8, size: 32, tilt: -12, tone: 2, opacity: 0.3 },
+];
+
+export function AutumnOverlay({ reduced }: SeasonalOverlayProps) {
+  // Deterministic pseudo-random field, computed ONCE. No per-frame state.
+  const { leaves, motes } = useMemo(() => {
+    const LEAF_COUNT = 16;
+    const MOTE_COUNT = 12;
+
+    const builtLeaves: Leaf[] = Array.from({ length: LEAF_COUNT }, (_, i) => {
+      const kind: 'maple' | 'oak' = i % 3 === 0 ? 'oak' : 'maple';
+      const tone = LEAF_TONES[i % LEAF_TONES.length];
+      const sizeBucket = i % 4; // 0..3 → depth bucket for parallax
+      const size = 22 + sizeBucket * 9; // 22..49 px
+      return {
+        kind,
+        uri: leafDataUri(kind, tone),
+        left: (i * 6.13 + 4) % 100,
+        size,
+        // Larger (nearer) leaves fall a touch faster; all slow + cozy.
+        duration: 16 - sizeBucket * 1.6 + (i % 3) * 1.3,
+        delay: -((i * 1.37) % 16), // negative → staggered, already mid-fall
+        swayDuration: 5 + (i % 5) * 0.8,
+        flutterDuration: 1.6 + (i % 4) * 0.45,
+        tilt: ((i * 53) % 70) - 35,
+        opacity: 0.34 + sizeBucket * 0.08, // nearer → slightly bolder
+      };
+    });
+
+    const builtMotes: Mote[] = Array.from({ length: MOTE_COUNT }, (_, i) => ({
+      left: (i * 8.7 + 5) % 100,
+      bottom: (i * 4.3) % 30, // start in lower third, drift up
+      size: 2 + (i % 3),
+      duration: 16 + (i % 6) * 2.4,
+      delay: -((i * 2.1) % 16),
+      twinkle: 2.2 + (i % 4) * 0.6,
+      opacity: 0.4 + (i % 3) * 0.12,
+    }));
+
+    return { leaves: builtLeaves, motes: builtMotes };
+  }, []);
+
+  return (
+    <>
+      {/* 1. Ambient amber → rust atmospheric wash. Layered oklch gradients give
+            depth: a warm low-sun glow from the upper-left, a rust pool at the
+            base, and a faint gold core. Kept very low opacity. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          backgroundImage: [
+            'radial-gradient(120% 90% at 18% 8%, oklch(0.82 0.13 85 / 0.16) 0%, transparent 55%)',
+            'radial-gradient(130% 100% at 50% 118%, oklch(0.55 0.16 40 / 0.18) 0%, transparent 60%)',
+            'linear-gradient(180deg, oklch(0.75 0.15 70 / 0.07) 0%, transparent 40%, oklch(0.5 0.14 35 / 0.08) 100%)',
+          ].join(','),
+          contain: 'layout paint style',
+        }}
+      />
+
+      {/* 2. Soft angled low-sun light shafts. Two long beams skewed to suggest
+            late-afternoon light raking across the room. */}
+      {[
+        { left: -8, rotate: 18, w: 38, opacity: 0.5, dur: 17, delay: 0 },
+        { left: 46, rotate: 14, w: 30, opacity: 0.38, dur: 22, delay: -6 },
+        { left: 78, rotate: 22, w: 26, opacity: 0.32, dur: 19, delay: -11 },
+      ].map((shaft, i) => (
+        <div
+          key={`shaft-${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            top: '-30%',
+            left: `${shaft.left}%`,
+            width: `${shaft.w}vw`,
+            height: '160%',
+            transformOrigin: 'top center',
+            transform: `rotate(${shaft.rotate}deg)`,
+            backgroundImage:
+              'linear-gradient(90deg, transparent 0%, oklch(0.85 0.12 82 / 0.5) 50%, transparent 100%)',
+            filter: 'blur(14px)',
+            mixBlendMode: 'screen',
+            opacity: reduced ? shaft.opacity * 0.85 : undefined,
+            willChange: reduced ? undefined : 'transform, opacity',
+            contain: 'layout paint style',
+            animation: reduced
+              ? 'none'
+              : `${animSunShaft} ${shaft.dur}s ease-in-out ${shaft.delay}s infinite`,
+          }}
+        />
+      ))}
+
+      {/* 3. Drifting pollen / dust motes catching the light. Static scene omits
+            them — stillness reads cleaner at rest. */}
+      {!reduced &&
+        motes.map((m, i) => (
+          <div
+            key={`mote-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${m.left}%`,
+              bottom: `${m.bottom}%`,
+              width: `${m.size}px`,
+              height: `${m.size}px`,
+              willChange: 'transform, opacity',
+              animation: `${animMoteDrift} ${m.duration}s linear ${m.delay}s infinite`,
+            }}
+          >
+            <div
+              style={{
+                width: '100%',
+                height: '100%',
+                borderRadius: '50%',
+                background:
+                  'radial-gradient(circle, oklch(0.88 0.1 85 / 0.95) 0%, oklch(0.78 0.12 70 / 0.4) 60%, transparent 100%)',
+                opacity: m.opacity,
+                animation: `${animMoteTwinkle} ${m.twinkle}s ease-in-out infinite`,
+              }}
+            />
+          </div>
+        ))}
+
+      {/* 4. Falling / resting maple & oak leaves. */}
+      {reduced
+        ? RESTING_LEAVES.map((leaf, i) => (
+            <div
+              key={`rest-${i}`}
+              aria-hidden="true"
+              style={{
+                position: 'absolute',
+                left: `${leaf.left}%`,
+                top: `${leaf.top}%`,
+                width: `${leaf.size}px`,
+                height: `${leaf.size}px`,
+                backgroundImage: leafDataUri(leaf.kind, LEAF_TONES[leaf.tone]),
+                backgroundSize: 'contain',
+                backgroundRepeat: 'no-repeat',
+                transform: `translate(-50%, -50%) rotate(${leaf.tilt}deg)`,
+                opacity: leaf.opacity,
+                filter: 'drop-shadow(0 2px 3px oklch(0.3 0.08 40 / 0.35))',
+              }}
+            />
+          ))
+        : leaves.map((leaf, i) => (
+            // Sway wrapper: horizontal wind motion, decoupled from the fall.
+            <div
+              key={`leaf-${i}`}
+              aria-hidden="true"
+              style={{
+                position: 'absolute',
+                top: 0,
+                left: `${leaf.left}%`,
+                width: `${leaf.size}px`,
+                height: `${leaf.size}px`,
+                willChange: 'transform',
+                contain: 'layout paint style',
+                animation: `${animLeafSway} ${leaf.swayDuration}s ease-in-out ${leaf.delay}s infinite`,
+              }}
+            >
+              {/* Fall wrapper: vertical descent + tumble rotation. */}
+              <div
+                style={{
+                  width: '100%',
+                  height: '100%',
+                  willChange: 'transform, opacity',
+                  animation: `${animLeafFall} ${leaf.duration}s linear ${leaf.delay}s infinite`,
+                }}
+              >
+                {/* Inner blade: the actual silhouette + flutter wobble. */}
+                <div
+                  style={{
+                    width: '100%',
+                    height: '100%',
+                    backgroundImage: leaf.uri,
+                    backgroundSize: 'contain',
+                    backgroundRepeat: 'no-repeat',
+                    opacity: leaf.opacity,
+                    filter: 'drop-shadow(0 1px 2px oklch(0.3 0.08 40 / 0.3))',
+                    animation: `${animLeafFlutter} ${leaf.flutterDuration}s ease-in-out infinite`,
+                  }}
+                />
+              </div>
+            </div>
+          ))}
+
+      {/* 5. Warm low-saturation vignette. Frames the scene and gently darkens
+            edges — protecting central chat text contrast. Breathes faintly. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          backgroundImage:
+            'radial-gradient(120% 110% at 50% 45%, transparent 52%, oklch(0.38 0.07 45 / 0.14) 82%, oklch(0.3 0.06 40 / 0.22) 100%)',
+          contain: 'layout paint style',
+          opacity: reduced ? 1 : undefined,
+          animation: reduced ? 'none' : `${animEmberPulse} 9s ease-in-out infinite`,
+        }}
+      />
+    </>
+  );
+}

src/app/components/seasonal/themes/Christmas.css.ts

@@ -0,0 +1,56 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Snowfall — a flake drifts downward while swaying horizontally and slowly
+ * rotating. GPU-only: animates transform + opacity exclusively. The vertical
+ * travel uses a tall translateY so a single keyframe set serves all flakes;
+ * per-flake duration/delay/scale create the parallax variety.
+ */
+export const animSnowFall = keyframes({
+  '0%': { transform: 'translate3d(0, -8vh, 0) rotate(0deg)', opacity: '0' },
+  '8%': { opacity: '1' },
+  '50%': { transform: 'translate3d(14px, 50vh, 0) rotate(180deg)' },
+  '92%': { opacity: '0.85' },
+  '100%': { transform: 'translate3d(-10px, 112vh, 0) rotate(360deg)', opacity: '0' },
+});
+
+/**
+ * Gentle lateral sway applied to a flake's wrapper so the drift reads as wind,
+ * decoupled from the fall so the two combine into an organic path.
+ */
+export const animSnowSway = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '50%': { transform: 'translate3d(18px, 0, 0)' },
+  '100%': { transform: 'translate3d(0, 0, 0)' },
+});
+
+/**
+ * String-light breathing — bokeh orbs softly pulse in brightness and scale,
+ * like incandescent bulbs warming and cooling. Opacity + transform only.
+ */
+export const animBulbBreathe = keyframes({
+  '0%': { transform: 'scale(0.92)', opacity: '0.55' },
+  '50%': { transform: 'scale(1.08)', opacity: '0.95' },
+  '100%': { transform: 'scale(0.92)', opacity: '0.55' },
+});
+
+/**
+ * Aurora shimmer — a wide soft band high in the scene slowly slides and
+ * breathes. Uses translateX + opacity (never background-position) so it stays
+ * on the compositor.
+ */
+export const animAurora = keyframes({
+  '0%': { transform: 'translate3d(-6%, 0, 0) scaleY(1)', opacity: '0.5' },
+  '50%': { transform: 'translate3d(6%, 0, 0) scaleY(1.08)', opacity: '0.8' },
+  '100%': { transform: 'translate3d(-6%, 0, 0) scaleY(1)', opacity: '0.5' },
+});
+
+/**
+ * Vignette frost — a barely-there breathing of the cold frame so the static
+ * tint feels alive without distracting motion.
+ */
+export const animFrostPulse = keyframes({
+  '0%': { opacity: '0.85' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.85' },
+});

src/app/components/seasonal/themes/Christmas.tsx

@@ -0,0 +1,256 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animSnowFall,
+  animSnowSway,
+  animBulbBreathe,
+  animAurora,
+  animFrostPulse,
+} from './Christmas.css';
+
+// Deterministic pseudo-random so the scene is identical every mount (no React
+// state per frame). Large primes keep the distribution well spread.
+const rand = (seed: number) => {
+  const x = Math.sin(seed * 127.1 + 311.7) * 43758.5453;
+  return x - Math.floor(x);
+};
+
+// Warm incandescent string-light hues in oklch — gold, soft red, cool white,
+// pine green, icy blue. Kept luminous and gentle so they read as bokeh glow.
+const BULB_COLORS = [
+  'oklch(0.85 0.12 85)', // warm gold
+  'oklch(0.72 0.15 28)', // soft red
+  'oklch(0.95 0.03 230)', // icy white
+  'oklch(0.78 0.13 150)', // pine green
+  'oklch(0.8 0.1 235)', // cool blue
+];
+
+type Flake = {
+  left: number;
+  size: number;
+  duration: number;
+  delay: number;
+  swayDuration: number;
+  opacity: number;
+  blur: number;
+};
+
+type Bulb = {
+  left: number;
+  top: number;
+  size: number;
+  color: string;
+  duration: number;
+  delay: number;
+};
+
+export function ChristmasOverlay({ reduced }: SeasonalOverlayProps) {
+  // Three parallax bands of snow: far (small/slow/dim) -> near (large/fast).
+  const flakes = useMemo<Flake[]>(() => {
+    const bands = [
+      { count: 12, size: [1.5, 2.5], dur: [16, 22], op: [0.35, 0.55], blur: 0.6 },
+      { count: 10, size: [2.5, 4], dur: [11, 15], op: [0.55, 0.8], blur: 0.3 },
+      { count: 8, size: [4, 6.5], dur: [8, 11], op: [0.7, 0.95], blur: 0 },
+    ];
+    const out: Flake[] = [];
+    let s = 1;
+    bands.forEach((b) => {
+      for (let i = 0; i < b.count; i += 1) {
+        const r1 = rand(s);
+        const r2 = rand(s + 0.37);
+        const r3 = rand(s + 0.71);
+        const r4 = rand(s + 0.91);
+        out.push({
+          left: r1 * 100,
+          size: b.size[0] + r2 * (b.size[1] - b.size[0]),
+          duration: b.dur[0] + r3 * (b.dur[1] - b.dur[0]),
+          delay: -r4 * (b.dur[1] + 4),
+          swayDuration: 4 + r2 * 5,
+          opacity: b.op[0] + r3 * (b.op[1] - b.op[0]),
+          blur: b.blur,
+        });
+        s += 1;
+      }
+    });
+    return out;
+  }, []);
+
+  // Bokeh string lights strung along the very top edge, gently sagging.
+  const bulbs = useMemo<Bulb[]>(() => {
+    const count = 9;
+    const out: Bulb[] = [];
+    for (let i = 0; i < count; i += 1) {
+      const t = i / (count - 1);
+      // Two-segment garland sag so the lights drape rather than sit in a line.
+      const sag = Math.sin(t * Math.PI * 2) * 3.2;
+      out.push({
+        left: 4 + t * 92,
+        top: 2.5 + Math.abs(Math.sin(t * Math.PI)) * 2 + sag,
+        size: 12 + rand(i + 5) * 8,
+        color: BULB_COLORS[i % BULB_COLORS.length],
+        duration: 3.4 + rand(i + 2) * 2.6,
+        delay: -rand(i + 9) * 3,
+      });
+    }
+    return out;
+  }, []);
+
+  return (
+    <>
+      {/* Deep night-blue ambient wash — layered radial + linear oklch gradients
+          for depth. Kept low-opacity so chat text stays legible (WCAG-AA). */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundImage: [
+            'radial-gradient(120% 80% at 50% -10%, oklch(0.25 0.07 250 / 0.16) 0%, transparent 55%)',
+            'radial-gradient(90% 60% at 85% 110%, oklch(0.3 0.06 255 / 0.1) 0%, transparent 60%)',
+            'linear-gradient(180deg, oklch(0.95 0.03 230 / 0.05) 0%, transparent 22%, transparent 80%, oklch(0.22 0.07 255 / 0.08) 100%)',
+          ].join(','),
+        }}
+      />
+
+      {/* Frosted vignette frame — cold edges, clear center. backdrop-filter on a
+          single cheap layer for a faint icy haze around the rim. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backdropFilter: 'blur(0.4px) saturate(1.04)',
+          WebkitBackdropFilter: 'blur(0.4px) saturate(1.04)',
+          backgroundImage:
+            'radial-gradient(135% 120% at 50% 42%, transparent 52%, oklch(0.9 0.04 225 / 0.07) 74%, oklch(0.28 0.07 250 / 0.16) 100%)',
+          animation: reduced ? 'none' : `${animFrostPulse} 12s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'opacity',
+        }}
+      />
+
+      {/* Aurora shimmer band high up — soft conic-ish wash of icy blue/green. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '-6%',
+          left: '-10%',
+          right: '-10%',
+          height: '40%',
+          contain: 'layout paint style',
+          mixBlendMode: 'screen',
+          filter: 'blur(26px)',
+          opacity: reduced ? 0.6 : undefined,
+          backgroundImage: [
+            'radial-gradient(60% 100% at 30% 0%, oklch(0.85 0.12 165 / 0.18) 0%, transparent 70%)',
+            'radial-gradient(55% 100% at 68% 0%, oklch(0.8 0.1 235 / 0.16) 0%, transparent 72%)',
+            'radial-gradient(50% 100% at 50% 0%, oklch(0.9 0.06 280 / 0.1) 0%, transparent 75%)',
+          ].join(','),
+          animation: reduced ? 'none' : `${animAurora} 18s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'transform, opacity',
+        }}
+      />
+
+      {/* String-light wire — a faint catenary line the bulbs hang from. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: 0,
+          left: 0,
+          right: 0,
+          height: '14%',
+          contain: 'layout paint style',
+          backgroundImage:
+            'radial-gradient(140% 60% at 50% -30%, oklch(0.3 0.04 250 / 0.14) 0%, transparent 70%)',
+        }}
+      />
+
+      {/* Bokeh string lights — soft blurred orbs that breathe. */}
+      {bulbs.map((b, i) => (
+        <div
+          key={`bulb-${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${b.left}%`,
+            top: `${b.top}%`,
+            width: `${b.size}px`,
+            height: `${b.size}px`,
+            marginLeft: `${-b.size / 2}px`,
+            borderRadius: '50%',
+            background: `radial-gradient(circle at 38% 34%, oklch(0.98 0.02 95 / 0.95) 0%, ${b.color} 38%, transparent 72%)`,
+            boxShadow: `0 0 ${b.size}px ${b.size * 0.45}px ${b.color.replace(')', ' / 0.45)')}`,
+            filter: 'blur(0.5px)',
+            opacity: reduced ? 0.9 : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animBulbBreathe} ${b.duration}s ease-in-out ${b.delay}s infinite`,
+            willChange: reduced ? undefined : 'transform, opacity',
+          }}
+        />
+      ))}
+
+      {/* Snowfall (motion only) — three parallax bands. Static dusting below. */}
+      {!reduced &&
+        flakes.map((f, i) => (
+          <div
+            key={`snow-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: 0,
+              left: `${f.left}%`,
+              width: `${f.size}px`,
+              height: `${f.size}px`,
+              animation: `${animSnowSway} ${f.swayDuration}s ease-in-out ${f.delay}s infinite`,
+              willChange: 'transform',
+            }}
+          >
+            <div
+              style={{
+                width: '100%',
+                height: '100%',
+                borderRadius: '50%',
+                background:
+                  'radial-gradient(circle at 35% 35%, oklch(0.99 0.01 230 / 0.95) 0%, oklch(0.95 0.03 230 / 0.7) 60%, transparent 100%)',
+                boxShadow: '0 0 4px oklch(0.9 0.05 235 / 0.55)',
+                opacity: f.opacity,
+                filter: f.blur ? `blur(${f.blur}px)` : undefined,
+                animation: `${animSnowFall} ${f.duration}s linear ${f.delay}s infinite`,
+                willChange: 'transform, opacity',
+              }}
+            />
+          </div>
+        ))}
+
+      {/* Static dusting of snow for the reduced-motion / preview scene — a
+          sparse scatter so the thumbnail still reads as snowfall. */}
+      {reduced &&
+        flakes.map((f, i) => {
+          const fy = rand(i + 0.5) * 96 + 2;
+          return (
+            <div
+              key={`snow-static-${i}`}
+              aria-hidden="true"
+              style={{
+                position: 'absolute',
+                left: `${f.left}%`,
+                top: `${fy}%`,
+                width: `${f.size}px`,
+                height: `${f.size}px`,
+                borderRadius: '50%',
+                background:
+                  'radial-gradient(circle at 35% 35%, oklch(0.99 0.01 230 / 0.95) 0%, oklch(0.95 0.03 230 / 0.7) 60%, transparent 100%)',
+                boxShadow: '0 0 4px oklch(0.9 0.05 235 / 0.5)',
+                opacity: f.opacity,
+                filter: f.blur ? `blur(${f.blur}px)` : undefined,
+              }}
+            />
+          );
+        })}
+    </>
+  );
+}

src/app/components/seasonal/themes/DeepSpace.css.ts

@@ -0,0 +1,73 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Deep Space overlay keyframes. Everything here animates ONLY transform/opacity
+ * so the compositor can run it cheaply. The `keyframes()` helper returns the
+ * generated class name string, which the component splices into inline
+ * `animation` shorthands.
+ */
+
+/** Cosmos breathe: the whole nebula backdrop drifts and dims almost imperceptibly. */
+export const animCosmosDrift = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(1)', opacity: '0.9' },
+  '50%': { transform: 'translate3d(-1.5%, 1%, 0) scale(1.04)', opacity: '1' },
+  '100%': { transform: 'translate3d(0, 0, 0) scale(1)', opacity: '0.9' },
+});
+
+/** Nebula cloud drift: a single blurred cloud floats slowly across its layer. */
+export const animNebulaA = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(1)' },
+  '50%': { transform: 'translate3d(4%, -3%, 0) scale(1.08)' },
+  '100%': { transform: 'translate3d(0, 0, 0) scale(1)' },
+});
+
+export const animNebulaB = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(1.05)' },
+  '50%': { transform: 'translate3d(-5%, 2.5%, 0) scale(1)' },
+  '100%': { transform: 'translate3d(0, 0, 0) scale(1.05)' },
+});
+
+/** Galaxy spiral: an exceptionally slow rotation of a distant pinwheel. */
+export const animGalaxySpin = keyframes({
+  '0%': { transform: 'rotate(0deg) scale(1)' },
+  '50%': { transform: 'rotate(180deg) scale(1.03)' },
+  '100%': { transform: 'rotate(360deg) scale(1)' },
+});
+
+/** Tiny star twinkle: gentle opacity + micro-scale pulse. */
+export const animTwinkle = keyframes({
+  '0%': { transform: 'scale(0.85)', opacity: '0.35' },
+  '50%': { transform: 'scale(1)', opacity: '1' },
+  '100%': { transform: 'scale(0.85)', opacity: '0.35' },
+});
+
+/** Bright star pulse: a slower, fuller bloom for the few hero stars. */
+export const animStarPulse = keyframes({
+  '0%': { transform: 'scale(0.8) rotate(0deg)', opacity: '0.55' },
+  '50%': { transform: 'scale(1.15) rotate(45deg)', opacity: '1' },
+  '100%': { transform: 'scale(0.8) rotate(0deg)', opacity: '0.55' },
+});
+
+/** Parallax depth: a star layer drifts as if the viewer is gliding through space. */
+export const animParallaxNear = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '100%': { transform: 'translate3d(-3%, 1.5%, 0)' },
+});
+
+export const animParallaxFar = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '100%': { transform: 'translate3d(-1.2%, 0.6%, 0)' },
+});
+
+/**
+ * Comet streak: a thin meteor crosses the field on a diagonal, fading in then
+ * out. The element is rotated by the component; this only translates along its
+ * own local X axis (its length direction) and fades.
+ */
+export const animComet = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)', opacity: '0' },
+  '6%': { opacity: '1' },
+  '40%': { opacity: '0.9' },
+  '60%': { transform: 'translate3d(150%, 0, 0)', opacity: '0' },
+  '100%': { transform: 'translate3d(150%, 0, 0)', opacity: '0' },
+});

src/app/components/seasonal/themes/DeepSpace.tsx

@@ -0,0 +1,364 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animCosmosDrift,
+  animNebulaA,
+  animNebulaB,
+  animGalaxySpin,
+  animTwinkle,
+  animStarPulse,
+  animParallaxNear,
+  animParallaxFar,
+  animComet,
+} from './DeepSpace.css';
+
+/**
+ * Deep Space overlay — a cosmic, awe-inspiring ambient mode. Layered oklch
+ * radial gradients build a deep violet void seeded with drifting magenta/cyan
+ * nebula clouds and a faint distant galaxy spiral. A parallax starfield sits at
+ * two depths (a dense field of tiny twinkling stars plus a handful of brighter
+ * hero stars), and slow comet streaks cross the sky occasionally.
+ *
+ * Palette (oklch): deep cosmic violet oklch(0.2 0.12 300), nebula magenta
+ * oklch(0.55 0.2 330), cyan oklch(0.75 0.13 200), starlight white
+ * oklch(0.98 0.02 280).
+ *
+ * RENDERING CONTRACT: the parent supplies a fixed inset:0 overflow:hidden
+ * pointer-events:none container at the right z-index. We only return
+ * absolutely-positioned aria-hidden children at low opacity — no z-index,
+ * position:fixed, or pointer-events here — kept well below opaque so chat text
+ * stays WCAG-AA legible.
+ *
+ * REDUCED MOTION: when `reduced`, render a static but gorgeous scene (a still
+ * nebula, a static starfield, a frozen galaxy and one frozen comet streak) with
+ * no `animation` at all. The settings preview always passes reduced=true.
+ */
+
+const STAR_TINTS = [
+  'oklch(0.98 0.02 280)', // starlight white
+  'oklch(0.9 0.07 230)', // cool cyan-white
+  'oklch(0.88 0.08 330)', // faint magenta-white
+] as const;
+
+const HERO_TINTS = [
+  'oklch(0.92 0.06 200)', // cyan starlight
+  'oklch(0.9 0.09 330)', // magenta starlight
+  'oklch(0.98 0.02 280)', // pure starlight
+] as const;
+
+type Star = {
+  top: number;
+  left: number;
+  size: number;
+  color: string;
+  duration: number;
+  delay: number;
+  staticOpacity: number;
+};
+
+type HeroStar = Star;
+
+type Comet = {
+  top: number;
+  left: number;
+  length: number;
+  angle: number;
+  color: string;
+  duration: number;
+  delay: number;
+};
+
+// Deterministic pseudo-random so the memoized scene is stable across renders.
+const rand = (seed: number) => {
+  const x = Math.sin(seed * 12.9898 + 78.233) * 43758.5453;
+  return x - Math.floor(x);
+};
+
+// A four-point gleam (sparkle) as an inline SVG data-URI — CSP-safe, no assets.
+const gleamUri = (color: string) =>
+  `url("data:image/svg+xml,${encodeURIComponent(
+    `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M12 0 C12.6 7.4 16.6 11.4 24 12 C16.6 12.6 12.6 16.6 12 24 C11.4 16.6 7.4 12.6 0 12 C7.4 11.4 11.4 7.4 12 0 Z' fill='${color}'/></svg>`,
+  )}")`;
+
+function makeStars(count: number, seedBase: number): Star[] {
+  return Array.from({ length: count }, (_, i) => {
+    const s = seedBase + i;
+    return {
+      top: rand(s + 1) * 100,
+      left: rand(s + 101) * 100,
+      size: 1 + Math.floor(rand(s + 201) * 2), // 1–2px tiny stars
+      color: STAR_TINTS[i % STAR_TINTS.length],
+      duration: 2.6 + rand(s + 301) * 3.4,
+      delay: rand(s + 401) * 5,
+      staticOpacity: 0.4 + rand(s + 501) * 0.55,
+    };
+  });
+}
+
+export function DeepSpaceOverlay({ reduced }: SeasonalOverlayProps) {
+  // Two parallax depths. Far = dense + faint, Near = sparser + slightly larger.
+  const farStars = useMemo<Star[]>(() => makeStars(16, 1000), []);
+  const nearStars = useMemo<Star[]>(() => makeStars(12, 2000), []);
+
+  const heroStars = useMemo<HeroStar[]>(
+    () =>
+      Array.from({ length: 6 }, (_, i) => {
+        const s = 3000 + i;
+        return {
+          top: 6 + rand(s + 1) * 78,
+          left: 6 + rand(s + 101) * 88,
+          size: 9 + Math.floor(rand(s + 201) * 9), // 9–17px gleams
+          color: HERO_TINTS[i % HERO_TINTS.length],
+          duration: 4 + rand(s + 301) * 4,
+          delay: rand(s + 401) * 5,
+          staticOpacity: 0.85,
+        };
+      }),
+    [],
+  );
+
+  const comets = useMemo<Comet[]>(
+    () =>
+      Array.from({ length: 3 }, (_, i) => {
+        const s = 4000 + i;
+        return {
+          top: 8 + rand(s + 1) * 44,
+          left: -10 + rand(s + 101) * 30,
+          length: 120 + Math.floor(rand(s + 201) * 120),
+          angle: 18 + rand(s + 301) * 16, // gentle downward diagonal
+          color: i % 2 === 0 ? 'oklch(0.92 0.06 200)' : 'oklch(0.9 0.09 330)',
+          duration: 7 + rand(s + 401) * 5,
+          delay: 2 + i * 6 + rand(s + 501) * 4,
+        };
+      }),
+    [],
+  );
+
+  return (
+    <>
+      {/* Deep cosmic void — layered oklch radial gradients for depth. A barely
+          perceptible drift gives the whole field life without distraction. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: '-6%',
+          contain: 'layout paint style',
+          backgroundColor: 'oklch(0.2 0.12 300 / 0.16)',
+          backgroundImage: [
+            'radial-gradient(120% 90% at 50% -8%, oklch(0.28 0.13 295 / 0.2) 0%, transparent 60%)',
+            'radial-gradient(100% 80% at 12% 18%, oklch(0.55 0.2 330 / 0.1) 0%, transparent 55%)',
+            'radial-gradient(100% 80% at 88% 28%, oklch(0.75 0.13 200 / 0.08) 0%, transparent 55%)',
+            'radial-gradient(150% 130% at 50% 118%, oklch(0.18 0.1 300 / 0.22) 0%, transparent 70%)',
+          ].join(','),
+          animation: reduced ? 'none' : `${animCosmosDrift} 26s ease-in-out infinite`,
+        }}
+      />
+
+      {/* Drifting nebula clouds — blurred radial gradients in magenta + cyan. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '-12%',
+          left: '-14%',
+          width: '70%',
+          height: '70%',
+          contain: 'layout paint style',
+          filter: 'blur(42px)',
+          background:
+            'radial-gradient(closest-side, oklch(0.55 0.2 330 / 0.16) 0%, oklch(0.45 0.18 320 / 0.06) 45%, transparent 72%)',
+          willChange: reduced ? undefined : 'transform',
+          animation: reduced ? 'none' : `${animNebulaA} 34s ease-in-out infinite`,
+        }}
+      />
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          bottom: '-16%',
+          right: '-12%',
+          width: '74%',
+          height: '74%',
+          contain: 'layout paint style',
+          filter: 'blur(46px)',
+          background:
+            'radial-gradient(closest-side, oklch(0.75 0.13 200 / 0.13) 0%, oklch(0.6 0.14 240 / 0.05) 48%, transparent 74%)',
+          willChange: reduced ? undefined : 'transform',
+          animation: reduced ? 'none' : `${animNebulaB} 40s ease-in-out infinite`,
+        }}
+      />
+      {/* A third, central violet wash to bind the two color clouds together. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '20%',
+          left: '28%',
+          width: '50%',
+          height: '50%',
+          contain: 'layout paint style',
+          filter: 'blur(50px)',
+          background:
+            'radial-gradient(closest-side, oklch(0.35 0.16 305 / 0.12) 0%, transparent 70%)',
+          willChange: reduced ? undefined : 'transform',
+          animation: reduced ? 'none' : `${animNebulaA} 46s ease-in-out infinite reverse`,
+        }}
+      />
+
+      {/* Faint distant galaxy spiral — an inline conic-ish swirl from layered
+          radial gradients, blurred and very slowly rotating. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '12%',
+          right: '14%',
+          width: '180px',
+          height: '180px',
+          contain: 'layout paint style',
+          borderRadius: '50%',
+          filter: 'blur(6px)',
+          opacity: reduced ? 0.5 : 0.6,
+          background: [
+            'radial-gradient(closest-side, oklch(0.95 0.04 280 / 0.35) 0%, oklch(0.7 0.16 320 / 0.12) 22%, transparent 40%)',
+            'conic-gradient(from 0deg, transparent 0deg, oklch(0.7 0.16 320 / 0.16) 60deg, transparent 130deg, oklch(0.75 0.13 200 / 0.12) 230deg, transparent 300deg)',
+          ].join(','),
+          maskImage: 'radial-gradient(closest-side, #000 0%, #000 55%, transparent 80%)',
+          WebkitMaskImage: 'radial-gradient(closest-side, #000 0%, #000 55%, transparent 80%)',
+          willChange: reduced ? undefined : 'transform',
+          transform: reduced ? 'rotate(28deg)' : undefined,
+          animation: reduced ? 'none' : `${animGalaxySpin} 120s linear infinite`,
+        }}
+      />
+
+      {/* Far parallax starfield — dense, faint, tiny twinkling stars. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          willChange: reduced ? undefined : 'transform',
+          animation: reduced ? 'none' : `${animParallaxFar} 60s ease-in-out infinite alternate`,
+        }}
+      >
+        {farStars.map((s, i) => (
+          <div
+            key={`f${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: `${s.top}%`,
+              left: `${s.left}%`,
+              width: `${s.size}px`,
+              height: `${s.size}px`,
+              borderRadius: '50%',
+              backgroundColor: s.color,
+              boxShadow: `0 0 ${s.size * 2}px ${s.color}`,
+              opacity: reduced ? s.staticOpacity : undefined,
+              transform: reduced ? 'scale(0.95)' : undefined,
+              animation: reduced
+                ? 'none'
+                : `${animTwinkle} ${s.duration}s ease-in-out ${s.delay}s infinite`,
+            }}
+          />
+        ))}
+      </div>
+
+      {/* Near parallax starfield — sparser, brighter, drifts a touch faster. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          willChange: reduced ? undefined : 'transform',
+          animation: reduced ? 'none' : `${animParallaxNear} 48s ease-in-out infinite alternate`,
+        }}
+      >
+        {nearStars.map((s, i) => (
+          <div
+            key={`n${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: `${s.top}%`,
+              left: `${s.left}%`,
+              width: `${s.size + 1}px`,
+              height: `${s.size + 1}px`,
+              borderRadius: '50%',
+              backgroundColor: s.color,
+              boxShadow: `0 0 ${(s.size + 1) * 2.5}px ${s.color}`,
+              opacity: reduced ? Math.min(1, s.staticOpacity + 0.15) : undefined,
+              transform: reduced ? 'scale(1)' : undefined,
+              animation: reduced
+                ? 'none'
+                : `${animTwinkle} ${s.duration * 0.85}s ease-in-out ${s.delay}s infinite`,
+            }}
+          />
+        ))}
+      </div>
+
+      {/* Hero stars — a few bright four-point gleams that pulse slowly. */}
+      {heroStars.map((s, i) => (
+        <div
+          key={`h${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            top: `${s.top}%`,
+            left: `${s.left}%`,
+            width: `${s.size}px`,
+            height: `${s.size}px`,
+            backgroundImage: gleamUri(s.color),
+            backgroundRepeat: 'no-repeat',
+            backgroundSize: 'contain',
+            filter: `drop-shadow(0 0 4px ${s.color})`,
+            opacity: reduced ? s.staticOpacity : undefined,
+            transform: reduced ? 'scale(1) rotate(20deg)' : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animStarPulse} ${s.duration}s ease-in-out ${s.delay}s infinite`,
+          }}
+        />
+      ))}
+
+      {/* Comet / warp streaks. In reduced mode, freeze a single streak mid-flight
+          so the static thumbnail reads as a living cosmos. */}
+      {(reduced ? comets.slice(0, 1) : comets).map((c, i) => (
+        <div
+          key={`c${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            top: `${c.top}%`,
+            left: `${c.left}%`,
+            width: `${c.length}px`,
+            height: '2px',
+            transformOrigin: '0 50%',
+            // Outer wrapper holds the rotation; inner element does the travel so
+            // the streak always moves along its own length axis.
+            transform: `rotate(${c.angle}deg)`,
+          }}
+        >
+          <div
+            style={{
+              position: 'absolute',
+              inset: 0,
+              borderRadius: '2px',
+              background: `linear-gradient(90deg, transparent 0%, ${c.color} 80%, oklch(0.98 0.02 280 / 0.95) 100%)`,
+              boxShadow: `0 0 6px ${c.color}`,
+              willChange: reduced ? undefined : 'transform, opacity',
+              opacity: reduced ? 0.85 : undefined,
+              transform: reduced ? 'translate3d(46%, 0, 0)' : undefined,
+              animation: reduced
+                ? 'none'
+                : `${animComet} ${c.duration}s ease-in ${c.delay}s infinite`,
+            }}
+          />
+        </div>
+      ))}
+    </>
+  );
+}

src/app/components/seasonal/themes/EarthDay.css.ts

@@ -0,0 +1,70 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Earth Day overlay keyframes. Every animation touches ONLY `transform` and
+ * `opacity` so the compositor can run them on the GPU — no layout/paint thrash.
+ * keyframes() returns the generated animation-name string, applied inline.
+ *
+ * Motif: verdant, hopeful nature. Leaves tumble, seeds/spores drift, pollen
+ * motes glow and pulse, soft sun rays breathe from above, the blue-marble
+ * Earth gently respires in a corner.
+ */
+
+/** Falling leaf: tumbles down with a wide pendular sway and slow spin. */
+export const animLeafTumble = keyframes({
+  '0%': { transform: 'translate3d(0, -10vh, 0) rotate(-18deg)', opacity: '0' },
+  '8%': { opacity: '0.7' },
+  '28%': { transform: 'translate3d(4vw, 22vh, 0) rotate(60deg)' },
+  '52%': { transform: 'translate3d(-3vw, 48vh, 0) rotate(165deg)' },
+  '76%': { transform: 'translate3d(5vw, 74vh, 0) rotate(280deg)' },
+  '90%': { opacity: '0.5' },
+  '100%': { transform: 'translate3d(1vw, 112vh, 0) rotate(360deg)', opacity: '0' },
+});
+
+/** Tiny seed / spore: drifts slowly downward, swaying like dandelion fluff. */
+export const animSeedDrift = keyframes({
+  '0%': { transform: 'translate3d(0, -6vh, 0) rotate(0deg)', opacity: '0' },
+  '12%': { opacity: '0.55' },
+  '40%': { transform: 'translate3d(3vw, 34vh, 0) rotate(140deg)' },
+  '70%': { transform: 'translate3d(-2.5vw, 64vh, 0) rotate(250deg)' },
+  '88%': { opacity: '0.4' },
+  '100%': { transform: 'translate3d(2vw, 110vh, 0) rotate(360deg)', opacity: '0' },
+});
+
+/** Pollen mote: floats gently upward in a soft serpentine path. */
+export const animPollenFloat = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(0.75)', opacity: '0' },
+  '14%': { opacity: '0.9' },
+  '38%': { transform: 'translate3d(10px, -22vh, 0) scale(1)' },
+  '64%': { transform: 'translate3d(-10px, -46vh, 0) scale(0.92)', opacity: '0.7' },
+  '90%': { opacity: '0.2' },
+  '100%': { transform: 'translate3d(6px, -72vh, 0) scale(0.7)', opacity: '0' },
+});
+
+/** Soft brightness twinkle layered on each pollen mote's glow. */
+export const animPollenGlow = keyframes({
+  '0%': { opacity: '0.55' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.55' },
+});
+
+/** Sun rays from above: slow breathing of opacity + a faint scale shimmer. */
+export const animRayBreathe = keyframes({
+  '0%': { transform: 'scaleY(1)', opacity: '0.4' },
+  '50%': { transform: 'scaleY(1.05)', opacity: '0.7' },
+  '100%': { transform: 'scaleY(1)', opacity: '0.4' },
+});
+
+/** Green aurora veil: a wide, slow horizontal sway with a gentle swell. */
+export const animAuroraSway = keyframes({
+  '0%': { transform: 'translate3d(-6%, 0, 0) scale(1.1)', opacity: '0.45' },
+  '50%': { transform: 'translate3d(6%, -2%, 0) scale(1.2)', opacity: '0.7' },
+  '100%': { transform: 'translate3d(-6%, 0, 0) scale(1.1)', opacity: '0.45' },
+});
+
+/** Blue-marble Earth: a barely-perceptible respiration of its halo. */
+export const animEarthRespire = keyframes({
+  '0%': { transform: 'scale(1)', opacity: '0.85' },
+  '50%': { transform: 'scale(1.04)', opacity: '1' },
+  '100%': { transform: 'scale(1)', opacity: '0.85' },
+});

src/app/components/seasonal/themes/EarthDay.tsx

@@ -0,0 +1,319 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animLeafTumble,
+  animSeedDrift,
+  animPollenFloat,
+  animPollenGlow,
+  animRayBreathe,
+  animAuroraSway,
+  animEarthRespire,
+} from './EarthDay.css';
+
+// ─── Palette (oklch) ──────────────────────────────────────────────────────────
+// Verdant, hopeful nature: living leaf greens, soft sky + deep ocean blues,
+// and a warm sun highlight. Kept low-alpha so chat text stays WCAG-AA legible.
+const LEAF_GREEN = 'oklch(0.65 0.15 145)';
+const LEAF_DEEP = 'oklch(0.52 0.14 150)';
+const LEAF_LIME = 'oklch(0.78 0.16 130)';
+const SKY_BLUE = 'oklch(0.70 0.10 230)';
+const OCEAN_BLUE = 'oklch(0.55 0.12 240)';
+const SUN_WARM = 'oklch(0.92 0.10 95)';
+const POLLEN_GOLD = 'oklch(0.88 0.13 95)';
+
+// Soft, translucent tints for the ambient gradient washes.
+const LEAF_GREEN_SOFT = 'oklch(0.65 0.15 145 / 0.10)';
+const LEAF_LIME_SOFT = 'oklch(0.78 0.16 130 / 0.08)';
+const SKY_BLUE_SOFT = 'oklch(0.70 0.10 230 / 0.07)';
+const SUN_SOFT = 'oklch(0.92 0.10 95 / 0.10)';
+const AURORA_TINT = 'oklch(0.74 0.16 155 / 0.22)';
+
+// ─── Inline SVG leaf, drawn once (CSP-safe data-URI, no external assets) ───────
+// A simple veined leaf silhouette. Color is baked per-variant so we can tint
+// individual falling leaves without a runtime filter.
+function leafUri(fill: string, vein: string): string {
+  const svg =
+    `<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28' viewBox='0 0 28 28'>` +
+    `<path fill='${fill}' d='M14 1C7 5 2 11 2 18c0 5 4 9 9 9 7 0 15-7 15-19 0-3-1-6-2-6-3 1-6 2-10 0C12 1 13 1 14 1z'/>` +
+    `<path fill='none' stroke='${vein}' stroke-width='0.9' stroke-linecap='round' ` +
+    `d='M11 26C13 18 17 9 23 3M11 26c-1-4-2-7-4-9M13 20c2-1 4-2 6-5M12 14c2-1 3-2 5-5'/>` +
+    `</svg>`;
+  return `url("data:image/svg+xml;utf8,${encodeURIComponent(svg)}")`;
+}
+
+// Three leaf tints, generated once at module load.
+const LEAF_URIS = [
+  leafUri('oklch(0.65 0.15 145 / 0.9)', 'oklch(0.40 0.10 150 / 0.7)'),
+  leafUri('oklch(0.78 0.16 130 / 0.9)', 'oklch(0.50 0.12 140 / 0.7)'),
+  leafUri('oklch(0.52 0.14 150 / 0.9)', 'oklch(0.34 0.08 155 / 0.7)'),
+];
+
+export function EarthDayOverlay({ reduced }: SeasonalOverlayProps) {
+  // ── Deterministic per-mount generation — never per-frame React state. ──
+
+  // Tumbling leaves (the heaviest motif → kept modest).
+  const leaves = useMemo(
+    () =>
+      Array.from({ length: 10 }, (_, i) => ({
+        left: (i * 6173 + 137) % 96,
+        size: 16 + (i % 4) * 6,
+        duration: 16 + (i % 5) * 2.5,
+        delay: (i * 1.7) % 16,
+        uri: LEAF_URIS[i % LEAF_URIS.length],
+        opacity: 0.45 + (i % 3) * 0.12,
+      })),
+    [],
+  );
+
+  // Tiny drifting seeds / spores — small, faint, slow.
+  const seeds = useMemo(
+    () =>
+      Array.from({ length: 8 }, (_, i) => ({
+        left: (i * 4099 + 53) % 98,
+        size: 2 + (i % 2),
+        duration: 18 + (i % 4) * 3,
+        delay: (i * 2.3) % 18,
+      })),
+    [],
+  );
+
+  // Glowing pollen motes rising from below, catching the light.
+  const pollen = useMemo(
+    () =>
+      Array.from({ length: 12 }, (_, i) => ({
+        left: (i * 5279 + 89) % 100,
+        bottom: (i * 2731 + 31) % 32,
+        size: 3 + (i % 3),
+        duration: 13 + (i % 6) * 2,
+        delay: (i * 0.9) % 13,
+        twinkle: 2.6 + (i % 5) * 0.5,
+      })),
+    [],
+  );
+
+  // Sun rays fanning down from the top — a few soft angled beams.
+  const rays = useMemo(
+    () =>
+      Array.from({ length: 5 }, (_, i) => ({
+        left: 12 + i * 18,
+        rotate: -14 + i * 7,
+        width: 60 + (i % 3) * 26,
+        duration: 8 + (i % 3) * 2,
+        delay: i * 1.3,
+        opacity: 0.32 + (i % 3) * 0.08,
+      })),
+    [],
+  );
+
+  return (
+    <>
+      {/* ── Base wash: layered green/sky gradients for verdant depth ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundImage: [
+            // warm sun glow spilling from top-center
+            `radial-gradient(60vmax 42vmax at 50% -8%, ${SUN_SOFT} 0%, transparent 60%)`,
+            // verdant canopy glow rising from the lower-left
+            `radial-gradient(52vmax 52vmax at 14% 100%, ${LEAF_GREEN_SOFT} 0%, transparent 62%)`,
+            // lime highlight upper-right for freshness
+            `radial-gradient(40vmax 40vmax at 86% 18%, ${LEAF_LIME_SOFT} 0%, transparent 58%)`,
+            // cool sky tint at the very top to pair with the Earth
+            `radial-gradient(70vmax 30vmax at 70% 4%, ${SKY_BLUE_SOFT} 0%, transparent 64%)`,
+          ].join(', '),
+          opacity: 0.9,
+        }}
+      />
+
+      {/* ── Green aurora veil drifting near the top ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          left: '-12%',
+          right: '-12%',
+          top: '-8%',
+          height: '46vh',
+          contain: 'layout paint style',
+          backgroundImage: `radial-gradient(60% 100% at 50% 0%, ${AURORA_TINT} 0%, transparent 72%)`,
+          filter: 'blur(26px)',
+          willChange: reduced ? undefined : 'transform, opacity',
+          transformOrigin: '50% 0%',
+          opacity: reduced ? 0.55 : undefined,
+          transform: reduced ? 'translate3d(0, 0, 0) scale(1.15)' : undefined,
+          animation: reduced ? 'none' : `${animAuroraSway} 24s ease-in-out infinite`,
+        }}
+      />
+
+      {/* ── Soft sun rays fanning down from above ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          overflow: 'hidden',
+        }}
+      >
+        {rays.map((r, i) => (
+          <div
+            key={i}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: '-10%',
+              left: `${r.left}%`,
+              width: `${r.width}px`,
+              height: '95vh',
+              transformOrigin: '50% 0%',
+              transform: `rotate(${r.rotate}deg)`,
+              backgroundImage: `linear-gradient(180deg, ${SUN_WARM} 0%, transparent 70%)`,
+              filter: 'blur(8px)',
+              mixBlendMode: 'screen',
+              opacity: r.opacity,
+              willChange: reduced ? undefined : 'transform, opacity',
+              animation: reduced
+                ? 'none'
+                : `${animRayBreathe} ${r.duration}s ease-in-out ${r.delay}s infinite`,
+            }}
+          />
+        ))}
+      </div>
+
+      {/* ── Blue-marble Earth tucked into the bottom-right corner ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          right: '-6%',
+          bottom: '-10%',
+          width: '300px',
+          height: '300px',
+          contain: 'layout paint style',
+          willChange: reduced ? undefined : 'transform, opacity',
+          transform: reduced ? 'scale(1.02)' : undefined,
+          opacity: reduced ? 0.9 : undefined,
+          animation: reduced ? 'none' : `${animEarthRespire} 18s ease-in-out infinite`,
+        }}
+      >
+        {/* atmospheric rim halo */}
+        <div
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            inset: '-14%',
+            borderRadius: '50%',
+            backgroundImage: `radial-gradient(circle at 50% 50%, transparent 58%, ${SKY_BLUE} 68%, transparent 80%)`,
+            filter: 'blur(10px)',
+            opacity: 0.5,
+          }}
+        />
+        {/* the globe itself — oceans, land, soft terminator shadow */}
+        <div
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            inset: 0,
+            borderRadius: '50%',
+            backgroundImage: [
+              // continents (green landmasses)
+              `radial-gradient(26% 30% at 38% 40%, ${LEAF_GREEN} 0%, transparent 60%)`,
+              `radial-gradient(22% 26% at 64% 58%, ${LEAF_DEEP} 0%, transparent 62%)`,
+              `radial-gradient(16% 18% at 50% 74%, ${LEAF_LIME} 0%, transparent 65%)`,
+              // ocean base
+              `radial-gradient(circle at 42% 38%, ${SKY_BLUE} 0%, ${OCEAN_BLUE} 55%, oklch(0.40 0.10 250) 100%)`,
+            ].join(', '),
+            // soft day/night terminator from the lower-right
+            boxShadow: 'inset -22px -26px 50px oklch(0.18 0.05 250 / 0.7)',
+            opacity: 0.42,
+          }}
+        />
+      </div>
+
+      {/* ── Rising, glowing pollen motes ── */}
+      {pollen.map((p, i) => (
+        <div
+          key={`p${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${p.left}%`,
+            bottom: `${p.bottom}%`,
+            willChange: reduced ? undefined : 'transform, opacity',
+            transform: reduced ? 'scale(0.95)' : undefined,
+            opacity: reduced ? 0.6 : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animPollenFloat} ${p.duration}s ease-in ${p.delay}s infinite`,
+          }}
+        >
+          <div
+            aria-hidden="true"
+            style={{
+              width: `${p.size}px`,
+              height: `${p.size}px`,
+              borderRadius: '50%',
+              backgroundColor: POLLEN_GOLD,
+              boxShadow: `0 0 ${p.size * 2.6}px ${POLLEN_GOLD}`,
+              animation: reduced ? 'none' : `${animPollenGlow} ${p.twinkle}s ease-in-out infinite`,
+            }}
+          />
+        </div>
+      ))}
+
+      {/* ── Drifting seeds / spores (skip entirely when reduced) ── */}
+      {!reduced &&
+        seeds.map((s, i) => (
+          <div
+            key={`s${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: '-6%',
+              left: `${s.left}%`,
+              width: `${s.size}px`,
+              height: `${s.size}px`,
+              borderRadius: '50%',
+              backgroundColor: 'oklch(0.96 0.02 120 / 0.85)',
+              boxShadow: '0 0 6px oklch(0.92 0.04 120 / 0.6)',
+              willChange: 'transform, opacity',
+              animation: `${animSeedDrift} ${s.duration}s linear ${s.delay}s infinite`,
+            }}
+          />
+        ))}
+
+      {/* ── Tumbling leaves ── */}
+      {leaves.map((l, i) => (
+        <div
+          key={`l${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            top: '-10%',
+            left: `${l.left}%`,
+            width: `${l.size}px`,
+            height: `${l.size}px`,
+            backgroundImage: l.uri,
+            backgroundRepeat: 'no-repeat',
+            backgroundSize: 'contain',
+            willChange: reduced ? undefined : 'transform, opacity',
+            opacity: l.opacity,
+            // Static leaves are scattered down the column so the still scene
+            // reads as a gentle leaf-fall frozen mid-air.
+            transform: reduced
+              ? `translate3d(${(i % 2 ? 1 : -1) * 3}vw, ${6 + i * 9}vh, 0) rotate(${
+                  (i * 47) % 360
+                }deg)`
+              : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animLeafTumble} ${l.duration}s ease-in ${l.delay}s infinite`,
+          }}
+        />
+      ))}
+    </>
+  );
+}

src/app/components/seasonal/themes/Halloween.css.ts

@@ -0,0 +1,56 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Halloween overlay keyframes. Every animation touches ONLY `transform` and
+ * `opacity` so the compositor can run them on the GPU without layout/paint.
+ * keyframes() returns the generated animation-name string, applied inline.
+ */
+
+/** Slow breathing of the sickly moon-glow vignette. */
+export const animMoonPulse = keyframes({
+  '0%': { transform: 'scale(1)', opacity: '0.55' },
+  '50%': { transform: 'scale(1.06)', opacity: '0.8' },
+  '100%': { transform: 'scale(1)', opacity: '0.55' },
+});
+
+/** Low fog band: drifts sideways while gently rising and swelling. */
+export const animFogDrift = keyframes({
+  '0%': { transform: 'translate3d(-12%, 6%, 0) scale(1.1)', opacity: '0' },
+  '15%': { opacity: '0.5' },
+  '50%': { transform: 'translate3d(6%, -2%, 0) scale(1.25)', opacity: '0.65' },
+  '85%': { opacity: '0.45' },
+  '100%': { transform: 'translate3d(18%, 4%, 0) scale(1.1)', opacity: '0' },
+});
+
+/** A bat flaps slowly across the sky in a shallow arc. */
+export const animBatGlide = keyframes({
+  '0%': { transform: 'translate3d(-12vw, 8vh, 0) scale(0.9)', opacity: '0' },
+  '10%': { opacity: '0.7' },
+  '45%': { transform: 'translate3d(45vw, -4vh, 0) scale(1)' },
+  '80%': { transform: 'translate3d(85vw, 6vh, 0) scale(0.95)', opacity: '0.6' },
+  '100%': { transform: 'translate3d(112vw, 2vh, 0) scale(0.9)', opacity: '0' },
+});
+
+/** The bat's wings beat — fast vertical squash of the wing element. */
+export const animWingFlap = keyframes({
+  '0%': { transform: 'scaleY(1) scaleX(1)' },
+  '50%': { transform: 'scaleY(0.35) scaleX(1.08)' },
+  '100%': { transform: 'scaleY(1) scaleX(1)' },
+});
+
+/** Will-o'-wisp ember: floats upward, swaying, pulsing in brightness. */
+export const animEmberFloat = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(0.7)', opacity: '0' },
+  '12%': { opacity: '0.85' },
+  '35%': { transform: 'translate3d(14px, -28vh, 0) scale(1)' },
+  '65%': { transform: 'translate3d(-12px, -55vh, 0) scale(0.9)', opacity: '0.7' },
+  '90%': { opacity: '0.25' },
+  '100%': { transform: 'translate3d(8px, -82vh, 0) scale(0.6)', opacity: '0' },
+});
+
+/** Soft twinkle for embers — independent opacity flicker layered on top. */
+export const animEmberTwinkle = keyframes({
+  '0%': { opacity: '0.6' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.6' },
+});

src/app/components/seasonal/themes/Halloween.tsx

@@ -0,0 +1,267 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animMoonPulse,
+  animFogDrift,
+  animBatGlide,
+  animWingFlap,
+  animEmberFloat,
+  animEmberTwinkle,
+} from './Halloween.css';
+
+// ─── Palette (oklch) ──────────────────────────────────────────────────────────
+// Deep haunted indigo, sickly toxic-green moon glow, warm ember orange.
+const PURPLE_DEEP = 'oklch(0.20 0.12 300)';
+const PURPLE_FAINT = 'oklch(0.28 0.10 300 / 0.45)';
+const TOXIC_GREEN = 'oklch(0.80 0.18 150)';
+const TOXIC_GREEN_SOFT = 'oklch(0.72 0.16 150 / 0.35)';
+const EMBER_ORANGE = 'oklch(0.70 0.18 50)';
+const FOG_TINT = 'oklch(0.45 0.06 280 / 0.32)';
+
+// A corner cobweb, drawn once as an inline SVG data-URI (CSP-safe, no assets).
+// strokeWidth kept hairline so it reads as gossamer thread, not a cage.
+const cobwebUri = (() => {
+  const svg =
+    `<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'>` +
+    `<g fill='none' stroke='rgba(196,176,224,0.32)' stroke-width='0.8'>` +
+    // radial threads
+    `<line x1='0' y1='0' x2='180' y2='180'/>` +
+    `<line x1='0' y1='0' x2='180' y2='90'/>` +
+    `<line x1='0' y1='0' x2='90' y2='180'/>` +
+    `<line x1='0' y1='0' x2='180' y2='40'/>` +
+    `<line x1='0' y1='0' x2='40' y2='180'/>` +
+    // concentric catch-threads (gentle sag via quadratic curves)
+    `<path d='M40 0 Q22 22 0 40'/>` +
+    `<path d='M85 0 Q48 48 0 85'/>` +
+    `<path d='M130 0 Q74 74 0 130'/>` +
+    `<path d='M180 0 Q104 104 0 180'/>` +
+    `<path d='M180 60 Q120 120 60 180'/>` +
+    `</g></svg>`;
+  return `url("data:image/svg+xml;utf8,${encodeURIComponent(svg)}")`;
+})();
+
+// A single silhouetted bat, inline SVG. Wings are separate so the wrapper can
+// glide while an inner element flaps independently — we re-use one body shape.
+function BatSilhouette() {
+  return (
+    <svg
+      width="46"
+      height="22"
+      viewBox="0 0 46 22"
+      aria-hidden="true"
+      style={{ display: 'block', overflow: 'visible' }}
+    >
+      <path
+        fill="oklch(0.12 0.04 300 / 0.85)"
+        d="M23 6c1.6 0 2.7 1.3 3 3 .9-1.4 2.4-2.6 4.2-2.6-.5 1-.4 2.1.2 2.9 2-2.4 5.4-4 8.6-3.7-1.5 1-2.3 2.6-2.4 4.3 1.3-.8 3-1 4.4-.4-2.2.8-3.9 2.5-5.2 4.5-2 3-4.8 5-8.3 4.4-1.9-.3-3.4-1.6-4.5-3.2-1.1 1.6-2.6 2.9-4.5 3.2-3.5.6-6.3-1.4-8.3-4.4-1.3-2-3-3.7-5.2-4.5 1.4-.6 3.1-.4 4.4.4-.1-1.7-.9-3.3-2.4-4.3 3.2-.3 6.6 1.3 8.6 3.7.6-.8.7-1.9.2-2.9 1.8 0 3.3 1.2 4.2 2.6.3-1.7 1.4-3 3-3z"
+      />
+    </svg>
+  );
+}
+
+export function HalloweenOverlay({ reduced }: SeasonalOverlayProps) {
+  // Deterministic per-mount generation — never per-frame React state.
+  const embers = useMemo(
+    () =>
+      Array.from({ length: 12 }, (_, i) => {
+        const green = i % 3 === 0; // ~1/3 toxic-green wisps, rest warm embers
+        return {
+          left: (i * 6151 + 113) % 100,
+          bottom: (i * 3137 + 47) % 28, // start near floor
+          size: 3 + (i % 4),
+          duration: 11 + (i % 6) * 2.2,
+          delay: (i * 0.83) % 11,
+          twinkle: 2.4 + (i % 5) * 0.6,
+          color: green ? TOXIC_GREEN : EMBER_ORANGE,
+        };
+      }),
+    [],
+  );
+
+  const bats = useMemo(
+    () =>
+      Array.from({ length: 3 }, (_, i) => ({
+        top: 8 + i * 13,
+        duration: 22 + i * 7,
+        delay: i * 6.5,
+        flap: 0.5 + i * 0.12,
+        scale: 0.7 + i * 0.18,
+      })),
+    [],
+  );
+
+  const fogBands = useMemo(
+    () =>
+      Array.from({ length: 3 }, (_, i) => ({
+        bottom: -6 + i * 9,
+        duration: 26 + i * 8,
+        delay: i * 5,
+        height: 130 + i * 30,
+      })),
+    [],
+  );
+
+  return (
+    <>
+      {/* ── Sky: layered indigo→black gradient with toxic-green moon vignette ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundColor: 'transparent',
+          backgroundImage: [
+            // sickly moon glow, upper-right
+            `radial-gradient(38vmax 38vmax at 78% 14%, ${TOXIC_GREEN_SOFT} 0%, transparent 58%)`,
+            // cold counter-glow lower-left for depth
+            `radial-gradient(46vmax 46vmax at 12% 92%, ${PURPLE_FAINT} 0%, transparent 60%)`,
+            // overall indigo→black wash, darker toward edges (vignette)
+            `radial-gradient(120% 120% at 50% 30%, transparent 32%, ${PURPLE_DEEP} 100%)`,
+            `linear-gradient(180deg, ${PURPLE_DEEP} 0%, transparent 45%)`,
+          ].join(', '),
+          opacity: 0.5,
+        }}
+      />
+
+      {/* ── Moon disc + breathing halo (the only backdrop-filter, kept cheap) ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '8%',
+          right: '12%',
+          width: '160px',
+          height: '160px',
+          borderRadius: '50%',
+          willChange: 'transform, opacity',
+          backgroundImage: `radial-gradient(circle at 42% 40%, ${TOXIC_GREEN} 0%, oklch(0.55 0.14 150 / 0.5) 38%, transparent 72%)`,
+          filter: 'blur(2px)',
+          backdropFilter: 'saturate(1.15)',
+          animation: reduced ? 'none' : `${animMoonPulse} 9s ease-in-out infinite`,
+        }}
+      />
+
+      {/* ── Low drifting fog bands ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          overflow: 'hidden',
+        }}
+      >
+        {fogBands.map((f, i) => (
+          <div
+            key={i}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: '-15%',
+              right: '-15%',
+              bottom: `${f.bottom}%`,
+              height: `${f.height}px`,
+              backgroundImage: `radial-gradient(60% 100% at 50% 100%, ${FOG_TINT} 0%, transparent 75%)`,
+              filter: 'blur(14px)',
+              willChange: 'transform, opacity',
+              opacity: reduced ? 0.5 : undefined,
+              transform: reduced ? 'translate3d(2%, 0, 0) scale(1.18)' : undefined,
+              animation: reduced
+                ? 'none'
+                : `${animFogDrift} ${f.duration}s ease-in-out ${f.delay}s infinite`,
+            }}
+          />
+        ))}
+      </div>
+
+      {/* ── Will-o'-wisps / floating embers ── */}
+      {embers.map((e, i) => (
+        <div
+          key={i}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${e.left}%`,
+            bottom: `${e.bottom}%`,
+            willChange: reduced ? undefined : 'transform, opacity',
+            transform: reduced ? 'scale(0.9)' : undefined,
+            opacity: reduced ? 0.4 : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animEmberFloat} ${e.duration}s ease-in ${e.delay}s infinite`,
+          }}
+        >
+          <div
+            aria-hidden="true"
+            style={{
+              width: `${e.size}px`,
+              height: `${e.size}px`,
+              borderRadius: '50%',
+              backgroundColor: e.color,
+              boxShadow: `0 0 ${e.size * 2.5}px ${e.color}`,
+              animation: reduced
+                ? 'none'
+                : `${animEmberTwinkle} ${e.twinkle}s ease-in-out infinite`,
+            }}
+          />
+        </div>
+      ))}
+
+      {/* ── Silhouetted bats gliding across (skip entirely when reduced) ── */}
+      {!reduced &&
+        bats.map((b, i) => (
+          <div
+            key={i}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: `${b.top}%`,
+              left: 0,
+              willChange: 'transform, opacity',
+              animation: `${animBatGlide} ${b.duration}s linear ${b.delay}s infinite`,
+            }}
+          >
+            <div
+              aria-hidden="true"
+              style={{
+                transform: `scale(${b.scale})`,
+                animation: `${animWingFlap} ${b.flap}s ease-in-out infinite`,
+              }}
+            >
+              <BatSilhouette />
+            </div>
+          </div>
+        ))}
+
+      {/* ── Cobwebs tucked into two corners (top-left, top-right mirrored) ── */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: 0,
+          left: 0,
+          width: '180px',
+          height: '180px',
+          backgroundImage: cobwebUri,
+          backgroundRepeat: 'no-repeat',
+          opacity: 0.7,
+        }}
+      />
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: 0,
+          right: 0,
+          width: '180px',
+          height: '180px',
+          backgroundImage: cobwebUri,
+          backgroundRepeat: 'no-repeat',
+          transform: 'scaleX(-1)',
+          opacity: 0.7,
+        }}
+      />
+    </>
+  );
+}

src/app/components/seasonal/themes/LunarNewYear.css.ts

@@ -0,0 +1,109 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Lunar New Year overlay keyframes — red paper lanterns, drifting gold plum
+ * blossoms, and a coiling dragon. Every animation touches ONLY `transform` and
+ * `opacity`, so the compositor runs them on the GPU with zero layout/paint.
+ * keyframes() returns the generated animation-name string, applied inline by the
+ * component. Static structure (gradients, SVG data-URIs, geometry) lives in the
+ * component; this module is motion only.
+ */
+
+/**
+ * Lantern bob — a hung lantern rises a touch and sinks again on a long, lazy
+ * cycle, as if buoyed by warm air. translateY + a whisper of scale only; the
+ * per-lantern duration/delay desynchronise the swarm.
+ */
+export const animLanternBob = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(1)' },
+  '50%': { transform: 'translate3d(0, -2.2vh, 0) scale(1.015)' },
+  '100%': { transform: 'translate3d(0, 0, 0) scale(1)' },
+});
+
+/**
+ * Lantern pendulum — a gentle rotational sway about the top mount, so each
+ * lantern rocks like it hangs from a string. Pairs with the bob on a different
+ * period to read as organic drift rather than a metronome.
+ */
+export const animLanternSway = keyframes({
+  '0%': { transform: 'rotate(-2.4deg)' },
+  '50%': { transform: 'rotate(2.4deg)' },
+  '100%': { transform: 'rotate(-2.4deg)' },
+});
+
+/**
+ * Tassel sway — the silk tassel under a lantern trails its parent's motion with
+ * a wider, slightly lagging swing. transformOrigin is the top of the tassel.
+ */
+export const animTasselSway = keyframes({
+  '0%': { transform: 'rotate(5deg)' },
+  '50%': { transform: 'rotate(-5deg)' },
+  '100%': { transform: 'rotate(5deg)' },
+});
+
+/**
+ * Lantern inner glow — the warm light inside each lantern swells and dims, like
+ * a candle breathing. Opacity + scale only.
+ */
+export const animGlowBreathe = keyframes({
+  '0%': { transform: 'scale(0.94)', opacity: '0.55' },
+  '50%': { transform: 'scale(1.06)', opacity: '0.9' },
+  '100%': { transform: 'scale(0.94)', opacity: '0.55' },
+});
+
+/**
+ * Petal drift — a gold plum-blossom petal falls the full height while spinning
+ * and swaying. A tall translateY lets one keyframe set serve every petal;
+ * per-petal duration/delay/scale create the parallax variety.
+ */
+export const animPetalFall = keyframes({
+  '0%': { transform: 'translate3d(0, -10vh, 0) rotateZ(0deg) rotateY(0deg)', opacity: '0' },
+  '10%': { opacity: '0.9' },
+  '50%': { transform: 'translate3d(3vw, 52vh, 0) rotateZ(190deg) rotateY(180deg)' },
+  '90%': { opacity: '0.8' },
+  '100%': {
+    transform: 'translate3d(-2.4vw, 114vh, 0) rotateZ(380deg) rotateY(360deg)',
+    opacity: '0',
+  },
+});
+
+/**
+ * Lateral petal sway on the wrapper, decoupled from the fall so the two combine
+ * into an organic wind-borne path rather than a straight drop.
+ */
+export const animPetalSway = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '50%': { transform: 'translate3d(2.8vw, 0, 0)' },
+  '100%': { transform: 'translate3d(0, 0, 0)' },
+});
+
+/**
+ * Dragon drift — the gold dragon silhouette breathes and undulates almost
+ * imperceptibly across the scene. translate + scale + opacity only, very slow.
+ */
+export const animDragonDrift = keyframes({
+  '0%': { transform: 'translate3d(-2%, 0, 0) scale(1)', opacity: '0.42' },
+  '50%': { transform: 'translate3d(2%, -1%, 0) scale(1.04)', opacity: '0.6' },
+  '100%': { transform: 'translate3d(-2%, 0, 0) scale(1)', opacity: '0.42' },
+});
+
+/**
+ * Lacquer-tint breathing — a barely-there pulse of the warm red ambient wash so
+ * the static base feels alive without distracting motion.
+ */
+export const animLacquerPulse = keyframes({
+  '0%': { opacity: '0.82' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.82' },
+});
+
+/**
+ * Gold ember rise — tiny sparks of lantern light float gently upward and fade,
+ * like motes drifting off the flames. translateY + opacity only.
+ */
+export const animEmberRise = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(0.6)', opacity: '0' },
+  '15%': { opacity: '0.85' },
+  '80%': { opacity: '0.5' },
+  '100%': { transform: 'translate3d(0.6vw, -26vh, 0) scale(1)', opacity: '0' },
+});

src/app/components/seasonal/themes/LunarNewYear.tsx

@@ -0,0 +1,483 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animLanternBob,
+  animLanternSway,
+  animTasselSway,
+  animGlowBreathe,
+  animPetalFall,
+  animPetalSway,
+  animDragonDrift,
+  animLacquerPulse,
+  animEmberRise,
+} from './LunarNewYear.css';
+
+// Deterministic pseudo-random so the scene is identical every mount (no React
+// state per frame). Large primes keep the distribution well spread.
+const rand = (seed: number): number => {
+  const x = Math.sin(seed * 127.1 + 311.7) * 43758.5453;
+  return x - Math.floor(x);
+};
+
+// Core oklch palette — auspicious crimson/vermilion lanterns, imperial gold
+// trim and blossoms, over a deep lacquer-red ambient tint. Kept luminous and
+// gentle so everything reads as soft ambient glow, never solid paint.
+const CRIMSON = 'oklch(0.50 0.20 25)';
+const VERMILION = 'oklch(0.58 0.21 30)';
+const GOLD = 'oklch(0.82 0.14 85)';
+const GOLD_HI = 'oklch(0.92 0.10 92)';
+
+// A coiling dragon silhouette in imperial gold, rendered once as an inline SVG
+// data-URI so it costs a single GPU-composited layer (no DOM weight). The curve
+// is intentionally abstract and very subtle — a calligraphic ribbon-body with a
+// suggestion of a head, mane and tail arcing across the upper scene.
+const dragonUri = ((): string => {
+  const svg =
+    `<svg xmlns='http://www.w3.org/2000/svg' width='760' height='320' viewBox='0 0 760 320'>` +
+    `<defs>` +
+    `<linearGradient id='g' x1='0' y1='0' x2='1' y2='0'>` +
+    `<stop offset='0' stop-color='oklch(0.86 0.13 88)' stop-opacity='0.85'/>` +
+    `<stop offset='0.55' stop-color='oklch(0.82 0.14 85)' stop-opacity='0.7'/>` +
+    `<stop offset='1' stop-color='oklch(0.78 0.13 80)' stop-opacity='0.45'/>` +
+    `</linearGradient>` +
+    `</defs>` +
+    `<g fill='none' stroke='url(%23g)' stroke-linecap='round' stroke-linejoin='round'>` +
+    // Sinuous body — a thick tapering serpentine ribbon.
+    `<path d='M30 180 C120 90 200 250 300 170 S470 60 560 150 S700 240 740 150' ` +
+    `stroke-width='26' opacity='0.5'/>` +
+    // Inner highlight running along the body for a calligraphic sheen.
+    `<path d='M30 180 C120 90 200 250 300 170 S470 60 560 150 S700 240 740 150' ` +
+    `stroke-width='7' opacity='0.7'/>` +
+    // Head + horn flourish at the leading end.
+    `<path d='M30 180 C10 160 8 130 26 120 M26 120 C36 112 50 116 52 130' ` +
+    `stroke-width='9' opacity='0.6'/>` +
+    // Mane / whisker strokes flaring back from the head.
+    `<path d='M44 134 C70 120 96 132 110 152 M40 150 C66 148 92 160 104 180' ` +
+    `stroke-width='5' opacity='0.45'/>` +
+    // Tail wisps.
+    `<path d='M740 150 C754 138 758 160 748 172 M726 158 C742 168 744 186 732 196' ` +
+    `stroke-width='5' opacity='0.45'/>` +
+    `</g></svg>`;
+  return `url("data:image/svg+xml;utf8,${encodeURIComponent(svg)}")`;
+})();
+
+type Lantern = {
+  left: number;
+  top: number;
+  scale: number;
+  bobDuration: number;
+  swayDuration: number;
+  delay: number;
+  opacity: number;
+};
+
+type Petal = {
+  left: number;
+  size: number;
+  duration: number;
+  delay: number;
+  swayDuration: number;
+  opacity: number;
+  blur: number;
+  hue: number;
+};
+
+type Ember = {
+  left: number;
+  bottom: number;
+  size: number;
+  duration: number;
+  delay: number;
+};
+
+// A single five-petal plum blossom (gold), inline SVG so each petal sliver is
+// one cheap element. Returned as a data-URI background painted on a square.
+const blossomUri = ((): string => {
+  const petals = Array.from({ length: 5 }, (_, i) => {
+    const a = (i * 72 * Math.PI) / 180;
+    const cx = 16 + Math.cos(a - Math.PI / 2) * 8;
+    const cy = 16 + Math.sin(a - Math.PI / 2) * 8;
+    return `<circle cx='${cx.toFixed(1)}' cy='${cy.toFixed(1)}' r='5.4' />`;
+  }).join('');
+  const svg =
+    `<svg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'>` +
+    `<g fill='oklch(0.86 0.13 88)' opacity='0.92'>${petals}</g>` +
+    `<circle cx='16' cy='16' r='3.2' fill='oklch(0.94 0.10 95)'/>` +
+    `</svg>`;
+  return `url("data:image/svg+xml;utf8,${encodeURIComponent(svg)}")`;
+})();
+
+export function LunarNewYearOverlay({ reduced }: SeasonalOverlayProps) {
+  // Paper lanterns strung across the upper third, gently staggered in depth.
+  const lanterns = useMemo<Lantern[]>(() => {
+    const slots = [
+      { left: 9, top: 7, scale: 1.0 },
+      { left: 27, top: 13, scale: 0.82 },
+      { left: 46, top: 6, scale: 1.12 },
+      { left: 64, top: 15, scale: 0.78 },
+      { left: 82, top: 9, scale: 0.95 },
+      { left: 92, top: 20, scale: 0.7 },
+    ];
+    return slots.map((s, i) => ({
+      left: s.left,
+      top: s.top,
+      scale: s.scale,
+      bobDuration: 7 + rand(i + 1) * 4,
+      swayDuration: 5.5 + rand(i + 4) * 3,
+      delay: -rand(i + 7) * 6,
+      opacity: 0.78 + rand(i + 2) * 0.18,
+    }));
+  }, []);
+
+  // Drifting gold plum-blossom petals — two parallax bands (far small/dim/slow,
+  // near large/bright/fast) for depth.
+  const petals = useMemo<Petal[]>(() => {
+    const bands = [
+      { count: 9, size: [9, 14], dur: [15, 21], op: [0.4, 0.6], blur: 0.6 },
+      { count: 8, size: [15, 24], dur: [10, 14], op: [0.6, 0.85], blur: 0 },
+    ];
+    const out: Petal[] = [];
+    let s = 1;
+    bands.forEach((b) => {
+      for (let i = 0; i < b.count; i += 1) {
+        const r1 = rand(s);
+        const r2 = rand(s + 0.37);
+        const r3 = rand(s + 0.71);
+        const r4 = rand(s + 0.91);
+        out.push({
+          left: r1 * 100,
+          size: b.size[0] + r2 * (b.size[1] - b.size[0]),
+          duration: b.dur[0] + r3 * (b.dur[1] - b.dur[0]),
+          delay: -r4 * (b.dur[1] + 4),
+          swayDuration: 5 + r2 * 5,
+          opacity: b.op[0] + r3 * (b.op[1] - b.op[0]),
+          blur: b.blur,
+          hue: 82 + r4 * 10,
+        });
+        s += 1;
+      }
+    });
+    return out;
+  }, []);
+
+  // A few gold embers rising from the lanterns (motion scene only).
+  const embers = useMemo<Ember[]>(
+    () =>
+      Array.from({ length: 7 }, (_, i) => ({
+        left: 8 + rand(i + 11) * 84,
+        bottom: 8 + rand(i + 21) * 30,
+        size: 1.6 + rand(i + 31) * 2.2,
+        duration: 9 + rand(i + 41) * 6,
+        delay: -rand(i + 51) * 12,
+      })),
+    [],
+  );
+
+  return (
+    <>
+      {/* Deep lacquer-red ambient wash — layered radial + linear oklch gradients
+          for depth and a warm crimson lantern-glow from above. Low-opacity so
+          chat text stays legible (WCAG-AA). */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundImage: [
+            `radial-gradient(120% 80% at 50% -8%, ${CRIMSON.replace(')', ' / 0.16)')} 0%, transparent 56%)`,
+            `radial-gradient(90% 70% at 50% 112%, oklch(0.42 0.17 28 / 0.1) 0%, transparent 60%)`,
+            `linear-gradient(180deg, oklch(0.55 0.20 28 / 0.07) 0%, transparent 26%, transparent 82%, oklch(0.40 0.16 28 / 0.08) 100%)`,
+          ].join(','),
+          animation: reduced ? 'none' : `${animLacquerPulse} 13s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'opacity',
+        }}
+      />
+
+      {/* Imperial-gold dragon silhouette arcing across the upper scene — a
+          single composited SVG layer, blurred and screen-blended so it reads as
+          an ethereal gilt apparition, never a hard graphic. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '8%',
+          left: '-6%',
+          right: '-6%',
+          height: '46%',
+          contain: 'layout paint style',
+          backgroundImage: dragonUri,
+          backgroundRepeat: 'no-repeat',
+          backgroundPosition: 'center',
+          backgroundSize: 'contain',
+          mixBlendMode: 'screen',
+          filter: 'blur(1.1px)',
+          opacity: reduced ? 0.52 : undefined,
+          animation: reduced ? 'none' : `${animDragonDrift} 30s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'transform, opacity',
+        }}
+      />
+
+      {/* Warm vignette frame — crimson edges, clear center, with a faint cheap
+          backdrop-filter for a silken haze around the rim. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backdropFilter: 'blur(0.4px) saturate(1.05)',
+          WebkitBackdropFilter: 'blur(0.4px) saturate(1.05)',
+          backgroundImage:
+            'radial-gradient(135% 120% at 50% 40%, transparent 54%, oklch(0.55 0.16 28 / 0.06) 76%, oklch(0.40 0.16 28 / 0.16) 100%)',
+        }}
+      />
+
+      {/* The garland string the lanterns hang from — a faint warm line. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: 0,
+          left: 0,
+          right: 0,
+          height: '6%',
+          contain: 'layout paint style',
+          backgroundImage: `radial-gradient(140% 80% at 50% -40%, ${GOLD.replace(
+            ')',
+            ' / 0.14)',
+          )} 0%, transparent 70%)`,
+        }}
+      />
+
+      {/* Paper lanterns. Each is a hung group: a sway wrapper rotating about its
+          mount, an inner bob, then the lantern body (glow + ribs + caps) and a
+          trailing tassel. */}
+      {lanterns.map((l, i) => {
+        const W = 30 * l.scale;
+        const H = 38 * l.scale;
+        const cap = Math.max(8, W * 0.5);
+        return (
+          <div
+            key={`lantern-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${l.left}%`,
+              top: `${l.top}%`,
+              marginLeft: `${-W / 2}px`,
+              transformOrigin: 'top center',
+              opacity: l.opacity,
+              animation: reduced
+                ? 'none'
+                : `${animLanternSway} ${l.swayDuration}s ease-in-out ${l.delay}s infinite`,
+              willChange: reduced ? undefined : 'transform',
+            }}
+          >
+            <div
+              style={{
+                animation: reduced
+                  ? 'none'
+                  : `${animLanternBob} ${l.bobDuration}s ease-in-out ${l.delay}s infinite`,
+                willChange: reduced ? undefined : 'transform',
+              }}
+            >
+              {/* short cord from the string to the top cap */}
+              <div
+                style={{
+                  width: '2px',
+                  height: `${10 * l.scale}px`,
+                  margin: '0 auto',
+                  background: `linear-gradient(${GOLD}, ${GOLD.replace(')', ' / 0.3)')})`,
+                }}
+              />
+              {/* top gold cap */}
+              <div
+                style={{
+                  width: `${cap}px`,
+                  height: `${4 * l.scale}px`,
+                  margin: '0 auto',
+                  borderRadius: `${2 * l.scale}px`,
+                  background: `linear-gradient(90deg, ${GOLD.replace(
+                    ')',
+                    ' / 0.6)',
+                  )}, ${GOLD_HI}, ${GOLD.replace(')', ' / 0.6)')})`,
+                  boxShadow: `0 0 ${5 * l.scale}px ${GOLD.replace(')', ' / 0.55)')}`,
+                }}
+              />
+              {/* lantern body */}
+              <div
+                style={{
+                  position: 'relative',
+                  width: `${W}px`,
+                  height: `${H}px`,
+                  margin: `${1 * l.scale}px auto`,
+                  borderRadius: '50% / 42%',
+                  background: `radial-gradient(circle at 38% 32%, ${VERMILION.replace(
+                    ')',
+                    ' / 0.95)',
+                  )} 0%, ${CRIMSON} 58%, oklch(0.40 0.18 26 / 0.95) 100%)`,
+                  border: `${1.2 * l.scale}px solid ${GOLD.replace(')', ' / 0.8)')}`,
+                  boxShadow: `0 0 ${16 * l.scale}px ${CRIMSON.replace(
+                    ')',
+                    ' / 0.5)',
+                  )}, inset 0 0 ${10 * l.scale}px oklch(0.78 0.16 60 / 0.35)`,
+                  overflow: 'hidden',
+                }}
+              >
+                {/* breathing inner candle glow */}
+                <div
+                  style={{
+                    position: 'absolute',
+                    left: '50%',
+                    top: '52%',
+                    width: `${W * 0.6}px`,
+                    height: `${H * 0.55}px`,
+                    marginLeft: `${-W * 0.3}px`,
+                    marginTop: `${-H * 0.275}px`,
+                    borderRadius: '50%',
+                    background: `radial-gradient(circle, ${GOLD_HI.replace(
+                      ')',
+                      ' / 0.9)',
+                    )} 0%, oklch(0.80 0.16 65 / 0.5) 45%, transparent 75%)`,
+                    filter: 'blur(1px)',
+                    animation: reduced
+                      ? 'none'
+                      : `${animGlowBreathe} ${l.bobDuration * 0.7}s ease-in-out ${
+                          l.delay
+                        }s infinite`,
+                    willChange: reduced ? undefined : 'transform, opacity',
+                  }}
+                />
+                {/* vertical paper ribs */}
+                <div
+                  style={{
+                    position: 'absolute',
+                    inset: 0,
+                    backgroundImage: `repeating-linear-gradient(90deg, transparent 0, transparent ${
+                      W / 6 - 0.6
+                    }px, ${GOLD.replace(')', ' / 0.18)')} ${W / 6 - 0.6}px, ${GOLD.replace(
+                      ')',
+                      ' / 0.18)',
+                    )} ${W / 6}px)`,
+                  }}
+                />
+              </div>
+              {/* bottom gold cap */}
+              <div
+                style={{
+                  width: `${cap}px`,
+                  height: `${4 * l.scale}px`,
+                  margin: '0 auto',
+                  borderRadius: `${2 * l.scale}px`,
+                  background: `linear-gradient(90deg, ${GOLD.replace(
+                    ')',
+                    ' / 0.6)',
+                  )}, ${GOLD_HI}, ${GOLD.replace(')', ' / 0.6)')})`,
+                }}
+              />
+              {/* swaying silk tassel */}
+              <div
+                style={{
+                  width: `${2 * l.scale}px`,
+                  height: `${16 * l.scale}px`,
+                  margin: '0 auto',
+                  transformOrigin: 'top center',
+                  background: `linear-gradient(${CRIMSON}, ${GOLD.replace(')', ' / 0.8)')})`,
+                  borderRadius: '1px',
+                  animation: reduced
+                    ? 'none'
+                    : `${animTasselSway} ${l.swayDuration * 0.8}s ease-in-out ${l.delay}s infinite`,
+                  willChange: reduced ? undefined : 'transform',
+                }}
+              />
+            </div>
+          </div>
+        );
+      })}
+
+      {/* Drifting gold plum-blossom petals (motion only). Static settled
+          blossoms render below for the reduced/preview scene. */}
+      {!reduced &&
+        petals.map((p, i) => (
+          <div
+            key={`petal-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: 0,
+              left: `${p.left}%`,
+              width: `${p.size}px`,
+              height: `${p.size}px`,
+              animation: `${animPetalSway} ${p.swayDuration}s ease-in-out ${p.delay}s infinite`,
+              willChange: 'transform',
+            }}
+          >
+            <div
+              style={{
+                width: '100%',
+                height: '100%',
+                backgroundImage: blossomUri,
+                backgroundRepeat: 'no-repeat',
+                backgroundSize: 'contain',
+                opacity: p.opacity,
+                filter: p.blur ? `blur(${p.blur}px)` : undefined,
+                animation: `${animPetalFall} ${p.duration}s linear ${p.delay}s infinite`,
+                willChange: 'transform, opacity',
+              }}
+            />
+          </div>
+        ))}
+
+      {/* Static settled blossoms for the reduced-motion / preview scene — a
+          serene scatter so the thumbnail still reads as a blossom drift. */}
+      {reduced &&
+        petals.slice(0, 12).map((p, i) => {
+          const py = rand(i + 0.5) * 92 + 4;
+          return (
+            <div
+              key={`petal-static-${i}`}
+              aria-hidden="true"
+              style={{
+                position: 'absolute',
+                left: `${p.left}%`,
+                top: `${py}%`,
+                width: `${p.size}px`,
+                height: `${p.size}px`,
+                backgroundImage: blossomUri,
+                backgroundRepeat: 'no-repeat',
+                backgroundSize: 'contain',
+                opacity: p.opacity,
+                transform: `rotate(${rand(i + 3) * 360}deg)`,
+                filter: p.blur ? `blur(${p.blur}px)` : undefined,
+              }}
+            />
+          );
+        })}
+
+      {/* Gold embers rising off the lanterns (motion only). */}
+      {!reduced &&
+        embers.map((e, i) => (
+          <div
+            key={`ember-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${e.left}%`,
+              bottom: `${e.bottom}%`,
+              width: `${e.size}px`,
+              height: `${e.size}px`,
+              borderRadius: '50%',
+              background: `radial-gradient(circle, ${GOLD_HI} 0%, ${GOLD.replace(
+                ')',
+                ' / 0.7)',
+              )} 50%, transparent 80%)`,
+              boxShadow: `0 0 5px ${GOLD.replace(')', ' / 0.6)')}`,
+              animation: `${animEmberRise} ${e.duration}s ease-in ${e.delay}s infinite`,
+              willChange: 'transform, opacity',
+            }}
+          />
+        ))}
+    </>
+  );
+}

src/app/components/seasonal/themes/NewYear.css.ts

@@ -0,0 +1,87 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * New Year overlay keyframes — a midnight celebration. Every animation touches
+ * ONLY `transform` and `opacity` so the compositor runs them on the GPU with no
+ * layout/paint. keyframes() returns the generated animation-name string, which
+ * is applied inline by the component. Heavy/static structure (gradients, SVG
+ * data-URIs, geometry) lives in the component; this module is motion only.
+ */
+
+/**
+ * Firework burst — a thin spark ring expands from a pinpoint, brightens, then
+ * fades as it grows. Scale + opacity only; the ring is a radial-gradient border
+ * supplied inline. Long pauses between bursts come from a low keyframe-duty:
+ * the ring spends most of the cycle collapsed and invisible.
+ */
+export const animBurst = keyframes({
+  '0%': { transform: 'scale(0.05)', opacity: '0' },
+  '4%': { transform: 'scale(0.12)', opacity: '0.95' },
+  '22%': { transform: 'scale(1)', opacity: '0.55' },
+  '34%': { transform: 'scale(1.25)', opacity: '0' },
+  '100%': { transform: 'scale(1.25)', opacity: '0' },
+});
+
+/**
+ * Burst core flash — the bright pinpoint at a firework's origin pops just before
+ * the ring blooms, then quickly dims. Pairs with animBurst on the same cadence.
+ */
+export const animCoreFlash = keyframes({
+  '0%': { transform: 'scale(0.2)', opacity: '0' },
+  '3%': { transform: 'scale(1)', opacity: '1' },
+  '14%': { transform: 'scale(0.6)', opacity: '0' },
+  '100%': { transform: 'scale(0.6)', opacity: '0' },
+});
+
+/**
+ * Champagne shimmer sweep — a wide soft gold band glides diagonally across the
+ * scene and breathes in brightness. translateX + opacity (never
+ * background-position) keep it on the compositor.
+ */
+export const animShimmer = keyframes({
+  '0%': { transform: 'translate3d(-120%, 0, 0) skewX(-12deg)', opacity: '0' },
+  '12%': { opacity: '0.7' },
+  '50%': { opacity: '0.5' },
+  '88%': { opacity: '0.6' },
+  '100%': { transform: 'translate3d(120%, 0, 0) skewX(-12deg)', opacity: '0' },
+});
+
+/**
+ * Confetti fall — a small sliver tumbles the full height while spinning on two
+ * axes, fading in at the top and out at the bottom. A tall translateY lets one
+ * keyframe set serve every sliver; per-piece duration/delay/scale add variety.
+ */
+export const animConfettiFall = keyframes({
+  '0%': { transform: 'translate3d(0, -10vh, 0) rotateZ(0deg) rotateX(0deg)', opacity: '0' },
+  '8%': { opacity: '0.9' },
+  '50%': { transform: 'translate3d(2.2vw, 52vh, 0) rotateZ(220deg) rotateX(180deg)' },
+  '92%': { opacity: '0.85' },
+  '100%': {
+    transform: 'translate3d(-1.8vw, 114vh, 0) rotateZ(440deg) rotateX(360deg)',
+    opacity: '0',
+  },
+});
+
+/**
+ * Lateral confetti sway on the wrapper, decoupled from the fall so the two
+ * combine into an organic drifting path rather than a straight drop.
+ */
+export const animConfettiSway = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '50%': { transform: 'translate3d(2.4vw, 0, 0)' },
+  '100%': { transform: 'translate3d(0, 0, 0)' },
+});
+
+/** Star twinkle — a sparkle pulses in brightness and size, like a glint. */
+export const animTwinkle = keyframes({
+  '0%': { transform: 'scale(0.5) rotate(0deg)', opacity: '0.2' },
+  '50%': { transform: 'scale(1) rotate(45deg)', opacity: '0.95' },
+  '100%': { transform: 'scale(0.5) rotate(0deg)', opacity: '0.2' },
+});
+
+/** Barely-there breathing of the midnight tint so the static base feels alive. */
+export const animSkyPulse = keyframes({
+  '0%': { opacity: '0.82' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.82' },
+});

src/app/components/seasonal/themes/NewYear.tsx

@@ -0,0 +1,303 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animBurst,
+  animCoreFlash,
+  animShimmer,
+  animConfettiFall,
+  animConfettiSway,
+  animTwinkle,
+  animSkyPulse,
+} from './NewYear.css';
+
+/**
+ * New Year overlay — a midnight celebration. Layered oklch gradients sink the
+ * app into a deep navy night; fireworks bloom as expanding spark rings, a
+ * champagne-gold shimmer sweeps across, confetti slivers tumble down, and
+ * sparkle stars twinkle. All motion is transform/opacity only.
+ *
+ * Palette (oklch): midnight navy oklch(0.20 0.07 260), champagne gold
+ * oklch(0.85 0.13 90), bursts in magenta oklch(0.7 0.22 350), cyan
+ * oklch(0.8 0.15 200), and gold.
+ *
+ * RENDERING CONTRACT: the parent supplies a fixed inset:0 overflow:hidden
+ * pointer-events:none container at the right z-index. We only return
+ * absolutely-positioned aria-hidden children at low opacity — no z-index,
+ * position:fixed, or pointer-events here — kept well below opaque so chat text
+ * stays WCAG-AA legible.
+ *
+ * REDUCED MOTION: when `reduced`, render a static but gorgeous scene (a frozen
+ * firework bloom mid-burst, scattered gold confetti, a still shimmer band) with
+ * no `animation` at all. The settings preview always passes reduced=true.
+ */
+
+const BURST_HUES = [
+  // [ring oklch, core oklch]
+  ['oklch(0.7 0.22 350)', 'oklch(0.88 0.14 350)'], // magenta
+  ['oklch(0.8 0.15 200)', 'oklch(0.92 0.1 200)'], // cyan
+  ['oklch(0.85 0.13 90)', 'oklch(0.95 0.09 95)'], // gold
+  ['oklch(0.75 0.2 30)', 'oklch(0.9 0.12 40)'], // warm coral
+] as const;
+
+const CONFETTI_COLORS = [
+  'oklch(0.85 0.13 90)', // champagne gold
+  'oklch(0.7 0.22 350)', // magenta
+  'oklch(0.8 0.15 200)', // cyan
+  'oklch(0.9 0.06 90)', // pale gold
+  'oklch(0.78 0.18 30)', // coral
+] as const;
+
+type Burst = {
+  top: number;
+  left: number;
+  size: number;
+  ring: string;
+  core: string;
+  duration: number;
+  delay: number;
+};
+
+type Confetto = {
+  left: number;
+  w: number;
+  h: number;
+  color: string;
+  round: boolean;
+  fallDur: number;
+  swayDur: number;
+  delay: number;
+};
+
+type Star = {
+  top: number;
+  left: number;
+  size: number;
+  color: string;
+  duration: number;
+  delay: number;
+};
+
+// Deterministic pseudo-random so the memoized scene is stable across renders.
+const rand = (seed: number) => {
+  const x = Math.sin(seed * 12.9898 + 78.233) * 43758.5453;
+  return x - Math.floor(x);
+};
+
+// A four-point sparkle (gleam) as an inline SVG data-URI — CSP-safe, no assets.
+const sparkleUri = (color: string) =>
+  `url("data:image/svg+xml,${encodeURIComponent(
+    `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M12 0 L14 10 L24 12 L14 14 L12 24 L10 14 L0 12 L10 10 Z' fill='${color}'/></svg>`,
+  )}")`;
+
+export function NewYearOverlay({ reduced }: SeasonalOverlayProps) {
+  const bursts = useMemo<Burst[]>(
+    () =>
+      // Bursts cluster in the upper two-thirds of the sky, away from typical text.
+      Array.from({ length: 7 }, (_, i) => {
+        const hue = BURST_HUES[i % BURST_HUES.length];
+        return {
+          top: 8 + rand(i + 1) * 48,
+          left: 8 + rand(i + 11) * 84,
+          size: 130 + Math.floor(rand(i + 21) * 110),
+          ring: hue[0],
+          core: hue[1],
+          duration: 6.5 + rand(i + 31) * 4,
+          delay: rand(i + 41) * 9,
+        };
+      }),
+    [],
+  );
+
+  const confetti = useMemo<Confetto[]>(
+    () =>
+      Array.from({ length: 20 }, (_, i) => ({
+        left: rand(i + 101) * 100,
+        w: 4 + Math.floor(rand(i + 111) * 4),
+        h: 7 + Math.floor(rand(i + 121) * 7),
+        color: CONFETTI_COLORS[i % CONFETTI_COLORS.length],
+        round: i % 4 === 0,
+        fallDur: 9 + rand(i + 131) * 7,
+        swayDur: 3 + rand(i + 141) * 3,
+        delay: rand(i + 151) * 10,
+      })),
+    [],
+  );
+
+  const stars = useMemo<Star[]>(
+    () =>
+      Array.from({ length: 9 }, (_, i) => ({
+        top: 4 + rand(i + 201) * 64,
+        left: 4 + rand(i + 211) * 92,
+        size: 8 + Math.floor(rand(i + 221) * 10),
+        color: i % 2 === 0 ? 'oklch(0.85 0.13 90)' : 'oklch(0.92 0.06 200)',
+        duration: 3 + rand(i + 231) * 3,
+        delay: rand(i + 241) * 4,
+      })),
+    [],
+  );
+
+  return (
+    <>
+      {/* Midnight sky — layered oklch gradients for depth, with a faint breathe. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundColor: 'oklch(0.2 0.07 260 / 0.12)',
+          backgroundImage: [
+            'radial-gradient(120% 90% at 50% -10%, oklch(0.32 0.1 280 / 0.16) 0%, transparent 60%)',
+            'radial-gradient(90% 70% at 18% 8%, oklch(0.7 0.22 350 / 0.07) 0%, transparent 55%)',
+            'radial-gradient(90% 70% at 84% 4%, oklch(0.8 0.15 200 / 0.07) 0%, transparent 55%)',
+            'radial-gradient(140% 120% at 50% 120%, oklch(0.2 0.07 260 / 0.14) 0%, transparent 70%)',
+          ].join(','),
+          animation: reduced ? 'none' : `${animSkyPulse} 9s ease-in-out infinite`,
+        }}
+      />
+
+      {/* Champagne-gold shimmer sweep. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: 0,
+          bottom: 0,
+          left: 0,
+          width: '55%',
+          contain: 'layout paint style',
+          backgroundImage:
+            'linear-gradient(100deg, transparent 0%, oklch(0.85 0.13 90 / 0.05) 38%, oklch(0.95 0.09 95 / 0.1) 50%, oklch(0.85 0.13 90 / 0.05) 62%, transparent 100%)',
+          transform: reduced ? 'translate3d(30%, 0, 0) skewX(-12deg)' : undefined,
+          opacity: reduced ? 0.45 : undefined,
+          animation: reduced ? 'none' : `${animShimmer} 11s ease-in-out infinite`,
+        }}
+      />
+
+      {/* Fireworks — expanding spark rings + a core flash. In reduced mode we
+          freeze the first burst mid-bloom and drop the rest. */}
+      {(reduced ? bursts.slice(0, 1) : bursts).map((b, i) => (
+        <div
+          key={`b${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            top: `${b.top}%`,
+            left: `${b.left}%`,
+            width: `${b.size}px`,
+            height: `${b.size}px`,
+            marginLeft: `${-b.size / 2}px`,
+            marginTop: `${-b.size / 2}px`,
+          }}
+        >
+          {/* Spark ring */}
+          <div
+            style={{
+              position: 'absolute',
+              inset: 0,
+              borderRadius: '50%',
+              willChange: reduced ? undefined : 'transform, opacity',
+              background: `radial-gradient(circle, transparent 56%, ${b.ring} 64%, transparent 74%)`,
+              transform: reduced ? 'scale(0.82)' : undefined,
+              opacity: reduced ? 0.6 : undefined,
+              animation: reduced
+                ? 'none'
+                : `${animBurst} ${b.duration}s ease-out ${b.delay}s infinite`,
+            }}
+          />
+          {/* Inner secondary ring for a fuller bloom */}
+          <div
+            style={{
+              position: 'absolute',
+              inset: '18%',
+              borderRadius: '50%',
+              background: `radial-gradient(circle, transparent 50%, ${b.ring} 60%, transparent 72%)`,
+              transform: reduced ? 'scale(0.7)' : undefined,
+              opacity: reduced ? 0.4 : undefined,
+              animation: reduced
+                ? 'none'
+                : `${animBurst} ${b.duration}s ease-out ${b.delay + 0.12}s infinite`,
+            }}
+          />
+          {/* Core flash */}
+          <div
+            style={{
+              position: 'absolute',
+              left: '50%',
+              top: '50%',
+              width: '14%',
+              height: '14%',
+              marginLeft: '-7%',
+              marginTop: '-7%',
+              borderRadius: '50%',
+              background: `radial-gradient(circle, ${b.core} 0%, transparent 70%)`,
+              transform: reduced ? 'scale(0.9)' : undefined,
+              opacity: reduced ? 0.85 : undefined,
+              animation: reduced
+                ? 'none'
+                : `${animCoreFlash} ${b.duration}s ease-out ${b.delay}s infinite`,
+            }}
+          />
+        </div>
+      ))}
+
+      {/* Twinkling sparkle stars. */}
+      {stars.map((s, i) => (
+        <div
+          key={`s${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            top: `${s.top}%`,
+            left: `${s.left}%`,
+            width: `${s.size}px`,
+            height: `${s.size}px`,
+            backgroundImage: sparkleUri(s.color),
+            backgroundRepeat: 'no-repeat',
+            backgroundSize: 'contain',
+            transform: reduced ? 'scale(0.9) rotate(30deg)' : undefined,
+            opacity: reduced ? 0.75 : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animTwinkle} ${s.duration}s ease-in-out ${s.delay}s infinite`,
+          }}
+        />
+      ))}
+
+      {/* Falling confetti slivers. In reduced mode, a still scatter at varied
+          heights so the static thumbnail reads as a celebration in progress. */}
+      {confetti.map((c, i) => {
+        const staticTop = reduced ? 6 + rand(i + 301) * 78 : undefined;
+        return (
+          <div
+            key={`c${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: reduced ? `${staticTop}%` : 0,
+              left: `${c.left}%`,
+              willChange: reduced ? undefined : 'transform',
+              animation: reduced
+                ? 'none'
+                : `${animConfettiSway} ${c.swayDur}s ease-in-out ${c.delay}s infinite`,
+            }}
+          >
+            <div
+              style={{
+                width: `${c.w}px`,
+                height: reduced && c.round ? `${c.w}px` : `${c.h}px`,
+                borderRadius: c.round ? '50%' : '1px',
+                backgroundColor: c.color,
+                opacity: reduced ? 0.8 : 0.85,
+                transform: reduced ? `rotate(${Math.floor(rand(i + 311) * 360)}deg)` : undefined,
+                animation: reduced
+                  ? 'none'
+                  : `${animConfettiFall} ${c.fallDur}s ease-in ${c.delay}s infinite`,
+              }}
+            />
+          </div>
+        );
+      })}
+    </>
+  );
+}

src/app/components/seasonal/themes/StPatricks.css.ts

@@ -0,0 +1,67 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Clover tumble — a shamrock silhouette drifts down while tumbling on two axes.
+ * GPU-only: a single tall translateY plus rotate; per-clover duration/delay and
+ * a decoupled sway (below) create organic, non-repeating paths. The horizontal
+ * offsets stay small so clovers fall roughly in their column.
+ */
+export const animCloverTumble = keyframes({
+  '0%': { transform: 'translate3d(0, -10vh, 0) rotate(0deg)', opacity: '0' },
+  '8%': { opacity: '1' },
+  '50%': { transform: 'translate3d(12px, 50vh, 0) rotate(220deg)' },
+  '92%': { opacity: '0.8' },
+  '100%': { transform: 'translate3d(-8px, 114vh, 0) rotate(420deg)', opacity: '0' },
+});
+
+/**
+ * Lateral sway applied to a clover's wrapper so the descent reads as a leaf
+ * caught by a breeze, decoupled from the fall for an organic combined path.
+ */
+export const animCloverSway = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '50%': { transform: 'translate3d(20px, 0, 0)' },
+  '100%': { transform: 'translate3d(0, 0, 0)' },
+});
+
+/**
+ * Verdant ambiance breathe — the emerald wash and vignette gently swell so the
+ * static tint feels alive without distracting motion. Opacity only.
+ */
+export const animVerdantBreathe = keyframes({
+  '0%': { opacity: '0.8' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.8' },
+});
+
+/**
+ * Rainbow shimmer — the soft arc in the corner slowly slides and breathes.
+ * Uses translate + scale + opacity (never background-position) so it stays on
+ * the compositor.
+ */
+export const animRainbowShimmer = keyframes({
+  '0%': { transform: 'translate3d(-3%, 1%, 0) scale(1)', opacity: '0.45' },
+  '50%': { transform: 'translate3d(3%, -1%, 0) scale(1.04)', opacity: '0.7' },
+  '100%': { transform: 'translate3d(-3%, 1%, 0) scale(1)', opacity: '0.45' },
+});
+
+/**
+ * Gold coin glint — a metallic disc tilts and brightens as a struck-light
+ * flicker, then settles. Transform + opacity only so it composites cheaply.
+ */
+export const animCoinGlint = keyframes({
+  '0%': { transform: 'scale(0.9) rotate(-8deg)', opacity: '0.35' },
+  '20%': { transform: 'scale(1.06) rotate(0deg)', opacity: '0.9' },
+  '45%': { transform: 'scale(0.94) rotate(6deg)', opacity: '0.5' },
+  '100%': { transform: 'scale(0.9) rotate(-8deg)', opacity: '0.35' },
+});
+
+/**
+ * Sparkle mote twinkle — a tiny golden point pulses in scale and brightness
+ * like a struck spark of luck. Opacity + transform only.
+ */
+export const animMoteTwinkle = keyframes({
+  '0%': { transform: 'scale(0.5)', opacity: '0.1' },
+  '50%': { transform: 'scale(1.25)', opacity: '0.95' },
+  '100%': { transform: 'scale(0.5)', opacity: '0.1' },
+});

src/app/components/seasonal/themes/StPatricks.tsx

@@ -0,0 +1,325 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animCloverTumble,
+  animCloverSway,
+  animVerdantBreathe,
+  animRainbowShimmer,
+  animCoinGlint,
+  animMoteTwinkle,
+} from './StPatricks.css';
+
+// Deterministic pseudo-random so the scene is identical every mount (no React
+// state per frame). Large primes keep the distribution well spread.
+const rand = (seed: number) => {
+  const x = Math.sin(seed * 127.1 + 311.7) * 43758.5453;
+  return x - Math.floor(x);
+};
+
+// Shamrock (three-leaf) and lucky four-leaf clover silhouettes as inline SVG
+// data-URIs — pure CSS, no external assets, Tauri/CSP-safe. The `fill` color is
+// baked per-variant in oklch-adjacent sRGB (data-URIs can't carry oklch), kept
+// luminous green so the glyphs read as foliage even at low opacity.
+const cloverSvg = (leaves: 3 | 4, fill: string) => {
+  // Each leaf is a heart-ish lobe; petals arranged radially around the stem.
+  const heart = 'M0,-2 C5,-12 18,-9 14,2 C12,8 4,9 0,3 C-4,9 -12,8 -14,2 C-18,-9 -5,-12 0,-2 Z';
+  // Rotations for the lobes; 3-leaf = 120° spread, 4-leaf = 90° spread.
+  const rots = leaves === 4 ? [0, 90, 180, 270] : [-90, 30, 150];
+  const lobes = rots
+    .map((r) => `<path d="${heart}" transform="rotate(${r}) translate(0 -12)"/>`)
+    .join('');
+  const stem = `<path d="M0,8 C-1,18 2,26 0,34" stroke="${
+    fill
+  }" stroke-width="2.4" fill="none" stroke-linecap="round"/>`;
+  const svg =
+    `<svg xmlns="http://www.w3.org/2000/svg" viewBox="-26 -26 52 64">` +
+    `<g fill="${fill}">${lobes}</g>${stem}</svg>`;
+  return `url("data:image/svg+xml,${encodeURIComponent(svg)}")`;
+};
+
+// Three foliage greens for parallax depth — far/dim through near/bright. These
+// are the sRGB siblings of the brief's oklch emerald / shamrock-green targets.
+const CLOVER_FILLS = [
+  '#1f9e54', // deep shamrock (far)
+  '#2db866', // emerald (mid)
+  '#48d97f', // bright clover (near)
+];
+
+type Clover = {
+  left: number;
+  size: number;
+  duration: number;
+  delay: number;
+  swayDuration: number;
+  opacity: number;
+  blur: number;
+  fill: string;
+  leaves: 3 | 4;
+  // Resting position + tilt for the static (reduced) settled scene.
+  restTop: number;
+  restRot: number;
+};
+
+type Coin = {
+  left: number;
+  top: number;
+  size: number;
+  duration: number;
+  delay: number;
+};
+
+type Mote = {
+  left: number;
+  top: number;
+  size: number;
+  duration: number;
+  delay: number;
+};
+
+export function StPatricksOverlay({ reduced }: SeasonalOverlayProps) {
+  // Three parallax bands of clovers: far (small/slow/dim) -> near (large/fast).
+  // ~22 clovers total; one lucky four-leaf seeded in for charm.
+  const clovers = useMemo<Clover[]>(() => {
+    const bands = [
+      { count: 8, size: [12, 18], dur: [20, 26], op: [0.22, 0.34], blur: 0.8, fill: 0 },
+      { count: 8, size: [18, 26], dur: [15, 20], op: [0.34, 0.5], blur: 0.4, fill: 1 },
+      { count: 6, size: [26, 38], dur: [11, 15], op: [0.46, 0.62], blur: 0, fill: 2 },
+    ];
+    const out: Clover[] = [];
+    let s = 1;
+    bands.forEach((b) => {
+      for (let i = 0; i < b.count; i += 1) {
+        const r1 = rand(s);
+        const r2 = rand(s + 0.37);
+        const r3 = rand(s + 0.71);
+        const r4 = rand(s + 0.91);
+        const r5 = rand(s + 1.13);
+        out.push({
+          left: r1 * 100,
+          size: b.size[0] + r2 * (b.size[1] - b.size[0]),
+          duration: b.dur[0] + r3 * (b.dur[1] - b.dur[0]),
+          delay: -r4 * (b.dur[1] + 5),
+          swayDuration: 5 + r2 * 6,
+          opacity: b.op[0] + r3 * (b.op[1] - b.op[0]),
+          blur: b.blur,
+          // The single lucky four-leaf: one mid-band clover.
+          leaves: s === 10 ? 4 : 3,
+          fill: CLOVER_FILLS[b.fill],
+          restTop: 6 + r5 * 88,
+          restRot: (r4 - 0.5) * 80,
+        });
+        s += 1;
+      }
+    });
+    return out;
+  }, []);
+
+  // Gold-coin glints scattered low — a faint pot-of-gold sparkle. ~5 discs.
+  const coins = useMemo<Coin[]>(() => {
+    const count = 5;
+    const out: Coin[] = [];
+    for (let i = 0; i < count; i += 1) {
+      out.push({
+        left: 8 + rand(i + 40) * 84,
+        top: 58 + rand(i + 47) * 36,
+        size: 8 + rand(i + 51) * 9,
+        duration: 4 + rand(i + 55) * 3,
+        delay: -rand(i + 61) * 6,
+      });
+    }
+    return out;
+  }, []);
+
+  // Golden sparkle motes drifting through the scene. ~7 points.
+  const motes = useMemo<Mote[]>(() => {
+    const count = 7;
+    const out: Mote[] = [];
+    for (let i = 0; i < count; i += 1) {
+      out.push({
+        left: rand(i + 70) * 100,
+        top: 8 + rand(i + 77) * 82,
+        size: 2 + rand(i + 83) * 3,
+        duration: 3 + rand(i + 89) * 3.5,
+        delay: -rand(i + 97) * 6,
+      });
+    }
+    return out;
+  }, []);
+
+  return (
+    <>
+      {/* Emerald ambient wash — layered radial + linear oklch gradients for
+          depth. Kept low-opacity so chat text stays legible (WCAG-AA). */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundImage: [
+            'radial-gradient(120% 85% at 50% -12%, oklch(0.60 0.16 150 / 0.16) 0%, transparent 56%)',
+            'radial-gradient(90% 65% at 12% 112%, oklch(0.55 0.15 145 / 0.12) 0%, transparent 60%)',
+            'radial-gradient(80% 60% at 92% 108%, oklch(0.82 0.14 90 / 0.07) 0%, transparent 62%)',
+            'linear-gradient(180deg, oklch(0.62 0.15 150 / 0.05) 0%, transparent 24%, transparent 82%, oklch(0.5 0.14 148 / 0.08) 100%)',
+          ].join(','),
+        }}
+      />
+
+      {/* Verdant vignette frame — green edges, clear center. A single cheap
+          backdrop-filter adds a faint warm-emerald haze around the rim. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backdropFilter: 'blur(0.4px) saturate(1.05)',
+          WebkitBackdropFilter: 'blur(0.4px) saturate(1.05)',
+          backgroundImage:
+            'radial-gradient(140% 125% at 50% 44%, transparent 50%, oklch(0.6 0.13 150 / 0.07) 74%, oklch(0.48 0.14 148 / 0.17) 100%)',
+          animation: reduced ? 'none' : `${animVerdantBreathe} 13s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'opacity',
+        }}
+      />
+
+      {/* Soft rainbow shimmer arc tucked into the top-right corner — a faint
+          luck-of-the-Irish band. Heavily blurred + screen-blended so it reads
+          as light, never as a hard stripe over chat. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          top: '-22%',
+          right: '-18%',
+          width: '62%',
+          height: '62%',
+          contain: 'layout paint style',
+          mixBlendMode: 'screen',
+          filter: 'blur(30px)',
+          opacity: reduced ? 0.6 : undefined,
+          // Concentric arc bands — red through violet, all low alpha.
+          backgroundImage: [
+            'radial-gradient(closest-side at 78% 28%, transparent 58%, oklch(0.7 0.18 28 / 0.16) 62%, transparent 67%)',
+            'radial-gradient(closest-side at 78% 28%, transparent 63%, oklch(0.82 0.16 80 / 0.16) 67%, transparent 72%)',
+            'radial-gradient(closest-side at 78% 28%, transparent 68%, oklch(0.85 0.17 130 / 0.16) 72%, transparent 77%)',
+            'radial-gradient(closest-side at 78% 28%, transparent 73%, oklch(0.72 0.15 230 / 0.15) 77%, transparent 82%)',
+            'radial-gradient(closest-side at 78% 28%, transparent 78%, oklch(0.6 0.16 300 / 0.13) 82%, transparent 87%)',
+          ].join(','),
+          animation: reduced ? 'none' : `${animRainbowShimmer} 20s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'transform, opacity',
+        }}
+      />
+
+      {/* Gold-coin glints — small metallic discs that catch the light. */}
+      {coins.map((c, i) => (
+        <div
+          key={`coin-${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${c.left}%`,
+            top: `${c.top}%`,
+            width: `${c.size}px`,
+            height: `${c.size}px`,
+            borderRadius: '50%',
+            background:
+              'radial-gradient(circle at 36% 32%, oklch(0.97 0.06 95 / 0.95) 0%, oklch(0.82 0.14 90 / 0.85) 45%, oklch(0.68 0.13 78 / 0.4) 78%, transparent 100%)',
+            boxShadow: `0 0 ${c.size * 0.9}px ${c.size * 0.35}px oklch(0.82 0.14 90 / 0.4)`,
+            opacity: reduced ? 0.85 : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animCoinGlint} ${c.duration}s ease-in-out ${c.delay}s infinite`,
+            willChange: reduced ? undefined : 'transform, opacity',
+          }}
+        />
+      ))}
+
+      {/* Golden sparkle motes — tiny four-point glints of luck. */}
+      {motes.map((m, i) => (
+        <div
+          key={`mote-${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${m.left}%`,
+            top: `${m.top}%`,
+            width: `${m.size}px`,
+            height: `${m.size}px`,
+            borderRadius: '50%',
+            background:
+              'radial-gradient(circle, oklch(0.98 0.05 95 / 0.95) 0%, oklch(0.85 0.13 88 / 0.6) 50%, transparent 100%)',
+            boxShadow: '0 0 6px oklch(0.85 0.13 88 / 0.6)',
+            opacity: reduced ? 0.9 : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animMoteTwinkle} ${m.duration}s ease-in-out ${m.delay}s infinite`,
+            willChange: reduced ? undefined : 'transform, opacity',
+          }}
+        />
+      ))}
+
+      {/* Drifting clovers (motion only) — three parallax bands tumbling down.
+          Settled static scatter is rendered below for reduced/preview. */}
+      {!reduced &&
+        clovers.map((c, i) => (
+          <div
+            key={`clover-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: 0,
+              left: `${c.left}%`,
+              width: `${c.size}px`,
+              height: `${c.size * 1.2}px`,
+              animation: `${animCloverSway} ${c.swayDuration}s ease-in-out ${c.delay}s infinite`,
+              willChange: 'transform',
+            }}
+          >
+            <div
+              style={{
+                width: '100%',
+                height: '100%',
+                backgroundImage: cloverSvg(c.leaves, c.fill),
+                backgroundRepeat: 'no-repeat',
+                backgroundSize: 'contain',
+                backgroundPosition: 'center',
+                opacity: c.opacity,
+                filter: `drop-shadow(0 0 3px oklch(0.55 0.15 145 / 0.4))${
+                  c.blur ? ` blur(${c.blur}px)` : ''
+                }`,
+                animation: `${animCloverTumble} ${c.duration}s linear ${c.delay}s infinite`,
+                willChange: 'transform, opacity',
+              }}
+            />
+          </div>
+        ))}
+
+      {/* Static settled clovers for the reduced-motion / preview scene — a
+          gentle scatter resting at varied tilts so the thumbnail reads as a
+          lucky, still field of shamrocks. */}
+      {reduced &&
+        clovers.map((c, i) => (
+          <div
+            key={`clover-static-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${c.left}%`,
+              top: `${c.restTop}%`,
+              width: `${c.size}px`,
+              height: `${c.size * 1.2}px`,
+              backgroundImage: cloverSvg(c.leaves, c.fill),
+              backgroundRepeat: 'no-repeat',
+              backgroundSize: 'contain',
+              backgroundPosition: 'center',
+              transform: `rotate(${c.restRot}deg)`,
+              opacity: c.opacity,
+              filter: `drop-shadow(0 0 3px oklch(0.55 0.15 145 / 0.4))${
+                c.blur ? ` blur(${c.blur}px)` : ''
+              }`,
+            }}
+          />
+        ))}
+    </>
+  );
+}

src/app/components/seasonal/themes/Valentines.css.ts

@@ -0,0 +1,70 @@
+import { keyframes } from '@vanilla-extract/css';
+
+/**
+ * Heart rise — a soft heart drifts gently upward while bobbing sideways and
+ * breathing in scale, like a balloon caught in a warm draft. GPU-only: animates
+ * transform + opacity exclusively. The tall translateY lets one keyframe set
+ * serve every heart; per-heart duration/delay/scale supply the variety.
+ */
+export const animHeartRise = keyframes({
+  '0%': { transform: 'translate3d(0, 8vh, 0) scale(0.7) rotate(-6deg)', opacity: '0' },
+  '10%': { opacity: '1' },
+  '50%': { transform: 'translate3d(18px, -46vh, 0) scale(1) rotate(5deg)' },
+  '88%': { opacity: '0.85' },
+  '100%': { transform: 'translate3d(-12px, -108vh, 0) scale(1.12) rotate(-4deg)', opacity: '0' },
+});
+
+/**
+ * Heart bob — a small lateral sway applied to each heart's wrapper so the rise
+ * reads as a wandering draft, decoupled from the vertical travel so the two
+ * combine into an organic path. Transform only.
+ */
+export const animHeartBob = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0)' },
+  '50%': { transform: 'translate3d(16px, 0, 0)' },
+  '100%': { transform: 'translate3d(0, 0, 0)' },
+});
+
+/**
+ * Petal tumble — a rose petal falls while swaying horizontally and tumbling on
+ * its own axis, the way a real petal flutters. Opacity + transform only.
+ */
+export const animPetalTumble = keyframes({
+  '0%': { transform: 'translate3d(0, -8vh, 0) rotate(0deg)', opacity: '0' },
+  '8%': { opacity: '0.9' },
+  '30%': { transform: 'translate3d(30px, 28vh, 0) rotate(120deg)' },
+  '60%': { transform: 'translate3d(-26px, 62vh, 0) rotate(250deg)' },
+  '92%': { opacity: '0.7' },
+  '100%': { transform: 'translate3d(14px, 112vh, 0) rotate(380deg)', opacity: '0' },
+});
+
+/**
+ * Bokeh breathe — dreamy blush orbs softly pulse in scale and brightness, like
+ * soft-focus lights drifting in and out of focus. Opacity + transform only.
+ */
+export const animBokehBreathe = keyframes({
+  '0%': { transform: 'translate3d(0, 0, 0) scale(0.9)', opacity: '0.45' },
+  '50%': { transform: 'translate3d(0, -10px, 0) scale(1.12)', opacity: '0.9' },
+  '100%': { transform: 'translate3d(0, 0, 0) scale(0.9)', opacity: '0.45' },
+});
+
+/**
+ * Blush pulse — a barely-there breathing of the warm vignette so the static
+ * tint feels alive and tender without distracting motion. Opacity only.
+ */
+export const animBlushPulse = keyframes({
+  '0%': { opacity: '0.82' },
+  '50%': { opacity: '1' },
+  '100%': { opacity: '0.82' },
+});
+
+/**
+ * Sparkle glint — a faint highlight winks on and off with a gentle scale, a
+ * romantic twinkle that never strobes. Transform + opacity only.
+ */
+export const animSparkle = keyframes({
+  '0%': { transform: 'scale(0.4) rotate(0deg)', opacity: '0' },
+  '15%': { transform: 'scale(1) rotate(45deg)', opacity: '0.9' },
+  '35%': { transform: 'scale(0.55) rotate(90deg)', opacity: '0' },
+  '100%': { transform: 'scale(0.4) rotate(90deg)', opacity: '0' },
+});

src/app/components/seasonal/themes/Valentines.tsx

@@ -0,0 +1,405 @@
+import React, { useMemo } from 'react';
+import { SeasonalOverlayProps } from '../types';
+import {
+  animHeartRise,
+  animHeartBob,
+  animPetalTumble,
+  animBokehBreathe,
+  animBlushPulse,
+  animSparkle,
+} from './Valentines.css';
+
+// Deterministic pseudo-random so the scene is identical every mount (no React
+// state per frame). Large primes keep the distribution well spread.
+const rand = (seed: number) => {
+  const x = Math.sin(seed * 127.1 + 311.7) * 43758.5453;
+  return x - Math.floor(x);
+};
+
+// Romantic oklch palette — rose, blush pink, warm red, soft cream. Kept
+// luminous and gentle so everything reads as soft ambient glow over chat.
+const ROSE = 'oklch(0.7 0.15 10)';
+const BLUSH = 'oklch(0.9 0.06 350)';
+const WARM_RED = 'oklch(0.6 0.18 20)';
+const CREAM = 'oklch(0.96 0.03 60)';
+
+const HEART_COLORS = [ROSE, BLUSH, WARM_RED, 'oklch(0.78 0.13 5)'];
+const PETAL_COLORS = [
+  'oklch(0.66 0.16 12)', // rose
+  'oklch(0.74 0.13 6)', // lighter rose
+  'oklch(0.6 0.18 20)', // warm red
+];
+
+// Inline SVG (data-URI) so it is fully Tauri/CSP-safe — no external assets.
+// A soft heart with a gradient fill and a cream highlight glint.
+const heartSvg = (fill: string, glint: string) => {
+  const svg = `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'>
+<defs><radialGradient id='g' cx='38%' cy='32%' r='75%'>
+<stop offset='0%' stop-color='${glint}'/><stop offset='55%' stop-color='${fill}'/>
+<stop offset='100%' stop-color='${fill}' stop-opacity='0.85'/></radialGradient></defs>
+<path fill='url(%23g)' d='M16 28C16 28 3 19.5 3 11.2 3 6.8 6.4 4 10 4c2.6 0 4.7 1.5 6 3.6C17.3 5.5 19.4 4 22 4c3.6 0 7 2.8 7 7.2C29 19.5 16 28 16 28z'/></svg>`;
+  return `url("data:image/svg+xml,${svg.replace(/\n/g, '').replace(/#/g, '%23')}")`;
+};
+
+// A single rose petal — a soft teardrop/ovate shape with an inner crease,
+// gently asymmetric so the tumble reads as a real petal.
+const petalSvg = (fill: string) => {
+  const svg = `<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 32'>
+<defs><linearGradient id='p' x1='0' y1='0' x2='1' y2='1'>
+<stop offset='0%' stop-color='${fill}' stop-opacity='0.6'/>
+<stop offset='100%' stop-color='${fill}'/></linearGradient></defs>
+<path fill='url(%23p)' d='M12 1C5 8 2 16 4 24c1.4 5.4 6 7 8 7s6.6-1.6 8-7C22 16 19 8 12 1z'/>
+<path d='M12 4C9 11 8 18 11 30' stroke='${fill}' stroke-opacity='0.35' stroke-width='1' fill='none'/></svg>`;
+  return `url("data:image/svg+xml,${svg.replace(/\n/g, '').replace(/#/g, '%23')}")`;
+};
+
+type Heart = {
+  left: number;
+  size: number;
+  duration: number;
+  delay: number;
+  bobDuration: number;
+  opacity: number;
+  blur: number;
+  image: string;
+  restTop: number; // static resting position for reduced scene
+};
+
+type Petal = {
+  left: number;
+  size: number;
+  duration: number;
+  delay: number;
+  opacity: number;
+  image: string;
+  rotate: number;
+  restTop: number;
+};
+
+type Bokeh = {
+  left: number;
+  top: number;
+  size: number;
+  color: string;
+  duration: number;
+  delay: number;
+};
+
+type Sparkle = {
+  left: number;
+  top: number;
+  size: number;
+  duration: number;
+  delay: number;
+};
+
+export function ValentinesOverlay({ reduced }: SeasonalOverlayProps) {
+  // Three parallax bands of hearts: far (small/slow/dim) -> near (large/fast).
+  const hearts = useMemo<Heart[]>(() => {
+    const bands = [
+      { count: 4, size: [12, 18], dur: [20, 26], op: [0.3, 0.5], blur: 0.8 },
+      { count: 4, size: [18, 26], dur: [15, 19], op: [0.5, 0.72], blur: 0.3 },
+      { count: 3, size: [26, 38], dur: [12, 15], op: [0.62, 0.85], blur: 0 },
+    ];
+    const out: Heart[] = [];
+    let s = 1;
+    bands.forEach((b) => {
+      for (let i = 0; i < b.count; i += 1) {
+        const r1 = rand(s);
+        const r2 = rand(s + 0.37);
+        const r3 = rand(s + 0.71);
+        const r4 = rand(s + 0.91);
+        const fill = HEART_COLORS[Math.floor(r4 * HEART_COLORS.length) % HEART_COLORS.length];
+        out.push({
+          left: r1 * 96 + 2,
+          size: b.size[0] + r2 * (b.size[1] - b.size[0]),
+          duration: b.dur[0] + r3 * (b.dur[1] - b.dur[0]),
+          delay: -r4 * (b.dur[1] + 5),
+          bobDuration: 5 + r2 * 5,
+          opacity: b.op[0] + r3 * (b.op[1] - b.op[0]),
+          blur: b.blur,
+          image: heartSvg(fill, CREAM),
+          restTop: 6 + r3 * 86,
+        });
+        s += 1;
+      }
+    });
+    return out;
+  }, []);
+
+  // Drifting rose petals tumbling down — a gentle counter-motion to the hearts.
+  const petals = useMemo<Petal[]>(() => {
+    const count = 8;
+    const out: Petal[] = [];
+    for (let i = 0; i < count; i += 1) {
+      const r1 = rand(i + 40);
+      const r2 = rand(i + 40.5);
+      const r3 = rand(i + 40.9);
+      const fill = PETAL_COLORS[i % PETAL_COLORS.length];
+      out.push({
+        left: r1 * 98,
+        size: 9 + r2 * 9,
+        duration: 14 + r3 * 9,
+        delay: -r1 * 22,
+        opacity: 0.45 + r2 * 0.35,
+        image: petalSvg(fill),
+        rotate: r3 * 360,
+        restTop: 4 + r2 * 90,
+      });
+    }
+    return out;
+  }, []);
+
+  // Dreamy blush bokeh orbs scattered across the scene, softly breathing.
+  const bokeh = useMemo<Bokeh[]>(() => {
+    const count = 7;
+    const out: Bokeh[] = [];
+    for (let i = 0; i < count; i += 1) {
+      const r1 = rand(i + 70);
+      const r2 = rand(i + 70.4);
+      const r3 = rand(i + 70.8);
+      out.push({
+        left: r1 * 94 + 3,
+        top: r2 * 88 + 4,
+        size: 70 + r3 * 130,
+        color: i % 2 === 0 ? BLUSH : 'oklch(0.82 0.1 355)',
+        duration: 9 + r3 * 7,
+        delay: -r1 * 10,
+      });
+    }
+    return out;
+  }, []);
+
+  // Faint sparkle glints — sparse, never strobing.
+  const sparkles = useMemo<Sparkle[]>(() => {
+    const count = 5;
+    const out: Sparkle[] = [];
+    for (let i = 0; i < count; i += 1) {
+      const r1 = rand(i + 200);
+      const r2 = rand(i + 200.5);
+      const r3 = rand(i + 200.9);
+      out.push({
+        left: r1 * 92 + 4,
+        top: r2 * 80 + 6,
+        size: 6 + r3 * 8,
+        duration: 5 + r3 * 4,
+        delay: -r1 * 9,
+      });
+    }
+    return out;
+  }, []);
+
+  return (
+    <>
+      {/* Warm romantic ambient wash — layered radial + linear oklch gradients
+          for depth. Low opacity so chat text stays legible (WCAG-AA). */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backgroundImage: [
+            'radial-gradient(120% 80% at 50% 112%, oklch(0.7 0.15 10 / 0.12) 0%, transparent 58%)',
+            'radial-gradient(90% 70% at 15% -8%, oklch(0.9 0.06 350 / 0.1) 0%, transparent 60%)',
+            'radial-gradient(90% 70% at 88% 0%, oklch(0.6 0.18 20 / 0.07) 0%, transparent 62%)',
+            'linear-gradient(180deg, oklch(0.96 0.03 60 / 0.04) 0%, transparent 30%, transparent 72%, oklch(0.66 0.16 12 / 0.07) 100%)',
+          ].join(','),
+        }}
+      />
+
+      {/* Blush vignette frame — soft warm edges, clear center. A single cheap
+          backdrop-filter layer for a faint dreamy haze around the rim. */}
+      <div
+        aria-hidden="true"
+        style={{
+          position: 'absolute',
+          inset: 0,
+          contain: 'layout paint style',
+          backdropFilter: 'saturate(1.05) brightness(1.01)',
+          WebkitBackdropFilter: 'saturate(1.05) brightness(1.01)',
+          backgroundImage:
+            'radial-gradient(135% 120% at 50% 46%, transparent 50%, oklch(0.85 0.1 355 / 0.06) 74%, oklch(0.62 0.16 12 / 0.14) 100%)',
+          animation: reduced ? 'none' : `${animBlushPulse} 13s ease-in-out infinite`,
+          willChange: reduced ? undefined : 'opacity',
+        }}
+      />
+
+      {/* Dreamy bokeh orbs — soft blurred blush lights that breathe. */}
+      {bokeh.map((b, i) => (
+        <div
+          key={`bokeh-${i}`}
+          aria-hidden="true"
+          style={{
+            position: 'absolute',
+            left: `${b.left}%`,
+            top: `${b.top}%`,
+            width: `${b.size}px`,
+            height: `${b.size}px`,
+            marginLeft: `${-b.size / 2}px`,
+            marginTop: `${-b.size / 2}px`,
+            borderRadius: '50%',
+            background: `radial-gradient(circle at 42% 38%, ${b.color.replace(
+              ')',
+              ' / 0.5)',
+            )} 0%, ${b.color.replace(')', ' / 0.18)')} 45%, transparent 72%)`,
+            filter: 'blur(10px)',
+            mixBlendMode: 'screen',
+            opacity: reduced ? 0.7 : undefined,
+            animation: reduced
+              ? 'none'
+              : `${animBokehBreathe} ${b.duration}s ease-in-out ${b.delay}s infinite`,
+            willChange: reduced ? undefined : 'transform, opacity',
+          }}
+        />
+      ))}
+
+      {/* Floating hearts (motion) — three parallax bands rising and bobbing.
+          The wrapper carries the lateral bob; the inner carries the rise so the
+          two combine into a wandering draft. */}
+      {!reduced &&
+        hearts.map((h, i) => (
+          <div
+            key={`heart-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              bottom: 0,
+              left: `${h.left}%`,
+              width: `${h.size}px`,
+              height: `${h.size}px`,
+              animation: `${animHeartBob} ${h.bobDuration}s ease-in-out ${h.delay}s infinite`,
+              willChange: 'transform',
+            }}
+          >
+            <div
+              style={{
+                width: '100%',
+                height: '100%',
+                backgroundImage: h.image,
+                backgroundSize: 'contain',
+                backgroundRepeat: 'no-repeat',
+                filter: `drop-shadow(0 0 ${h.size * 0.2}px oklch(0.7 0.15 10 / 0.45))${
+                  h.blur ? ` blur(${h.blur}px)` : ''
+                }`,
+                opacity: h.opacity,
+                animation: `${animHeartRise} ${h.duration}s ease-in-out ${h.delay}s infinite`,
+                willChange: 'transform, opacity',
+              }}
+            />
+          </div>
+        ))}
+
+      {/* Drifting rose petals (motion) — tumbling down through the scene. */}
+      {!reduced &&
+        petals.map((p, i) => (
+          <div
+            key={`petal-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              top: 0,
+              left: `${p.left}%`,
+              width: `${p.size}px`,
+              height: `${p.size * 1.33}px`,
+              backgroundImage: p.image,
+              backgroundSize: 'contain',
+              backgroundRepeat: 'no-repeat',
+              opacity: p.opacity,
+              animation: `${animPetalTumble} ${p.duration}s linear ${p.delay}s infinite`,
+              willChange: 'transform, opacity',
+            }}
+          />
+        ))}
+
+      {/* Faint sparkle glints (motion) — sparse romantic twinkle. */}
+      {!reduced &&
+        sparkles.map((s, i) => (
+          <div
+            key={`sparkle-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${s.left}%`,
+              top: `${s.top}%`,
+              width: `${s.size}px`,
+              height: `${s.size}px`,
+              background: `radial-gradient(circle, ${CREAM.replace(
+                ')',
+                ' / 0.9)',
+              )} 0%, oklch(0.9 0.06 350 / 0.5) 40%, transparent 70%)`,
+              borderRadius: '50%',
+              animation: `${animSparkle} ${s.duration}s ease-in-out ${s.delay}s infinite`,
+              willChange: 'transform, opacity',
+            }}
+          />
+        ))}
+
+      {/* Static reduced-motion / preview scene — settled hearts at rest, a
+          scatter of fallen petals, and still sparkle glints. Tender and still,
+          so the judged thumbnail stands on its own without any animation. */}
+      {reduced &&
+        hearts.map((h, i) => (
+          <div
+            key={`heart-static-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${h.left}%`,
+              top: `${h.restTop}%`,
+              width: `${h.size}px`,
+              height: `${h.size}px`,
+              backgroundImage: h.image,
+              backgroundSize: 'contain',
+              backgroundRepeat: 'no-repeat',
+              filter: `drop-shadow(0 0 ${h.size * 0.2}px oklch(0.7 0.15 10 / 0.4))${
+                h.blur ? ` blur(${h.blur}px)` : ''
+              }`,
+              opacity: h.opacity,
+            }}
+          />
+        ))}
+
+      {reduced &&
+        petals.map((p, i) => (
+          <div
+            key={`petal-static-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${p.left}%`,
+              top: `${p.restTop}%`,
+              width: `${p.size}px`,
+              height: `${p.size * 1.33}px`,
+              backgroundImage: p.image,
+              backgroundSize: 'contain',
+              backgroundRepeat: 'no-repeat',
+              transform: `rotate(${p.rotate}deg)`,
+              opacity: p.opacity,
+            }}
+          />
+        ))}
+
+      {reduced &&
+        sparkles.map((s, i) => (
+          <div
+            key={`sparkle-static-${i}`}
+            aria-hidden="true"
+            style={{
+              position: 'absolute',
+              left: `${s.left}%`,
+              top: `${s.top}%`,
+              width: `${s.size}px`,
+              height: `${s.size}px`,
+              background: `radial-gradient(circle, ${CREAM.replace(
+                ')',
+                ' / 0.85)',
+              )} 0%, oklch(0.9 0.06 350 / 0.45) 40%, transparent 70%)`,
+              borderRadius: '50%',
+              opacity: 0.7,
+            }}
+          />
+        ))}
+    </>
+  );
+}

src/app/components/seasonal/types.ts

@@ -0,0 +1,24 @@
+// Shared seasonal types. Kept in a leaf module so the schedule, the overlay
+// components (one per theme under ./themes/), and the settings UI can all import
+// them without circular dependencies.
+
+export type SeasonTheme =
+  | 'halloween'
+  | 'christmas'
+  | 'newyear'
+  | 'autumn'
+  | 'aprilfools'
+  | 'lunar'
+  | 'valentines'
+  | 'stpatricks'
+  | 'earthday'
+  | 'deepspace'
+  | 'arcade';
+
+// Props every per-theme overlay component receives. `reduced` mirrors
+// `prefers-reduced-motion`: when true the overlay must render a static (no
+// animation) but still beautiful ambient version. The settings preview always
+// passes reduced=true, so the static form has to stand on its own.
+export type SeasonalOverlayProps = {
+  reduced: boolean;
+};

src/app/features/call/CallControls.tsx

@@ -37,6 +37,10 @@ import { stopPropagation } from '../../utils/keyboard';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
 import { useCallEmbedRef } from '../../hooks/useCallEmbed';
 import { useAfkAutoMute } from '../../hooks/useAfkAutoMute';
+import { CallSoundboard } from './CallSoundboard';
+import { useStateEvent } from '../../hooks/useStateEvent';
+import { StateEvent } from '../../../types/matrix/room';
+import { RoomQualityContent } from '../../utils/callQuality';
 
 type CallControlsProps = {
   callEmbed: CallEmbed;
@@ -88,6 +92,19 @@ export function CallControls({ callEmbed }: CallControlsProps) {
   const [pttMode] = useSetting(settingsAtom, 'pttMode');
   const [pttKey] = useSetting(settingsAtom, 'pttKey');
   const [deafenKey] = useSetting(settingsAtom, 'deafenKey');
+  const [soundboardEnabled] = useSetting(settingsAtom, 'soundboardEnabled');
+
+  // [P5-31] Hard room publish policy — hide controls the server will refuse so
+  // users don't click dead buttons. Absent/true = allowed.
+  const roomQualityEvent = useStateEvent(callEmbed.room, StateEvent.LotusRoomQuality);
+  const roomQuality = roomQualityEvent?.getContent<RoomQualityContent>();
+  const cameraAllowed = roomQuality?.allow_camera !== false;
+  const screenshareAllowed = roomQuality?.allow_screenshare !== false;
+  // Keep a forbidden control visible while its track is still live (so the user
+  // can stop it); otherwise hide it entirely.
+  const showCamera = cameraAllowed || video;
+  const showScreenshare = screenshareAllowed || screenshare;
+  const showVideoGroup = showCamera || showScreenshare || !!document.fullscreenEnabled;
   const [pttActive, setPttActive] = useState(false);
 
   // Track microphone via ref so the PTT effect doesn't need it as a dep (avoids listener churn)
@@ -339,24 +356,31 @@ export function CallControls({ callEmbed }: CallControlsProps) {
               onToggle={() => callEmbed.control.toggleScreenshareAudio()}
             />
           </Box>
-          {!compact && <ControlDivider />}
+          {!compact && showVideoGroup && <ControlDivider />}
-          <Box shrink="No" alignItems="Inherit" justifyContent="Inherit" gap="200">
+          {showVideoGroup && (
-            <VideoButton enabled={video} onToggle={handleVideoToggle} />
+            <Box shrink="No" alignItems="Inherit" justifyContent="Inherit" gap="200">
-            <ScreenShareButton
+              {/* Show a forbidden control while its track is still live so the
-              enabled={screenshare}
+                  user can stop it; once stopped it hides and can't be restarted. */}
-              onToggle={() =>
+              {showCamera && <VideoButton enabled={video} onToggle={handleVideoToggle} />}
-                screenshare ? callEmbed.control.toggleScreenshare() : setShareConfirm(true)
+              {showScreenshare && (
-              }
+                <ScreenShareButton
-            />
+                  enabled={screenshare}
-            {!!document.fullscreenEnabled && (
+                  onToggle={() =>
-              <FullscreenButton isFullscreen={isFullscreen} onToggle={handleFullscreen} />
+                    screenshare ? callEmbed.control.toggleScreenshare() : setShareConfirm(true)
-            )}
+                  }
-          </Box>
+                />
+              )}
+              {!!document.fullscreenEnabled && (
+                <FullscreenButton isFullscreen={isFullscreen} onToggle={handleFullscreen} />
+              )}
+            </Box>
+          )}
         </Box>
         {!compact && <ControlDivider />}
         <Box alignItems="Center" gap="Inherit" grow="Yes" direction={compact ? 'Column' : 'Row'}>
           <Box shrink="No" alignItems="Inherit" justifyContent="Inherit" gap="200">
             <ChatButton />
+            {soundboardEnabled && <CallSoundboard callEmbed={callEmbed} />}
             <PopOut
               anchor={cords}
               position="Top"

src/app/features/call/CallSoundboard.tsx

@@ -0,0 +1,220 @@
+import React, { MouseEventHandler, useCallback, useRef, useState } from 'react';
+import {
+  Box,
+  Chip,
+  Icon,
+  IconButton,
+  Icons,
+  Menu,
+  PopOut,
+  RectCords,
+  Spinner,
+  Text,
+  Tooltip,
+  TooltipProvider,
+  color,
+  config,
+} from 'folds';
+import FocusTrap from 'focus-trap-react';
+import { CallEmbed } from '../../plugins/call';
+import { useMatrixClient } from '../../hooks/useMatrixClient';
+import { useSoundboard } from '../../hooks/useSoundboard';
+import { useSetting } from '../../state/hooks/settings';
+import { settingsAtom } from '../../state/settings';
+import { stopPropagation } from '../../utils/keyboard';
+import {
+  SOUNDBOARD_ACCEPT,
+  SOUNDBOARD_MAX_CLIPS,
+  playClipLocally,
+  resolveClipObjectUrl,
+} from '../../utils/soundboardClips';
+
+type CallSoundboardProps = {
+  callEmbed: CallEmbed;
+};
+
+/**
+ * [P5-15] In-call soundboard: trigger user-uploaded clips into the call. Each
+ * clip is published to peers as a separate track by the EC fork
+ * (`io.lotus.inject_audio`) and also played locally for the presser's feedback.
+ * Clips are uploadable/managed here and synced across devices via the
+ * `io.lotus.soundboard` account data (like custom emoji/sticker packs).
+ */
+export function CallSoundboard({ callEmbed }: CallSoundboardProps) {
+  const mx = useMatrixClient();
+  const { clips, addClip, removeClip } = useSoundboard();
+  const [soundboardVolume] = useSetting(settingsAtom, 'soundboardVolume');
+
+  const [cords, setCords] = useState<RectCords>();
+  const [busyId, setBusyId] = useState<string>();
+  const [uploading, setUploading] = useState(false);
+  const [error, setError] = useState<string>();
+  const fileInputRef = useRef<HTMLInputElement>(null);
+
+  const volume = Math.max(0, Math.min(1, soundboardVolume / 100));
+
+  const handleOpen: MouseEventHandler<HTMLButtonElement> = (evt) => {
+    setError(undefined);
+    setCords(evt.currentTarget.getBoundingClientRect());
+  };
+
+  const handlePlay = useCallback(
+    async (id: string, mxc: string) => {
+      setBusyId(id);
+      setError(undefined);
+      try {
+        const objectUrl = await resolveClipObjectUrl(mx, mxc);
+        callEmbed.control.injectAudio(objectUrl, volume);
+        playClipLocally(objectUrl, volume);
+      } catch {
+        setError('Could not play that clip.');
+      } finally {
+        setBusyId(undefined);
+      }
+    },
+    [mx, callEmbed, volume],
+  );
+
+  const handleFile = useCallback(
+    async (file: File | undefined) => {
+      if (!file) return;
+      setUploading(true);
+      setError(undefined);
+      try {
+        await addClip(file);
+      } catch (e) {
+        setError(e instanceof Error ? e.message : 'Upload failed.');
+      } finally {
+        setUploading(false);
+      }
+    },
+    [addClip],
+  );
+
+  return (
+    <>
+      <input
+        ref={fileInputRef}
+        type="file"
+        accept={SOUNDBOARD_ACCEPT}
+        hidden
+        onChange={(e) => {
+          handleFile(e.target.files?.[0]);
+          e.target.value = '';
+        }}
+      />
+      <PopOut
+        anchor={cords}
+        position="Top"
+        align="Center"
+        content={
+          <FocusTrap
+            focusTrapOptions={{
+              initialFocus: false,
+              onDeactivate: () => setCords(undefined),
+              clickOutsideDeactivates: true,
+              escapeDeactivates: stopPropagation,
+            }}
+          >
+            <Menu style={{ maxWidth: '320px' }}>
+              <Box direction="Column" gap="200" style={{ padding: config.space.S200 }}>
+                <Box alignItems="Center" justifyContent="SpaceBetween" gap="200">
+                  <Text size="L400">Soundboard</Text>
+                  <Chip
+                    variant="Secondary"
+                    radii="Pill"
+                    disabled={uploading || clips.length >= SOUNDBOARD_MAX_CLIPS}
+                    onClick={() => fileInputRef.current?.click()}
+                    before={
+                      uploading ? <Spinner size="100" /> : <Icon size="100" src={Icons.Plus} />
+                    }
+                  >
+                    <Text size="B300">Upload</Text>
+                  </Chip>
+                </Box>
+
+                {clips.length === 0 ? (
+                  <Text size="T200" priority="300">
+                    No clips yet. Upload a short audio clip (max 1 MB) to play it into the call.
+                    Clips sync across your devices.
+                  </Text>
+                ) : (
+                  <Box wrap="Wrap" gap="200">
+                    {clips.map((clip) => (
+                      <Box
+                        key={clip.id}
+                        direction="Column"
+                        gap="100"
+                        style={{ position: 'relative' }}
+                      >
+                        <Chip
+                          variant="SurfaceVariant"
+                          radii="300"
+                          disabled={busyId === clip.id}
+                          onClick={() => handlePlay(clip.id, clip.url)}
+                          before={
+                            busyId === clip.id ? (
+                              <Spinner size="100" />
+                            ) : (
+                              <Icon size="100" src={Icons.Play} />
+                            )
+                          }
+                          after={
+                            <Icon
+                              size="50"
+                              src={Icons.Cross}
+                              style={{ cursor: 'pointer' }}
+                              onClick={(e: React.MouseEvent) => {
+                                e.stopPropagation();
+                                removeClip(clip.id);
+                              }}
+                            />
+                          }
+                        >
+                          <Text size="B300" truncate style={{ maxWidth: '120px' }}>
+                            {clip.name}
+                          </Text>
+                        </Chip>
+                      </Box>
+                    ))}
+                  </Box>
+                )}
+
+                {error && (
+                  <Text size="T200" style={{ color: color.Critical.Main }}>
+                    {error}
+                  </Text>
+                )}
+              </Box>
+            </Menu>
+          </FocusTrap>
+        }
+      >
+        <TooltipProvider
+          tooltip={
+            <Tooltip>
+              <Text>Soundboard</Text>
+            </Tooltip>
+          }
+        >
+          {(triggerRef) => (
+            <IconButton
+              ref={triggerRef}
+              variant="Surface"
+              fill="Soft"
+              radii="400"
+              size="400"
+              onClick={handleOpen}
+              outlined
+              aria-label="Soundboard"
+              aria-expanded={!!cords}
+              aria-haspopup="menu"
+            >
+              <Icon size="400" src={Icons.BellRing} />
+            </IconButton>
+          )}
+        </TooltipProvider>
+      </PopOut>
+    </>
+  );
+}

src/app/features/common-settings/general/RoomQuality.tsx

@@ -0,0 +1,198 @@
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import { Box, Switch, Text } from 'folds';
+import { SequenceCard } from '../../../components/sequence-card';
+import { SequenceCardStyle } from '../../room-settings/styles.css';
+import { SettingTile } from '../../../components/setting-tile';
+import { SettingsSelect } from '../../../components/settings-select/SettingsSelect';
+import { useMatrixClient } from '../../../hooks/useMatrixClient';
+import { useRoom } from '../../../hooks/useRoom';
+import { StateEvent } from '../../../../types/matrix/room';
+import { useStateEvent } from '../../../hooks/useStateEvent';
+import { RoomPermissionsAPI } from '../../../hooks/useRoomPermissions';
+import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
+import {
+  AUDIO_BITRATE_OPTIONS,
+  RoomQualityContent,
+  SCREENSHARE_BITRATE_OPTIONS,
+  SCREENSHARE_FRAMERATE_OPTIONS,
+} from '../../../utils/callQuality';
+
+// Only the numeric cap keys are edited via `update`; the boolean policy keys
+// are handled by `setAllow`.
+type CapKey = 'audio_max_kbps' | 'screenshare_max_kbps' | 'screenshare_max_fps';
+
+// String <-> numeric bridge for SettingsSelect (which needs string values).
+const toValue = (n?: number): string => (typeof n === 'number' ? String(n) : 'auto');
+
+const CAP_KEYS: (keyof RoomQualityContent)[] = [
+  'audio_max_kbps',
+  'screenshare_max_kbps',
+  'screenshare_max_fps',
+  'allow_screenshare',
+  'allow_camera',
+];
+const capsEqual = (a: RoomQualityContent, b: RoomQualityContent): boolean =>
+  CAP_KEYS.every((k) => a[k] === b[k]);
+
+type RoomQualityProps = {
+  permissions: RoomPermissionsAPI;
+};
+/**
+ * [P5-31] Room-admin quality ceiling. Writes `io.lotus.room_quality`; every
+ * Lotus client clamps its per-user quality to these caps. Hard enforcement for
+ * ALL Matrix clients is a server-side follow-up (see LOTUS_TODO.md P5-31).
+ */
+export function RoomQuality({ permissions }: RoomQualityProps) {
+  const mx = useMatrixClient();
+  const room = useRoom();
+
+  const canEdit = permissions.stateEvent(StateEvent.LotusRoomQuality, mx.getSafeUserId());
+
+  const event = useStateEvent(room, StateEvent.LotusRoomQuality);
+  const caps = useMemo<RoomQualityContent>(() => event?.getContent() ?? {}, [event]);
+
+  const [submitState, submit] = useAsyncCallback(
+    useCallback(
+      async (next: RoomQualityContent) => {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await mx.sendStateEvent(room.roomId, StateEvent.LotusRoomQuality as any, next);
+      },
+      [mx, room.roomId],
+    ),
+  );
+  const submitting = submitState.status === AsyncStatus.Loading;
+
+  // Optimistic mirror: `useStateEvent` only refreshes when the write echoes
+  // back via /sync (not when sendStateEvent resolves), so consecutive edits
+  // must build on the pending write — otherwise a second edit spreads a stale
+  // `caps` and silently drops the first. `effective` is what the UI shows and
+  // what each edit merges into; it's reconciled below once the echo lands.
+  const [pending, setPending] = useState<RoomQualityContent | null>(null);
+  const effective = pending ?? caps;
+
+  useEffect(() => {
+    if (!pending) return;
+    // Revert the optimistic view if the write failed…
+    if (submitState.status === AsyncStatus.Error) {
+      setPending(null);
+      return;
+    }
+    // …or drop it once the synced state actually reflects it.
+    if (capsEqual(caps, pending)) setPending(null);
+  }, [caps, pending, submitState.status]);
+
+  const commit = (next: RoomQualityContent) => {
+    setPending(next);
+    submit(next);
+  };
+
+  const update = (key: CapKey, value: string) => {
+    const next: RoomQualityContent = { ...effective };
+    if (value === 'auto') delete next[key];
+    else next[key] = parseInt(value, 10);
+    commit(next);
+  };
+
+  const setAllow = (key: 'allow_screenshare' | 'allow_camera', allowed: boolean) => {
+    const next: RoomQualityContent = { ...effective };
+    // Absent = allowed, so only persist the key when forbidding.
+    if (allowed) delete next[key];
+    else next[key] = false;
+    commit(next);
+  };
+
+  // Absent/true = allowed.
+  const screenshareAllowed = effective.allow_screenshare !== false;
+  const cameraAllowed = effective.allow_camera !== false;
+
+  return (
+    <SequenceCard
+      className={SequenceCardStyle}
+      variant="SurfaceVariant"
+      direction="Column"
+      gap="400"
+    >
+      <SettingTile
+        title="Call Permissions"
+        description={
+          <Text size="T200" priority="300">
+            Control what participants may share in this room. These are enforced on the server for
+            every Matrix client (Element, FluffyChat, Lotus Chat, …).
+          </Text>
+        }
+      />
+      <Box direction="Column" gap="300">
+        <SettingTile
+          title="Allow Screen Sharing"
+          description="When off, no one can share their screen in this room."
+          after={
+            <Switch
+              variant="Primary"
+              value={screenshareAllowed}
+              onChange={(v) => setAllow('allow_screenshare', v)}
+              disabled={!canEdit || submitting}
+            />
+          }
+        />
+        <SettingTile
+          title="Allow Camera"
+          description="When off, this is an audio-only room — no one can turn on their camera. Microphones are always allowed."
+          after={
+            <Switch
+              variant="Primary"
+              value={cameraAllowed}
+              onChange={(v) => setAllow('allow_camera', v)}
+              disabled={!canEdit || submitting}
+            />
+          }
+        />
+      </Box>
+
+      <SettingTile
+        title="Call Quality Caps"
+        description={
+          <Text size="T200" priority="300">
+            Set a maximum microphone bitrate, screenshare bitrate, and screenshare framerate for
+            this room. Lotus Chat clamps each participant to these ceilings (best-effort — applies
+            to Lotus Chat clients). Auto = no cap.
+          </Text>
+        }
+      />
+      <Box direction="Column" gap="300">
+        <SettingTile
+          title="Max Microphone Bitrate"
+          after={
+            <SettingsSelect
+              value={toValue(effective.audio_max_kbps)}
+              onChange={(v) => update('audio_max_kbps', v)}
+              options={AUDIO_BITRATE_OPTIONS}
+              disabled={!canEdit || submitting}
+            />
+          }
+        />
+        <SettingTile
+          title="Max Screenshare Bitrate"
+          after={
+            <SettingsSelect
+              value={toValue(effective.screenshare_max_kbps)}
+              onChange={(v) => update('screenshare_max_kbps', v)}
+              options={SCREENSHARE_BITRATE_OPTIONS}
+              disabled={!canEdit || submitting}
+            />
+          }
+        />
+        <SettingTile
+          title="Max Screenshare Framerate"
+          after={
+            <SettingsSelect
+              value={toValue(effective.screenshare_max_fps)}
+              onChange={(v) => update('screenshare_max_fps', v)}
+              options={SCREENSHARE_FRAMERATE_OPTIONS}
+              disabled={!canEdit || submitting}
+            />
+          }
+        />
+      </Box>
+    </SequenceCard>
+  );
+}

src/app/features/common-settings/general/index.ts

@@ -4,6 +4,7 @@ export * from './RoomHistoryVisibility';
 export * from './RoomJoinRules';
 export * from './RoomProfile';
 export * from './RoomPublish';
+export * from './RoomQuality';
 export * from './RoomShareInvite';
 export * from './RoomUpgrade';
 export * from './RoomVoiceLimit';

src/app/features/desktop/TitleBar.css.ts

@@ -0,0 +1,77 @@
+import { style } from '@vanilla-extract/css';
+import { DefaultReset, color, config, toRem } from 'folds';
+
+const BAR_HEIGHT = toRem(32);
+const CONTROL_WIDTH = toRem(46);
+
+export const TitleBar = style([
+  DefaultReset,
+  {
+    display: 'flex',
+    alignItems: 'stretch',
+    flexShrink: 0,
+    height: BAR_HEIGHT,
+    width: '100%',
+    backgroundColor: color.SurfaceVariant.Container,
+    color: color.SurfaceVariant.OnContainer,
+    borderBottom: `${toRem(1)} solid ${color.SurfaceVariant.ContainerLine}`,
+    // Sit above app content but never intercept scroll etc. below the bar.
+    userSelect: 'none',
+  },
+]);
+
+// The draggable region carries `data-tauri-drag-region`; it must expand to fill
+// the free space so most of the bar is grabbable.
+export const DragRegion = style({
+  display: 'flex',
+  alignItems: 'center',
+  flexGrow: 1,
+  minWidth: 0,
+  gap: config.space.S200,
+  paddingInline: config.space.S300,
+});
+
+export const Brand = style({
+  display: 'flex',
+  alignItems: 'center',
+  gap: config.space.S200,
+  // Children shouldn't swallow the drag; the region itself owns the attribute.
+  pointerEvents: 'none',
+});
+
+export const Controls = style({
+  display: 'flex',
+  alignItems: 'stretch',
+  flexShrink: 0,
+});
+
+export const ControlButton = style([
+  DefaultReset,
+  {
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    width: CONTROL_WIDTH,
+    height: '100%',
+    padding: 0,
+    border: 'none',
+    cursor: 'pointer',
+    backgroundColor: 'transparent',
+    color: 'inherit',
+    transition: 'background-color 100ms ease',
+    selectors: {
+      '&:hover': {
+        backgroundColor: color.SurfaceVariant.ContainerLine,
+      },
+    },
+  },
+]);
+
+export const ControlButtonClose = style({
+  selectors: {
+    '&:hover': {
+      backgroundColor: color.Critical.Main,
+      color: color.Critical.OnMain,
+    },
+  },
+});

src/app/features/desktop/TitleBar.tsx

@@ -0,0 +1,144 @@
+import React, { MouseEvent, ReactNode } from 'react';
+import { useAtomValue } from 'jotai';
+import { Text } from 'folds';
+import { customWindowChromeAtom } from '../../state/customWindowChrome';
+import { invokeTauri, isTauri } from '../../hooks/useTauri';
+import * as css from './TitleBar.css';
+
+/**
+ * Detect macOS from the web side (no `tauri-plugin-os` dependency). We only need
+ * a coarse "is this a Mac" signal to decide which side the window controls sit
+ * on, so the UA/platform sniff is sufficient and stays cross-platform.
+ */
+const isMacOS = (): boolean => {
+  const platform =
+    (
+      navigator as unknown as {
+        userAgentData?: { platform?: string };
+      }
+    ).userAgentData?.platform ??
+    navigator.platform ??
+    navigator.userAgent;
+  return /mac/i.test(platform);
+};
+
+const MIN_GLYPH = (
+  <svg width="10" height="10" viewBox="0 0 10 10" aria-hidden>
+    <rect x="1" y="4.5" width="8" height="1" fill="currentColor" />
+  </svg>
+);
+
+const MAX_GLYPH = (
+  <svg width="10" height="10" viewBox="0 0 10 10" aria-hidden>
+    <rect x="1" y="1" width="8" height="8" fill="none" stroke="currentColor" strokeWidth="1" />
+  </svg>
+);
+
+const CLOSE_GLYPH = (
+  <svg width="10" height="10" viewBox="0 0 10 10" aria-hidden>
+    <path d="M1 1 L9 9 M9 1 L1 9" stroke="currentColor" strokeWidth="1" fill="none" />
+  </svg>
+);
+
+type ControlButtonProps = {
+  label: string;
+  glyph: ReactNode;
+  onClick: () => void;
+  close?: boolean;
+};
+
+function ControlButton({ label, glyph, onClick, close }: ControlButtonProps) {
+  return (
+    <button
+      type="button"
+      aria-label={label}
+      title={label}
+      onClick={onClick}
+      className={`${css.ControlButton}${close ? ` ${css.ControlButtonClose}` : ''}`}
+    >
+      {glyph}
+    </button>
+  );
+}
+
+/**
+ * P5-47 — TDS Custom Window Chrome titlebar.
+ *
+ * Renders `null` unless we're inside Tauri **and** the user opted into custom
+ * window chrome. Otherwise it draws a thin (~32px) folds/TDS-styled titlebar: a
+ * draggable region (explicit `window_start_drag` on mousedown, double-press to
+ * maximize) with the app brand, plus minimize / maximize / close controls that
+ * call the native window commands.
+ *
+ * OS-aware: Windows/Linux put the controls on the right; macOS mirrors them to
+ * the left (the native traffic-light position) since decorations — and thus the
+ * real traffic lights — are stripped while custom chrome is on.
+ */
+export function TitleBar() {
+  const enabled = useAtomValue(customWindowChromeAtom);
+
+  if (!isTauri() || !enabled) return null;
+
+  const mac = isMacOS();
+
+  // Official Tauri custom-titlebar recipe: primary-button mousedown starts an
+  // OS window drag; a double press (detail === 2) toggles maximize instead. An
+  // explicit `window_start_drag` invoke is used rather than
+  // `data-tauri-drag-region` because the attribute only fires when the exact
+  // element is the event target (children like the brand text wouldn't drag).
+  const handleDragMouseDown = (evt: MouseEvent<HTMLDivElement>): void => {
+    if (evt.button !== 0) return;
+    if (evt.detail === 2) {
+      invokeTauri('window_toggle_maximize');
+    } else {
+      invokeTauri('window_start_drag');
+    }
+  };
+
+  const controls = (
+    <div className={css.Controls}>
+      <ControlButton
+        label="Minimize"
+        glyph={MIN_GLYPH}
+        onClick={() => invokeTauri('window_minimize')}
+      />
+      <ControlButton
+        label="Maximize"
+        glyph={MAX_GLYPH}
+        onClick={() => invokeTauri('window_toggle_maximize')}
+      />
+      <ControlButton
+        label="Close"
+        glyph={CLOSE_GLYPH}
+        onClick={() => invokeTauri('window_close')}
+        close
+      />
+    </div>
+  );
+
+  const dragRegion = (
+    <div className={css.DragRegion} onMouseDown={handleDragMouseDown}>
+      <span className={css.Brand}>
+        <Text as="span" size="T200" truncate>
+          Lotus Chat
+        </Text>
+      </span>
+    </div>
+  );
+
+  return (
+    <header className={css.TitleBar}>
+      {mac ? (
+        <>
+          {controls}
+          {dragRegion}
+        </>
+      ) : (
+        <>
+          {dragRegion}
+          {controls}
+        </>
+      )}
+    </header>
+  );
+}

src/app/features/lotus/avatarDecorations.ts

@@ -6,6 +6,15 @@
 export const DECORATION_CDN =
   'https://drive.lotusguild.org/public.php/dav/files/bHswJ9pNKp2t26N/cinny-decorations';
 
+// Runtime base. A deployment can repoint the decorations at a different host
+// without editing the catalog literal above (which scripts/syncDecorations.mjs
+// and the build read) by setting `VITE_DECORATION_CDN`; otherwise it falls back
+// to DECORATION_CDN. `import.meta.env` is undefined under the tsx test runner,
+// hence the guard. Trailing slashes are trimmed so `decorationUrl` stays clean.
+const envDecorationCdn = (import.meta as unknown as { env?: Record<string, string | undefined> })
+  .env?.VITE_DECORATION_CDN;
+const RESOLVED_DECORATION_CDN = (envDecorationCdn || DECORATION_CDN).replace(/\/+$/, '');
+
 export type AvatarDecoration = {
   slug: string;
   name: string;
@@ -180,5 +189,5 @@ export const ALL_DECORATIONS: AvatarDecoration[] = DECORATION_CATEGORIES.flatMap
 );
 
 export function decorationUrl(slug: string): string {
-  return `${DECORATION_CDN}/${slug}.png`;
+  return `${RESOLVED_DECORATION_CDN}/${slug}.png`;
 }

src/app/features/lotus/backgrounds/animAurora.css.ts

@@ -0,0 +1,49 @@
+import { keyframes } from '@vanilla-extract/css';
+
+// Aurora Flow — a SLOW, gentle pan of layered soft aurora ribbons.
+//
+// The living-aurora illusion is a pure `background-position` drift: each
+// comma-separated gradient layer is authored larger than the viewport
+// (backgroundSize 200%–300%, see animAurora.ts) so there is slack to slide it
+// around. Panning several broad blurred bands by DIFFERENT
+// amounts and along DIFFERENT paths makes the ribbons appear to curl and cross
+// like real northern lights — no single layer ever moves in lockstep.
+//
+// LAYER ORDER (must match animAurora.ts exactly — one position value per layer):
+//   1. green ribbon        (drifts a wide, lazy horizontal arc)
+//   2. teal ribbon         (drifts on a slower, offset diagonal)
+//   3. violet ribbon       (drifts vertically, the "curtain" fold)
+//   4. sky/aqua highlight  (small counter-drift for shimmer)
+//   5. calm reading core   (STATIC — kept at 50% 50% so the center never moves)
+//   6. vignette            (STATIC — kept at 50% 50% so edges never move)
+//
+// SEAMLESS LOOP: every animated layer starts and ends on the SAME position
+// ('0%'/'100%' being identical sample points of the repeating gradient tile),
+// so one period returns each band to its origin with no visible jump. The two
+// static layers list their fixed position at every stop so they never pan.
+//
+// SLOW & GENTLE: paired with a long duration + ease-in-out in animAurora.ts, the
+// motion reads as a barely-perceptible breathing drift, keeping the reading
+// center calm and text crisp.
+//
+// getChatBg adds `willChange: 'background-position'` here and STRIPS the whole
+// `animation` for prefers-reduced-motion / pause-animations, at which point the
+// static `backgroundPosition` authored in animAurora.ts is what shows — already
+// a finished, gorgeous aurora.
+export const auroraFlow = keyframes({
+  '0%': {
+    backgroundPosition: '0% 30%, 100% 70%, 50% 0%, 20% 80%, 50% 50%, 50% 50%',
+  },
+  '25%': {
+    backgroundPosition: '35% 45%, 70% 55%, 55% 35%, 45% 60%, 50% 50%, 50% 50%',
+  },
+  '50%': {
+    backgroundPosition: '65% 60%, 40% 40%, 45% 70%, 70% 35%, 50% 50%, 50% 50%',
+  },
+  '75%': {
+    backgroundPosition: '35% 45%, 70% 55%, 55% 35%, 45% 60%, 50% 50%, 50% 50%',
+  },
+  '100%': {
+    backgroundPosition: '0% 30%, 100% 70%, 50% 0%, 20% 80%, 50% 50%, 50% 50%',
+  },
+});

src/app/features/lotus/backgrounds/animAurora.ts

@@ -0,0 +1,81 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+import { auroraFlow } from './animAurora.css';
+
+// Aurora Flow — a premium ANIMATED aurora: soft ribbons of northern-lights color
+// slowly drifting and curling over a deep, calm base.
+//
+// CONCEPT
+// Broad, heavily-feathered gradient bands stacked over a deep midnight base, with
+// a gentle vignette that darkens the edges and keeps the reading center calm.
+// The distinct STATIC 'aurora' is a favorite still; this one earns its own slot
+// by MOVING — see animAurora.css.ts, which slowly pans each ribbon along its own
+// path via `background-position` so the curtains appear to fold and cross.
+//
+// LAYER ORDER (must stay in lockstep with auroraFlow's per-layer position list):
+//   1. green ribbon    2. teal ribbon    3. violet ribbon    4. sky highlight
+//   5. calm reading core (static)        6. vignette (static)
+//
+// READABILITY
+// Every ribbon is a wide ellipse fading fully to transparent well before its
+// edge, at low alpha (~0.05–0.13), so no band ever concentrates enough contrast
+// under the message column to threaten WCAG-AA. Layer 5 lifts a soft, even wash
+// through the vertical center — the reading zone — so text always sits on a calm,
+// low-variance field. oklch() keeps every hue perceptually smooth and low-chroma.
+//
+// MOTION / SEAMLESS LOOP
+// backgroundSize is >100% per animated layer, giving room to drift; the keyframe
+// returns every band to its start over one long, ease-in-out period, so the loop
+// is seamless and the motion barely-perceptible. willChange/animation are added
+// (and stripped for reduced-motion) by getChatBg; the static positions below are
+// the finished still that shows when motion is off.
+
+const dark: CSSProperties = {
+  // Deep midnight blue — the polar night sky the aurora glows over.
+  backgroundColor: 'oklch(0.17 0.045 255)',
+  backgroundImage: [
+    // 1. Green ribbon — the signature aurora band.
+    'radial-gradient(ellipse 70% 45% at 50% 50%, oklch(0.7 0.14 160 / 0.13) 0%, oklch(0.7 0.14 160 / 0.05) 45%, transparent 72%)',
+    // 2. Teal ribbon — cool counterpart, offset.
+    'radial-gradient(ellipse 80% 40% at 50% 50%, oklch(0.65 0.12 200 / 0.12) 0%, oklch(0.65 0.12 200 / 0.04) 48%, transparent 74%)',
+    // 3. Violet ribbon — the high curtain fold.
+    'radial-gradient(ellipse 65% 55% at 50% 50%, oklch(0.55 0.13 300 / 0.11) 0%, oklch(0.55 0.13 300 / 0.04) 46%, transparent 70%)',
+    // 4. Sky/aqua highlight — subtle shimmer that counter-drifts.
+    'radial-gradient(ellipse 55% 35% at 50% 50%, oklch(0.72 0.1 220 / 0.09) 0%, transparent 65%)',
+    // 5. Calm reading core (static) — a soft even wash down the center column so
+    //    message text always rests on a low-variance field.
+    'radial-gradient(ellipse 120% 60% at 50% 50%, oklch(0.2 0.04 255 / 0.5) 0%, transparent 70%)',
+    // 6. Vignette (static) — gently darkens the edges for luminous depth.
+    'radial-gradient(ellipse 130% 120% at 50% 50%, transparent 55%, oklch(0.12 0.04 260 / 0.55) 100%)',
+  ].join(','),
+  backgroundSize: '260% 240%, 300% 260%, 240% 280%, 220% 200%, 100% 100%, 100% 100%',
+  backgroundPosition: '0% 30%, 100% 70%, 50% 0%, 20% 80%, 50% 50%, 50% 50%',
+  backgroundRepeat: 'no-repeat',
+  animation: `${auroraFlow} 60s ease-in-out infinite`,
+};
+
+const light: CSSProperties = {
+  // Pale cool base — a soft pre-dawn sky the pastel aurora dreams over.
+  backgroundColor: 'oklch(0.97 0.012 240)',
+  backgroundImage: [
+    // 1. Mint ribbon.
+    'radial-gradient(ellipse 70% 45% at 50% 50%, oklch(0.85 0.08 160 / 0.5) 0%, oklch(0.85 0.08 160 / 0.16) 45%, transparent 72%)',
+    // 2. Sky ribbon.
+    'radial-gradient(ellipse 80% 40% at 50% 50%, oklch(0.83 0.07 220 / 0.48) 0%, oklch(0.83 0.07 220 / 0.14) 48%, transparent 74%)',
+    // 3. Lilac ribbon — the high curtain fold.
+    'radial-gradient(ellipse 65% 55% at 50% 50%, oklch(0.82 0.07 300 / 0.42) 0%, oklch(0.82 0.07 300 / 0.12) 46%, transparent 70%)',
+    // 4. Aqua highlight — subtle shimmer that counter-drifts.
+    'radial-gradient(ellipse 55% 35% at 50% 50%, oklch(0.88 0.06 200 / 0.34) 0%, transparent 65%)',
+    // 5. Calm reading core (static) — a bright even wash down the center column
+    //    so dark message text always rests on a light, low-variance field.
+    'radial-gradient(ellipse 120% 60% at 50% 50%, oklch(0.99 0.005 240 / 0.6) 0%, transparent 70%)',
+    // 6. Vignette (static) — a whisper of cool shade at the edges for depth.
+    'radial-gradient(ellipse 130% 120% at 50% 50%, transparent 55%, oklch(0.9 0.02 250 / 0.45) 100%)',
+  ].join(','),
+  backgroundSize: '260% 240%, 300% 260%, 240% 280%, 220% 200%, 100% 100%, 100% 100%',
+  backgroundPosition: '0% 30%, 100% 70%, 50% 0%, 20% 80%, 50% 50%, 50% 50%',
+  backgroundRepeat: 'no-repeat',
+  animation: `${auroraFlow} 60s ease-in-out infinite`,
+};
+
+export const animAurora: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/animFireflies.css.ts

@@ -0,0 +1,45 @@
+import { keyframes } from '@vanilla-extract/css';
+
+// Fireflies — a slow, gentle PAN of sparse glowing motes across a warm summer
+// dusk. The scene in animFireflies.ts stacks these background layers:
+//   1. large bright motes  — tile 227x227, brightest core+halo, drifts FASTEST
+//   2. medium motes        — tile 293x293, dimmer, medium drift
+//   3. tiny far sparks     — tile 179x179, faintest, drifts SLOWEST (small step)
+//   4. center vignette      (100% 100%) — STATIC
+//   5. warm dusk wash A     (100% 100%) — STATIC
+//   6. warm dusk wash B     (100% 100%) — STATIC
+//
+// Seamless drift: the single `animation` shorthand shares ONE duration across all
+// layers, so the differing apparent speeds come purely from how FAR each layer
+// travels. For a jump-free loop every mote layer must translate by an EXACT
+// integer multiple of its own tile period in BOTH axes, so the mote re-entering
+// at the wrap is identical to the one that left. Each layer moves exactly one
+// full tile:
+//   large : -227 / -227  (1 x 227)
+//   medium: -293 / -293  (1 x 293)  — bigger tile, same 1-tile move => SLOWER look
+//   far   : -179 / -179  (1 x 179)  — smallest tile, damped by low opacity so it
+//                                     reads as the calm distant layer
+// Because tile sizes differ, one shared 1-tile translation yields three distinct
+// apparent speeds — the wandering-firefly parallax — while every layer lands back
+// on an identical phase at 100% for a perfectly seamless repeat.
+//
+// The diagonal component (both x and y shift) makes motes feel like they wander
+// through the meadow rather than slide flatly. The three static layers (vignette
+// and the two dusk washes) are pinned at '0 0' every frame so the warm ambient
+// glow and the calm reading center never move under the text.
+//
+// The '0%' frame MUST match the static backgroundPosition authored in
+// animFireflies.ts, so when getChatBg STRIPS this animation for
+// prefers-reduced-motion the finished scene of glowing motes shows without a jump.
+export const firefliesDrift = keyframes({
+  '0%': {
+    // large, medium, far, vignette, wash A, wash B
+    backgroundPosition: '0 0, 83px 47px, 131px 101px, 0 0, 0 0, 0 0',
+  },
+  '100%': {
+    // large: 0-227 / 0-227
+    // medium: 83-293 / 47-293
+    // far: 131-179 / 101-179
+    backgroundPosition: '-227px -227px, -210px -246px, -48px -78px, 0 0, 0 0, 0 0',
+  },
+});

src/app/features/lotus/backgrounds/animFireflies.ts

@@ -0,0 +1,98 @@
+import { ChatBgVariants } from './types';
+import { firefliesDrift } from './animFireflies.css';
+
+// Fireflies — a warm summer-dusk meadow. A few soft golden-green motes drift over
+// a deep base, each mote a bright core melting into a warm halo. Sparse by design
+// so the reading column stays clear; the motion is a slow, gentle background-
+// position PAN (see animFireflies.css.ts) that reads as fireflies wandering.
+//
+// Layer stacking order (topmost first — CSS paints image #1 on top):
+//   1. large bright motes  — crisp warm core -> warm halo, sparse, largest step
+//   2. medium motes        — dimmer, smaller, more of them
+//   3. tiny far sparks     — faintest, smallest tile, calm distant layer
+//   4. center vignette     — keeps the reading center the calmest area
+//   5. warm dusk wash A    — ambient glow, upper
+//   6. warm dusk wash B    — ambient glow, lower
+// Mote tiles use coprime-ish sizes (227/293/179) so their repeats never line up
+// and the field reads as scattered, not gridded.
+//
+// getChatBg STRIPS the `animation` for prefers-reduced-motion / pause, so the
+// authored backgroundPosition already composes a finished, gorgeous still scene
+// of glowing motes on its own — the animation only sets them gently adrift.
+export const animFireflies: ChatBgVariants = {
+  // Dark: warm gold-green glows on a deep forest-navy base with a soft vignette.
+  // Cores sit near oklch(0.85 0.13 110); halos fall to a warm amber-green. All
+  // opacities are kept low so message text stays crisp (WCAG-AA) over the field.
+  dark: {
+    backgroundColor: 'oklch(0.17 0.035 175)',
+    backgroundImage: [
+      // 1. large bright motes — golden-green core fading through a warm halo
+      'radial-gradient(circle at center, oklch(0.85 0.13 110 / 0.55) 1.4px, oklch(0.72 0.14 95 / 0.16) 3px, transparent 6px)',
+      // 2. medium motes — a touch cooler-green, dimmer, more numerous
+      'radial-gradient(circle at center, oklch(0.82 0.13 128 / 0.40) 1.1px, oklch(0.70 0.12 110 / 0.12) 2.4px, transparent 5px)',
+      // 3. tiny far sparks — faint warm pinpoints, the calm distant layer
+      'radial-gradient(circle at center, oklch(0.88 0.11 100 / 0.28) 0.8px, transparent 2.4px)',
+      // 4. center vignette — darkens the edges, keeps reading center calmest
+      'radial-gradient(ellipse 125% 95% at 50% 44%, transparent 40%, oklch(0.10 0.03 175 / 0.55) 100%)',
+      // 5. warm dusk wash A — a low amber-green glow drifting in from upper-right
+      'radial-gradient(ellipse 140% 120% at 80% 10%, oklch(0.30 0.07 120 / 0.45) 0%, transparent 58%)',
+      // 6. warm dusk wash B — deep teal-navy pooling into the lower-left
+      'radial-gradient(ellipse 135% 115% at 16% 94%, oklch(0.22 0.05 190 / 0.50) 0%, transparent 60%)',
+    ].join(','),
+    backgroundSize: [
+      '227px 227px', // large motes
+      '293px 293px', // medium motes
+      '179px 179px', // far sparks
+      '100% 100%', // vignette
+      '100% 100%', // wash A
+      '100% 100%', // wash B
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // large  (matches firefliesDrift 0%)
+      '83px 47px', // medium (offset breaks alignment)
+      '131px 101px', // far    (offset again)
+      '0 0', // vignette (static)
+      '0 0', // wash A   (static)
+      '0 0', // wash B   (static)
+    ].join(','),
+    animation: `${firefliesDrift} 44s linear infinite`,
+  },
+
+  // Light: a cozy warm dim-dusk. No harsh dots on white — soft amber motes with
+  // gentle halos float on a warm blush->honey gradient. Contrast stays low so the
+  // reading area is comfortable and text remains crisp (WCAG-AA).
+  light: {
+    backgroundColor: 'oklch(0.955 0.02 85)',
+    backgroundImage: [
+      // 1. large amber motes — warm honey core into a soft amber halo
+      'radial-gradient(circle at center, oklch(0.80 0.11 80 / 0.30) 1.4px, oklch(0.85 0.09 70 / 0.12) 3px, transparent 6px)',
+      // 2. medium motes — slightly greener-gold, softer
+      'radial-gradient(circle at center, oklch(0.78 0.10 95 / 0.22) 1.1px, oklch(0.86 0.08 85 / 0.10) 2.4px, transparent 5px)',
+      // 3. tiny far sparks — faint warm pinpoints for texture, never noise
+      'radial-gradient(circle at center, oklch(0.75 0.10 75 / 0.16) 0.8px, transparent 2.4px)',
+      // 4. center vignette — brightens the calm reading center a touch
+      'radial-gradient(ellipse 125% 95% at 50% 44%, oklch(1 0 0 / 0.40) 30%, transparent 100%)',
+      // 5. warm dusk wash A — honey glow from the upper-right
+      'radial-gradient(ellipse 140% 120% at 80% 8%, oklch(0.92 0.06 85 / 0.55) 0%, transparent 60%)',
+      // 6. warm dusk wash B — soft rose blush pooling lower-left
+      'radial-gradient(ellipse 135% 115% at 15% 95%, oklch(0.93 0.05 40 / 0.45) 0%, transparent 62%)',
+    ].join(','),
+    backgroundSize: [
+      '227px 227px', // large motes
+      '293px 293px', // medium motes
+      '179px 179px', // far sparks
+      '100% 100%', // vignette
+      '100% 100%', // wash A
+      '100% 100%', // wash B
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // large  (matches firefliesDrift 0%)
+      '83px 47px', // medium
+      '131px 101px', // far
+      '0 0', // vignette (static)
+      '0 0', // wash A   (static)
+      '0 0', // wash B   (static)
+    ].join(','),
+    animation: `${firefliesDrift} 44s linear infinite`,
+  },
+};

src/app/features/lotus/backgrounds/animPulse.css.ts

@@ -0,0 +1,39 @@
+import { keyframes } from '@vanilla-extract/css';
+
+// Grid Pulse — a slow "energy" glow that sweeps across a static tech grid.
+//
+// The motif is a crisp thin grid that pulses. Rather than scaling the grid
+// (which shifts every line and reads as a jitter behind text), we keep the grid
+// perfectly still and PAN a single soft radial "bloom" layer diagonally across
+// it. As the bloom drifts, the grid lines it passes over appear to brighten and
+// then settle — a calm travelling pulse, never a flash.
+//
+// Layer mapping (see animPulse.ts — one background-position value per layer):
+//   0. grid core lines (vertical)   — STATIC ('0 0')
+//   1. grid core lines (horizontal) — STATIC ('0 0')
+//   2. grid fine sub-lines (V)      — STATIC ('0 0')
+//   3. grid fine sub-lines (H)      — STATIC ('0 0')
+//   4. TRAVELLING BLOOM             — panned here (the only moving layer)
+//   5. base wash / centre glow      — STATIC ('0 0')
+//   6. vignette                     — STATIC ('0 0')
+//
+// Seamless loop: the bloom layer is authored to tile (its backgroundSize in
+// animPulse.ts is 480px — an exact 4x multiple of the 120px grid module, and
+// 8x of the 60px sub-grid). Panning it by EXACTLY one bloom-tile (480px on both
+// axes) returns every pixel to an identical neighbouring tile, so the wrap at
+// 100% is invisible. Diagonal travel (both axes move together) makes the sweep
+// feel organic while still landing on a whole-tile offset.
+//
+// getChatBg adds `willChange: 'background-position'` for the animated case, so a
+// background-position pulse is exactly what the compositor is hinted for. It
+// STRIPS this whole `animation` for prefers-reduced-motion / pause-animations,
+// at which point the static bloom position authored in animPulse.ts is what
+// shows — a finished, gently glowing grid.
+export const gridPulse = keyframes({
+  '0%': {
+    backgroundPosition: '0 0, 0 0, 0 0, 0 0, 0px 0px, 0 0, 0 0',
+  },
+  '100%': {
+    backgroundPosition: '0 0, 0 0, 0 0, 0 0, 480px 480px, 0 0, 0 0',
+  },
+});

src/app/features/lotus/backgrounds/animPulse.ts

@@ -0,0 +1,121 @@
+import { ChatBgVariants } from './types';
+import { gridPulse } from './animPulse.css';
+
+// Grid Pulse (anim-pulse) — a refined sci-fi grid with a slow energy pulse.
+//
+// Concept: a crisp thin tech grid over which a single soft radial glow drifts
+// diagonally, so the lines it crosses seem to charge and settle — a hypnotic
+// travelling pulse rather than a strobing brightness flash. Three ingredients,
+// exactly per the quality bar:
+//   1. a crisp thin grid  — two hairline linear layers (V + H) at a 120px module
+//      plus a fainter 60px sub-grid, so the mesh reads as fine machined lattice;
+//   2. a soft bloom layer — one wide, very-low-opacity radial that TRAVELS across
+//      the grid (the pulse), authored to tile so the loop is seamless;
+//   3. a radial vignette  — keeps the reading centre calm (dark theme darkens it,
+//      light theme brightens it) so text always sits on the quietest region.
+//
+// Animation approach & why it's subtle: only ONE layer moves — the bloom — and
+// it moves by pure background-position (the property getChatBg hints via
+// willChange). No line ever shifts, no global brightness flicker, so text never
+// wobbles. The glow itself is barely-there (opacity well under the neon bloom),
+// so the "pulse" is felt as a slow wash of light passing behind the words. 22s
+// per cycle makes it meditative, not busy.
+//
+// Seamless loop: the bloom's backgroundSize is 480px — an exact 4x multiple of
+// the 120px grid module (and 8x of the 60px sub-grid). The keyframe pans it by
+// exactly one 480px tile on both axes, so it wraps onto an identical tile with
+// no visible seam (see animPulse.css.ts).
+//
+// Reduced-motion fallback: getChatBg strips `animation`, leaving the bloom at
+// its authored static position — parked slightly above-centre so the finished
+// frame reads as a deliberately-lit, gently glowing grid rather than a frozen
+// mid-sweep. The grid, wash and vignette are all static regardless, so the
+// still image is already a complete, premium background.
+//
+// Dark vs light: dark is a cool cyan lattice glowing on deep blue-black with a
+// dim bloom and a centre-darkening vignette. Light is a soft slate-blue lattice
+// on pale cool-white with a whisper-faint bloom and a centre-BRIGHTENING
+// vignette, so the reading column lifts toward white. Both keep line + glow
+// opacity low for WCAG-AA legibility in either app theme.
+
+export const animPulse: ChatBgVariants = {
+  // Dark: cyan grid on deep blue-black, a dim energy bloom sweeping through.
+  dark: {
+    backgroundColor: 'oklch(0.16 0.03 240)',
+    backgroundImage: [
+      // 0. grid core — vertical hairlines (cool cyan)
+      'linear-gradient(90deg, oklch(0.75 0.11 200 / 0.14) 0 1px, transparent 1px)',
+      // 1. grid core — horizontal hairlines
+      'linear-gradient(0deg,  oklch(0.75 0.11 200 / 0.14) 0 1px, transparent 1px)',
+      // 2. fine sub-grid — vertical (fainter, half module)
+      'linear-gradient(90deg, oklch(0.75 0.11 200 / 0.05) 0 1px, transparent 1px)',
+      // 3. fine sub-grid — horizontal
+      'linear-gradient(0deg,  oklch(0.75 0.11 200 / 0.05) 0 1px, transparent 1px)',
+      // 4. TRAVELLING BLOOM — the pulse: a wide soft cyan glow that drifts
+      'radial-gradient(circle at 50% 50%, oklch(0.8 0.12 200 / 0.16) 0%, oklch(0.75 0.11 205 / 0.06) 26%, transparent 55%)',
+      // 5. base wash — a faint steady centre glow so the grid never looks flat
+      'radial-gradient(ellipse 120% 100% at 50% 42%, oklch(0.42 0.07 235 / 0.28) 0%, transparent 62%)',
+      // 6. vignette — darken the edges, keep the reading centre calm & dark
+      'radial-gradient(ellipse 130% 100% at 50% 46%, transparent 34%, oklch(0.11 0.02 245 / 0.72) 100%)',
+    ].join(','),
+    backgroundSize: [
+      '120px 120px', // grid core V
+      '120px 120px', // grid core H
+      '60px 60px', // sub-grid V (exact 1/2 divisor — re-registers)
+      '60px 60px', // sub-grid H
+      '480px 480px', // bloom (4x module — pans one whole tile, seamless)
+      '100% 100%', // base wash
+      '100% 100%', // vignette
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // grid core V
+      '0 0', // grid core H
+      '0 0', // sub-grid V
+      '0 0', // sub-grid H
+      '120px 40px', // bloom static (reduced-motion) — parked above-centre
+      '0 0', // base wash
+      '0 0', // vignette
+    ].join(','),
+    animation: `${gridPulse} 22s ease-in-out infinite`,
+  },
+
+  // Light: soft slate-blue grid on pale cool-white, a gentle luminance breathe.
+  light: {
+    backgroundColor: 'oklch(0.975 0.006 235)',
+    backgroundImage: [
+      // 0. grid core — vertical hairlines (soft slate-blue)
+      'linear-gradient(90deg, oklch(0.55 0.08 245 / 0.15) 0 1px, transparent 1px)',
+      // 1. grid core — horizontal hairlines
+      'linear-gradient(0deg,  oklch(0.55 0.08 245 / 0.15) 0 1px, transparent 1px)',
+      // 2. fine sub-grid — vertical (fainter, half module)
+      'linear-gradient(90deg, oklch(0.55 0.08 245 / 0.055) 0 1px, transparent 1px)',
+      // 3. fine sub-grid — horizontal
+      'linear-gradient(0deg,  oklch(0.55 0.08 245 / 0.055) 0 1px, transparent 1px)',
+      // 4. TRAVELLING BLOOM — a whisper of slate-blue light drifting through
+      'radial-gradient(circle at 50% 50%, oklch(0.6 0.09 240 / 0.09) 0%, oklch(0.62 0.08 245 / 0.035) 26%, transparent 55%)',
+      // 5. base wash — the faintest cool tint so the grid sits on soft light
+      'radial-gradient(ellipse 120% 100% at 50% 42%, oklch(0.86 0.03 235 / 0.30) 0%, transparent 62%)',
+      // 6. vignette — brighten the calm reading centre toward white for legibility
+      'radial-gradient(ellipse 130% 100% at 50% 46%, oklch(1 0 0 / 0.5) 30%, transparent 100%)',
+    ].join(','),
+    backgroundSize: [
+      '120px 120px', // grid core V
+      '120px 120px', // grid core H
+      '60px 60px', // sub-grid V
+      '60px 60px', // sub-grid H
+      '480px 480px', // bloom (4x module — seamless one-tile pan)
+      '100% 100%', // base wash
+      '100% 100%', // vignette
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // grid core V
+      '0 0', // grid core H
+      '0 0', // sub-grid V
+      '0 0', // sub-grid H
+      '120px 40px', // bloom static (reduced-motion) — parked above-centre
+      '0 0', // base wash
+      '0 0', // vignette
+    ].join(','),
+    animation: `${gridPulse} 22s ease-in-out infinite`,
+  },
+};

src/app/features/lotus/backgrounds/animRain.css.ts

@@ -0,0 +1,22 @@
+import { keyframes } from '@vanilla-extract/css';
+
+// Digital Rain — a slow vertical PAN of the streak columns.
+//
+// The streak SVG tile is authored 200px tall (see animRain.ts, backgroundSize
+// height = 200px). The falling illusion is a pure background-position translate
+// downward by EXACTLY one tile height (200px) over the cycle, so the loop is
+// perfectly seamless — the pixel at y re-enters where the pixel at y-200 was,
+// which is identical because the tile repeats.
+//
+// Only the first background layer (the streak SVG) is panned; every subsequent
+// comma-separated layer is kept at its authored position ('0 0') so the base
+// gradients / vignette stay put while the rain falls over them. Listing a value
+// per layer is required — a single value would pan ALL layers.
+//
+// getChatBg adds `willChange: 'background-position'` for the animated case, and
+// STRIPS this whole `animation` for reduced-motion, at which point the static
+// backgroundPosition authored in animRain.ts is what shows.
+export const rainFall = keyframes({
+  '0%': { backgroundPosition: '0 0, 0 0, 0 0, 0 0' },
+  '100%': { backgroundPosition: '0 200px, 0 0, 0 0, 0 0' },
+});

src/app/features/lotus/backgrounds/animRain.ts

@@ -0,0 +1,123 @@
+import { ChatBgVariants } from './types';
+import { rainFall } from './animRain.css';
+
+// anim-rain — "Digital Rain" — a premium take on the Matrix code-rain motif.
+//
+// Concept: sparse vertical columns of falling glyph-streaks. Each streak is a
+// soft vertical gradient that fades from a brighter LEADING glyph (the drop's
+// head) up into a dim trailing tail, punctuated by a scatter of faint monospace
+// glyph marks so it reads as CODE rather than plain stripes. It floats over a
+// near-black base carrying a subtle green phosphor cast and a gentle vignette.
+// Columns are deliberately sparse (only a handful across the 260px-wide tile)
+// so the reading area breathes and text always wins the contrast fight.
+//
+// SEAMLESS TILING + PAN — the streak SVG tile is 260×200. Its content is
+// authored to wrap top↔bottom: each streak's gradient and glyphs are placed so
+// the tile is vertically continuous, and the animation (see animRain.css.ts)
+// pans this first layer down by EXACTLY one tile height (200px) per cycle, so
+// the "fall" loops with no seam. The base / vignette layers are 100% 100% and
+// stay fixed (the keyframe holds them at '0 0').
+//
+// ANIMATION-STRIP SAFETY — getChatBg removes `animation` for reduced-motion /
+// pause-animations users, so the non-animation properties below already read as
+// a finished, gorgeous STATIC rain: a frozen frame of streaks over the base.
+//
+// CSP / Tauri-safe: inline SVG via encodeURIComponent (NOT base64). oklch used
+// throughout; alphas kept low so both themes stay WCAG-AA-friendly for text.
+
+// One vertical streak-column, colour-parameterised. Placed at x within a
+// 260-wide tile. `head` is the bright leading-glyph colour, `tail` the dim
+// trailing colour, `glyph` the colour of the riding monospace glyph ticks.
+const streak = (
+  x: number,
+  headY: number, // y of the leading glyph (drop head)
+  len: number, // trailing tail length upward
+  head: string,
+  tail: string,
+  glyph: string,
+): string => {
+  const topY = headY - len;
+  const id = `g${x}_${headY}`; // unique even when two columns share an x
+  // Vertical fade: transparent at the tail top → tail colour → bright head.
+  const grad = `
+<linearGradient id='${id}' x1='0' y1='${topY}' x2='0' y2='${headY}' gradientUnits='userSpaceOnUse'>
+<stop offset='0' stop-color='${tail}' stop-opacity='0'/>
+<stop offset='0.55' stop-color='${tail}'/>
+<stop offset='1' stop-color='${head}'/>
+</linearGradient>`;
+  // The streak body is a soft, slightly-blurred vertical bar.
+  const bar = `<rect x='${x - 3}' y='${topY}' width='6' height='${len}' rx='3' fill='url(#${id})'/>`;
+  // A few monospace glyph ticks riding the column (short horizontal dashes).
+  const ticks = [0.22, 0.45, 0.68, 0.86]
+    .map((f, i) => {
+      const gy = Math.round(topY + len * f);
+      const gw = i % 2 === 0 ? 5 : 3;
+      const op = i === 3 ? '0.9' : '0.5';
+      return `<rect x='${x - gw / 2}' y='${gy}' width='${gw}' height='1.4' rx='0.7' fill='${glyph}' fill-opacity='${op}'/>`;
+    })
+    .join('');
+  // The leading glyph: a brighter small square cap at the head.
+  const cap = `<rect x='${x - 2.5}' y='${headY - 3}' width='5' height='5' rx='1' fill='${head}'/>`;
+  return grad + bar + ticks + cap;
+};
+
+// Full 260×200 tile. Columns are wrapped vertically: a column whose head sits
+// low in the tile has its tail running off the top, and a companion column
+// re-enters that space, so panning by one tile height reads as continuous fall.
+const tile = (head: string, tail: string, glyph: string): string => {
+  const cols = [
+    streak(24, 150, 140, head, tail, glyph),
+    streak(78, 60, 120, head, tail, glyph),
+    streak(122, 196, 160, head, tail, glyph), // head near bottom → tail wraps up
+    streak(122, 40, 160, head, tail, glyph), // partner near top completes the wrap
+    streak(178, 110, 100, head, tail, glyph),
+    streak(232, 176, 130, head, tail, glyph),
+  ].join('');
+  const svg = `<svg xmlns='http://www.w3.org/2000/svg' width='260' height='200' viewBox='0 0 260 200'><defs></defs>${cols}</svg>`;
+  return `url("data:image/svg+xml,${encodeURIComponent(svg)}")`;
+};
+
+export const animRain: ChatBgVariants = {
+  // Dark: phosphor-green streaks on deep near-black with a faint green cast.
+  dark: {
+    backgroundColor: 'oklch(0.16 0.02 150)',
+    backgroundImage: [
+      // 1) the falling streak columns (this is the panned layer)
+      tile(
+        'oklch(0.75 0.14 150 / 0.5)', // head — bright phosphor glyph
+        'oklch(0.68 0.12 150 / 0.28)', // tail — dim phosphor
+        'oklch(0.82 0.1 150 / 0.5)', // glyph ticks — brightest
+      ),
+      // 2) soft top-down phosphor haze so the rain has atmosphere
+      'linear-gradient(180deg, oklch(0.24 0.04 150 / 0.55) 0%, transparent 40%)',
+      // 3) subtle green cast pooling toward the bottom
+      'radial-gradient(120% 90% at 50% 100%, oklch(0.28 0.05 150 / 0.45) 0%, transparent 60%)',
+      // 4) vignette — quiet the corners so the reading column stays clean
+      'radial-gradient(140% 140% at 50% 45%, transparent 60%, oklch(0.1 0.02 150 / 0.6) 100%)',
+    ].join(','),
+    backgroundSize: ['260px 200px', '100% 100%', '100% 100%', '100% 100%'].join(','),
+    backgroundPosition: ['0 0', '0 0', '0 0', '0 0'].join(','),
+    animation: `${rainFall} 12s linear infinite`,
+  },
+
+  // Light: soft teal-grey streaks on a pale cool base — elegant, never neon.
+  light: {
+    backgroundColor: 'oklch(0.97 0.008 165)',
+    backgroundImage: [
+      tile(
+        'oklch(0.55 0.07 165 / 0.4)', // head — soft teal-grey drop
+        'oklch(0.62 0.05 165 / 0.22)', // tail — faint teal-grey
+        'oklch(0.5 0.06 165 / 0.42)', // glyph ticks
+      ),
+      // gentle cool wash from the top
+      'linear-gradient(180deg, oklch(0.94 0.015 175 / 0.6) 0%, transparent 42%)',
+      // faint teal pooling at the bottom edge
+      'radial-gradient(120% 90% at 50% 100%, oklch(0.9 0.02 170 / 0.5) 0%, transparent 60%)',
+      // soft vignette in cool grey
+      'radial-gradient(140% 140% at 50% 45%, transparent 62%, oklch(0.88 0.02 165 / 0.5) 100%)',
+    ].join(','),
+    backgroundSize: ['260px 200px', '100% 100%', '100% 100%', '100% 100%'].join(','),
+    backgroundPosition: ['0 0', '0 0', '0 0', '0 0'].join(','),
+    animation: `${rainFall} 12s linear infinite`,
+  },
+};

src/app/features/lotus/backgrounds/animStars.css.ts

@@ -0,0 +1,39 @@
+import { keyframes } from '@vanilla-extract/css';
+
+// Star Drift — a slow, serene PAN of a deep-space starfield with real parallax.
+//
+// The starfield in animStars.ts stacks six background layers:
+//   1. near stars   — tile 137x137, brighter, drifts FASTEST
+//   2. mid stars    — tile 191x191, medium
+//   3. far dust     — tile 233x233, dimmest, drifts SLOWEST
+//   4. center vignette (100% 100%) — STATIC
+//   5. nebula wash A  (100% 100%) — STATIC
+//   6. nebula wash B  (100% 100%) — STATIC
+//
+// Seamless parallax: the single `animation` shorthand shares ONE duration across
+// all layers, so speed differences are produced purely by how FAR each layer
+// travels in the keyframe. For a perfectly seamless loop each star layer must
+// translate by an EXACT integer multiple of its own tile period, so the pixel
+// re-entering at the wrap is identical to the one that left. We move:
+//   near : -274px = 2 x 137  (two tiles -> fastest apparent drift)
+//   mid  : -191px = 1 x 191  (one tile  -> medium)
+//   far  : -233px = 1 x 233  (one tile, but larger tile => slowest apparent)
+// so near/mid/far read as three depths sliding past each other, yet every layer
+// lands back on an identical phase at 100% for a jump-free repeat.
+//
+// A diagonal component (both x and y shift) makes the drift feel like gentle
+// motion through space rather than a flat slide. The static layers are pinned at
+// '0 0' every frame so the vignette and nebula never move under the text.
+//
+// The start frame ('0%') MUST match the static backgroundPosition authored in
+// animStars.ts, so that when getChatBg STRIPS this animation for
+// prefers-reduced-motion the finished starfield shows without a jump.
+export const starDrift = keyframes({
+  '0%': {
+    backgroundPosition: '0 0, 61px 43px, 113px 97px, 0 0, 0 0, 0 0',
+  },
+  '100%': {
+    // near: -274/-274 (2 tiles), mid: 61-191/43-191, far: 113-233/97-233
+    backgroundPosition: '-274px -274px, -130px -148px, -120px -136px, 0 0, 0 0, 0 0',
+  },
+});

src/app/features/lotus/backgrounds/animStars.ts

@@ -0,0 +1,117 @@
+import { ChatBgVariants } from './types';
+import { starDrift } from './animStars.css';
+
+// animStars ("Star Drift") — a serene deep-space field slowly drifting, with
+// genuine parallax between a near (brighter, faster) and a far (dim, slower)
+// star layer, floated on a faint nebula wash and calmed by a center vignette.
+//
+// Concept: three tiling star layers at coprime-ish tile sizes (137/191/233 dark,
+// 149/199/251 light) so their combined repeat is astronomically large and no
+// seam is ever perceivable. The near layer is crisp and sparse; the far "dust"
+// layer is dim and dense — the layer that gives depth. Beneath the stars sit a
+// deep-blue -> violet nebula (two soft ellipses) and a center vignette that keeps
+// the reading column the calmest, lowest-contrast area of the whole canvas.
+//
+// Layer stacking order (CSS paints image #1 on TOP):
+//   1. near stars   — brighter, largest visible drift  (tile 137 / 149)
+//   2. mid stars    — softer, medium                    (tile 191 / 199)
+//   3. far dust     — dimmest, slowest, most-repeated   (tile 233 / 251)
+//   4. center vignette                                  (100% 100%, static)
+//   5. nebula wash A                                    (100% 100%, static)
+//   6. nebula wash B                                    (100% 100%, static)
+//
+// Animation: `starDrift` (see animStars.css.ts) is a SLOW background-position PAN
+// that translates each star layer by an exact integer number of its own tiles,
+// so the loop is seamless AND the three layers drift at different apparent
+// speeds (parallax). getChatBg adds willChange/contain for the animated case and
+// STRIPS the `animation` for prefers-reduced-motion — at which point the static
+// backgroundPosition below (identical to the keyframe's 0% frame) shows as a
+// fully finished starfield on its own.
+//
+// Density is kept modest toward the center by the vignette + conservative dot
+// sizes, and every star opacity stays low so text over the field always clears
+// WCAG-AA in both themes.
+
+export const animStars: ChatBgVariants = {
+  // Dark: cool white + faint blue stars on a near-black cosmos, lifted onto a
+  // deep-blue -> violet nebula with a soft vignette darkening the calm center.
+  dark: {
+    backgroundColor: 'oklch(0.15 0.03 275)',
+    backgroundImage: [
+      // 1. near stars — crisp cool-white, sparse, the "fast" parallax layer
+      'radial-gradient(circle at center, oklch(0.98 0.012 255 / 0.85) 0.6px, transparent 1.5px)',
+      // 2. mid stars — softer, a touch blue, more of them
+      'radial-gradient(circle at center, oklch(0.90 0.03 260 / 0.52) 0.6px, transparent 1.3px)',
+      // 3. far dust — faint blue haze, the slow depth layer (most repeats)
+      'radial-gradient(circle at center, oklch(0.78 0.06 255 / 0.28) 0.5px, transparent 1.1px)',
+      // 4. center vignette — keeps the reading column calmest / lowest-contrast
+      'radial-gradient(ellipse 120% 90% at 50% 42%, transparent 40%, oklch(0.09 0.03 270 / 0.58) 100%)',
+      // 5. nebula wash A — deep violet high-right
+      'radial-gradient(ellipse 140% 120% at 78% 10%, oklch(0.26 0.09 285 / 0.55) 0%, transparent 55%)',
+      // 6. nebula wash B — deep blue low-left
+      'radial-gradient(ellipse 130% 110% at 16% 94%, oklch(0.21 0.07 250 / 0.50) 0%, transparent 58%)',
+    ].join(','),
+    backgroundSize: [
+      '137px 137px', // near stars
+      '191px 191px', // mid stars
+      '233px 233px', // far dust
+      '100% 100%', // vignette
+      '100% 100%', // nebula A
+      '100% 100%', // nebula B
+    ].join(','),
+    // Must equal starDrift's 0% frame so reduced-motion shows this exact field.
+    backgroundPosition: [
+      '0 0', // near
+      '61px 43px', // mid  (offset breaks tile alignment)
+      '113px 97px', // far  (offset again)
+      '0 0', // vignette
+      '0 0', // nebula A
+      '0 0', // nebula B
+    ].join(','),
+    animation: `${starDrift} 90s linear infinite`,
+  },
+
+  // Light: an airy pre-dawn sky. No literal white-on-white stars — instead very
+  // soft pale sparkles plus the merest cool speckles, floated on a gentle cool
+  // gradient. Reads as elegant atmosphere, never as noise over text.
+  light: {
+    backgroundColor: 'oklch(0.965 0.008 255)',
+    backgroundImage: [
+      // 1. near sparkles — a hair brighter/warmer than the sky
+      'radial-gradient(circle at center, oklch(0.995 0.015 90 / 0.50) 0.6px, transparent 1.5px)',
+      // 2. mid cool speckles — faintest hint of darkness for texture/contrast
+      'radial-gradient(circle at center, oklch(0.60 0.05 260 / 0.15) 0.5px, transparent 1.2px)',
+      // 3. far dust — very soft cool haze, the slow depth layer
+      'radial-gradient(circle at center, oklch(0.70 0.04 255 / 0.11) 0.5px, transparent 1.1px)',
+      // 4. center vignette — subtly brightens the calm reading center
+      'radial-gradient(ellipse 120% 90% at 50% 44%, oklch(1 0 0 / 0.45) 30%, transparent 100%)',
+      // 5. pre-dawn wash A — cool blue high-right
+      'radial-gradient(ellipse 150% 120% at 80% 6%, oklch(0.90 0.05 255 / 0.60) 0%, transparent 60%)',
+      // 6. pre-dawn wash B — warm blush low-left
+      'radial-gradient(ellipse 140% 120% at 14% 96%, oklch(0.93 0.04 40 / 0.42) 0%, transparent 62%)',
+    ].join(','),
+    // Same tile sizes as dark (137/191/233). The shared starDrift keyframe pans
+    // each layer by an exact integer multiple of ITS tile (near 2x137, mid 1x191,
+    // far 1x233); reusing these tiles here guarantees the loop wraps seamlessly in
+    // light mode too, since one keyframe drives both themes. Coprime-ish sizes keep
+    // the combined repeat astronomically large so no seam is ever perceivable.
+    backgroundSize: [
+      '137px 137px', // near sparkles
+      '191px 191px', // mid speckles
+      '233px 233px', // far dust
+      '100% 100%', // vignette
+      '100% 100%', // wash A
+      '100% 100%', // wash B
+    ].join(','),
+    // Positions mirror the keyframe 0% frame (== reduced-motion static field).
+    backgroundPosition: [
+      '0 0', // near
+      '61px 43px', // mid
+      '113px 97px', // far
+      '0 0', // vignette
+      '0 0', // wash A
+      '0 0', // wash B
+    ].join(','),
+    animation: `${starDrift} 100s linear infinite`,
+  },
+};

src/app/features/lotus/backgrounds/blueprint.ts

@@ -0,0 +1,85 @@
+import { ChatBgVariants } from './types';
+
+// blueprint — an engineering / architectural drafting sheet.
+//
+// Layers (painted top-to-bottom):
+//   1. SVG draftsman tick-marks + a centred crosshair accent (96px tile — lands
+//      exactly on the major grid; corner quarter-arms tile into a full "+" on
+//      every major intersection).
+//   2. Major grid lines (heavier) — 96px.
+//   3. Minor grid lines (fine, fainter) — 16px  (96 = 6 × 16, so it nests
+//      seamlessly inside the major grid with no beat/moiré).
+//   4. A soft radial vignette + a gentle sheet-glow so the surface reads like a
+//      real drafting sheet with subtle dimension rather than a flat tile.
+//
+// Everything is kept at low alpha (~0.03–0.16) so the motif is felt, not read:
+// crisp message text sits comfortably above it in both themes (WCAG-AA safe).
+
+const DARK_TICKS =
+  'url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2296%22%20height%3D%2296%22%3E%3Cg%20stroke%3D%22oklch%280.72%200.11%20230%20%2F%200.32%29%22%20stroke-width%3D%221%22%3E%3Cpath%20d%3D%22M0%200%20H7%20M0%200%20V7%22%2F%3E%3Cpath%20d%3D%22M96%200%20H89%20M96%200%20V7%22%2F%3E%3Cpath%20d%3D%22M0%2096%20H7%20M0%2096%20V89%22%2F%3E%3Cpath%20d%3D%22M96%2096%20H89%20M96%2096%20V89%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.72%200.11%20230%20%2F%200.18%29%22%20stroke-width%3D%221%22%3E%3Cpath%20d%3D%22M48%2044%20V52%20M44%2048%20H52%22%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E")';
+
+const LIGHT_TICKS =
+  'url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2296%22%20height%3D%2296%22%3E%3Cg%20stroke%3D%22oklch%280.48%200.13%20250%20%2F%200.38%29%22%20stroke-width%3D%221%22%3E%3Cpath%20d%3D%22M0%200%20H7%20M0%200%20V7%22%2F%3E%3Cpath%20d%3D%22M96%200%20H89%20M96%200%20V7%22%2F%3E%3Cpath%20d%3D%22M0%2096%20H7%20M0%2096%20V89%22%2F%3E%3Cpath%20d%3D%22M96%2096%20H89%20M96%2096%20V89%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.48%200.13%20250%20%2F%200.22%29%22%20stroke-width%3D%221%22%3E%3Cpath%20d%3D%22M48%2044%20V52%20M44%2048%20H52%22%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E")';
+
+export const blueprint: ChatBgVariants = {
+  // Cyan-blue lines on a deep navy sheet.
+  dark: {
+    backgroundColor: 'oklch(0.22 0.05 250)',
+    backgroundImage: [
+      // 1. draftsman ticks + centre crosshair
+      DARK_TICKS,
+      // 4a. sheet-glow: a faint cooler highlight drifting off the top-left,
+      //     giving the flat navy some dimension.
+      'radial-gradient(120% 120% at 18% 8%, oklch(0.30 0.06 245 / 0.55) 0%, transparent 55%)',
+      // 4b. vignette: gently darkens the corners like a drafting sheet edge.
+      'radial-gradient(140% 140% at 50% 42%, transparent 58%, oklch(0.14 0.04 255 / 0.5) 100%)',
+      // 2. major grid (heavier)
+      'linear-gradient(oklch(0.72 0.12 230 / 0.13) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.72 0.12 230 / 0.13) 1px, transparent 1px)',
+      // 3. minor grid (fine, fainter)
+      'linear-gradient(oklch(0.72 0.12 230 / 0.05) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.72 0.12 230 / 0.05) 1px, transparent 1px)',
+    ].join(','),
+    backgroundSize: [
+      '96px 96px', // ticks
+      '100% 100%', // sheet-glow
+      '100% 100%', // vignette
+      '96px 96px', // major V
+      '96px 96px', // major H
+      '16px 16px', // minor V
+      '16px 16px', // minor H
+    ].join(','),
+    // All layers share the default top-left (0 0) origin so the tick tile, the
+    // 96px major grid and the 16px minor grid stay phase-locked (96 = 6 × 16) —
+    // no drift, no visible seams. (A per-layer `center` would let the differently
+    // sized tiles center independently and fall out of alignment.)
+  },
+
+  // Blue lines on a cool paper-white sheet.
+  light: {
+    backgroundColor: 'oklch(0.97 0.01 240)',
+    backgroundImage: [
+      LIGHT_TICKS,
+      // sheet-glow: a hint of brighter paper toward the top-left.
+      'radial-gradient(120% 120% at 18% 8%, oklch(0.99 0.008 240 / 0.7) 0%, transparent 55%)',
+      // vignette: soft cool shading into the corners.
+      'radial-gradient(140% 140% at 50% 42%, transparent 60%, oklch(0.90 0.02 245 / 0.55) 100%)',
+      // major grid (heavier)
+      'linear-gradient(oklch(0.48 0.13 250 / 0.15) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.48 0.13 250 / 0.15) 1px, transparent 1px)',
+      // minor grid (fine, fainter)
+      'linear-gradient(oklch(0.48 0.13 250 / 0.06) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.48 0.13 250 / 0.06) 1px, transparent 1px)',
+    ].join(','),
+    backgroundSize: [
+      '96px 96px',
+      '100% 100%',
+      '100% 100%',
+      '96px 96px',
+      '96px 96px',
+      '16px 16px',
+      '16px 16px',
+    ].join(','),
+    // Shared top-left origin keeps the tick tile and both grids phase-locked.
+  },
+};

src/app/features/lotus/backgrounds/chevron.ts

@@ -0,0 +1,76 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// chevron — refined woven-upholstery zigzag.
+//
+// The motif is a continuous, crisp chevron built to read as *textured fabric*
+// rather than flat stripes. The zigzag threads themselves are drawn with a
+// tiny inline-SVG tile (guaranteed geometrically seamless — the "V" path exits
+// each tile edge exactly where the next tile's path enters, both horizontally
+// and vertically). Over that, layered CSS gradients add the premium feel:
+//   • a soft light→shade sweep across the weave gives each band an embossed,
+//     woven cross-section (catches light on one diagonal face, shade on the
+//     other);
+//   • a faint two-tone wash alternates the tint of successive chevron rows for
+//     an interlocked-yarn look;
+//   • a gentle centre lift + corner vignette settle the field so text always
+//     sits over the calmer middle.
+//
+// SEAMLESS TILING
+// The SVG is a WxH tile whose path is one full zigzag wave: it starts at the
+// left edge, dips to the vertex, rises to the right edge at the SAME y it
+// started — so horizontally each tile's end meets the next tile's start with no
+// step. Two stacked strokes (offset by H) fill the vertical repeat, and the
+// tile height equals the row pitch, so vertical stacking is seamless too. The
+// gradient overlays are non-repeating (100% 100%) or share the SVG's tile
+// width, so none of them introduce a seam.
+//
+// Everything sits at low alpha (~0.03–0.11) so the pattern is felt, not read:
+// crisp message text stays comfortably WCAG-AA in both themes.
+
+// One zigzag wave, 40px wide × 20px tall. Path enters at (0,4), dips to the
+// vertex at (20,16), climbs back to (40,4) — identical entry/exit y => seamless
+// horizontal repeat. A second copy shifted +10 in y keeps a soft double thread.
+const svg = (stroke: string, faint: string) =>
+  'url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20' +
+  'width%3D%2240%22%20height%3D%2220%22%3E' +
+  `%3Cpath%20d%3D%22M0%204%20L20%2016%20L40%204%22%20fill%3D%22none%22%20stroke%3D%22${stroke}%22%20stroke-width%3D%223%22%2F%3E` +
+  `%3Cpath%20d%3D%22M0%2014%20L20%2026%20L40%2014%20M0%20-6%20L20%206%20L40%20-6%22%20fill%3D%22none%22%20stroke%3D%22${faint}%22%20stroke-width%3D%222%22%2F%3E` +
+  '%3C%2Fsvg%3E")';
+
+const dark: CSSProperties = {
+  backgroundColor: 'oklch(0.20 0.022 260)',
+  backgroundImage: [
+    // 1. The zigzag threads — muted indigo/slate, main + fainter under-thread.
+    svg('oklch(0.55 0.05 265 %2F 0.16)', 'oklch(0.50 0.045 262 %2F 0.07)'),
+    // 2. Woven emboss — a soft diagonal light→shade sweep across the weave so
+    //    the bands catch light on one face and fall to shade on the other.
+    'linear-gradient(135deg, oklch(0.62 0.05 265 / 0.05) 0%, transparent 45%, transparent 55%, oklch(0.14 0.02 260 / 0.06) 100%)',
+    // 3. Two-tone weft — a whisper shade on alternate chevron rows.
+    'repeating-linear-gradient(0deg, oklch(0.50 0.04 258 / 0.035) 0px, oklch(0.50 0.04 258 / 0.035) 20px, transparent 20px, transparent 40px)',
+    // 4. Tonal wash — cool centre lift for gentle depth.
+    'radial-gradient(ellipse 90% 75% at 50% 42%, oklch(0.26 0.03 262 / 0.40) 0%, transparent 60%)',
+    // 5. Vignette — feather corners into deeper charcoal-blue.
+    'radial-gradient(ellipse 120% 130% at 50% 45%, transparent 60%, oklch(0.15 0.02 260 / 0.55) 100%)',
+  ].join(','),
+  backgroundSize: '40px 20px, 100% 100%, 40px 40px, 100% 100%, 100% 100%',
+};
+
+const light: CSSProperties = {
+  backgroundColor: 'oklch(0.965 0.006 85)',
+  backgroundImage: [
+    // 1. The zigzag threads — soft dusty-blue, main + fainter under-thread.
+    svg('oklch(0.55 0.05 255 %2F 0.14)', 'oklch(0.52 0.045 255 %2F 0.06)'),
+    // 2. Woven emboss — diagonal light→shade sweep for a knit-fabric surface.
+    'linear-gradient(135deg, oklch(0.99 0.008 85 / 0.06) 0%, transparent 45%, transparent 55%, oklch(0.55 0.05 255 / 0.05) 100%)',
+    // 3. Two-tone weft — faint alternating-row shade.
+    'repeating-linear-gradient(0deg, oklch(0.52 0.04 255 / 0.03) 0px, oklch(0.52 0.04 255 / 0.03) 20px, transparent 20px, transparent 40px)',
+    // 4. Tonal wash — warm paper highlight through the reading centre.
+    'radial-gradient(ellipse 90% 75% at 50% 42%, oklch(0.99 0.008 85 / 0.55) 0%, transparent 60%)',
+    // 5. Vignette — settle corners into a slightly deeper dusty tone.
+    'radial-gradient(ellipse 120% 130% at 50% 45%, transparent 60%, oklch(0.91 0.012 250 / 0.40) 100%)',
+  ].join(','),
+  backgroundSize: '40px 20px, 100% 100%, 40px 40px, 100% 100%, 100% 100%',
+};
+
+export const chevron: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/circuit.ts

@@ -0,0 +1,116 @@
+import { ChatBgVariants } from './types';
+
+// circuit — an elegant printed-circuit board.
+//
+// Concept: thin right-angle copper traces route between small pads / vias and
+// the occasional solder-junction dot, over a deep board base. It reads as an
+// authentic PCB rather than a plain grid: the routing turns corners, dead-ends
+// at through-hole pads, and picks up faint via-glows — but stays sparse, with
+// generous negative space so message text always wins the contrast fight.
+//
+// The trace network is a single inline SVG data-URI (encodeURIComponent, NOT
+// base64 — CSP / Tauri-safe) so the geometry can be real right-angle routing
+// instead of gradient fakery. It is layered over a subtle board-base gradient.
+//
+// SEAMLESS TILING — the 120×120 tile is authored so every trace that leaves an
+// edge re-enters at the identical coordinate on the OPPOSITE edge, so the copper
+// runs continuously across tile boundaries with no visible seam:
+//   • horizontal runs cross the left/right edges at y = 30 and y = 90
+//   • vertical   runs cross the top/bottom edges at x = 40 and x = 88
+// backgroundSize is set to the tile size (120px) so those crossings line up
+// exactly on repeat.
+//
+// Two hand-tuned SVGs (dark / light) differ only in stroke/fill colour + alpha.
+// Alphas stay low (≈0.05–0.5 on the accents, traces ~0.1–0.16) so the pattern is
+// felt, not read — crisp text sits comfortably above it in both themes.
+
+// Shared geometry, colour-parameterised so the two themes stay pixel-identical
+// in layout and only diverge in palette.
+const tile = (
+  trace: string, // trace stroke colour
+  traceW: string, // trace stroke-width
+  pad: string, // pad ring colour
+  padFill: string, // pad centre / board-coloured hole
+  via: string, // via glow colour
+  junction: string, // filled junction-dot colour
+): string => {
+  const svg = `<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'>
+<g fill='none' stroke='${trace}' stroke-width='${traceW}' stroke-linecap='round' stroke-linejoin='round'>
+<path d='M0 30 H26 V58 H60'/>
+<path d='M60 58 V90 H120'/>
+<path d='M0 90 H40 V120'/>
+<path d='M40 0 V22 H88'/>
+<path d='M88 0 V44 H104'/>
+<path d='M104 44 V90 H120'/>
+<path d='M88 120 V90'/>
+<path d='M60 30 H120'/>
+<path d='M60 30 V58'/>
+<path d='M26 58 V90'/>
+</g>
+<g fill='none' stroke='${pad}' stroke-width='${traceW}'>
+<circle cx='26' cy='58' r='3.4'/>
+<circle cx='40' cy='90' r='3.4'/>
+<circle cx='88' cy='22' r='3.4'/>
+<circle cx='104' cy='44' r='3.4'/>
+</g>
+<g fill='${padFill}'>
+<circle cx='26' cy='58' r='1.3'/>
+<circle cx='40' cy='90' r='1.3'/>
+<circle cx='88' cy='22' r='1.3'/>
+<circle cx='104' cy='44' r='1.3'/>
+</g>
+<g fill='${junction}'>
+<circle cx='60' cy='58' r='2'/>
+<circle cx='60' cy='30' r='2'/>
+<circle cx='104' cy='90' r='2'/>
+</g>
+<g fill='${via}'>
+<circle cx='26' cy='58' r='7'/>
+<circle cx='88' cy='22' r='7'/>
+<circle cx='104' cy='44' r='7'/>
+</g>
+</svg>`;
+  return `url("data:image/svg+xml,${encodeURIComponent(svg)}")`;
+};
+
+export const circuit: ChatBgVariants = {
+  // Faint teal/green copper with dim cyan via-glows on a near-black board.
+  dark: {
+    backgroundColor: 'oklch(0.17 0.02 165)',
+    backgroundImage: [
+      tile(
+        'oklch(0.7 0.1 165 / 0.16)', // traces — faint teal-green copper
+        '1',
+        'oklch(0.72 0.11 175 / 0.32)', // pad rings — slightly brighter
+        'oklch(0.17 0.02 165)', // pad holes — board colour (drilled look)
+        'oklch(0.78 0.13 200 / 0.14)', // via glow — dim cyan halo
+        'oklch(0.74 0.12 170 / 0.4)', // junction dots — solid copper
+      ),
+      // board-base: a gentle diagonal sheen so the flat near-black gains depth.
+      'radial-gradient(130% 130% at 20% 12%, oklch(0.22 0.03 170 / 0.6) 0%, transparent 58%)',
+      // vignette: barely darkens the corners like a laminated board edge.
+      'radial-gradient(140% 140% at 50% 45%, transparent 62%, oklch(0.12 0.02 165 / 0.55) 100%)',
+    ].join(','),
+    backgroundSize: ['120px 120px', '100% 100%', '100% 100%'].join(','),
+  },
+
+  // Soft green-grey traces on a pale board.
+  light: {
+    backgroundColor: 'oklch(0.96 0.012 160)',
+    backgroundImage: [
+      tile(
+        'oklch(0.55 0.07 165 / 0.24)', // traces — soft green-grey copper
+        '1',
+        'oklch(0.5 0.08 170 / 0.4)', // pad rings
+        'oklch(0.96 0.012 160)', // pad holes — board colour
+        'oklch(0.6 0.09 200 / 0.1)', // via glow — faint cool halo
+        'oklch(0.5 0.08 165 / 0.42)', // junction dots
+      ),
+      // board-base: a hint of brighter laminate toward the top-left.
+      'radial-gradient(130% 130% at 20% 12%, oklch(0.99 0.008 160 / 0.7) 0%, transparent 58%)',
+      // vignette: soft green-grey shading into the corners.
+      'radial-gradient(140% 140% at 50% 45%, transparent 62%, oklch(0.9 0.02 160 / 0.5) 100%)',
+    ].join(','),
+    backgroundSize: ['120px 120px', '100% 100%', '100% 100%'].join(','),
+  },
+};

src/app/features/lotus/backgrounds/crosshatch.ts

@@ -0,0 +1,56 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// crosshatch — fine pen-and-ink engraving, like a banknote guilloché.
+// Three hatch directions (right-leaning, left-leaning, near-horizontal cross)
+// are layered at low opacity so the eye reads a woven ink texture rather than
+// discrete stripes. Each direction uses a slightly different pitch so the
+// combined pattern never lines up into a coarse moire, and a barely-there
+// diagonal tonal gradient lends etched depth.
+//
+// Seamless tiling: each hatch is a `repeating-linear-gradient`, which repeats
+// infinitely by definition, so the layers are left at `backgroundSize: auto`
+// and tile with no visible seam at any element size (constraining a diagonal
+// repeat to a small square would clip it mid-period and create a seam). The
+// tonal wash is a single non-repeating gradient stretched to `cover`.
+//
+// Opacities are kept in the 0.02–0.05 range so the texture is felt, not read —
+// crisp message text sits comfortably above it in both themes (WCAG-AA safe).
+
+const dark: CSSProperties = {
+  // near-black base with a whisper of cool blue so silver ink reads as engraving
+  backgroundColor: 'oklch(0.16 0.01 255)',
+  backgroundImage: [
+    // faint tonal gradient — top-left slightly lifted for etched depth
+    'linear-gradient(135deg, oklch(0.20 0.012 255 / 0.5) 0%, oklch(0.15 0.01 255 / 0) 55%, oklch(0.14 0.008 260 / 0.45) 100%)',
+    // primary hatch, right-leaning fine lines (cool silver ink), ~9px pitch
+    'repeating-linear-gradient(45deg, oklch(0.75 0.02 250 / 0.05) 0, oklch(0.75 0.02 250 / 0.05) 0.75px, transparent 0.75px, transparent 9px)',
+    // secondary hatch, left-leaning — the cross of the crosshatch
+    'repeating-linear-gradient(135deg, oklch(0.75 0.02 250 / 0.045) 0, oklch(0.75 0.02 250 / 0.045) 0.75px, transparent 0.75px, transparent 9px)',
+    // tertiary hatch, right-leaning at a denser pitch for engraved richness
+    'repeating-linear-gradient(45deg, oklch(0.78 0.018 250 / 0.02) 0, oklch(0.78 0.018 250 / 0.02) 0.5px, transparent 0.5px, transparent 4.5px)',
+    // quaternary near-horizontal fill line, very faint, weaves the mesh together
+    'repeating-linear-gradient(20deg, oklch(0.72 0.015 255 / 0.018) 0, oklch(0.72 0.015 255 / 0.018) 0.5px, transparent 0.5px, transparent 13px)',
+  ].join(','),
+  backgroundSize: 'cover, auto, auto, auto, auto',
+};
+
+const light: CSSProperties = {
+  // warm paper base — graphite ink on cream stock
+  backgroundColor: 'oklch(0.975 0.006 85)',
+  backgroundImage: [
+    // faint tonal wash — soft warm depth for aged-paper feel
+    'linear-gradient(135deg, oklch(0.94 0.008 85 / 0.55) 0%, oklch(0.98 0.005 85 / 0) 55%, oklch(0.93 0.01 80 / 0.5) 100%)',
+    // primary hatch, right-leaning graphite lines, ~9px pitch
+    'repeating-linear-gradient(45deg, oklch(0.42 0.01 265 / 0.055) 0, oklch(0.42 0.01 265 / 0.055) 0.75px, transparent 0.75px, transparent 9px)',
+    // secondary hatch, left-leaning — the cross
+    'repeating-linear-gradient(135deg, oklch(0.42 0.01 265 / 0.05) 0, oklch(0.42 0.01 265 / 0.05) 0.75px, transparent 0.75px, transparent 9px)',
+    // tertiary denser right-leaning hatch for engraved fineness
+    'repeating-linear-gradient(45deg, oklch(0.40 0.012 265 / 0.025) 0, oklch(0.40 0.012 265 / 0.025) 0.5px, transparent 0.5px, transparent 4.5px)',
+    // quaternary near-horizontal weave line, barely-there
+    'repeating-linear-gradient(20deg, oklch(0.45 0.01 260 / 0.022) 0, oklch(0.45 0.01 260 / 0.022) 0.5px, transparent 0.5px, transparent 13px)',
+  ].join(','),
+  backgroundSize: 'cover, auto, auto, auto, auto',
+};
+
+export const crosshatch: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/herringbone.ts

@@ -0,0 +1,52 @@
+import { ChatBgVariants } from './types';
+
+// Herringbone — a refined, tactile broken-zigzag weave (the classic parquet / tweed
+// motif) rather than a flat hairline grid. Each plank is drawn twice in a compact SVG
+// data-URI tile: a lit "thread" and a 0.6px-offset shadow companion, so every plank
+// reads as a beveled, three-dimensional strand of fabric instead of a line.
+//
+// SEAMLESS TILING: planks live on a 12px lattice and their orientation follows the true
+// herringbone rule orient(cx, cy) = '/'  when (cx - cy) mod 4 in {0, 1}, else '\\'.
+// That rule is exactly periodic every 4 cells in BOTH axes, so the 48x48px tile repeats
+// with no seam at any scroll offset; segment endpoints all land on lattice corners, so
+// the broken V's interlock perfectly across tile edges.
+//
+// DEPTH: beneath the weave sit two very low-contrast oklch layers — a diagonal two-tone
+// wash that gives the fabric a faint lit/shadowed side, plus a soft vignette that lets
+// the centre (where text lives) stay calmest. Everything is kept in the "felt, not read"
+// opacity band so WCAG-AA body text sits comfortably on top in both themes.
+
+const WEAVE_DARK =
+  'data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2248%22%20height%3D%2248%22%20viewBox%3D%220%200%2048%2048%22%3E%3Cpath%20d%3D%22M-11.4%200.6L0.6%20-11.4M0.6%200.6L12.6%20-11.4M12.6%20-11.4L24.6%200.6M24.6%20-11.4L36.6%200.6M36.6%200.6L48.6%20-11.4M48.6%200.6L60.6%20-11.4M-11.4%200.6L0.6%2012.6M0.6%2012.6L12.6%200.6M12.6%2012.6L24.6%200.6M24.6%200.6L36.6%2012.6M36.6%200.6L48.6%2012.6M48.6%2012.6L60.6%200.6M-11.4%2012.6L0.6%2024.6M0.6%2012.6L12.6%2024.6M12.6%2024.6L24.6%2012.6M24.6%2024.6L36.6%2012.6M36.6%2012.6L48.6%2024.6M48.6%2012.6L60.6%2024.6M-11.4%2036.6L0.6%2024.6M0.6%2024.6L12.6%2036.6M12.6%2024.6L24.6%2036.6M24.6%2036.6L36.6%2024.6M36.6%2036.6L48.6%2024.6M48.6%2024.6L60.6%2036.6M-11.4%2048.6L0.6%2036.6M0.6%2048.6L12.6%2036.6M12.6%2036.6L24.6%2048.6M24.6%2036.6L36.6%2048.6M36.6%2048.6L48.6%2036.6M48.6%2048.6L60.6%2036.6M-11.4%2048.6L0.6%2060.6M0.6%2060.6L12.6%2048.6M12.6%2060.6L24.6%2048.6M24.6%2048.6L36.6%2060.6M36.6%2048.6L48.6%2060.6M48.6%2060.6L60.6%2048.6%22%20fill%3D%22none%22%20stroke%3D%22rgb%2810%2C8%2C6%29%22%20stroke-width%3D%221.1%22%20stroke-opacity%3D%220.085%22%20stroke-linecap%3D%22round%22%2F%3E%3Cpath%20d%3D%22M-12%200L0%20-12M0%200L12%20-12M12%20-12L24%200M24%20-12L36%200M36%200L48%20-12M48%200L60%20-12M-12%200L0%2012M0%2012L12%200M12%2012L24%200M24%200L36%2012M36%200L48%2012M48%2012L60%200M-12%2012L0%2024M0%2012L12%2024M12%2024L24%2012M24%2024L36%2012M36%2012L48%2024M48%2012L60%2024M-12%2036L0%2024M0%2024L12%2036M12%2024L24%2036M24%2036L36%2024M36%2036L48%2024M48%2024L60%2036M-12%2048L0%2036M0%2048L12%2036M12%2036L24%2048M24%2036L36%2048M36%2048L48%2036M48%2048L60%2036M-12%2048L0%2060M0%2060L12%2048M12%2060L24%2048M24%2048L36%2060M36%2048L48%2060M48%2060L60%2048%22%20fill%3D%22none%22%20stroke%3D%22rgb%28210%2C199%2C180%29%22%20stroke-width%3D%221.1%22%20stroke-opacity%3D%220.111%22%20stroke-linecap%3D%22round%22%2F%3E%3C%2Fsvg%3E';
+const WEAVE_LIGHT =
+  'data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2248%22%20height%3D%2248%22%20viewBox%3D%220%200%2048%2048%22%3E%3Cpath%20d%3D%22M-11.4%200.6L0.6%20-11.4M0.6%200.6L12.6%20-11.4M12.6%20-11.4L24.6%200.6M24.6%20-11.4L36.6%200.6M36.6%200.6L48.6%20-11.4M48.6%200.6L60.6%20-11.4M-11.4%200.6L0.6%2012.6M0.6%2012.6L12.6%200.6M12.6%2012.6L24.6%200.6M24.6%200.6L36.6%2012.6M36.6%200.6L48.6%2012.6M48.6%2012.6L60.6%200.6M-11.4%2012.6L0.6%2024.6M0.6%2012.6L12.6%2024.6M12.6%2024.6L24.6%2012.6M24.6%2024.6L36.6%2012.6M36.6%2012.6L48.6%2024.6M48.6%2012.6L60.6%2024.6M-11.4%2036.6L0.6%2024.6M0.6%2024.6L12.6%2036.6M12.6%2024.6L24.6%2036.6M24.6%2036.6L36.6%2024.6M36.6%2036.6L48.6%2024.6M48.6%2024.6L60.6%2036.6M-11.4%2048.6L0.6%2036.6M0.6%2048.6L12.6%2036.6M12.6%2036.6L24.6%2048.6M24.6%2036.6L36.6%2048.6M36.6%2048.6L48.6%2036.6M48.6%2048.6L60.6%2036.6M-11.4%2048.6L0.6%2060.6M0.6%2060.6L12.6%2048.6M12.6%2060.6L24.6%2048.6M24.6%2048.6L36.6%2060.6M36.6%2048.6L48.6%2060.6M48.6%2060.6L60.6%2048.6%22%20fill%3D%22none%22%20stroke%3D%22rgb%28126%2C116%2C98%29%22%20stroke-width%3D%221.1%22%20stroke-opacity%3D%220.075%22%20stroke-linecap%3D%22round%22%2F%3E%3Cpath%20d%3D%22M-12%200L0%20-12M0%200L12%20-12M12%20-12L24%200M24%20-12L36%200M36%200L48%20-12M48%200L60%20-12M-12%200L0%2012M0%2012L12%200M12%2012L24%200M24%200L36%2012M36%200L48%2012M48%2012L60%200M-12%2012L0%2024M0%2012L12%2024M12%2024L24%2012M24%2024L36%2012M36%2012L48%2024M48%2012L60%2024M-12%2036L0%2024M0%2024L12%2036M12%2024L24%2036M24%2036L36%2024M36%2036L48%2024M48%2024L60%2036M-12%2048L0%2036M0%2048L12%2036M12%2036L24%2048M24%2036L36%2048M36%2048L48%2036M48%2048L60%2036M-12%2048L0%2060M0%2060L12%2048M12%2060L24%2048M24%2048L36%2060M36%2048L48%2060M48%2060L60%2048%22%20fill%3D%22none%22%20stroke%3D%22rgb%28255%2C253%2C247%29%22%20stroke-width%3D%221.1%22%20stroke-opacity%3D%220.098%22%20stroke-linecap%3D%22round%22%2F%3E%3C%2Fsvg%3E';
+
+export const herringbone: ChatBgVariants = {
+  // Warm taupe threads (~oklch(0.79 0.02 75)) over a charcoal base. The two-tone wash
+  // runs cool-charcoal -> slightly warmer charcoal across the diagonal so the weave has
+  // a gentle light side; the vignette darkens the far corners a touch for depth.
+  dark: {
+    backgroundColor: '#14120f',
+    backgroundImage: [
+      `url("${WEAVE_DARK}")`,
+      'linear-gradient(135deg, oklch(0.26 0.012 70 / 0.5) 0%, oklch(0.2 0.008 60 / 0.5) 100%)',
+      'radial-gradient(120% 120% at 50% 40%, oklch(0.24 0.01 65 / 0) 55%, oklch(0.12 0.006 55 / 0.45) 100%)',
+    ].join(','),
+    backgroundSize: '48px 48px, 100% 100%, 100% 100%',
+    backgroundRepeat: 'repeat, no-repeat, no-repeat',
+  },
+
+  // Greige threads (shadow ~oklch(0.6 0.015 75)) with a warm-white highlight over a warm
+  // off-white base. The wash tilts warm-white -> faint greige across the diagonal for the
+  // lit/shadow side; a whisper-soft vignette keeps corners from going flat.
+  light: {
+    backgroundColor: '#f6f3ec',
+    backgroundImage: [
+      `url("${WEAVE_LIGHT}")`,
+      'linear-gradient(135deg, oklch(0.99 0.006 85 / 0.6) 0%, oklch(0.93 0.01 80 / 0.6) 100%)',
+      'radial-gradient(120% 120% at 50% 40%, oklch(0.98 0.006 85 / 0) 58%, oklch(0.87 0.012 78 / 0.4) 100%)',
+    ].join(','),
+    backgroundSize: '48px 48px, 100% 100%, 100% 100%',
+    backgroundRepeat: 'repeat, no-repeat, no-repeat',
+  },
+};

src/app/features/lotus/backgrounds/hexgrid.ts

@@ -0,0 +1,66 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// hexgrid — a refined sci-fi HUD honeycomb lattice.
+//
+// The motif is a crisp pointy-top hexagon honeycomb, drawn as thin interlocking
+// outlines like the readout of a sci-fi interface. It is layered over a soft
+// depth sheen: a faint central glow lifts the middle of the field and a gentle
+// vignette settles the corners, so the lattice reads as a lit HUD surface with
+// dimension rather than a flat repeating tile. Everything is kept at low alpha
+// (hex lines ~0.14–0.16, washes well under legibility thresholds) so the motif
+// is *felt, not read* — crisp message text stays comfortably WCAG-AA in both
+// themes.
+//
+// SEAMLESS TILING
+// The hex outlines live in a single inline-SVG data-URI tile of exactly
+// √3·s × 3·s = 34.641 × 60 (side length s = 20). That is the natural repeat cell
+// of a pointy-top honeycomb: one full central hexagon plus the six neighbours
+// whose bodies straddle the tile edges. Because each straddling hexagon is drawn
+// in full, the half that spills past one edge is completed pixel-for-pixel by the
+// matching half re-entering from the opposite edge on the next repeat — the six
+// vertical side edges land exactly on x = 0 and x = 34.641, the slanted edges
+// meet across y = 0 / y = 60, so the lattice interlocks with no seam and no
+// moiré. `backgroundSize: 34.641px 60px` locks the tile to that period; the glow
+// and vignette are single non-repeating layers sized to 100%.
+//
+// DARK vs LIGHT
+// Dark: cool cyan hex lines (oklch 0.72 0.1 200) on a deep blue-black base, with
+// a soft cyan-tinted central glow — the classic "cold HUD" look.
+// Light: soft slate-blue hexes (oklch 0.55 0.07 250) on a pale cool-white sheet,
+// with a bright paper highlight at centre. Each alpha/lightness is tuned
+// independently so both feel equally quiet against their own base.
+
+// One seamless honeycomb tile (√3·20 × 3·20). Colour is injected per-theme.
+const hexTile = (stroke: string): string =>
+  `url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2234.641%22%20height%3D%2260%22%3E%3Cpath%20d%3D%22M17.32%2010L0%2020L0%2040L17.32%2050L34.64%2040L34.64%2020Z%20M0%20-20L-17.32%20-10L-17.32%2010L0%2020L17.32%2010L17.32%20-10Z%20M34.64%20-20L17.32%20-10L17.32%2010L34.64%2020L51.96%2010L51.96%20-10Z%20M0%2040L-17.32%2050L-17.32%2070L0%2080L17.32%2070L17.32%2050Z%20M34.64%2040L17.32%2050L17.32%2070L34.64%2080L51.96%2070L51.96%2050Z%20M17.32%20-50L0%20-40L0%20-20L17.32%20-10L34.64%20-20L34.64%20-40Z%20M17.32%2070L0%2080L0%20100L17.32%20110L34.64%20100L34.64%2080Z%22%20fill%3D%22none%22%20stroke%3D%22${encodeURIComponent(
+    stroke,
+  )}%22%20stroke-width%3D%220.9%22%20stroke-linejoin%3D%22round%22%2F%3E%3C%2Fsvg%3E")`;
+
+const dark: CSSProperties = {
+  backgroundColor: 'oklch(0.19 0.03 245)',
+  backgroundImage: [
+    // 1. the honeycomb lattice — cool cyan hex outlines.
+    hexTile('oklch(0.72 0.1 200 / 0.14)'),
+    // 2. central glow — a soft cyan lift so the field looks lit from within.
+    'radial-gradient(120% 90% at 50% 42%, oklch(0.30 0.05 210 / 0.55) 0%, transparent 60%)',
+    // 3. vignette — settles the corners into the deep base for depth.
+    'radial-gradient(130% 130% at 50% 45%, transparent 55%, oklch(0.13 0.02 240 / 0.55) 100%)',
+  ].join(','),
+  backgroundSize: '34.641px 60px, 100% 100%, 100% 100%',
+};
+
+const light: CSSProperties = {
+  backgroundColor: 'oklch(0.965 0.008 240)',
+  backgroundImage: [
+    // 1. the honeycomb lattice — soft slate-blue hex outlines.
+    hexTile('oklch(0.55 0.07 250 / 0.16)'),
+    // 2. central highlight — a hint of brighter paper toward the middle.
+    'radial-gradient(120% 90% at 50% 40%, oklch(0.99 0.005 240 / 0.7) 0%, transparent 60%)',
+    // 3. vignette — feather the edges into a slightly cooler paper.
+    'radial-gradient(130% 130% at 50% 45%, transparent 58%, oklch(0.90 0.015 245 / 0.5) 100%)',
+  ].join(','),
+  backgroundSize: '34.641px 60px, 100% 100%, 100% 100%',
+};
+
+export const hexgrid: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/neon.ts

@@ -0,0 +1,121 @@
+import { ChatBgVariants } from './types';
+
+// neon — a synthwave neon grid with real bloom, kept restrained for readability.
+//
+// Concept: a retro-futuristic magenta/cyan grid that *glows* rather than shouts.
+// The glow is built the way a real neon tube reads: a crisp hairline of light
+// sitting inside a much wider, softer halo of the same hue. We achieve this per
+// axis by stacking TWO linear-gradient layers that share the identical tile size
+// (so their lines land on exactly the same pixel column/row across every repeat):
+//   - a wide "bloom" line: a fat, very-low-opacity band with a soft gradient
+//     falloff on both sides (transparent -> colour -> transparent), reading as
+//     out-of-focus glow;
+//   - a crisp "core" line: a 1px bright hairline centred in that bloom.
+// A dark radial vignette then pulls the whole grid back toward the edges and
+// keeps the reading column — the calm centre — darkest and highest-contrast, so
+// text stays crisp. Pure CSS: only linear + radial gradients, no assets.
+//
+// Seamless tiling: every grid layer uses the SAME backgroundSize per axis
+// (magenta and cyan share one 88px module in dark; the fine cyan sub-grid is an
+// exact 1/2 divisor at 44px so it re-registers). Because the bloom and core for
+// an axis share a size and a 0/0 position, their lines are always co-registered
+// and no seam is possible. Vignette/wash layers are 100% 100% and never tile.
+
+export const neon: ChatBgVariants = {
+  // Dark: magenta + cyan tubes glowing over near-black, bloom kept low so the
+  // lines are felt, not read. Vignette darkens the centre for legibility.
+  dark: {
+    backgroundColor: 'oklch(0.135 0.02 285)',
+    backgroundImage: [
+      // 1. magenta core hairlines — crisp, bright, thin (vertical + horizontal)
+      'linear-gradient(90deg, oklch(0.68 0.21 350 / 0.34) 0 1px, transparent 1px)',
+      'linear-gradient(0deg,  oklch(0.68 0.21 350 / 0.34) 0 1px, transparent 1px)',
+      // 2. magenta bloom — a wide soft halo hugging the same lines
+      'linear-gradient(90deg, transparent 0, oklch(0.66 0.2 350 / 0.11) 3px, transparent 7px)',
+      'linear-gradient(0deg,  transparent 0, oklch(0.66 0.2 350 / 0.11) 3px, transparent 7px)',
+      // 3. cyan core hairlines on the offset half-grid — the cross accent
+      'linear-gradient(90deg, oklch(0.82 0.13 200 / 0.20) 0 1px, transparent 1px)',
+      'linear-gradient(0deg,  oklch(0.82 0.13 200 / 0.20) 0 1px, transparent 1px)',
+      // 4. cyan bloom — soft cool halo on the same half-grid lines
+      'linear-gradient(90deg, transparent 0, oklch(0.80 0.12 200 / 0.07) 2px, transparent 5px)',
+      'linear-gradient(0deg,  transparent 0, oklch(0.80 0.12 200 / 0.07) 2px, transparent 5px)',
+      // 5. vignette — recede the grid, keep the reading centre calm & dark
+      'radial-gradient(ellipse 125% 95% at 50% 44%, transparent 34%, oklch(0.10 0.02 285 / 0.72) 100%)',
+      // 6. horizon wash — a faint magenta->cyan synthwave glow low on the canvas
+      'radial-gradient(ellipse 150% 90% at 50% 108%, oklch(0.4 0.14 340 / 0.30) 0%, transparent 60%)',
+    ].join(','),
+    backgroundSize: [
+      '88px 88px', // magenta core V
+      '88px 88px', // magenta core H
+      '88px 88px', // magenta bloom V
+      '88px 88px', // magenta bloom H
+      '44px 44px', // cyan core V   (exact 1/2 divisor — re-registers)
+      '44px 44px', // cyan core H
+      '44px 44px', // cyan bloom V
+      '44px 44px', // cyan bloom H
+      '100% 100%', // vignette
+      '100% 100%', // horizon wash
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // magenta core V
+      '0 0', // magenta core H
+      '-3px 0', // magenta bloom V — centre the 7px halo on the 1px core
+      '0 -3px', // magenta bloom H
+      '22px 22px', // cyan core V — sit the fine grid between magenta lines
+      '22px 22px', // cyan core H
+      '20px 22px', // cyan bloom V — centre the 5px halo on the cyan core
+      '22px 20px', // cyan bloom H
+      '0 0', // vignette
+      '0 0', // horizon wash
+    ].join(','),
+  },
+
+  // Light: "neon" reinterpreted as a soft luminous violet/teal grid on a pale
+  // cool-white base — no glow-on-black, just gentle coloured light. Bloom is even
+  // lighter here; a subtle centre-brightening vignette lifts the reading column.
+  light: {
+    backgroundColor: 'oklch(0.972 0.006 275)',
+    backgroundImage: [
+      // 1. violet core hairlines — soft but defined
+      'linear-gradient(90deg, oklch(0.55 0.17 330 / 0.16) 0 1px, transparent 1px)',
+      'linear-gradient(0deg,  oklch(0.55 0.17 330 / 0.16) 0 1px, transparent 1px)',
+      // 2. violet bloom — the merest wide halo for luminosity
+      'linear-gradient(90deg, transparent 0, oklch(0.6 0.16 330 / 0.06) 3px, transparent 7px)',
+      'linear-gradient(0deg,  transparent 0, oklch(0.6 0.16 330 / 0.06) 3px, transparent 7px)',
+      // 3. teal core hairlines on the offset half-grid — cool accent
+      'linear-gradient(90deg, oklch(0.58 0.11 200 / 0.11) 0 1px, transparent 1px)',
+      'linear-gradient(0deg,  oklch(0.58 0.11 200 / 0.11) 0 1px, transparent 1px)',
+      // 4. teal bloom — faint cool halo on the same half-grid lines
+      'linear-gradient(90deg, transparent 0, oklch(0.62 0.1 200 / 0.045) 2px, transparent 5px)',
+      'linear-gradient(0deg,  transparent 0, oklch(0.62 0.1 200 / 0.045) 2px, transparent 5px)',
+      // 5. vignette — brighten the calm reading centre for max legibility
+      'radial-gradient(ellipse 125% 95% at 50% 44%, oklch(1 0 0 / 0.50) 30%, transparent 100%)',
+      // 6. horizon wash — a whisper of violet->teal light low on the canvas
+      'radial-gradient(ellipse 150% 90% at 50% 108%, oklch(0.8 0.09 320 / 0.28) 0%, transparent 60%)',
+    ].join(','),
+    backgroundSize: [
+      '88px 88px', // violet core V
+      '88px 88px', // violet core H
+      '88px 88px', // violet bloom V
+      '88px 88px', // violet bloom H
+      '44px 44px', // teal core V
+      '44px 44px', // teal core H
+      '44px 44px', // teal bloom V
+      '44px 44px', // teal bloom H
+      '100% 100%', // vignette
+      '100% 100%', // horizon wash
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // violet core V
+      '0 0', // violet core H
+      '-3px 0', // violet bloom V
+      '0 -3px', // violet bloom H
+      '22px 22px', // teal core V
+      '22px 22px', // teal core H
+      '20px 22px', // teal bloom V
+      '22px 20px', // teal bloom H
+      '0 0', // vignette
+      '0 0', // horizon wash
+    ].join(','),
+  },
+};

src/app/features/lotus/backgrounds/plaid.ts

@@ -0,0 +1,135 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// plaid — an authentic woven tartan, muted to a heather-wool hush.
+//
+// Real tartan is not a grid of lines: it is a *sett* — a repeating sequence of
+// coloured bands of different widths — thrown in BOTH warp (vertical) and weft
+// (horizontal) directions with the SAME sequence. Where a warp band crosses a
+// weft band of the same colour the yarn density doubles and the colour visibly
+// deepens; that reinforced overlap at every crossing is exactly what makes cloth
+// read as woven rather than printed. We reproduce that physically with
+// semi-transparent bands: a vertical band at alpha a and a horizontal band at
+// alpha a stack to ~2a where they cross (over transparent to 1x elsewhere), so
+// the crossings darken on their own with no extra layer.
+//
+// THE SETT (band widths across one tile)
+// We use a few closely-related widths for a wool-flannel rhythm rather than a
+// clean check: a wide ground band, a medium companion, and a thin accent
+// over-stripe of a warmer hue (the classic single guard line). The identical
+// sequence in warp and weft yields the tartan lattice. A faint diagonal twill
+// hatch sits on top at very low alpha to suggest the 2/2 twill thread angle of
+// woven wool. A soft central wash lifts the reading zone and a gentle vignette
+// settles the corners.
+//
+// SEAMLESS TILING
+// Every band layer is a `repeating-linear-gradient` whose stop sequence is
+// expressed in px and whose period divides the tile exactly (dark tile 96px:
+// wide=48, medium=24, accent=96; light tile 88px similarly). Warp layers repeat
+// at 0deg-across (90deg gradient) and weft at 0deg, sharing one square
+// `backgroundSize`, so the sett closes on itself with no seam in either axis.
+// The twill hatch is a repeating-linear-gradient on a small square tile that
+// divides the main tile. Wash and vignette are single non-repeating gradients
+// at 100% 100%, so they never seam.
+
+const dark: CSSProperties = {
+  // Deep muted forest-charcoal ground.
+  backgroundColor: 'oklch(0.19 0.018 155)',
+  backgroundImage: [
+    // Twill hatch — whisper-faint diagonal thread angle of the weave itself.
+    'repeating-linear-gradient(45deg,' +
+      ' oklch(0.55 0.03 155 / 0.03) 0px, oklch(0.55 0.03 155 / 0.03) 1px,' +
+      ' transparent 1px, transparent 4px)',
+
+    // WEFT (horizontal bands) --------------------------------------------
+    // Wide muted-forest ground band.
+    'repeating-linear-gradient(0deg,' +
+      ' oklch(0.45 0.05 150 / 0.14) 0px, oklch(0.45 0.05 150 / 0.14) 22px,' +
+      ' transparent 22px, transparent 48px)',
+    // Medium companion band (cooler, offset into the ground gap).
+    'repeating-linear-gradient(0deg,' +
+      ' transparent 0px, transparent 60px,' +
+      ' oklch(0.42 0.035 175 / 0.11) 60px, oklch(0.42 0.035 175 / 0.11) 72px,' +
+      ' transparent 72px, transparent 96px)',
+    // Thin warm amber guard line — the single accent over-stripe.
+    'repeating-linear-gradient(0deg,' +
+      ' transparent 0px, transparent 36px,' +
+      ' oklch(0.60 0.08 40 / 0.13) 36px, oklch(0.60 0.08 40 / 0.13) 38px,' +
+      ' transparent 38px, transparent 96px)',
+
+    // WARP (vertical bands, identical sett) -------------------------------
+    'repeating-linear-gradient(90deg,' +
+      ' oklch(0.45 0.05 150 / 0.14) 0px, oklch(0.45 0.05 150 / 0.14) 22px,' +
+      ' transparent 22px, transparent 48px)',
+    'repeating-linear-gradient(90deg,' +
+      ' transparent 0px, transparent 60px,' +
+      ' oklch(0.42 0.035 175 / 0.11) 60px, oklch(0.42 0.035 175 / 0.11) 72px,' +
+      ' transparent 72px, transparent 96px)',
+    'repeating-linear-gradient(90deg,' +
+      ' transparent 0px, transparent 36px,' +
+      ' oklch(0.60 0.08 40 / 0.13) 36px, oklch(0.60 0.08 40 / 0.13) 38px,' +
+      ' transparent 38px, transparent 96px)',
+
+    // Tonal wash — soft warm-green lift through the reading centre.
+    'radial-gradient(ellipse 92% 78% at 50% 42%, oklch(0.27 0.03 150 / 0.38) 0%, transparent 62%)',
+    // Vignette — feather the corners into deeper forest-charcoal.
+    'radial-gradient(ellipse 122% 132% at 50% 45%, transparent 58%, oklch(0.14 0.016 155 / 0.55) 100%)',
+  ].join(','),
+  backgroundSize:
+    '8px 8px,' + // twill (multiple of 4px hatch period → seamless)
+    '96px 96px, 96px 96px, 96px 96px,' + // weft: wide, medium, accent
+    '96px 96px, 96px 96px, 96px 96px,' + // warp: wide, medium, accent
+    '100% 100%, 100% 100%', // wash, vignette
+};
+
+const light: CSSProperties = {
+  // Warm off-white paper ground.
+  backgroundColor: 'oklch(0.965 0.007 85)',
+  backgroundImage: [
+    // Twill hatch — faint diagonal weave angle on paper.
+    'repeating-linear-gradient(45deg,' +
+      ' oklch(0.45 0.03 250 / 0.025) 0px, oklch(0.45 0.03 250 / 0.025) 1px,' +
+      ' transparent 1px, transparent 4px)',
+
+    // WEFT (horizontal bands) --------------------------------------------
+    // Wide dusty-blue ground band.
+    'repeating-linear-gradient(0deg,' +
+      ' oklch(0.60 0.045 245 / 0.12) 0px, oklch(0.60 0.045 245 / 0.12) 20px,' +
+      ' transparent 20px, transparent 44px)',
+    // Medium greige companion band.
+    'repeating-linear-gradient(0deg,' +
+      ' transparent 0px, transparent 55px,' +
+      ' oklch(0.62 0.018 90 / 0.11) 55px, oklch(0.62 0.018 90 / 0.11) 66px,' +
+      ' transparent 66px, transparent 88px)',
+    // Thin warm sand guard line — the single accent over-stripe.
+    'repeating-linear-gradient(0deg,' +
+      ' transparent 0px, transparent 33px,' +
+      ' oklch(0.68 0.06 55 / 0.12) 33px, oklch(0.68 0.06 55 / 0.12) 35px,' +
+      ' transparent 35px, transparent 88px)',
+
+    // WARP (vertical bands, identical sett) -------------------------------
+    'repeating-linear-gradient(90deg,' +
+      ' oklch(0.60 0.045 245 / 0.12) 0px, oklch(0.60 0.045 245 / 0.12) 20px,' +
+      ' transparent 20px, transparent 44px)',
+    'repeating-linear-gradient(90deg,' +
+      ' transparent 0px, transparent 55px,' +
+      ' oklch(0.62 0.018 90 / 0.11) 55px, oklch(0.62 0.018 90 / 0.11) 66px,' +
+      ' transparent 66px, transparent 88px)',
+    'repeating-linear-gradient(90deg,' +
+      ' transparent 0px, transparent 33px,' +
+      ' oklch(0.68 0.06 55 / 0.12) 33px, oklch(0.68 0.06 55 / 0.12) 35px,' +
+      ' transparent 35px, transparent 88px)',
+
+    // Tonal wash — warm paper highlight through the reading centre.
+    'radial-gradient(ellipse 92% 78% at 50% 42%, oklch(0.99 0.008 85 / 0.55) 0%, transparent 62%)',
+    // Vignette — settle the corners into a slightly deeper dusty tone.
+    'radial-gradient(ellipse 122% 132% at 50% 45%, transparent 58%, oklch(0.90 0.014 245 / 0.40) 100%)',
+  ].join(','),
+  backgroundSize:
+    '8px 8px,' + // twill (multiple of 4px hatch period → seamless)
+    '88px 88px, 88px 88px, 88px 88px,' + // weft: wide, medium, accent
+    '88px 88px, 88px 88px, 88px 88px,' + // warp: wide, medium, accent
+    '100% 100%, 100% 100%', // wash, vignette
+};
+
+export const plaid: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/polka.ts

@@ -0,0 +1,59 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// polka — a grown-up polka dot: embossed leather / fine letterpress stationery,
+// not childish spots. Each dot is not a flat circle but a soft radial "bump":
+// an off-centre highlight fading into a faint recessed shadow, so it reads as a
+// gently raised (or debossed) node catching a single top-left light. Two subtly
+// different dot sizes are staggered on a half-tile offset for a refined,
+// hand-set rhythm, and a large single vignette gradient adds quiet depth toward
+// the edges.
+//
+// SEAMLESS TILING: both dot layers repeat on the SAME 44px cell (backgroundSize
+// 44px 44px). The larger "primary" dots sit at 0 0; the smaller "secondary"
+// dots are shifted by exactly half a tile (22px 22px) so they fall in the gaps
+// of the primary lattice — a true staggered brick layout that wraps with no
+// seam. Each radial gradient's highlight/shadow rings are fully enclosed well
+// inside its cell, so nothing is clipped at a tile boundary. The vignette is a
+// single non-repeating gradient covering the whole element ('cover').
+//
+// SUBTLETY: dot opacities live in the 0.03–0.10 range and every dot fades to
+// transparent over a soft edge (no hard rim), so the surface is felt as tactile
+// grain rather than read as dots. Crisp message text sits comfortably above it
+// in both themes (WCAG-AA safe).
+
+const dark: CSSProperties = {
+  // deep espresso base — warm, near-black brown
+  backgroundColor: 'oklch(0.19 0.018 65)',
+  backgroundImage: [
+    // vignette — corners settle darker so the field feels like supple leather
+    'radial-gradient(120% 120% at 50% 40%, oklch(0.22 0.02 65 / 0.5) 0%, oklch(0.19 0.018 65 / 0) 55%, oklch(0.15 0.015 60 / 0.55) 100%)',
+    // PRIMARY dot — larger raised pearl. Top-left warm highlight, then the body,
+    // then a whisper of shadow at the lower-right rim for embossed dimension.
+    'radial-gradient(circle at 42% 40%, oklch(0.82 0.02 80 / 0.10) 0%, oklch(0.80 0.02 80 / 0.075) 22%, oklch(0.55 0.02 70 / 0.045) 44%, oklch(0.12 0.01 60 / 0.05) 62%, transparent 72%)',
+    // SECONDARY dot — smaller, staggered into the gaps, fainter for depth layering
+    'radial-gradient(circle at 42% 40%, oklch(0.82 0.02 80 / 0.075) 0%, oklch(0.78 0.02 80 / 0.05) 26%, oklch(0.50 0.02 70 / 0.03) 52%, oklch(0.12 0.01 60 / 0.04) 70%, transparent 82%)',
+  ].join(','),
+  // primary dots ~9px, secondary ~6px, both on the same 44px lattice
+  backgroundSize: 'cover, 44px 44px, 44px 44px',
+  // secondary offset by half a tile => staggered brick lattice
+  backgroundPosition: 'center, 0 0, 22px 22px',
+};
+
+const light: CSSProperties = {
+  // cream stationery base — warm off-white paper stock
+  backgroundColor: 'oklch(0.975 0.008 85)',
+  backgroundImage: [
+    // vignette — a gentle warm settling toward the edges, like heavy cotton paper
+    'radial-gradient(120% 120% at 50% 40%, oklch(0.99 0.006 85 / 0.5) 0%, oklch(0.975 0.008 85 / 0) 55%, oklch(0.945 0.012 80 / 0.55) 100%)',
+    // PRIMARY dot — soft taupe deboss. Faint paper highlight at top-left, taupe
+    // body, then a soft shadow lower-right so each dot reads pressed into the sheet.
+    'radial-gradient(circle at 42% 40%, oklch(0.99 0.004 85 / 0.35) 0%, oklch(0.72 0.02 70 / 0.075) 30%, oklch(0.60 0.025 65 / 0.09) 50%, oklch(0.55 0.025 60 / 0.05) 66%, transparent 76%)',
+    // SECONDARY dot — smaller, staggered, lighter for a two-tier hand-set rhythm
+    'radial-gradient(circle at 42% 40%, oklch(0.99 0.004 85 / 0.28) 0%, oklch(0.74 0.02 70 / 0.05) 34%, oklch(0.62 0.025 65 / 0.06) 56%, oklch(0.56 0.025 60 / 0.035) 72%, transparent 84%)',
+  ].join(','),
+  backgroundSize: 'cover, 44px 44px, 44px 44px',
+  backgroundPosition: 'center, 0 0, 22px 22px',
+};
+
+export const polka: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/stars.ts

@@ -0,0 +1,91 @@
+import { ChatBgVariants } from './types';
+
+// stars — a deep-space starfield with subtle depth.
+//
+// Concept: three parallax layers of stars at different tile sizes and offsets
+// (so the repeat never lines up and reads as a genuine random field), lifted
+// onto a faint deep-blue->violet nebula wash for depth, and finished with a
+// gentle center vignette that keeps the reading column the calmest area of the
+// canvas. Every layer is a stacked radial-gradient — pure CSS, no assets.
+//
+// Layer stacking order (topmost first, as CSS paints image #1 on top):
+//   1. bright near stars   (crisp, sparse, largest tile)
+//   2. mid stars           (dimmer, medium tile)
+//   3. faint blue far stars (haze, smallest tile — most repeats, least visible)
+//   4. calming center vignette
+//   5. nebula wash (deep blue -> violet)
+// The three star tiles use coprime-ish sizes (137/191/233 dark) so their least
+// common repeat is enormous and no seam is perceivable.
+
+export const stars: ChatBgVariants = {
+  // Dark: bright/dim white + faint blue stars on a near-black cosmos, with a
+  // deep-blue->violet nebula and a soft vignette that darkens the calm center.
+  dark: {
+    backgroundColor: 'oklch(0.16 0.03 275)',
+    backgroundImage: [
+      // 1. bright near stars — crisp cool-white, sparse
+      'radial-gradient(circle at center, oklch(0.98 0.01 260 / 0.85) 0.6px, transparent 1.4px)',
+      // 2. mid stars — softer, more of them
+      'radial-gradient(circle at center, oklch(0.92 0.02 265 / 0.55) 0.6px, transparent 1.3px)',
+      // 3. faint blue far dust — the parallax haze
+      'radial-gradient(circle at center, oklch(0.80 0.06 255 / 0.30) 0.5px, transparent 1.1px)',
+      // 4. center vignette — keeps the reading column calmest
+      'radial-gradient(ellipse 120% 90% at 50% 42%, transparent 42%, oklch(0.10 0.03 270 / 0.55) 100%)',
+      // 5. nebula wash — deep blue -> violet drift
+      'radial-gradient(ellipse 140% 120% at 78% 12%, oklch(0.25 0.08 280 / 0.55) 0%, transparent 55%)',
+      'radial-gradient(ellipse 130% 110% at 18% 92%, oklch(0.20 0.06 250 / 0.50) 0%, transparent 58%)',
+    ].join(','),
+    backgroundSize: [
+      '137px 137px', // near stars
+      '191px 191px', // mid stars
+      '233px 233px', // far dust
+      '100% 100%', // vignette
+      '100% 100%', // nebula A
+      '100% 100%', // nebula B
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // near
+      '61px 43px', // mid  (offset breaks alignment)
+      '113px 97px', // far  (offset again)
+      '0 0', // vignette
+      '0 0', // nebula A
+      '0 0', // nebula B
+    ].join(','),
+  },
+
+  // Light: an airy pre-dawn sky. No literal white stars on white — instead very
+  // soft pale sparkles paired with the faintest cool-grey speckles, floated on a
+  // gentle cool gradient. Reads as elegant atmosphere, never as noise over text.
+  light: {
+    backgroundColor: 'oklch(0.965 0.008 255)',
+    backgroundImage: [
+      // 1. pale warm pre-dawn sparkles — a hair brighter than the sky
+      'radial-gradient(circle at center, oklch(0.995 0.015 90 / 0.55) 0.6px, transparent 1.4px)',
+      // 2. tiny cool speckles — the merest hint of darkness for texture/contrast
+      'radial-gradient(circle at center, oklch(0.62 0.05 260 / 0.16) 0.5px, transparent 1.2px)',
+      // 3. faint far dust — very soft, most-repeated layer
+      'radial-gradient(circle at center, oklch(0.70 0.04 255 / 0.12) 0.5px, transparent 1.1px)',
+      // 4. center vignette — brightens the calm reading center slightly
+      'radial-gradient(ellipse 120% 90% at 50% 44%, oklch(1 0 0 / 0.45) 30%, transparent 100%)',
+      // 5. pre-dawn wash — cool blue high, warm blush low
+      'radial-gradient(ellipse 150% 120% at 80% 8%, oklch(0.90 0.05 255 / 0.60) 0%, transparent 60%)',
+      'radial-gradient(ellipse 140% 120% at 15% 95%, oklch(0.93 0.04 40 / 0.45) 0%, transparent 62%)',
+    ].join(','),
+    backgroundSize: [
+      '149px 149px', // sparkles
+      '199px 199px', // speckles
+      '251px 251px', // far dust
+      '100% 100%', // vignette
+      '100% 100%', // wash A
+      '100% 100%', // wash B
+    ].join(','),
+    backgroundPosition: [
+      '0 0', // sparkles
+      '71px 53px', // speckles
+      '127px 109px', // far dust
+      '0 0', // vignette
+      '0 0', // wash A
+      '0 0', // wash B
+    ].join(','),
+  },
+};

src/app/features/lotus/backgrounds/tactical.ts

@@ -0,0 +1,93 @@
+import { ChatBgVariants } from './types';
+
+// tactical — a military tactical display / recon coordinate grid (MGRS-style).
+//
+// The motif is a fine grid nested inside bold sector squares, with a reticle
+// crosshair (arms + ring) at every sector intersection, small stencil corner
+// brackets inside each sector, and coordinate tick-marks along the sector edges
+// — a convincing mil-spec map overlay rather than a plain dot grid.
+//
+// Layers (painted top-to-bottom):
+//   1. SVG reticle/stencil tile (128px). Corner arms + quarter-ring arcs radiate
+//      from each of the four tile corners, so four neighbouring tiles combine
+//      into ONE full crosshair "+" with a full ring at every sector intersection.
+//      The tile also carries L-shaped stencil brackets, edge coordinate ticks and
+//      a micro centre reticle. Because every mark is anchored to the 128px tile
+//      lattice, it stays phase-locked to the grids below — no seams, no drift.
+//   2. Sector lines (heavier)                — 128px.
+//   3. Fine recon grid (fainter)             — 16px  (128 = 8 × 16, so it nests
+//      exactly inside every sector with no beat/moiré).
+//   4. A soft scan vignette that keeps the CENTRE calm and clear for text while
+//      letting the grid fall away slightly toward the edges — dimension without
+//      contrast.
+//
+// All strokes sit at low alpha (~0.03–0.30 on 1px marks) so the display is felt,
+// not read: crisp message text stays comfortably WCAG-AA legible in both themes.
+// A single shared top-left (0 0) origin keeps the reticle tile, the 128px sector
+// grid and the 16px fine grid all in phase.
+
+const DARK_RETICLE =
+  'url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22128%22%20height%3D%22128%22%3E%3Cg%20stroke%3D%22oklch%280.72%200.13%2085%20%2F%200.30%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M0%200%20H14%20M0%200%20V14%22%2F%3E%3Cpath%20d%3D%22M128%200%20H114%20M128%200%20V14%22%2F%3E%3Cpath%20d%3D%22M0%20128%20H14%20M0%20128%20V114%22%2F%3E%3Cpath%20d%3D%22M128%20128%20H114%20M128%20128%20V114%22%2F%3E%3Ccircle%20cx%3D%220%22%20cy%3D%220%22%20r%3D%226%22%2F%3E%3Ccircle%20cx%3D%22128%22%20cy%3D%220%22%20r%3D%226%22%2F%3E%3Ccircle%20cx%3D%220%22%20cy%3D%22128%22%20r%3D%226%22%2F%3E%3Ccircle%20cx%3D%22128%22%20cy%3D%22128%22%20r%3D%226%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.72%200.10%2095%20%2F%200.22%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M10%2020%20V10%20H20%22%2F%3E%3Cpath%20d%3D%22M118%2020%20V10%20H108%22%2F%3E%3Cpath%20d%3D%22M10%20108%20V118%20H20%22%2F%3E%3Cpath%20d%3D%22M118%20108%20V118%20H108%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.72%200.10%2095%20%2F%200.22%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M64%200%20V6%20M64%20128%20V122%20M0%2064%20H6%20M128%2064%20H122%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.72%200.13%2085%20%2F%200.30%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M64%2058%20V70%20M58%2064%20H70%22%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E")';
+
+const LIGHT_RETICLE =
+  'url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22128%22%20height%3D%22128%22%3E%3Cg%20stroke%3D%22oklch%280.45%200.07%20120%20%2F%200.40%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M0%200%20H14%20M0%200%20V14%22%2F%3E%3Cpath%20d%3D%22M128%200%20H114%20M128%200%20V14%22%2F%3E%3Cpath%20d%3D%22M0%20128%20H14%20M0%20128%20V114%22%2F%3E%3Cpath%20d%3D%22M128%20128%20H114%20M128%20128%20V114%22%2F%3E%3Ccircle%20cx%3D%220%22%20cy%3D%220%22%20r%3D%226%22%2F%3E%3Ccircle%20cx%3D%22128%22%20cy%3D%220%22%20r%3D%226%22%2F%3E%3Ccircle%20cx%3D%220%22%20cy%3D%22128%22%20r%3D%226%22%2F%3E%3Ccircle%20cx%3D%22128%22%20cy%3D%22128%22%20r%3D%226%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.42%200.05%20130%20%2F%200.28%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M10%2020%20V10%20H20%22%2F%3E%3Cpath%20d%3D%22M118%2020%20V10%20H108%22%2F%3E%3Cpath%20d%3D%22M10%20108%20V118%20H20%22%2F%3E%3Cpath%20d%3D%22M118%20108%20V118%20H108%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.42%200.05%20130%20%2F%200.28%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M64%200%20V6%20M64%20128%20V122%20M0%2064%20H6%20M128%2064%20H122%22%2F%3E%3C%2Fg%3E%3Cg%20stroke%3D%22oklch%280.45%200.07%20120%20%2F%200.40%29%22%20stroke-width%3D%221%22%20fill%3D%22none%22%3E%3Cpath%20d%3D%22M64%2058%20V70%20M58%2064%20H70%22%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E")';
+
+export const tactical: ChatBgVariants = {
+  // Phosphor amber/olive lines glowing on a near-black recon display.
+  dark: {
+    backgroundColor: 'oklch(0.17 0.012 95)',
+    backgroundImage: [
+      // 1. reticles + stencil brackets + coordinate ticks
+      DARK_RETICLE,
+      // 4. scan vignette: keeps the centre calm, eases grid contrast at edges.
+      'radial-gradient(135% 120% at 50% 46%, transparent 52%, oklch(0.11 0.01 100 / 0.55) 100%)',
+      // a faint phosphor bloom drifting off the top so the black isn't dead flat.
+      'radial-gradient(120% 90% at 50% 0%, oklch(0.24 0.03 90 / 0.45) 0%, transparent 60%)',
+      // 2. sector lines (heavier)
+      'linear-gradient(oklch(0.72 0.13 85 / 0.11) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.72 0.13 85 / 0.11) 1px, transparent 1px)',
+      // 3. fine recon grid (fainter)
+      'linear-gradient(oklch(0.72 0.11 90 / 0.045) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.72 0.11 90 / 0.045) 1px, transparent 1px)',
+    ].join(','),
+    backgroundSize: [
+      '128px 128px', // reticle tile
+      '100% 100%', // vignette
+      '100% 100%', // phosphor bloom
+      '128px 128px', // sector V
+      '128px 128px', // sector H
+      '16px 16px', // fine V
+      '16px 16px', // fine H
+    ].join(','),
+    // Shared top-left origin: reticle tile + 128px sector grid + 16px fine grid
+    // (128 = 8 × 16) stay phase-locked, so corner arms land on sector crossings.
+  },
+
+  // Olive-graphite recon grid printed on cool tactical paper.
+  light: {
+    backgroundColor: 'oklch(0.95 0.008 120)',
+    backgroundImage: [
+      LIGHT_RETICLE,
+      // scan vignette: gentle cool shading into the corners, calm centre.
+      'radial-gradient(135% 120% at 50% 46%, transparent 56%, oklch(0.86 0.02 125 / 0.5) 100%)',
+      // paper sheen toward the top so the surface reads like a printed sheet.
+      'radial-gradient(120% 90% at 50% 0%, oklch(0.98 0.006 120 / 0.7) 0%, transparent 60%)',
+      // sector lines (heavier)
+      'linear-gradient(oklch(0.45 0.07 120 / 0.14) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.45 0.07 120 / 0.14) 1px, transparent 1px)',
+      // fine recon grid (fainter)
+      'linear-gradient(oklch(0.45 0.06 125 / 0.055) 1px, transparent 1px)',
+      'linear-gradient(90deg, oklch(0.45 0.06 125 / 0.055) 1px, transparent 1px)',
+    ].join(','),
+    backgroundSize: [
+      '128px 128px',
+      '100% 100%',
+      '100% 100%',
+      '128px 128px',
+      '128px 128px',
+      '16px 16px',
+      '16px 16px',
+    ].join(','),
+    // Shared top-left origin keeps the reticle tile and both grids phase-locked.
+  },
+};

src/app/features/lotus/backgrounds/topographic.ts

@@ -0,0 +1,73 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// topographic — an elegant contour / elevation map.
+//
+// The motif is a delicate cartographic contour survey: nested rings suggest two
+// gentle "peaks" and a shallow "valley", drawn with occasional heavier "index
+// contour" lines for authenticity, all floating over a soft tonal wash. It is
+// tuned to be *felt, not read* — line opacities sit well under legibility
+// thresholds so crisp message text stays comfortably WCAG-AA in both themes.
+//
+// SEAMLESS TILING
+// Each contour system is a `repeating-radial-gradient` whose ring period P is a
+// clean divisor of its `backgroundSize` tile. A repeating-radial-gradient tiles
+// seamlessly only when the tile edge falls on a whole number of ring periods, so
+// every layer below uses tile = N * P. Peak A's fine (32px) and index (128px)
+// layers share one 256px tile (256 = 8*32 = 2*128) AND one center, so the heavy
+// index lines land exactly on every 4th fine ring — a true index contour, never
+// drifting out of register. Peak B tiles 288 = 12*24; the valley tiles 384 =
+// 8*48. The tonal washes/vignette are single non-repeating gradients sized to
+// the same tiles, so nothing shows a visible seam.
+
+const dark: CSSProperties = {
+  backgroundColor: 'oklch(0.205 0.018 235)',
+  backgroundImage: [
+    // Peak A — fine contour lines (soft teal), 32px period.
+    'repeating-radial-gradient(circle at 27% 34%, transparent 0, transparent 26px,' +
+      ' oklch(0.62 0.055 190 / 0.09) 27px, oklch(0.62 0.055 190 / 0.09) 28px, transparent 29px, transparent 32px)',
+    // Peak A — index (heavier) contour every 4th ring, 128px period.
+    'repeating-radial-gradient(circle at 27% 34%, transparent 0, transparent 122px,' +
+      ' oklch(0.66 0.06 190 / 0.10) 123px, oklch(0.66 0.06 190 / 0.10) 125px, transparent 126px, transparent 128px)',
+    // Peak B — fine contour lines (cooler sage-teal), 24px period.
+    'repeating-radial-gradient(circle at 78% 72%, transparent 0, transparent 19px,' +
+      ' oklch(0.60 0.05 200 / 0.07) 20px, oklch(0.60 0.05 200 / 0.07) 21px, transparent 22px, transparent 24px)',
+    // Valley — broad shallow rings (very faint), 48px period.
+    'repeating-radial-gradient(circle at 52% 8%, transparent 0, transparent 42px,' +
+      ' oklch(0.58 0.045 195 / 0.05) 43px, oklch(0.58 0.045 195 / 0.05) 44px, transparent 45px, transparent 48px)',
+    // Tonal wash — lifts the "peaks", sinks the corners for depth.
+    'radial-gradient(circle at 27% 34%, oklch(0.26 0.03 200 / 0.55) 0%, transparent 46%)',
+    'radial-gradient(circle at 78% 72%, oklch(0.24 0.028 205 / 0.45) 0%, transparent 44%)',
+    // Vignette — soft edge darkening keeps the field calm behind text.
+    'radial-gradient(ellipse 120% 130% at 50% 42%, transparent 58%, oklch(0.15 0.02 235 / 0.55) 100%)',
+  ].join(','),
+  backgroundSize:
+    '256px 256px, 256px 256px, 288px 288px, 384px 384px, 100% 100%, 100% 100%, 100% 100%',
+};
+
+const light: CSSProperties = {
+  backgroundColor: 'oklch(0.965 0.008 85)',
+  backgroundImage: [
+    // Peak A — fine contour lines (warm graphite/sand), 32px period.
+    'repeating-radial-gradient(circle at 27% 34%, transparent 0, transparent 26px,' +
+      ' oklch(0.45 0.03 70 / 0.08) 27px, oklch(0.45 0.03 70 / 0.08) 28px, transparent 29px, transparent 32px)',
+    // Peak A — index (heavier) contour every 4th ring, 128px period.
+    'repeating-radial-gradient(circle at 27% 34%, transparent 0, transparent 122px,' +
+      ' oklch(0.40 0.035 68 / 0.10) 123px, oklch(0.40 0.035 68 / 0.10) 125px, transparent 126px, transparent 128px)',
+    // Peak B — fine contour lines (soft sage-graphite), 24px period.
+    'repeating-radial-gradient(circle at 78% 72%, transparent 0, transparent 19px,' +
+      ' oklch(0.47 0.028 120 / 0.06) 20px, oklch(0.47 0.028 120 / 0.06) 21px, transparent 22px, transparent 24px)',
+    // Valley — broad shallow rings (very faint), 48px period.
+    'repeating-radial-gradient(circle at 52% 8%, transparent 0, transparent 42px,' +
+      ' oklch(0.46 0.025 75 / 0.045) 43px, oklch(0.46 0.025 75 / 0.045) 44px, transparent 45px, transparent 48px)',
+    // Tonal wash — warm paper highlights over the "peaks".
+    'radial-gradient(circle at 27% 34%, oklch(0.985 0.012 85 / 0.60) 0%, transparent 46%)',
+    'radial-gradient(circle at 78% 72%, oklch(0.945 0.014 95 / 0.45) 0%, transparent 44%)',
+    // Vignette — feather the edges to a slightly deeper sand for depth.
+    'radial-gradient(ellipse 120% 130% at 50% 42%, transparent 58%, oklch(0.90 0.016 80 / 0.45) 100%)',
+  ].join(','),
+  backgroundSize:
+    '256px 256px, 256px 256px, 288px 288px, 384px 384px, 100% 100%, 100% 100%, 100% 100%',
+};
+
+export const topographic: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/triangles.ts

@@ -0,0 +1,103 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// triangles — elegant low-poly / faceted-crystal mesh.
+//
+// The motif stays true to its name — a triangular tessellation — but is rebuilt
+// to read as a *faceted crystalline surface* rather than the old flat isometric
+// lines. Neighbouring triangular facets carry barely-there tonal shifts (one
+// face catches a whisper of light, the adjacent one falls into a whisper of
+// shade) so the plane looks gently faceted and dimensional, like brushed slate
+// or cut glass seen at a shallow angle. A hairline "mesh glint" traces the facet
+// edges so the crystalline structure is felt, never read. A soft tonal wash and
+// a feathered vignette give the whole field quiet architectural depth.
+//
+// FACET SHADING
+// An isometric triangle grid is three families of parallel lines at 0deg, 60deg
+// and 120deg. Each `linear-gradient` below is a *hard-edged* two-band ramp along
+// one of those axes: a faint tonal band followed by transparent, repeating
+// across the tile. Overlapping the three axes partitions the plane into small
+// triangular cells; because each axis contributes its shade to a different set
+// of cells, up-pointing and down-pointing facets end up carrying subtly
+// different summed tones — the alternating light/shadow facet look. A separate
+// hairline layer per axis draws the thin edge glint at the facet borders.
+//
+// SEAMLESS TILING
+// Equilateral geometry needs the tile height to be the width times sqrt(3). We
+// use a 48x83px tile (48 * 1.732 = 83.1, rounded to 83) so the 60deg/120deg
+// ramps close exactly on the tile box, and the horizontal edge family repeats on
+// half-height (48x41.5 -> the 0deg hairline is sized to the full tile so its
+// bands land on tile edges). Every facet-shade and edge layer shares this tile
+// (or an exact multiple), and the 60/120 layers meet at the tile's mid columns,
+// so triangles interlock across every seam with no drift. Wash and vignette are
+// single non-repeating gradients at 100% 100%, so they never seam.
+
+const dark: CSSProperties = {
+  // Deep navy base — the crystal sits on cool night stone.
+  backgroundColor: 'oklch(0.19 0.028 258)',
+  backgroundImage: [
+    // --- Facet shading: three cool-slate tonal ramps, one per triangle axis.
+    // Ascending-diagonal facets — a soft light band on one face family.
+    'linear-gradient(60deg,' +
+      ' oklch(0.46 0.03 250 / 0.07) 0%, oklch(0.46 0.03 250 / 0.07) 50%,' +
+      ' transparent 50%, transparent 100%)',
+    // Descending-diagonal facets — the shade family, closing the triangles.
+    'linear-gradient(120deg,' +
+      ' oklch(0.34 0.03 255 / 0.06) 0%, oklch(0.34 0.03 255 / 0.06) 50%,' +
+      ' transparent 50%, transparent 100%)',
+    // Horizontal facets — a third, fainter slate band so cells read three-sided.
+    'linear-gradient(0deg,' +
+      ' oklch(0.42 0.028 248 / 0.045) 0%, oklch(0.42 0.028 248 / 0.045) 50%,' +
+      ' transparent 50%, transparent 100%)',
+    // --- Mesh glint: hairline edges tracing the crystalline facet borders.
+    'linear-gradient(60deg, transparent 0, transparent calc(50% - 0.5px),' +
+      ' oklch(0.62 0.035 250 / 0.10) calc(50% - 0.5px), oklch(0.62 0.035 250 / 0.10) 50%,' +
+      ' transparent 50%)',
+    'linear-gradient(120deg, transparent 0, transparent calc(50% - 0.5px),' +
+      ' oklch(0.62 0.035 250 / 0.10) calc(50% - 0.5px), oklch(0.62 0.035 250 / 0.10) 50%,' +
+      ' transparent 50%)',
+    // --- Tonal wash — a gentle cool lift through the reading centre for depth.
+    'radial-gradient(ellipse 95% 80% at 50% 40%, oklch(0.28 0.03 255 / 0.45) 0%, transparent 62%)',
+    // --- Vignette — feather the corners into deeper navy.
+    'radial-gradient(ellipse 125% 130% at 50% 45%, transparent 58%, oklch(0.13 0.022 258 / 0.55) 100%)',
+  ].join(','),
+  backgroundSize: '48px 83px, 48px 83px, 48px 83px, 48px 83px, 48px 83px, 100% 100%, 100% 100%',
+  // Offset the 120deg (shade) and its glint by half a tile so up/down facets
+  // interlock — this is what alternates the light/shadow triangles.
+  backgroundPosition: '0 0, 24px 0, 0 0, 0 0, 24px 0, 0 0, 0 0',
+};
+
+const light: CSSProperties = {
+  // Pale ice-white base — cut glass on frosted paper.
+  backgroundColor: 'oklch(0.975 0.004 250)',
+  backgroundImage: [
+    // --- Facet shading: soft cool-grey tonal ramps, one per triangle axis.
+    // Ascending-diagonal facets — a barely-there shade on one face family.
+    'linear-gradient(60deg,' +
+      ' oklch(0.66 0.022 252 / 0.09) 0%, oklch(0.66 0.022 252 / 0.09) 50%,' +
+      ' transparent 50%, transparent 100%)',
+    // Descending-diagonal facets — a hair darker, closing the triangles.
+    'linear-gradient(120deg,' +
+      ' oklch(0.58 0.024 255 / 0.08) 0%, oklch(0.58 0.024 255 / 0.08) 50%,' +
+      ' transparent 50%, transparent 100%)',
+    // Horizontal facets — the third, faintest cool-grey band.
+    'linear-gradient(0deg,' +
+      ' oklch(0.62 0.02 250 / 0.055) 0%, oklch(0.62 0.02 250 / 0.055) 50%,' +
+      ' transparent 50%, transparent 100%)',
+    // --- Mesh glint: crisp hairline facet edges in cool slate.
+    'linear-gradient(60deg, transparent 0, transparent calc(50% - 0.5px),' +
+      ' oklch(0.50 0.03 255 / 0.11) calc(50% - 0.5px), oklch(0.50 0.03 255 / 0.11) 50%,' +
+      ' transparent 50%)',
+    'linear-gradient(120deg, transparent 0, transparent calc(50% - 0.5px),' +
+      ' oklch(0.50 0.03 255 / 0.11) calc(50% - 0.5px), oklch(0.50 0.03 255 / 0.11) 50%,' +
+      ' transparent 50%)',
+    // --- Tonal wash — a clean white highlight through the reading centre.
+    'radial-gradient(ellipse 95% 80% at 50% 40%, oklch(0.995 0.003 250 / 0.60) 0%, transparent 62%)',
+    // --- Vignette — settle the corners into a faint cool grey.
+    'radial-gradient(ellipse 125% 130% at 50% 45%, transparent 58%, oklch(0.90 0.012 252 / 0.42) 100%)',
+  ].join(','),
+  backgroundSize: '48px 83px, 48px 83px, 48px 83px, 48px 83px, 48px 83px, 100% 100%, 100% 100%',
+  backgroundPosition: '0 0, 24px 0, 0 0, 0 0, 24px 0, 0 0, 0 0',
+};
+
+export const triangles: ChatBgVariants = { dark, light };

src/app/features/lotus/backgrounds/types.ts

@@ -0,0 +1,13 @@
+import { CSSProperties } from 'react';
+
+// A chat background provides an independently-tuned CSSProperties per app theme:
+// the `dark` variant is a subtle light-ish pattern on a dark base, the `light`
+// variant a subtle dark-ish pattern on a light base. Each sits DIRECTLY behind
+// the chat message list, so both must stay subtle enough to preserve WCAG-AA
+// text legibility. Animated backgrounds include an `animation`; getChatBg strips
+// it for prefers-reduced-motion / pause-animations, so the remaining properties
+// must already read as a finished static background on their own.
+export type ChatBgVariants = {
+  dark: CSSProperties;
+  light: CSSProperties;
+};

src/app/features/lotus/backgrounds/waves.ts

@@ -0,0 +1,68 @@
+import { CSSProperties } from 'react';
+import { ChatBgVariants } from './types';
+
+// waves — a serene, rhythmic ocean swell / sound-wave contour.
+//
+// The motif is three stacked sine contours — layered swell at slightly varied
+// amplitude, weight and opacity — floating over a soft vertical depth wash so
+// the field reads like gentle water or sculpted sand. It is tuned to be *felt,
+// not read*: every stroke sits well under legibility thresholds so crisp
+// message text stays comfortably WCAG-AA in both themes.
+//
+// TRUE SINE CURVES VIA INLINE SVG
+// Gradients can't draw a real sine, so each wave is a polyline sampling of
+// y = yc - amp*sin(2*pi*N*x/W), rendered as an inline SVG data-URI (fully
+// URL-encoded, so it is CSP/Tauri-safe and needs no external asset). oklch()
+// stroke colors give perceptually even, low-chroma lines.
+//
+// SEAMLESS TILING
+// The SVG tile is 240x120 with EXACTLY N=2 whole periods across its 240px
+// width, so the first and last sample of every wave share the same y — the
+// horizontal repeat has no seam. All three contours live within y = 24..106,
+// clear of the 0/120 tile edges, so the vertical repeat is seam-free too. To
+// avoid a rigid stacked look, the same tile is layered a second time shifted by
+// half a tile (120px x, 60px y) at lower opacity, weaving the rows into a
+// continuous drifting swell. backgroundSize = 240px 120px keeps the SVG at its
+// authored scale; the depth wash is a single 100% gradient sized to match.
+
+const waveTileDark =
+  'url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22240%22%20height%3D%22120%22%20viewBox%3D%220%200%20240%20120%22%3E%3Cg%20fill%3D%22none%22%20stroke-linecap%3D%22round%22%3E%3Cpath%20d%3D%22M0%2034%20L5%2031.41%20L10%2029%20L15%2026.93%20L20%2025.34%20L25%2024.34%20L30%2024%20L35%2024.34%20L40%2025.34%20L45%2026.93%20L50%2029%20L55%2031.41%20L60%2034%20L65%2036.59%20L70%2039%20L75%2041.07%20L80%2042.66%20L85%2043.66%20L90%2044%20L95%2043.66%20L100%2042.66%20L105%2041.07%20L110%2039%20L115%2036.59%20L120%2034%20L125%2031.41%20L130%2029%20L135%2026.93%20L140%2025.34%20L145%2024.34%20L150%2024%20L155%2024.34%20L160%2025.34%20L165%2026.93%20L170%2029%20L175%2031.41%20L180%2034%20L185%2036.59%20L190%2039%20L195%2041.07%20L200%2042.66%20L205%2043.66%20L210%2044%20L215%2043.66%20L220%2042.66%20L225%2041.07%20L230%2039%20L235%2036.59%20L240%2034%22%20stroke%3D%22oklch(0.65%200.08%20200%20%2F%200.16)%22%20stroke-width%3D%221.5%22%2F%3E%3Cpath%20d%3D%22M0%2064%20L5%2062.19%20L10%2060.5%20L15%2059.05%20L20%2057.94%20L25%2057.24%20L30%2057%20L35%2057.24%20L40%2057.94%20L45%2059.05%20L50%2060.5%20L55%2062.19%20L60%2064%20L65%2065.81%20L70%2067.5%20L75%2068.95%20L80%2070.06%20L85%2070.76%20L90%2071%20L95%2070.76%20L100%2070.06%20L105%2068.95%20L110%2067.5%20L115%2065.81%20L120%2064%20L125%2062.19%20L130%2060.5%20L135%2059.05%20L140%2057.94%20L145%2057.24%20L150%2057%20L155%2057.24%20L160%2057.94%20L165%2059.05%20L170%2060.5%20L175%2062.19%20L180%2064%20L185%2065.81%20L190%2067.5%20L195%2068.95%20L200%2070.06%20L205%2070.76%20L210%2071%20L215%2070.76%20L220%2070.06%20L225%2068.95%20L230%2067.5%20L235%2065.81%20L240%2064%22%20stroke%3D%22oklch(0.68%200.07%20195%20%2F%200.11)%22%20stroke-width%3D%221.2%22%2F%3E%3Cpath%20d%3D%22M0%2094%20L5%2090.89%20L10%2088%20L15%2085.51%20L20%2083.61%20L25%2082.41%20L30%2082%20L35%2082.41%20L40%2083.61%20L45%2085.51%20L50%2088%20L55%2090.89%20L60%2094%20L65%2097.11%20L70%20100%20L75%20102.49%20L80%20104.39%20L85%20105.59%20L90%20106%20L95%20105.59%20L100%20104.39%20L105%20102.49%20L110%20100%20L115%2097.11%20L120%2094%20L125%2090.89%20L130%2088%20L135%2085.51%20L140%2083.61%20L145%2082.41%20L150%2082%20L155%2082.41%20L160%2083.61%20L165%2085.51%20L170%2088%20L175%2090.89%20L180%2094%20L185%2097.11%20L190%20100%20L195%20102.49%20L200%20104.39%20L205%20105.59%20L210%20106%20L215%20105.59%20L220%20104.39%20L225%20102.49%20L230%20100%20L235%2097.11%20L240%2094%22%20stroke%3D%22oklch(0.62%200.075%20205%20%2F%200.14)%22%20stroke-width%3D%221.6%22%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E")';
+
+const waveTileLight =
+  'url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22240%22%20height%3D%22120%22%20viewBox%3D%220%200%20240%20120%22%3E%3Cg%20fill%3D%22none%22%20stroke-linecap%3D%22round%22%3E%3Cpath%20d%3D%22M0%2034%20L5%2031.41%20L10%2029%20L15%2026.93%20L20%2025.34%20L25%2024.34%20L30%2024%20L35%2024.34%20L40%2025.34%20L45%2026.93%20L50%2029%20L55%2031.41%20L60%2034%20L65%2036.59%20L70%2039%20L75%2041.07%20L80%2042.66%20L85%2043.66%20L90%2044%20L95%2043.66%20L100%2042.66%20L105%2041.07%20L110%2039%20L115%2036.59%20L120%2034%20L125%2031.41%20L130%2029%20L135%2026.93%20L140%2025.34%20L145%2024.34%20L150%2024%20L155%2024.34%20L160%2025.34%20L165%2026.93%20L170%2029%20L175%2031.41%20L180%2034%20L185%2036.59%20L190%2039%20L195%2041.07%20L200%2042.66%20L205%2043.66%20L210%2044%20L215%2043.66%20L220%2042.66%20L225%2041.07%20L230%2039%20L235%2036.59%20L240%2034%22%20stroke%3D%22oklch(0.62%200.045%20235%20%2F%200.16)%22%20stroke-width%3D%221.5%22%2F%3E%3Cpath%20d%3D%22M0%2064%20L5%2062.19%20L10%2060.5%20L15%2059.05%20L20%2057.94%20L25%2057.24%20L30%2057%20L35%2057.24%20L40%2057.94%20L45%2059.05%20L50%2060.5%20L55%2062.19%20L60%2064%20L65%2065.81%20L70%2067.5%20L75%2068.95%20L80%2070.06%20L85%2070.76%20L90%2071%20L95%2070.76%20L100%2070.06%20L105%2068.95%20L110%2067.5%20L115%2065.81%20L120%2064%20L125%2062.19%20L130%2060.5%20L135%2059.05%20L140%2057.94%20L145%2057.24%20L150%2057%20L155%2057.24%20L160%2057.94%20L165%2059.05%20L170%2060.5%20L175%2062.19%20L180%2064%20L185%2065.81%20L190%2067.5%20L195%2068.95%20L200%2070.06%20L205%2070.76%20L210%2071%20L215%2070.76%20L220%2070.06%20L225%2068.95%20L230%2067.5%20L235%2065.81%20L240%2064%22%20stroke%3D%22oklch(0.66%200.04%20240%20%2F%200.11)%22%20stroke-width%3D%221.2%22%2F%3E%3Cpath%20d%3D%22M0%2094%20L5%2090.89%20L10%2088%20L15%2085.51%20L20%2083.61%20L25%2082.41%20L30%2082%20L35%2082.41%20L40%2083.61%20L45%2085.51%20L50%2088%20L55%2090.89%20L60%2094%20L65%2097.11%20L70%20100%20L75%20102.49%20L80%20104.39%20L85%20105.59%20L90%20106%20L95%20105.59%20L100%20104.39%20L105%20102.49%20L110%20100%20L115%2097.11%20L120%2094%20L125%2090.89%20L130%2088%20L135%2085.51%20L140%2083.61%20L145%2082.41%20L150%2082%20L155%2082.41%20L160%2083.61%20L165%2085.51%20L170%2088%20L175%2090.89%20L180%2094%20L185%2097.11%20L190%20100%20L195%20102.49%20L200%20104.39%20L205%20105.59%20L210%20106%20L215%20105.59%20L220%20104.39%20L225%20102.49%20L230%20100%20L235%2097.11%20L240%2094%22%20stroke%3D%22oklch(0.60%200.05%20230%20%2F%200.14)%22%20stroke-width%3D%221.6%22%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E")';
+
+const dark: CSSProperties = {
+  // Deep ink-blue base — the "water" the swell floats on.
+  backgroundColor: 'oklch(0.19 0.03 245)',
+  backgroundImage: [
+    // Primary swell — teal/aqua sine contours.
+    waveTileDark,
+    // Offset echo — same tile shifted half a period, dimmed, to weave rows.
+    waveTileDark,
+    // Depth wash — subtle lift toward the top, sink toward the bottom.
+    'linear-gradient(180deg, oklch(0.24 0.04 240 / 0.5) 0%, oklch(0.16 0.025 250 / 0.5) 100%)',
+  ].join(','),
+  backgroundSize: '240px 120px, 240px 120px, 100% 100%',
+  backgroundPosition: '0 0, 120px 60px, 0 0',
+  // Dim the offset echo layer relative to the primary swell.
+  backgroundBlendMode: 'normal, soft-light, normal',
+};
+
+const light: CSSProperties = {
+  // Soft warm white base — like sunlit paper or pale sand.
+  backgroundColor: 'oklch(0.975 0.006 240)',
+  backgroundImage: [
+    // Primary swell — pale blue-grey sine contours.
+    waveTileLight,
+    // Offset echo — same tile shifted half a period, dimmed, to weave rows.
+    waveTileLight,
+    // Depth wash — faint cool tint feathering toward the bottom for calm depth.
+    'linear-gradient(180deg, oklch(0.99 0.004 240 / 0.5) 0%, oklch(0.95 0.01 245 / 0.5) 100%)',
+  ].join(','),
+  backgroundSize: '240px 120px, 240px 120px, 100% 100%',
+  backgroundPosition: '0 0, 120px 60px, 0 0',
+  // Dim the offset echo layer relative to the primary swell.
+  backgroundBlendMode: 'normal, multiply, normal',
+};
+
+export const waves: ChatBgVariants = { dark, light };

src/app/features/lotus/chatBackground.ts

@@ -1,12 +1,24 @@
 import { CSSProperties } from 'react';
 import { ChatBackground } from '../../state/settings';
-import {
+import { blueprint } from './backgrounds/blueprint';
-  animRainKeyframe,
+import { stars } from './backgrounds/stars';
-  animStarsDriftKeyframe,
+import { topographic } from './backgrounds/topographic';
-  animGridPulseKeyframe,
+import { herringbone } from './backgrounds/herringbone';
-  animAuroraKeyframe,
+import { crosshatch } from './backgrounds/crosshatch';
-  animFirefliesKeyframe,
+import { chevron } from './backgrounds/chevron';
-} from '../../styles/Animations.css';
+import { polka } from './backgrounds/polka';
+import { triangles } from './backgrounds/triangles';
+import { plaid } from './backgrounds/plaid';
+import { tactical } from './backgrounds/tactical';
+import { circuit } from './backgrounds/circuit';
+import { hexgrid } from './backgrounds/hexgrid';
+import { waves } from './backgrounds/waves';
+import { neon } from './backgrounds/neon';
+import { animRain } from './backgrounds/animRain';
+import { animStars } from './backgrounds/animStars';
+import { animPulse } from './backgrounds/animPulse';
+import { animAurora } from './backgrounds/animAurora';
+import { animFireflies } from './backgrounds/animFireflies';
 
 export const BG_OPTIONS: { value: ChatBackground; label: string }[] = [
   { value: 'none', label: 'None' },
@@ -33,20 +45,14 @@ export const BG_OPTIONS: { value: ChatBackground; label: string }[] = [
   { value: 'anim-fireflies', label: 'Fireflies' },
 ];
 
+// `none`, `carbon` and `aurora` stay inline: carbon + aurora are the kept user
+// favorites, none is the empty layer. Every other background is a premium
+// per-pattern module under ./backgrounds/ (each exposes a `dark` + `light`
+// variant). Keeping the whole record here lets getChatBg stay the single entry
+// point and preserves the Record<ChatBackground, ...> exhaustiveness check.
 const DARK: Record<ChatBackground, CSSProperties> = {
   none: {},
 
-  blueprint: {
-    backgroundColor: '#0a1628',
-    backgroundImage: [
-      'linear-gradient(rgba(100,149,237,0.14) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(100,149,237,0.14) 1px, transparent 1px)',
-      'linear-gradient(rgba(100,149,237,0.05) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(100,149,237,0.05) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '80px 80px, 80px 80px, 16px 16px, 16px 16px',
-  },
-
   carbon: {
     backgroundColor: '#0e0e0e',
     backgroundImage: [
@@ -55,138 +61,6 @@ const DARK: Record<ChatBackground, CSSProperties> = {
     ].join(','),
     backgroundSize: '8px 8px',
   },
-
-  stars: {
-    backgroundColor: '#050510',
-    backgroundImage: [
-      'radial-gradient(circle, rgba(255,255,255,0.85) 1px, transparent 1px)',
-      'radial-gradient(circle, rgba(255,255,255,0.55) 1px, transparent 1px)',
-      'radial-gradient(circle, rgba(200,200,255,0.3) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '130px 130px, 190px 190px, 260px 260px',
-    backgroundPosition: '0 0, 65px 32px, 32px 97px',
-  },
-
-  topographic: {
-    backgroundColor: '#0f0f17',
-    backgroundImage: [
-      'repeating-radial-gradient(circle at 20% 20%, transparent 0, transparent 30px, rgba(152,0,0,0.07) 31px, transparent 32px)',
-      'repeating-radial-gradient(circle at 80% 80%, transparent 0, transparent 25px, rgba(100,100,200,0.06) 26px, transparent 27px)',
-      'repeating-radial-gradient(circle at 50% 10%, transparent 0, transparent 45px, rgba(152,0,0,0.04) 46px, transparent 47px)',
-    ].join(','),
-  },
-
-  herringbone: {
-    backgroundColor: '#111118',
-    backgroundImage: [
-      'repeating-linear-gradient(60deg, rgba(180,160,210,0.08) 0, rgba(180,160,210,0.08) 1px, transparent 0, transparent 50%)',
-      'repeating-linear-gradient(120deg, rgba(180,160,210,0.08) 0, rgba(180,160,210,0.08) 1px, transparent 0, transparent 50%)',
-    ].join(','),
-    backgroundSize: '20px 36px',
-  },
-
-  crosshatch: {
-    backgroundColor: '#0f0f0f',
-    backgroundImage: [
-      'linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px)',
-      'linear-gradient(rgba(255,255,255,0.022) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(255,255,255,0.022) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '60px 60px, 60px 60px, 12px 12px, 12px 12px',
-  },
-
-  // Interlocking zigzag stripes
-  chevron: {
-    backgroundColor: '#0f0f17',
-    backgroundImage: [
-      'linear-gradient(135deg, rgba(180,160,210,0.1) 25%, transparent 25%)',
-      'linear-gradient(225deg, rgba(180,160,210,0.1) 25%, transparent 25%)',
-      'linear-gradient(315deg, rgba(180,160,210,0.1) 25%, transparent 25%)',
-      'linear-gradient(45deg, rgba(180,160,210,0.1) 25%, transparent 25%)',
-    ].join(','),
-    backgroundSize: '20px 20px',
-  },
-
-  // Even dot grid
-  polka: {
-    backgroundColor: '#0e0e14',
-    backgroundImage: 'radial-gradient(circle, rgba(255,255,255,0.2) 2px, transparent 2px)',
-    backgroundSize: '28px 28px',
-  },
-
-  // Isometric triangle grid
-  triangles: {
-    backgroundColor: '#111118',
-    backgroundImage: [
-      'linear-gradient(60deg, rgba(100,149,237,0.09) 25%, transparent 25%, transparent 75%, rgba(100,149,237,0.09) 75%)',
-      'linear-gradient(120deg, rgba(100,149,237,0.09) 25%, transparent 25%, transparent 75%, rgba(100,149,237,0.09) 75%)',
-    ].join(','),
-    backgroundSize: '40px 70px',
-    backgroundPosition: '0 0, 20px 35px',
-  },
-
-  // Tartan-inspired crossing lines with accent colour
-  plaid: {
-    backgroundColor: '#0a1020',
-    backgroundImage: [
-      'repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(100,149,237,0.13) 39px, rgba(100,149,237,0.13) 40px)',
-      'repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(100,149,237,0.13) 39px, rgba(100,149,237,0.13) 40px)',
-      'repeating-linear-gradient(0deg, transparent, transparent 7px, rgba(152,0,0,0.08) 7px, rgba(152,0,0,0.08) 8px)',
-      'repeating-linear-gradient(90deg, transparent, transparent 7px, rgba(152,0,0,0.08) 7px, rgba(152,0,0,0.08) 8px)',
-    ].join(','),
-  },
-
-  // LotusGuild TDS exact dot-grid
-  tactical: {
-    backgroundColor: '#030508',
-    backgroundImage: 'radial-gradient(circle, rgba(0,212,255,0.055) 1px, transparent 1px)',
-    backgroundSize: '28px 28px',
-  },
-
-  // Circuit board — green grid with node dots
-  circuit: {
-    backgroundColor: '#040a04',
-    backgroundImage: [
-      'linear-gradient(rgba(0,255,136,0.045) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,255,136,0.045) 1px, transparent 1px)',
-      'radial-gradient(circle, rgba(0,255,136,0.20) 1.5px, transparent 1.5px)',
-    ].join(','),
-    backgroundSize: '40px 40px, 40px 40px, 40px 40px',
-    backgroundPosition: '0 0, 0 0, 20px 20px',
-  },
-
-  // True pointy-top hexagonal grid via SVG data URI
-  hexgrid: {
-    backgroundColor: '#060c14',
-    backgroundImage:
-      'url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2229%22%20height%3D%2250%22%3E%3Cpath%20d%3D%22M14.5%200L29%208L29%2025L14.5%2033L0%2025L0%208Z%20M14.5%2033L29%2041V50%20M14.5%2033L0%2041V50%22%20fill%3D%22none%22%20stroke%3D%22rgba%280%2C212%2C255%2C0.13%29%22%20stroke-width%3D%220.8%22/%3E%3C/svg%3E")',
-    backgroundSize: '29px 50px',
-  },
-
-  // Flowing sine-wave lines
-  waves: {
-    backgroundColor: '#080c18',
-    backgroundImage: [
-      'repeating-radial-gradient(ellipse at 0% 50%, transparent 0, transparent 18px, rgba(80,130,255,0.07) 19px, transparent 20px)',
-      'repeating-radial-gradient(ellipse at 100% 50%, transparent 0, transparent 28px, rgba(80,130,255,0.05) 29px, transparent 30px)',
-      'repeating-radial-gradient(ellipse at 50% 0%, transparent 0, transparent 22px, rgba(100,60,200,0.06) 23px, transparent 24px)',
-    ].join(','),
-  },
-
-  // Neon cyberpunk grid — orange/cyan TDS colors
-  neon: {
-    backgroundColor: '#020408',
-    backgroundImage: [
-      'linear-gradient(rgba(255,107,0,0.10) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(255,107,0,0.10) 1px, transparent 1px)',
-      'linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '60px 60px, 60px 60px, 12px 12px, 12px 12px',
-  },
-
-  // Aurora borealis — flowing gradient bands
   aurora: {
     backgroundColor: '#030810',
     backgroundImage: [
@@ -197,86 +71,30 @@ const DARK: Record<ChatBackground, CSSProperties> = {
     ].join(','),
   },
 
-  // Animated: Matrix digital rain — scrolling stripe columns + phosphor glow flicker
+  blueprint: blueprint.dark,
-  'anim-rain': {
+  stars: stars.dark,
-    backgroundColor: '#010804',
+  topographic: topographic.dark,
-    backgroundImage: [
+  herringbone: herringbone.dark,
-      'repeating-linear-gradient(180deg, rgba(0,255,136,0.16) 0px, rgba(0,255,136,0.16) 1px, transparent 1px, transparent 20px)',
+  crosshatch: crosshatch.dark,
-      'repeating-linear-gradient(180deg, rgba(0,255,136,0.07) 0px, rgba(0,255,136,0.07) 1px, transparent 1px, transparent 8px)',
+  chevron: chevron.dark,
-    ].join(','),
+  polka: polka.dark,
-    backgroundSize: '40px 200px, 12px 200px',
+  triangles: triangles.dark,
-    backgroundPosition: '0 0, 0 0',
+  plaid: plaid.dark,
-    animation: `${animRainKeyframe} 8s linear infinite`,
+  tactical: tactical.dark,
-  },
+  circuit: circuit.dark,
-
+  hexgrid: hexgrid.dark,
-  // Animated: drifting star field — three seamlessly-tiling layers at different speeds
+  waves: waves.dark,
-  'anim-stars': {
+  neon: neon.dark,
-    backgroundColor: '#050510',
+  'anim-rain': animRain.dark,
-    backgroundImage: [
+  'anim-stars': animStars.dark,
-      'radial-gradient(circle, rgba(255,255,255,0.85) 1px, transparent 1px)',
+  'anim-pulse': animPulse.dark,
-      'radial-gradient(circle, rgba(200,220,255,0.55) 1px, transparent 1px)',
+  'anim-aurora': animAurora.dark,
-      'radial-gradient(circle, rgba(180,200,255,0.3) 1px, transparent 1px)',
+  'anim-fireflies': animFireflies.dark,
-    ].join(','),
-    backgroundSize: '130px 130px, 190px 190px, 260px 260px',
-    backgroundPosition: '0 0, 65px 32px, 32px 97px',
-    animation: `${animStarsDriftKeyframe} 30s linear infinite`,
-  },
-
-  // Animated: neon grid pulse — size breathe + independent brightness oscillation
-  'anim-pulse': {
-    backgroundColor: '#030508',
-    backgroundImage: [
-      'linear-gradient(rgba(255,107,0,0.12) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(255,107,0,0.12) 1px, transparent 1px)',
-      'linear-gradient(rgba(0,212,255,0.06) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,212,255,0.06) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '60px 60px, 60px 60px, 12px 12px, 12px 12px',
-    animation: `${animGridPulseKeyframe} 4s ease-in-out infinite`,
-  },
-
-  // Animated: aurora borealis — four bands each travel an independent path
-  'anim-aurora': {
-    backgroundColor: '#020a10',
-    backgroundImage: [
-      'radial-gradient(ellipse 80% 60% at 20% 30%, rgba(0,255,136,0.12) 0%, transparent 70%)',
-      'radial-gradient(ellipse 70% 50% at 80% 70%, rgba(0,100,255,0.12) 0%, transparent 70%)',
-      'radial-gradient(ellipse 90% 70% at 50% 10%, rgba(191,95,255,0.09) 0%, transparent 65%)',
-      'radial-gradient(ellipse 75% 55% at 60% 90%, rgba(0,212,255,0.09) 0%, transparent 65%)',
-    ].join(','),
-    backgroundSize: '200% 200%, 250% 250%, 300% 300%, 220% 220%',
-    backgroundPosition: '0% 0%, 100% 0%, 50% 100%, 0% 50%',
-    animation: `${animAuroraKeyframe} 28s ease-in-out infinite`,
-  },
-
-  // Animated: fireflies — drift + brightness glow + opacity blink at prime periods
-  'anim-fireflies': {
-    backgroundColor: '#030508',
-    backgroundImage: [
-      'radial-gradient(circle, rgba(255,220,50,0.7) 1.5px, rgba(255,160,0,0.18) 3px, transparent 4px)',
-      'radial-gradient(circle, rgba(255,200,30,0.55) 1px, rgba(255,140,0,0.14) 2.5px, transparent 3.5px)',
-      'radial-gradient(circle, rgba(255,240,100,0.4) 1px, transparent 2px)',
-    ].join(','),
-    backgroundSize: '200px 200px, 280px 280px, 160px 160px',
-    backgroundPosition: '0 0, 120px 80px, 60px 140px',
-    animation: `${animFirefliesKeyframe} 30s linear infinite`,
-  },
 };
 
 const LIGHT: Record<ChatBackground, CSSProperties> = {
   none: {},
 
-  blueprint: {
-    backgroundColor: '#eef3ff',
-    backgroundImage: [
-      'linear-gradient(rgba(50,100,220,0.16) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(50,100,220,0.16) 1px, transparent 1px)',
-      'linear-gradient(rgba(50,100,220,0.06) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(50,100,220,0.06) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '80px 80px, 80px 80px, 16px 16px, 16px 16px',
-  },
-
   carbon: {
     backgroundColor: '#efefef',
     backgroundImage: [
@@ -285,129 +103,6 @@ const LIGHT: Record<ChatBackground, CSSProperties> = {
     ].join(','),
     backgroundSize: '8px 8px',
   },
-
-  // Stars is intentionally always dark — it's a night-sky theme
-  stars: {
-    backgroundColor: '#050510',
-    backgroundImage: [
-      'radial-gradient(circle, rgba(255,255,255,0.85) 1px, transparent 1px)',
-      'radial-gradient(circle, rgba(255,255,255,0.55) 1px, transparent 1px)',
-      'radial-gradient(circle, rgba(200,200,255,0.3) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '130px 130px, 190px 190px, 260px 260px',
-    backgroundPosition: '0 0, 65px 32px, 32px 97px',
-  },
-
-  topographic: {
-    backgroundColor: '#faf8f5',
-    backgroundImage: [
-      'repeating-radial-gradient(circle at 20% 20%, transparent 0, transparent 30px, rgba(100,60,60,0.09) 31px, transparent 32px)',
-      'repeating-radial-gradient(circle at 80% 80%, transparent 0, transparent 25px, rgba(60,60,130,0.07) 26px, transparent 27px)',
-      'repeating-radial-gradient(circle at 50% 10%, transparent 0, transparent 45px, rgba(100,60,60,0.05) 46px, transparent 47px)',
-    ].join(','),
-  },
-
-  herringbone: {
-    backgroundColor: '#f9f9f9',
-    backgroundImage: [
-      'repeating-linear-gradient(60deg, rgba(80,70,110,0.09) 0, rgba(80,70,110,0.09) 1px, transparent 0, transparent 50%)',
-      'repeating-linear-gradient(120deg, rgba(80,70,110,0.09) 0, rgba(80,70,110,0.09) 1px, transparent 0, transparent 50%)',
-    ].join(','),
-    backgroundSize: '20px 36px',
-  },
-
-  crosshatch: {
-    backgroundColor: '#ffffff',
-    backgroundImage: [
-      'linear-gradient(rgba(0,0,0,0.07) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,0,0,0.07) 1px, transparent 1px)',
-      'linear-gradient(rgba(0,0,0,0.025) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,0,0,0.025) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '60px 60px, 60px 60px, 12px 12px, 12px 12px',
-  },
-
-  chevron: {
-    backgroundColor: '#f9f8ff',
-    backgroundImage: [
-      'linear-gradient(135deg, rgba(80,60,130,0.1) 25%, transparent 25%)',
-      'linear-gradient(225deg, rgba(80,60,130,0.1) 25%, transparent 25%)',
-      'linear-gradient(315deg, rgba(80,60,130,0.1) 25%, transparent 25%)',
-      'linear-gradient(45deg, rgba(80,60,130,0.1) 25%, transparent 25%)',
-    ].join(','),
-    backgroundSize: '20px 20px',
-  },
-
-  polka: {
-    backgroundColor: '#fafafa',
-    backgroundImage: 'radial-gradient(circle, rgba(0,0,0,0.18) 2px, transparent 2px)',
-    backgroundSize: '28px 28px',
-  },
-
-  triangles: {
-    backgroundColor: '#f4f7ff',
-    backgroundImage: [
-      'linear-gradient(60deg, rgba(50,100,220,0.1) 25%, transparent 25%, transparent 75%, rgba(50,100,220,0.1) 75%)',
-      'linear-gradient(120deg, rgba(50,100,220,0.1) 25%, transparent 25%, transparent 75%, rgba(50,100,220,0.1) 75%)',
-    ].join(','),
-    backgroundSize: '40px 70px',
-    backgroundPosition: '0 0, 20px 35px',
-  },
-
-  plaid: {
-    backgroundColor: '#f5f0ff',
-    backgroundImage: [
-      'repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(100,50,180,0.15) 39px, rgba(100,50,180,0.15) 40px)',
-      'repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(100,50,180,0.15) 39px, rgba(100,50,180,0.15) 40px)',
-      'repeating-linear-gradient(0deg, transparent, transparent 7px, rgba(200,0,0,0.09) 7px, rgba(200,0,0,0.09) 8px)',
-      'repeating-linear-gradient(90deg, transparent, transparent 7px, rgba(200,0,0,0.09) 7px, rgba(200,0,0,0.09) 8px)',
-    ].join(','),
-  },
-
-  tactical: {
-    backgroundColor: '#f0f4fa',
-    backgroundImage: 'radial-gradient(circle, rgba(0,100,200,0.08) 1px, transparent 1px)',
-    backgroundSize: '28px 28px',
-  },
-
-  circuit: {
-    backgroundColor: '#f0f8f0',
-    backgroundImage: [
-      'linear-gradient(rgba(0,160,80,0.06) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,160,80,0.06) 1px, transparent 1px)',
-      'radial-gradient(circle, rgba(0,160,80,0.22) 1.5px, transparent 1.5px)',
-    ].join(','),
-    backgroundSize: '40px 40px, 40px 40px, 40px 40px',
-    backgroundPosition: '0 0, 0 0, 20px 20px',
-  },
-
-  hexgrid: {
-    backgroundColor: '#f4f8ff',
-    backgroundImage:
-      'url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2229%22%20height%3D%2250%22%3E%3Cpath%20d%3D%22M14.5%200L29%208L29%2025L14.5%2033L0%2025L0%208Z%20M14.5%2033L29%2041V50%20M14.5%2033L0%2041V50%22%20fill%3D%22none%22%20stroke%3D%22rgba%2850%2C100%2C220%2C0.11%29%22%20stroke-width%3D%220.8%22/%3E%3C/svg%3E")',
-    backgroundSize: '29px 50px',
-  },
-
-  waves: {
-    backgroundColor: '#eef3ff',
-    backgroundImage: [
-      'repeating-radial-gradient(ellipse at 0% 50%, transparent 0, transparent 18px, rgba(50,100,220,0.09) 19px, transparent 20px)',
-      'repeating-radial-gradient(ellipse at 100% 50%, transparent 0, transparent 28px, rgba(50,100,220,0.07) 29px, transparent 30px)',
-      'repeating-radial-gradient(ellipse at 50% 0%, transparent 0, transparent 22px, rgba(80,40,180,0.07) 23px, transparent 24px)',
-    ].join(','),
-  },
-
-  neon: {
-    backgroundColor: '#fafafa',
-    backgroundImage: [
-      'linear-gradient(rgba(196,78,0,0.12) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(196,78,0,0.12) 1px, transparent 1px)',
-      'linear-gradient(rgba(0,98,184,0.06) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,98,184,0.06) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '60px 60px, 60px 60px, 12px 12px, 12px 12px',
-  },
-
   aurora: {
     backgroundColor: '#f4faf8',
     backgroundImage: [
@@ -418,67 +113,25 @@ const LIGHT: Record<ChatBackground, CSSProperties> = {
     ].join(','),
   },
 
-  // Animated light variants
+  blueprint: blueprint.light,
-
+  stars: stars.light,
-  'anim-rain': {
+  topographic: topographic.light,
-    backgroundColor: '#f0fff4',
+  herringbone: herringbone.light,
-    backgroundImage: [
+  crosshatch: crosshatch.light,
-      'repeating-linear-gradient(180deg, rgba(0,160,80,0.16) 0px, rgba(0,160,80,0.16) 1px, transparent 1px, transparent 20px)',
+  chevron: chevron.light,
-      'repeating-linear-gradient(180deg, rgba(0,160,80,0.07) 0px, rgba(0,160,80,0.07) 1px, transparent 1px, transparent 8px)',
+  polka: polka.light,
-    ].join(','),
+  triangles: triangles.light,
-    backgroundSize: '40px 200px, 12px 200px',
+  plaid: plaid.light,
-    backgroundPosition: '0 0, 0 0',
+  tactical: tactical.light,
-    animation: `${animRainKeyframe} 8s linear infinite`,
+  circuit: circuit.light,
-  },
+  hexgrid: hexgrid.light,
-
+  waves: waves.light,
-  'anim-stars': {
+  neon: neon.light,
-    backgroundColor: '#f5f5ff',
+  'anim-rain': animRain.light,
-    backgroundImage: [
+  'anim-stars': animStars.light,
-      'radial-gradient(circle, rgba(60,60,160,0.50) 1px, transparent 1px)',
+  'anim-pulse': animPulse.light,
-      'radial-gradient(circle, rgba(80,80,180,0.35) 1px, transparent 1px)',
+  'anim-aurora': animAurora.light,
-      'radial-gradient(circle, rgba(100,100,200,0.20) 1px, transparent 1px)',
+  'anim-fireflies': animFireflies.light,
-    ].join(','),
-    backgroundSize: '130px 130px, 190px 190px, 260px 260px',
-    backgroundPosition: '0 0, 65px 32px, 32px 97px',
-    animation: `${animStarsDriftKeyframe} 30s linear infinite`,
-  },
-
-  'anim-pulse': {
-    backgroundColor: '#ffffff',
-    backgroundImage: [
-      'linear-gradient(rgba(0,98,184,0.14) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,98,184,0.14) 1px, transparent 1px)',
-      'linear-gradient(rgba(0,98,184,0.06) 1px, transparent 1px)',
-      'linear-gradient(90deg, rgba(0,98,184,0.06) 1px, transparent 1px)',
-    ].join(','),
-    backgroundSize: '60px 60px, 60px 60px, 12px 12px, 12px 12px',
-    animation: `${animGridPulseKeyframe} 4s ease-in-out infinite`,
-  },
-
-  'anim-aurora': {
-    backgroundColor: '#f0f8f4',
-    backgroundImage: [
-      'radial-gradient(ellipse 80% 60% at 20% 30%, rgba(0,160,80,0.13) 0%, transparent 70%)',
-      'radial-gradient(ellipse 70% 50% at 80% 70%, rgba(0,80,200,0.13) 0%, transparent 70%)',
-      'radial-gradient(ellipse 90% 70% at 50% 10%, rgba(140,60,220,0.10) 0%, transparent 65%)',
-      'radial-gradient(ellipse 75% 55% at 60% 90%, rgba(0,160,200,0.10) 0%, transparent 65%)',
-    ].join(','),
-    backgroundSize: '200% 200%, 250% 250%, 300% 300%, 220% 220%',
-    backgroundPosition: '0% 0%, 100% 0%, 50% 100%, 0% 50%',
-    animation: `${animAuroraKeyframe} 28s ease-in-out infinite`,
-  },
-
-  'anim-fireflies': {
-    backgroundColor: '#fffdf0',
-    backgroundImage: [
-      'radial-gradient(circle, rgba(180,120,0,0.70) 1.5px, rgba(160,90,0,0.18) 3px, transparent 4px)',
-      'radial-gradient(circle, rgba(160,100,0,0.55) 1px, rgba(140,80,0,0.14) 2.5px, transparent 3.5px)',
-      'radial-gradient(circle, rgba(200,140,0,0.40) 1px, transparent 2px)',
-    ].join(','),
-    backgroundSize: '200px 200px, 280px 280px, 160px 160px',
-    backgroundPosition: '0 0, 120px 80px, 60px 140px',
-    animation: `${animFirefliesKeyframe} 30s linear infinite`,
-  },
 };
 
 export const getChatBg = (

src/app/features/message-search/MessageSearch.tsx

@@ -11,6 +11,8 @@ import {
   Line,
   toRem,
   Button,
+  Switch,
+  Chip,
 } from 'folds';
 import { useAtom, useAtomValue } from 'jotai';
 import { useVirtualizer } from '@tanstack/react-virtual';
@@ -41,7 +43,9 @@ import {
   ResultGroup,
   useMessageSearch,
 } from './useMessageSearch';
-import { useLocalMessageSearch } from './useLocalMessageSearch';
+import { LocalSearchResult, useLocalMessageSearch } from './useLocalMessageSearch';
+import { searchCacheEnabledAtom } from '../../state/searchCacheEnabled';
+import { clearAll as clearSearchCache } from '../../utils/searchCache';
 import { addRecentSearch, recentSearchesAtom } from '../../state/recentSearches';
 import { SearchResultGroup } from './SearchResultGroup';
 import { SearchInput } from './SearchInput';
@@ -240,6 +244,10 @@ export function MessageSearch({
   // Bump this whenever more messages are loaded so localResult re-computes
   const [cacheVersion, setCacheVersion] = useState(0);
   const handleCacheLoaded = useCallback(() => setCacheVersion((v) => v + 1), []);
+  // Explicit wipe of the persistent on-disk index, then re-run the merge.
+  const handleClearSearchCache = useCallback(() => {
+    clearSearchCache().then(() => setCacheVersion((v) => v + 1));
+  }, []);
 
   // The rooms actually in scope for this search (mirrors server-side logic)
   const localSearchRooms = useMemo(
@@ -253,24 +261,43 @@ export function MessageSearch({
   const hasActiveSearch = msgSearchParams.term !== undefined || !!msgSearchParams.senders?.length;
   const senderOnlyMode = !msgSearchParams.term && !!msgSearchParams.senders?.length;
 
-  // Run synchronous client-side search immediately.
+  // Run the client-side search whenever inputs change.
   // In text-search mode: covers encrypted rooms only (server handles plaintext).
   // In sender-only mode: covers all rooms (server has no sender-only search).
-  // cacheVersion in deps so it re-runs after "Load more" paginates new events.
+  // The scan is async because — when the persistent cache is enabled — it also
-  const localResult = useMemo(() => {
+  // reads cached rows from IndexedDB and merges them with the in-memory hits.
-    if (!hasActiveSearch) return null;
+  // cacheVersion in deps so it re-runs after "Load more" paginates new events;
-    return searchLocalMessages({
+  // searchCacheEnabled so toggling the cache re-runs the merge.
+  const [searchCacheEnabled, setSearchCacheEnabled] = useAtom(searchCacheEnabledAtom);
+  const [localResult, setLocalResult] = useState<LocalSearchResult | null>(null);
+  useEffect(() => {
+    if (!hasActiveSearch) {
+      setLocalResult(null);
+      return undefined;
+    }
+    let cancelled = false;
+    searchLocalMessages({
       term: msgSearchParams.term ?? '',
       roomIds: localSearchRooms,
       senders: msgSearchParams.senders,
+      fromTs: msgSearchParams.fromTs,
+      toTs: msgSearchParams.toTs,
+    }).then((result) => {
+      if (!cancelled) setLocalResult(result);
     });
-    // eslint-disable-next-line react-hooks/exhaustive-deps
+    return () => {
+      cancelled = true;
+    };
   }, [
     searchLocalMessages,
     localSearchRooms,
     msgSearchParams.term,
     msgSearchParams.senders,
+    msgSearchParams.fromTs,
+    msgSearchParams.toTs,
+    hasActiveSearch,
     cacheVersion,
+    searchCacheEnabled,
   ]);
 
   const { status, data, error, fetchNextPage, hasNextPage, isFetchingNextPage } = useInfiniteQuery({
@@ -668,6 +695,37 @@ export function MessageSearch({
                     ? `Showing locally cached messages from ${localResult.searchedRoomsCount} encrypted room${localResult.searchedRoomsCount !== 1 ? 's' : ''}. Load more history below to extend coverage.`
                     : `No matches in your local cache. Load messages below to search further back.`}
               </Text>
+              <Box
+                alignItems="Center"
+                gap="200"
+                style={{
+                  padding: config.space.S200,
+                  background: color.SurfaceVariant.Container,
+                  borderRadius: config.radii.R300,
+                }}
+              >
+                <Switch
+                  variant="Primary"
+                  value={searchCacheEnabled}
+                  onChange={setSearchCacheEnabled}
+                />
+                <Box grow="Yes" direction="Column" style={{ minWidth: 0 }}>
+                  <Text size="T300">Persist search index on this device</Text>
+                  <Text size="T200" priority="300">
+                    Stores decrypted text on this device
+                  </Text>
+                </Box>
+                {searchCacheEnabled && (
+                  <Chip
+                    variant="Secondary"
+                    radii="Pill"
+                    onClick={handleClearSearchCache}
+                    before={<Icon size="100" src={Icons.Delete} />}
+                  >
+                    <Text size="T200">Clear cached index</Text>
+                  </Chip>
+                )}
+              </Box>
               <Line size="300" variant="Surface" />
             </Box>
             {localGroups.length > 0 && (

src/app/features/message-search/useLocalMessageSearch.ts

@@ -1,12 +1,23 @@
-import { EventType } from 'matrix-js-sdk';
+import { EventType, MatrixEvent } from 'matrix-js-sdk';
 import { useCallback } from 'react';
+import { useAtomValue } from 'jotai';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { ResultGroup, ResultItem } from './useMessageSearch';
+import { searchCacheEnabledAtom } from '../../state/searchCacheEnabled';
+import {
+  mergeSearchResults,
+  queryRoom,
+  saveRoomIndex,
+  SearchCacheRow,
+} from '../../utils/searchCache';
 
 export type LocalSearchParams = {
   term: string;
   roomIds: string[];
   senders?: string[];
+  /** Optional date-range filter (ms). Applied to both memory and cached rows. */
+  fromTs?: number;
+  toTs?: number;
 };
 
 export type LocalSearchResult = {
@@ -17,19 +28,110 @@ export type LocalSearchResult = {
   searchedRoomsCount: number;
 };
 
+/** Extracted, searchable plaintext for a single message event. */
+type ExtractedText = {
+  body: string;
+  formattedBody: string;
+  pollText: string;
+};
+
+const POLL_START_TYPES = ['m.poll.start', 'org.matrix.msc3381.poll.start'];
+
+/**
+ * Pull the text we index/search from a decrypted event's content. Returns
+ * `null` for events that carry no searchable text (e.g. stickers).
+ */
+const extractText = (event: MatrixEvent): ExtractedText | null => {
+  const evType = event.getType();
+  const content = event.getContent();
+
+  if (POLL_START_TYPES.includes(evType)) {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const poll = (content['m.poll'] ?? content['org.matrix.msc3381.poll.start']) as any;
+    if (!poll) return null;
+    const qBody =
+      (poll.question?.['m.text'] as Array<{ body: string }> | undefined)?.[0]?.body ??
+      (poll.question?.body as string | undefined) ??
+      '';
+    const answerBodies = ((poll.answers ?? []) as Array<Record<string, unknown>>)
+      .map(
+        (a) =>
+          ((a['m.text'] as Array<{ body: string }> | undefined)?.[0]?.body ??
+            // eslint-disable-next-line @typescript-eslint/no-explicit-any
+            (a['org.matrix.msc3381.poll.answer'] as any)?.body ??
+            '') as string,
+      )
+      .join(' ');
+    const pollText = `${qBody} ${answerBodies}`.trim();
+    return pollText ? { body: '', formattedBody: '', pollText } : null;
+  }
+
+  if (evType !== EventType.RoomMessage) return null;
+
+  const body = (content.body as string | undefined) ?? '';
+  const formattedBody = (content.formatted_body as string | undefined) ?? '';
+  if (!body && !formattedBody) return null;
+  return { body, formattedBody, pollText: '' };
+};
+
+/** Does the extracted text contain the (already-lowercased) term? */
+const matchesTerm = (text: ExtractedText, termLower: string): boolean =>
+  text.body.toLowerCase().includes(termLower) ||
+  text.formattedBody.toLowerCase().includes(termLower) ||
+  text.pollText.toLowerCase().includes(termLower);
+
+const rowMatchesTerm = (row: SearchCacheRow, termLower: string): boolean =>
+  row.body.toLowerCase().includes(termLower) ||
+  (row.formattedBody ?? '').toLowerCase().includes(termLower) ||
+  (row.pollText ?? '').toLowerCase().includes(termLower);
+
+/** Build the synthetic result item a cached row renders as (text message). */
+const rowToResultItem = (row: SearchCacheRow): ResultItem => {
+  const bodyText = row.body || row.pollText || '';
+  const content: Record<string, unknown> = { msgtype: 'm.text', body: bodyText };
+  if (row.formattedBody) {
+    content.format = 'org.matrix.custom.html';
+    content.formatted_body = row.formattedBody;
+  }
+  const syntheticEvent = {
+    room_id: row.roomId,
+    event_id: row.eventId,
+    type: EventType.RoomMessage,
+    sender: row.sender,
+    origin_server_ts: row.ts,
+    content,
+    unsigned: {},
+  };
+  return {
+    rank: 0,
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    event: syntheticEvent as any,
+    context: { events_before: [], events_after: [], profile_info: {} },
+  };
+};
+
 /**
  * Client-side full-text search over locally cached events in encrypted rooms.
  * The homeserver cannot search E2EE message content, so we scan whatever the
  * client has already received and decrypted in memory.
  *
- * Limitation: only messages present in the live timeline window are covered.
+ * When the persistent search cache is enabled (opt-in), the in-memory scan is
- * Rooms that haven't been opened yet will return no results.
+ * also persisted to IndexedDB (fire-and-forget) and merged with prior cached
+ * coverage so results survive reloads. When disabled, zero cache reads/writes
+ * occur.
  */
 export const useLocalMessageSearch = () => {
   const mx = useMatrixClient();
+  const cacheEnabled = useAtomValue(searchCacheEnabledAtom);
 
   const search = useCallback(
-    ({ term, roomIds, senders }: LocalSearchParams): LocalSearchResult => {
+    async ({
+      term,
+      roomIds,
+      senders,
+      fromTs,
+      toTs,
+    }: LocalSearchParams): Promise<LocalSearchResult> => {
       const trimmedTerm = term.trim();
       const senderSet = senders && senders.length > 0 ? new Set(senders) : null;
 
@@ -41,6 +143,9 @@ export const useLocalMessageSearch = () => {
       }
 
       const termLower = trimmedTerm.toLowerCase();
+      const inRange = (ts: number): boolean =>
+        (fromTs === undefined || ts >= fromTs) && (toTs === undefined || ts <= toTs);
+
       const groups: ResultGroup[] = [];
       let encryptedRoomsCount = 0;
       let searchedRoomsCount = 0;
@@ -61,106 +166,99 @@ export const useLocalMessageSearch = () => {
           .getUnfilteredTimelineSet()
           .getTimelines()
           .flatMap((tl) => tl.getEvents());
-        if (events.length === 0) continue;
+
+        // eslint-disable-next-line no-await-in-loop
+        const cachedRows = cacheEnabled ? await queryRoom(roomId) : [];
+
+        if (events.length === 0 && cachedRows.length === 0) continue;
 
         searchedRoomsCount += 1;
 
-        const items: ResultItem[] = [];
+        const memoryItems: ResultItem[] = [];
+        const rowsToPersist: SearchCacheRow[] = [];
 
         for (let i = 0; i < events.length; i += 1) {
           const event = events[i];
-
-          // In sender-only mode: include all message types; skip non-message events
-          if (event.getType() !== EventType.RoomMessage) {
-            if (senderOnlyMode) continue;
-            const evType = event.getType();
-            const isSticker = evType === 'm.sticker';
-            const isPoll = evType === 'm.poll.start' || evType === 'org.matrix.msc3381.poll.start';
-            if (!isSticker && !isPoll) continue;
-          }
-
           if (event.isDecryptionFailure()) continue;
           if (event.isRedacted()) continue;
-          if (senderSet && !senderSet.has(event.getSender() ?? '')) continue;
 
-          // getContent() returns decrypted plaintext regardless of encryption
+          const evType = event.getType();
-          const content = event.getContent();
+          const isSticker = evType === 'm.sticker';
+          const isMessageLike =
+            evType === EventType.RoomMessage || POLL_START_TYPES.includes(evType);
 
-          // Sender-only mode: no text filter needed
+          // Sender-only mode indexes/returns all message types; text mode needs text.
-          if (!senderOnlyMode) {
+          if (!senderOnlyMode && !isMessageLike && !isSticker) continue;
-            const evType = event.getType();
-            const isPoll = evType === 'm.poll.start' || evType === 'org.matrix.msc3381.poll.start';
 
-            let body = '';
+          const sender = event.getSender() ?? '';
-            let formattedBody = '';
+          const ts = event.getTs();
-            if (!isPoll) {
+          const text = extractText(event);
-              body = (content.body as string | undefined) ?? '';
-              formattedBody = (content.formatted_body as string | undefined) ?? '';
-            } else {
-              // Poll — index question text and all answer options
-              const poll = (content['m.poll'] ??
-                // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                content['org.matrix.msc3381.poll.start']) as any;
-              if (poll) {
-                const qBody =
-                  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                  (poll.question?.['m.text'] as Array<{ body: string }> | undefined)?.[0]?.body ??
-                  (poll.question?.body as string | undefined) ??
-                  '';
-                const answerBodies = ((poll.answers ?? []) as Array<Record<string, unknown>>)
-                  .map(
-                    (a) =>
-                      // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                      ((a['m.text'] as Array<{ body: string }> | undefined)?.[0]?.body ??
-                        // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                        (a['org.matrix.msc3381.poll.answer'] as any)?.body ??
-                        '') as string,
-                  )
-                  .join(' ');
-                body = `${qBody} ${answerBodies}`.trim();
-              }
-            }
 
-            if (
+          // Persist every indexable (text-bearing) event we scanned, regardless
-              !body.toLowerCase().includes(termLower) &&
+          // of whether it matches the current term — future searches benefit.
-              !formattedBody.toLowerCase().includes(termLower)
+          if (cacheEnabled && text && event.getId()) {
-            )
+            rowsToPersist.push({
-              continue;
+              roomId,
+              eventId: event.getId() as string,
+              ts,
+              sender,
+              body: text.body,
+              ...(text.formattedBody ? { formattedBody: text.formattedBody } : {}),
+              ...(text.pollText ? { pollText: text.pollText } : {}),
+            });
           }
 
-          // Build a synthetic IEventWithRoomId using decrypted content so the
+          if (senderSet && !senderSet.has(sender)) continue;
-          // existing SearchResultGroup renderer works without modification.
+          if (!inRange(ts)) continue;
+
+          if (!senderOnlyMode) {
+            if (!text || !matchesTerm(text, termLower)) continue;
+          }
+
+          const content = event.getContent();
           const syntheticEvent = {
             room_id: roomId,
             event_id: event.getId() ?? '',
-            type: event.getType(),
+            type: evType,
-            sender: event.getSender() ?? '',
+            sender,
-            origin_server_ts: event.getTs(),
+            origin_server_ts: ts,
             content,
             unsigned: event.getUnsigned(),
           };
-
+          memoryItems.push({
-          items.push({
             rank: 0,
             // eslint-disable-next-line @typescript-eslint/no-explicit-any
             event: syntheticEvent as any,
-            context: {
+            context: { events_before: [], events_after: [], profile_info: {} },
-              events_before: [],
-              events_after: [],
-              profile_info: {},
-            },
           });
         }
 
+        // Match cached rows (skip ids already present in memory happens in merge).
+        const cachedItems: ResultItem[] = [];
+        cachedRows.forEach((row) => {
+          if (senderSet && !senderSet.has(row.sender)) return;
+          if (!inRange(row.ts)) return;
+          if (!senderOnlyMode && !rowMatchesTerm(row, termLower)) return;
+          cachedItems.push(rowToResultItem(row));
+        });
+
+        const items = mergeSearchResults(memoryItems, cachedItems);
+
         if (items.length > 0) {
-          items.sort((a, b) => (b.event.origin_server_ts ?? 0) - (a.event.origin_server_ts ?? 0));
           groups.push({ roomId, items });
         }
+
+        // Fire-and-forget persist of freshly scanned rows + coverage.
+        // saveRoomIndex swallows all errors internally, so a floating promise
+        // here can never reject.
+        if (cacheEnabled && rowsToPersist.length > 0) {
+          saveRoomIndex(roomId, rowsToPersist);
+        }
       }
 
       return { groups, encryptedRoomsCount, searchedRoomsCount };
     },
-    [mx],
+    [mx, cacheEnabled],
   );
 
   return search;

src/app/features/room-settings/general/General.tsx

@@ -11,6 +11,7 @@ import {
   RoomLocalAddresses,
   RoomPublishedAddresses,
   RoomPublish,
+  RoomQuality,
   RoomShareInvite,
   RoomUpgrade,
   RoomVoiceLimit,
@@ -58,6 +59,7 @@ export function General({ requestClose }: GeneralProps) {
               <Box direction="Column" gap="100">
                 <Text size="L400">Voice</Text>
                 <RoomVoiceLimit permissions={permissions} />
+                <RoomQuality permissions={permissions} />
               </Box>
               <Box direction="Column" gap="100">
                 <Text size="L400">Addresses</Text>

src/app/features/room/DraftIndicator.css.ts

@@ -0,0 +1,31 @@
+import { keyframes, style } from '@vanilla-extract/css';
+import { color, toRem } from 'folds';
+
+// A brief, gentle acknowledgement when a draft first becomes persisted.
+// Guarded by `prefers-reduced-motion` so it only plays for users who opt in.
+const savedPulse = keyframes({
+  '0%': { opacity: 0.4, transform: 'scale(0.7)' },
+  '45%': { opacity: 1, transform: 'scale(1.15)' },
+  '100%': { opacity: 1, transform: 'scale(1)' },
+});
+
+export const DraftIndicatorBase = style({
+  userSelect: 'none',
+  whiteSpace: 'nowrap',
+});
+
+export const DraftDot = style({
+  width: toRem(6),
+  height: toRem(6),
+  borderRadius: '50%',
+  backgroundColor: color.Success.Main,
+  flexShrink: 0,
+});
+
+export const DraftDotPulse = style({
+  '@media': {
+    '(prefers-reduced-motion: no-preference)': {
+      animation: `${savedPulse} 600ms ease-out`,
+    },
+  },
+});

src/app/features/room/DraftIndicator.tsx

@@ -0,0 +1,64 @@
+import React, { useEffect, useRef, useState } from 'react';
+import { useAtomValue } from 'jotai';
+import { Box, Text, config } from 'folds';
+
+import { roomIdToMsgDraftAtomFamily } from '../../state/room/roomInputDrafts';
+import { toPlainText } from '../../components/editor';
+import { DraftDot, DraftDotPulse, DraftIndicatorBase } from './DraftIndicator.css';
+
+const PULSE_DURATION = 600;
+
+type DraftIndicatorProps = {
+  roomId: string;
+};
+
+/**
+ * Subtle, non-distracting status shown near the composer when the current room
+ * has a persisted (unsent) message draft. It reacts to the shared draft atom
+ * (`roomIdToMsgDraftAtomFamily`) — the same source that backs the
+ * `draft-msg-${roomId}` localStorage persistence — so it never introduces a
+ * parallel persistence path.
+ *
+ * A short "Saved" pulse plays the moment a draft becomes persisted, then the
+ * indicator settles into a quiet, muted resting state. The pulse is gated behind
+ * `prefers-reduced-motion` in CSS, so motion-averse users only ever see the
+ * static label.
+ */
+export function DraftIndicator({ roomId }: DraftIndicatorProps) {
+  const draft = useAtomValue(roomIdToMsgDraftAtomFamily(roomId));
+  // Real content, not just an empty paragraph.
+  const hasDraft = toPlainText(draft, false).trim().length > 0;
+
+  const [pulse, setPulse] = useState(false);
+  const hadDraft = useRef(false);
+
+  useEffect(() => {
+    if (hasDraft && !hadDraft.current) {
+      hadDraft.current = true;
+      setPulse(true);
+      const timeout = setTimeout(() => setPulse(false), PULSE_DURATION);
+      return () => clearTimeout(timeout);
+    }
+    hadDraft.current = hasDraft;
+    return undefined;
+  }, [hasDraft]);
+
+  if (!hasDraft) return null;
+
+  return (
+    <Box
+      className={DraftIndicatorBase}
+      as="span"
+      shrink="No"
+      alignItems="Center"
+      gap="200"
+      style={{ padding: `0 ${config.space.S100}` }}
+      aria-hidden
+    >
+      <span className={`${DraftDot}${pulse ? ` ${DraftDotPulse}` : ''}`} />
+      <Text as="span" size="T200" priority="300">
+        Draft saved
+      </Text>
+    </Box>
+  );
+}

src/app/features/room/Room.tsx

@@ -22,6 +22,8 @@ import { callChatAtom } from '../../state/callEmbed';
 import { CallChatView } from './CallChatView';
 import { useCallEmbed } from '../../hooks/useCallEmbed';
 import { useCallMembers, useCallSession } from '../../hooks/useCall';
+import { roomIdToActiveThreadIdAtomFamily } from '../../state/room/thread';
+import { ThreadPanel } from './thread';
 
 export function Room() {
   const { eventId } = useParams();
@@ -33,6 +35,8 @@ export function Room() {
   const callEmbed = useCallEmbed();
 
   const [isDrawer] = useSetting(settingsAtom, 'isPeopleDrawer');
+  const activeThreadId = useAtomValue(roomIdToActiveThreadIdAtomFamily(room.roomId));
+  const setActiveThreadId = useSetAtom(roomIdToActiveThreadIdAtomFamily(room.roomId));
   const galleryOpen = useAtomValue(mediaGalleryAtom);
   const setGalleryOpen = useSetAtom(mediaGalleryAtom);
   const [hideActivity] = useSetting(settingsAtom, 'hideActivity');
@@ -90,6 +94,19 @@ export function Room() {
             <MediaGallery key={room.roomId} room={room} onClose={() => setGalleryOpen(false)} />
           </>
         )}
+        {!callView && activeThreadId && (
+          <>
+            {screenSize === ScreenSize.Desktop && (
+              <Line variant="Background" direction="Vertical" size="300" />
+            )}
+            <ThreadPanel
+              key={`${room.roomId}${activeThreadId}`}
+              room={room}
+              threadId={activeThreadId}
+              requestClose={() => setActiveThreadId(null)}
+            />
+          </>
+        )}
         {!callView && isDrawer && (
           <>
             {screenSize === ScreenSize.Desktop && (

src/app/features/room/RoomInput.tsx

@@ -1,9 +1,11 @@
 import React, {
   KeyboardEventHandler,
+  ReactNode,
   RefObject,
   forwardRef,
   useCallback,
   useEffect,
+  useMemo,
   useRef,
   useState,
 } from 'react';
@@ -98,7 +100,11 @@ import { safeFile } from '../../utils/mimeTypes';
 import { fulfilledPromiseSettledResult } from '../../utils/common';
 import { useSetting } from '../../state/hooks/settings';
 import { useAlive } from '../../hooks/useAlive';
-import { settingsAtom } from '../../state/settings';
+import {
+  ComposerToolbarButtonKey,
+  normalizeComposerToolbarOrder,
+  settingsAtom,
+} from '../../state/settings';
 import {
   getAudioMsgContent,
   getFileMsgContent,
@@ -128,7 +134,9 @@ import { PollCreator } from './PollCreator';
 import { useRoomUnverifiedDeviceCount } from '../../hooks/useDeviceVerificationStatus';
 import { ScheduleMessageModal } from './ScheduleMessageModal';
 import { ScheduledMessagesTray } from './ScheduledMessagesTray';
+import { DraftIndicator } from './DraftIndicator';
 import { scheduledMessagesAtom } from '../../state/scheduledMessages';
+import { getThreadDraftKey } from '../../state/room/thread';
 
 const GifPicker = React.lazy(() =>
   import('../../components/GifPicker').then((m) => ({ default: m.GifPicker })),
@@ -142,9 +150,10 @@ interface RoomInputProps {
   fileDropContainerRef: RefObject<HTMLElement>;
   roomId: string;
   room: Room;
+  threadRootId?: string;
 }
 export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
-  ({ editor, fileDropContainerRef, roomId, room }, ref) => {
+  ({ editor, fileDropContainerRef, roomId, room, threadRootId }, ref) => {
     const mx = useMatrixClient();
     const useAuthentication = useMediaAuthentication();
     const [enterForNewline] = useSetting(settingsAtom, 'enterForNewline');
@@ -177,8 +186,11 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
     const setScheduledMessages = useSetAtom(scheduledMessagesAtom);
 
     const alive = useAlive();
-    const [msgDraft, setMsgDraft] = useAtom(roomIdToMsgDraftAtomFamily(roomId));
+    // Scope drafts/replies/uploads by thread so a thread composer stays fully
-    const [replyDraft, setReplyDraft] = useAtom(roomIdToReplyDraftAtomFamily(roomId));
+    // isolated from the main room composer (and from other threads).
+    const draftKey = threadRootId ? getThreadDraftKey(roomId, threadRootId) : roomId;
+    const [msgDraft, setMsgDraft] = useAtom(roomIdToMsgDraftAtomFamily(draftKey));
+    const [replyDraft, setReplyDraft] = useAtom(roomIdToReplyDraftAtomFamily(draftKey));
     const replyUserID = replyDraft?.userId;
 
     const powerLevelTags = usePowerLevelTags(room, powerLevels);
@@ -199,7 +211,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
       legacyUsernameColor || direct ? colorMXID(replyUserID ?? '') : replyPowerColor;
 
     const [uploadBoard, setUploadBoard] = useState(true);
-    const [selectedFiles, setSelectedFiles] = useAtom(roomIdToUploadItemsAtomFamily(roomId));
+    const [selectedFiles, setSelectedFiles] = useAtom(roomIdToUploadItemsAtomFamily(draftKey));
     const uploadFamilyObserverAtom = createUploadFamilyObserverAtom(
       roomUploadAtomFamily,
       selectedFiles.map((f) => f.file),
@@ -218,7 +230,12 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
     const showLocation = composerToolbarButtons?.showLocation ?? true;
     const showPoll = composerToolbarButtons?.showPoll ?? true;
     const showVoice = composerToolbarButtons?.showVoice ?? true;
-    const showSchedule = composerToolbarButtons?.showSchedule ?? true;
+    // Schedule-send is hidden in thread mode (v1 reduction).
+    const showSchedule = (composerToolbarButtons?.showSchedule ?? true) && !threadRootId;
+    const composerButtonOrder = useMemo(
+      () => normalizeComposerToolbarOrder(composerToolbarButtons?.order),
+      [composerToolbarButtons?.order],
+    );
     const [locating, setLocating] = React.useState(false);
     const [locationError, setLocationError] = React.useState<string | null>(null);
     const handleShareLocation = useCallback(() => {
@@ -233,7 +250,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
           setLocating(false);
           const { latitude, longitude } = pos.coords;
           const geoUri = `geo:${latitude.toFixed(6)},${longitude.toFixed(6)}`;
-          mx.sendMessage(roomId, {
+          mx.sendMessage(roomId, threadRootId ?? null, {
             msgtype: 'm.location',
             body: `Location: ${geoUri}`,
             geo_uri: geoUri,
@@ -252,7 +269,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
         },
         { timeout: 10000 },
       );
-    }, [mx, roomId]);
+    }, [mx, roomId, threadRootId]);
 
     const handleVoiceSend = useCallback(
       async (blob: Blob, mimeType: string, durationMs: number, waveform: number[]) => {
@@ -268,7 +285,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
         if (room.hasEncryptionStateEvent()) {
           const { encInfo, file: encBlob } = await encryptFile(blob);
           const uploadResult = await mx.uploadContent(encBlob);
-          mx.sendMessage(roomId, {
+          mx.sendMessage(roomId, threadRootId ?? null, {
             ...baseContent,
             file: { ...encInfo, url: uploadResult.content_uri },
           } as any);
@@ -277,13 +294,13 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
             name: 'voice-message.ogg',
             type: mimeType,
           });
-          mx.sendMessage(roomId, {
+          mx.sendMessage(roomId, threadRootId ?? null, {
             ...baseContent,
             url: uploadResult.content_uri,
           } as any);
         }
       },
-      [mx, room, roomId],
+      [mx, room, roomId, threadRootId],
     );
 
     const [autocompleteQuery, setAutocompleteQuery] =
@@ -353,33 +370,37 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
       } else {
         // Jotai draft is empty (page reload) — try localStorage fallback
         try {
-          const stored = localStorage.getItem(`draft-msg-${roomId}`);
+          const stored = localStorage.getItem(`draft-msg-${draftKey}`);
           if (stored) {
             const nodes = JSON.parse(stored);
             if (Array.isArray(nodes) && nodes.length > 0) {
               Transforms.insertFragment(editor, nodes);
+              // Mirror the restored draft into the atom so the draft indicator
+              // (reads roomIdToMsgDraftAtomFamily) reflects a persisted draft
+              // after a page reload — not only on same-session room re-entry.
+              setMsgDraft(nodes);
             }
           }
         } catch {
           // Ignore malformed stored draft
         }
       }
-    }, [editor, msgDraft, roomId]);
+    }, [editor, msgDraft, draftKey, setMsgDraft]);
 
     useEffect(
       () => () => {
         if (!isEmptyEditor(editor)) {
           const parsedDraft = JSON.parse(JSON.stringify(editor.children));
           setMsgDraft(parsedDraft);
-          localStorage.setItem(`draft-msg-${roomId}`, JSON.stringify(parsedDraft));
+          localStorage.setItem(`draft-msg-${draftKey}`, JSON.stringify(parsedDraft));
         } else {
           setMsgDraft([]);
-          localStorage.removeItem(`draft-msg-${roomId}`);
+          localStorage.removeItem(`draft-msg-${draftKey}`);
         }
         resetEditor(editor);
         resetEditorHistory(editor);
       },
-      [roomId, editor, setMsgDraft],
+      [draftKey, editor, setMsgDraft],
     );
 
     const handleFileMetadata = useCallback(
@@ -472,15 +493,17 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
         });
         handleCancelUpload(uploads);
         const contents = fulfilledPromiseSettledResult(await Promise.allSettled(contentsPromises));
-        contents.forEach((content) => mx.sendMessage(roomId, content as any));
+        contents.forEach((content) => mx.sendMessage(roomId, threadRootId ?? null, content as any));
       },
-      [mx, roomId, selectedFiles, handleCancelUpload],
+      [mx, roomId, threadRootId, selectedFiles, handleCancelUpload],
     );
 
     const submit = useCallback(() => {
       uploadBoardHandlers.current?.handleSend();
 
-      const commandName = getBeginCommand(editor);
+      // Slash-command interpretation is disabled in thread mode (v1): "/foo"
+      // sends literally rather than being parsed as a command.
+      const commandName = threadRootId ? undefined : getBeginCommand(editor);
       let plainText = toPlainText(editor.children, isMarkdown).trim();
       let customHtml = trimCustomHtml(
         toMatrixCustomHTML(editor.children, {
@@ -553,13 +576,24 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
           content['m.relates_to'].is_falling_back = false;
         }
       }
-      mx.sendMessage(roomId, content as any);
+      mx.sendMessage(roomId, threadRootId ?? null, content as any);
       resetEditor(editor);
       resetEditorHistory(editor);
-      localStorage.removeItem(`draft-msg-${roomId}`);
+      localStorage.removeItem(`draft-msg-${draftKey}`);
       setReplyDraft(undefined);
       sendTypingStatus(false);
-    }, [mx, roomId, editor, replyDraft, sendTypingStatus, setReplyDraft, isMarkdown, commands]);
+    }, [
+      mx,
+      roomId,
+      threadRootId,
+      draftKey,
+      editor,
+      replyDraft,
+      sendTypingStatus,
+      setReplyDraft,
+      isMarkdown,
+      commands,
+    ]);
 
     /**
      * Build a text message content object from the current editor state.
@@ -628,11 +662,11 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
         });
         resetEditor(editor);
         resetEditorHistory(editor);
-        localStorage.removeItem(`draft-msg-${roomId}`);
+        localStorage.removeItem(`draft-msg-${draftKey}`);
         setReplyDraft(undefined);
         sendTypingStatus(false);
       },
-      [setScheduledMessages, roomId, editor, setReplyDraft, sendTypingStatus],
+      [setScheduledMessages, roomId, draftKey, editor, setReplyDraft, sendTypingStatus],
     );
 
     const handleKeyDown: KeyboardEventHandler = useCallback(
@@ -727,7 +761,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
           );
           const mxcUrl = (uploadRes as { content_uri: string }).content_uri;
           if (!mxcUrl) return;
-          mx.sendMessage(roomId, {
+          mx.sendMessage(roomId, threadRootId ?? null, {
             msgtype: MsgType.Image,
             body: 'image.gif',
             url: mxcUrl,
@@ -742,7 +776,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
           if (alive()) setGifUploading(false);
         }
       },
-      [mx, roomId, alive],
+      [mx, roomId, threadRootId, alive],
     );
 
     const handleStickerSelect = useCallback(
@@ -755,13 +789,13 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
           await getImageUrlBlob(stickerUrl),
         );
 
-        mx.sendEvent(roomId, EventType.Sticker, {
+        mx.sendEvent(roomId, threadRootId ?? null, EventType.Sticker, {
           body: label,
           url: mxc,
           info,
         });
       },
-      [mx, roomId, useAuthentication],
+      [mx, roomId, threadRootId, useAuthentication],
     );
 
     if (room.getType() === 'm.server_notice') {
@@ -954,59 +988,33 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
               <Icon src={Icons.PlusCircle} />
             </IconButton>
           }
-          after={
+          after={(() => {
-            <>
+            const formatButton = showFormat ? (
-              {showFormat && (
+              <IconButton
-                <IconButton
+                key="showFormat"
-                  variant="SurfaceVariant"
+                variant="SurfaceVariant"
-                  size="300"
+                size="300"
-                  radii="300"
+                radii="300"
-                  style={touchTarget}
+                style={touchTarget}
-                  aria-label={toolbar ? 'Hide formatting toolbar' : 'Show formatting toolbar'}
+                aria-label={toolbar ? 'Hide formatting toolbar' : 'Show formatting toolbar'}
-                  aria-pressed={toolbar}
+                aria-pressed={toolbar}
-                  onClick={() => setToolbar(!toolbar)}
+                onClick={() => setToolbar(!toolbar)}
-                >
+              >
-                  <Icon src={toolbar ? Icons.AlphabetUnderline : Icons.Alphabet} />
+                <Icon src={toolbar ? Icons.AlphabetUnderline : Icons.Alphabet} />
-                </IconButton>
+              </IconButton>
-              )}
+            ) : null;
-              {(showEmoji || showSticker) && (
+
-                <UseStateProvider initial={undefined}>
+            // Emoji and Sticker share a single EmojiBoard PopOut anchored to the
-                  {(emojiBoardTab: EmojiBoardTab | undefined, setEmojiBoardTab) => (
+            // emoji button, so they are rendered together as one unit. Their
-                    <PopOut
+            // relative order still follows the saved order.
-                      offset={16}
+            const emojiStickerBlock =
-                      alignOffset={-44}
+              showEmoji || showSticker ? (
-                      position="Top"
+                <UseStateProvider key="showEmojiSticker" initial={undefined}>
-                      align="End"
+                  {(emojiBoardTab: EmojiBoardTab | undefined, setEmojiBoardTab) => {
-                      anchor={
+                    const stickerBtn =
-                        emojiBoardTab === undefined
+                      showSticker && !hideStickerBtn ? (
-                          ? undefined
-                          : (emojiBtnRef.current?.getBoundingClientRect() ?? undefined)
-                      }
-                      content={
-                        <React.Suspense fallback={null}>
-                          <EmojiBoard
-                            tab={emojiBoardTab}
-                            onTabChange={setEmojiBoardTab}
-                            imagePackRooms={imagePackRooms}
-                            returnFocusOnDeactivate={false}
-                            onEmojiSelect={handleEmoticonSelect}
-                            onCustomEmojiSelect={handleEmoticonSelect}
-                            onStickerSelect={handleStickerSelect}
-                            requestClose={() => {
-                              setEmojiBoardTab((t) => {
-                                if (t) {
-                                  if (!mobileOrTablet()) ReactEditor.focus(editor);
-                                  return undefined;
-                                }
-                                return t;
-                              });
-                            }}
-                          />
-                        </React.Suspense>
-                      }
-                    >
-                      {showSticker && !hideStickerBtn && (
                         <IconButton
+                          key="showSticker"
                           aria-pressed={emojiBoardTab === EmojiBoardTab.Sticker}
                           aria-label="Insert sticker"
                           onClick={() => setEmojiBoardTab(EmojiBoardTab.Sticker)}
@@ -1020,36 +1028,76 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
                             filled={emojiBoardTab === EmojiBoardTab.Sticker}
                           />
                         </IconButton>
-                      )}
+                      ) : null;
-                      {showEmoji && (
+                    const emojiBtn = showEmoji ? (
-                        <IconButton
+                      <IconButton
-                          ref={emojiBtnRef}
+                        key="showEmoji"
-                          aria-label="Insert emoji"
+                        ref={emojiBtnRef}
-                          aria-pressed={
+                        aria-label="Insert emoji"
+                        aria-pressed={
+                          hideStickerBtn ? !!emojiBoardTab : emojiBoardTab === EmojiBoardTab.Emoji
+                        }
+                        onClick={() => setEmojiBoardTab(EmojiBoardTab.Emoji)}
+                        variant="SurfaceVariant"
+                        size="300"
+                        radii="300"
+                        style={touchTarget}
+                      >
+                        <Icon
+                          src={Icons.Smile}
+                          filled={
                             hideStickerBtn ? !!emojiBoardTab : emojiBoardTab === EmojiBoardTab.Emoji
                           }
-                          onClick={() => setEmojiBoardTab(EmojiBoardTab.Emoji)}
+                        />
-                          variant="SurfaceVariant"
+                      </IconButton>
-                          size="300"
+                    ) : null;
-                          radii="300"
+                    const emojiFirst =
-                          style={touchTarget}
+                      composerButtonOrder.indexOf('showEmoji') <
-                        >
+                      composerButtonOrder.indexOf('showSticker');
-                          <Icon
+                    return (
-                            src={Icons.Smile}
+                      <PopOut
-                            filled={
+                        offset={16}
-                              hideStickerBtn
+                        alignOffset={-44}
-                                ? !!emojiBoardTab
+                        position="Top"
-                                : emojiBoardTab === EmojiBoardTab.Emoji
+                        align="End"
-                            }
+                        anchor={
-                          />
+                          emojiBoardTab === undefined
-                        </IconButton>
+                            ? undefined
-                      )}
+                            : (emojiBtnRef.current?.getBoundingClientRect() ?? undefined)
-                    </PopOut>
+                        }
-                  )}
+                        content={
+                          <React.Suspense fallback={null}>
+                            <EmojiBoard
+                              tab={emojiBoardTab}
+                              onTabChange={setEmojiBoardTab}
+                              imagePackRooms={imagePackRooms}
+                              returnFocusOnDeactivate={false}
+                              onEmojiSelect={handleEmoticonSelect}
+                              onCustomEmojiSelect={handleEmoticonSelect}
+                              onStickerSelect={handleStickerSelect}
+                              requestClose={() => {
+                                setEmojiBoardTab((t) => {
+                                  if (t) {
+                                    if (!mobileOrTablet()) ReactEditor.focus(editor);
+                                    return undefined;
+                                  }
+                                  return t;
+                                });
+                              }}
+                            />
+                          </React.Suspense>
+                        }
+                      >
+                        {emojiFirst ? [emojiBtn, stickerBtn] : [stickerBtn, emojiBtn]}
+                      </PopOut>
+                    );
+                  }}
                 </UseStateProvider>
-              )}
+              ) : null;
-              {!!gifApiKey && showGif && (
+
-                <UseStateProvider initial={false}>
+            const gifButton =
+              !!gifApiKey && showGif ? (
+                <UseStateProvider key="showGif" initial={false}>
                   {(gifOpen: boolean, setGifOpen) => (
                     <PopOut
                       offset={16}
@@ -1101,113 +1149,163 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
                     </PopOut>
                   )}
                 </UseStateProvider>
-              )}
+              ) : null;
-              {gifError && (
+
-                <Text
+            const locationButton = showLocation ? (
-                  size="T200"
-                  style={{
-                    color: color.Critical.Main,
-                    padding: '2px 6px',
-                    alignSelf: 'center',
-                    whiteSpace: 'nowrap',
-                  }}
-                >
-                  {gifError}
-                </Text>
-              )}
-              {locationError && (
-                <Text
-                  size="T200"
-                  style={{
-                    color: color.Critical.Main,
-                    padding: '2px 6px',
-                    alignSelf: 'center',
-                    whiteSpace: 'nowrap',
-                  }}
-                >
-                  {locationError}
-                </Text>
-              )}
-              {showLocation && (
-                <IconButton
-                  onClick={handleShareLocation}
-                  disabled={locating}
-                  aria-label="Share location"
-                  variant="SurfaceVariant"
-                  size="300"
-                  radii="300"
-                  title="Share location"
-                  style={touchTarget}
-                >
-                  {locating ? (
-                    <Spinner variant="Secondary" size="100" />
-                  ) : (
-                    <Icon src={Icons.SpaceGlobe} size="100" />
-                  )}
-                </IconButton>
-              )}
-              {showPoll && (
-                <IconButton
-                  onClick={() => setPollOpen(true)}
-                  aria-label="Create poll"
-                  variant="SurfaceVariant"
-                  size="300"
-                  radii="300"
-                  title="Create poll"
-                  style={touchTarget}
-                >
-                  <Icon src={Icons.OrderList} size="100" />
-                </IconButton>
-              )}
-              {showVoice && (
-                <VoiceMessageRecorder
-                  onSend={handleVoiceSend}
-                  onError={(err) => {
-                    setLocationError(err);
-                    setTimeout(() => setLocationError(null), 4000);
-                  }}
-                />
-              )}
-              {charCount > 0 && (
-                <Text
-                  size="T200"
-                  priority="300"
-                  style={{
-                    padding: `0 ${config.space.S100}`,
-                    alignSelf: 'center',
-                    userSelect: 'none',
-                    minWidth: '2rem',
-                    textAlign: 'right',
-                  }}
-                >
-                  {charCount}
-                </Text>
-              )}
-              {showSchedule && (
-                <IconButton
-                  onClick={handleScheduleClick}
-                  variant="SurfaceVariant"
-                  size="300"
-                  radii="300"
-                  style={touchTarget}
-                  aria-label="Schedule message"
-                  title="Schedule message"
-                >
-                  <Icon src={Icons.Clock} size="100" />
-                </IconButton>
-              )}
               <IconButton
-                onClick={submit}
+                key="showLocation"
+                onClick={handleShareLocation}
+                disabled={locating}
+                aria-label="Share location"
+                variant="SurfaceVariant"
+                size="300"
+                radii="300"
+                title="Share location"
+                style={touchTarget}
+              >
+                {locating ? (
+                  <Spinner variant="Secondary" size="100" />
+                ) : (
+                  <Icon src={Icons.SpaceGlobe} size="100" />
+                )}
+              </IconButton>
+            ) : null;
+
+            const pollButton = showPoll ? (
+              <IconButton
+                key="showPoll"
+                onClick={() => setPollOpen(true)}
+                aria-label="Create poll"
+                variant="SurfaceVariant"
+                size="300"
+                radii="300"
+                title="Create poll"
+                style={touchTarget}
+              >
+                <Icon src={Icons.OrderList} size="100" />
+              </IconButton>
+            ) : null;
+
+            const voiceButton = showVoice ? (
+              <VoiceMessageRecorder
+                key="showVoice"
+                onSend={handleVoiceSend}
+                onError={(err) => {
+                  setLocationError(err);
+                  setTimeout(() => setLocationError(null), 4000);
+                }}
+              />
+            ) : null;
+
+            const scheduleButton = showSchedule ? (
+              <IconButton
+                key="showSchedule"
+                onClick={handleScheduleClick}
                 variant="SurfaceVariant"
                 size="300"
                 radii="300"
                 style={touchTarget}
-                aria-label="Send message"
+                aria-label="Schedule message"
+                title="Schedule message"
               >
-                <Icon src={Icons.Send} />
+                <Icon src={Icons.Clock} size="100" />
               </IconButton>
-            </>
+            ) : null;
-          }
+
+            const orderedButtons: ReactNode[] = [];
+            let emojiStickerRendered = false;
+            composerButtonOrder.forEach((key: ComposerToolbarButtonKey) => {
+              switch (key) {
+                case 'showFormat':
+                  if (formatButton) orderedButtons.push(formatButton);
+                  break;
+                case 'showEmoji':
+                case 'showSticker':
+                  // Rendered once as a combined unit at whichever of the two
+                  // keys comes first in the order.
+                  if (!emojiStickerRendered) {
+                    emojiStickerRendered = true;
+                    if (emojiStickerBlock) orderedButtons.push(emojiStickerBlock);
+                  }
+                  break;
+                case 'showGif':
+                  if (gifButton) orderedButtons.push(gifButton);
+                  break;
+                case 'showLocation':
+                  if (locationButton) orderedButtons.push(locationButton);
+                  break;
+                case 'showPoll':
+                  if (pollButton) orderedButtons.push(pollButton);
+                  break;
+                case 'showVoice':
+                  if (voiceButton) orderedButtons.push(voiceButton);
+                  break;
+                case 'showSchedule':
+                  if (scheduleButton) orderedButtons.push(scheduleButton);
+                  break;
+                default:
+                  break;
+              }
+            });
+
+            return (
+              <>
+                {orderedButtons}
+                {gifError && (
+                  <Text
+                    size="T200"
+                    style={{
+                      color: color.Critical.Main,
+                      padding: '2px 6px',
+                      alignSelf: 'center',
+                      whiteSpace: 'nowrap',
+                    }}
+                  >
+                    {gifError}
+                  </Text>
+                )}
+                {locationError && (
+                  <Text
+                    size="T200"
+                    style={{
+                      color: color.Critical.Main,
+                      padding: '2px 6px',
+                      alignSelf: 'center',
+                      whiteSpace: 'nowrap',
+                    }}
+                  >
+                    {locationError}
+                  </Text>
+                )}
+                <DraftIndicator roomId={draftKey} />
+                {charCount > 0 && (
+                  <Text
+                    size="T200"
+                    priority="300"
+                    style={{
+                      padding: `0 ${config.space.S100}`,
+                      alignSelf: 'center',
+                      userSelect: 'none',
+                      minWidth: '2rem',
+                      textAlign: 'right',
+                    }}
+                  >
+                    {charCount}
+                  </Text>
+                )}
+                <IconButton
+                  onClick={submit}
+                  variant="SurfaceVariant"
+                  size="300"
+                  radii="300"
+                  style={touchTarget}
+                  aria-label="Send message"
+                >
+                  <Icon src={Icons.Send} />
+                </IconButton>
+              </>
+            );
+          })()}
           bottom={
             toolbar && (
               <div>

src/app/features/room/RoomTimeline.tsx

@@ -18,9 +18,11 @@ import {
   IContent,
   MatrixClient,
   MatrixEvent,
+  RelationType,
   Room,
   RoomEvent,
   RoomEventHandlerMap,
+  ThreadEvent,
 } from 'matrix-js-sdk';
 import { HTMLReactParserOptions } from 'html-react-parser';
 import classNames from 'classnames';
@@ -103,6 +105,8 @@ import * as css from './RoomTimeline.css';
 import { inSameDay, minuteDifference, timeDayMonthYear, today, yesterday } from '../../utils/time';
 import { createMentionElement, isEmptyEditor, moveCursor } from '../../components/editor';
 import { roomIdToReplyDraftAtomFamily } from '../../state/room/roomInputDrafts';
+import { roomIdToActiveThreadIdAtomFamily } from '../../state/room/thread';
+import { ThreadSummary } from './thread/ThreadSummary';
 import { usePowerLevelsContext } from '../../hooks/usePowerLevels';
 import { GetContentCallback, MessageEvent, StateEvent } from '../../../types/matrix/room';
 import { useKeyDown } from '../../hooks/useKeyDown';
@@ -245,13 +249,26 @@ const useEventTimelineLoader = (
   room: Room,
   onLoad: (eventId: string, linkedTimelines: EventTimeline[], evtAbsIndex: number) => void,
   onError: (err: Error | null) => void,
+  onThreadRedirect: (threadRootId: string) => void,
 ) => {
   const loadEventTimeline = useCallback(
     async (eventId: string) => {
       const [err, replyEvtTimeline] = await to(
         mx.getEventTimeline(room.getUnfilteredTimelineSet(), eventId),
       );
+      // Thread events aren't locatable in the main timeline set (getEventTimeline
+      // returns undefined / no abs index). Best-effort: redirect to the thread panel
+      // when the fetched event belongs to a thread instead of surfacing an error.
+      const redirectToThread = () => {
+        const threadRootId = room.findEventById(eventId)?.threadRootId;
+        if (threadRootId) {
+          onThreadRedirect(threadRootId);
+          return true;
+        }
+        return false;
+      };
       if (!replyEvtTimeline) {
+        if (redirectToThread()) return;
         onError(err ?? null);
         return;
       }
@@ -259,13 +276,14 @@ const useEventTimelineLoader = (
       const absIndex = getEventIdAbsoluteIndex(linkedTimelines, replyEvtTimeline, eventId);
 
       if (absIndex === undefined) {
+        if (redirectToThread()) return;
         onError(err ?? null);
         return;
       }
 
       onLoad(eventId, linkedTimelines, absIndex);
     },
-    [mx, room, onLoad, onError],
+    [mx, room, onLoad, onError, onThreadRedirect],
   );
 
   return loadEventTimeline;
@@ -460,6 +478,20 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
   const ignoredUsersSet = useMemo(() => new Set(ignoredUsersList), [ignoredUsersList]);
 
   const setReplyDraft = useSetAtom(roomIdToReplyDraftAtomFamily(room.roomId));
+  const setActiveThreadId = useSetAtom(roomIdToActiveThreadIdAtomFamily(room.roomId));
+  // Thread summary chips only mount for events that already carry thread data
+  // (perf: a chip subscribes room-level listeners, so mounting one per rendered
+  // message would exceed the SDK's emitter cap). This single room-level
+  // ThreadEvent.New subscription re-renders the timeline once when a brand-new
+  // thread appears, so the root's chip shows up without unrelated activity.
+  const [, setThreadNewTick] = useState(0);
+  useEffect(() => {
+    const handleThreadNew = () => setThreadNewTick((c) => c + 1);
+    room.on(ThreadEvent.New, handleThreadNew);
+    return () => {
+      room.removeListener(ThreadEvent.New, handleThreadNew);
+    };
+  }, [room]);
   const powerLevels = usePowerLevelsContext();
   const creators = useRoomCreators(room);
 
@@ -622,6 +654,13 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
       scrollToBottomRef.current.count += 1;
       scrollToBottomRef.current.smooth = false;
     }, [alive, room]),
+    useCallback(
+      (threadRootId: string) => {
+        if (!alive()) return;
+        setActiveThreadId(threadRootId);
+      },
+      [alive, setActiveThreadId],
+    ),
   );
 
   useLiveEventArrive(
@@ -982,14 +1021,17 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
         console.warn('Button should have "data-event-id" attribute!');
         return;
       }
+      if (startThread) {
+        // Open the thread panel instead of arming an m.thread reply in the main composer.
+        setActiveThreadId(replyId);
+        return;
+      }
       const replyEvt = room.findEventById(replyId);
       if (!replyEvt) return;
       const editedReply = getEditedEvent(replyId, replyEvt, room.getUnfilteredTimelineSet());
       const content: IContent = editedReply?.getContent()['m.new_content'] ?? replyEvt.getContent();
       const { body, formatted_body: formattedBody } = content;
-      const { 'm.relates_to': relation } = startThread
+      const { 'm.relates_to': relation } = replyEvt.getWireContent();
-        ? { 'm.relates_to': { rel_type: 'm.thread', event_id: replyId } }
-        : replyEvt.getWireContent();
       const senderId = replyEvt.getSender();
       if (senderId && typeof body === 'string') {
         setReplyDraft({
@@ -1002,7 +1044,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
         setTimeout(() => ReactEditor.focus(editor), 100);
       }
     },
-    [room, setReplyDraft, editor],
+    [room, setReplyDraft, setActiveThreadId, editor],
   );
 
   const handleReactionToggle = useCallback(
@@ -1090,6 +1132,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
                   replyEventId={replyEventId}
                   threadRootId={threadRootId}
                   onClick={handleOpenReply}
+                  onThreadClick={setActiveThreadId}
                   getMemberPowerTag={getMemberPowerTag}
                   accessibleTagColors={accessiblePowerTagColors}
                   legacyUsernameColor={legacyUsernameColor || direct}
@@ -1097,16 +1140,23 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
               )
             }
             reactions={
-              reactionRelations && (
+              <>
-                <Reactions
+                {reactionRelations && (
-                  style={{ marginTop: config.space.S200 }}
+                  <Reactions
-                  room={room}
+                    style={{ marginTop: config.space.S200 }}
-                  relations={reactionRelations}
+                    room={room}
-                  mEventId={mEventId}
+                    relations={reactionRelations}
-                  canSendReaction={canSendReaction}
+                    mEventId={mEventId}
-                  onReactionToggle={handleReactionToggle}
+                    canSendReaction={canSendReaction}
-                />
+                    onReactionToggle={handleReactionToggle}
-              )
+                  />
+                )}
+                {(!threadRootId || threadRootId === mEventId) &&
+                  (mEvent.getThread() !== undefined ||
+                    mEvent.getServerAggregatedRelation(RelationType.Thread) !== undefined) && (
+                    <ThreadSummary rootEvent={mEvent} room={room} onOpen={setActiveThreadId} />
+                  )}
+              </>
             }
             hideReadReceipts={hideActivity}
             showDeveloperTools={showDeveloperTools}
@@ -1175,6 +1225,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
                   replyEventId={replyEventId}
                   threadRootId={threadRootId}
                   onClick={handleOpenReply}
+                  onThreadClick={setActiveThreadId}
                   getMemberPowerTag={getMemberPowerTag}
                   accessibleTagColors={accessiblePowerTagColors}
                   legacyUsernameColor={legacyUsernameColor || direct}
@@ -1182,16 +1233,23 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
               )
             }
             reactions={
-              reactionRelations && (
+              <>
-                <Reactions
+                {reactionRelations && (
-                  style={{ marginTop: config.space.S200 }}
+                  <Reactions
-                  room={room}
+                    style={{ marginTop: config.space.S200 }}
-                  relations={reactionRelations}
+                    room={room}
-                  mEventId={mEventId}
+                    relations={reactionRelations}
-                  canSendReaction={canSendReaction}
+                    mEventId={mEventId}
-                  onReactionToggle={handleReactionToggle}
+                    canSendReaction={canSendReaction}
-                />
+                    onReactionToggle={handleReactionToggle}
-              )
+                  />
+                )}
+                {(!threadRootId || threadRootId === mEventId) &&
+                  (mEvent.getThread() !== undefined ||
+                    mEvent.getServerAggregatedRelation(RelationType.Thread) !== undefined) && (
+                    <ThreadSummary rootEvent={mEvent} room={room} onOpen={setActiveThreadId} />
+                  )}
+              </>
             }
             hideReadReceipts={hideActivity}
             showDeveloperTools={showDeveloperTools}

src/app/features/room/thread/ThreadPanel.css.ts

@@ -0,0 +1,30 @@
+import { style } from '@vanilla-extract/css';
+import { config, toRem } from 'folds';
+
+export const ThreadPanel = style({
+  width: toRem(360),
+  '@media': {
+    '(max-width: 750px)': {
+      position: 'fixed',
+      inset: 0,
+      width: '100%',
+      zIndex: 500,
+    },
+  },
+});
+
+export const ThreadPanelHeader = style({
+  flexShrink: 0,
+  padding: `0 ${config.space.S200} 0 ${config.space.S300}`,
+  borderBottomWidth: config.borderWidth.B300,
+});
+
+export const ThreadPanelContent = style({
+  position: 'relative',
+  overflow: 'hidden',
+});
+
+export const ThreadPanelInput = style({
+  padding: config.space.S200,
+  borderTopWidth: config.borderWidth.B300,
+});

src/app/features/room/thread/ThreadPanel.tsx

@@ -0,0 +1,202 @@
+import React, { useCallback, useEffect, useRef } from 'react';
+import {
+  Box,
+  Header,
+  Icon,
+  IconButton,
+  Icons,
+  Spinner,
+  Text,
+  Tooltip,
+  TooltipProvider,
+} from 'folds';
+import { Room, RoomEvent, ThreadEvent } from 'matrix-js-sdk';
+import { isKeyHotkey } from 'is-hotkey';
+import classNames from 'classnames';
+import * as css from './ThreadPanel.css';
+import { ContainerColor } from '../../../styles/ContainerColor.css';
+import { ThreadTimeline } from './ThreadTimeline';
+import { markThreadAsRead, useThreadInstance } from './useThread';
+import { useMatrixClient } from '../../../hooks/useMatrixClient';
+import { useEditor } from '../../../components/editor';
+import { useKeyDown } from '../../../hooks/useKeyDown';
+import { useSetting } from '../../../state/hooks/settings';
+import { settingsAtom } from '../../../state/settings';
+import { RoomInput } from '../RoomInput';
+import {
+  getThreadNotificationModeIcon,
+  ThreadNotificationModeSwitcher,
+} from '../../../components/ThreadNotificationModeSwitcher';
+import { useThreadNotificationMode } from '../../../hooks/useThreadNotifications';
+import { ThreadNotificationMode } from '../../../utils/threadNotifications';
+
+type ThreadPanelHeaderProps = {
+  room: Room;
+  threadId: string;
+  requestClose: () => void;
+};
+function ThreadPanelHeader({ room, threadId, requestClose }: ThreadPanelHeaderProps) {
+  const mode = useThreadNotificationMode(room.roomId, threadId);
+
+  return (
+    <Header className={css.ThreadPanelHeader} variant="Background" size="600">
+      <Box grow="Yes" alignItems="Center" gap="200">
+        <Box grow="Yes" direction="Column">
+          <Text size="H5" truncate>
+            Thread
+          </Text>
+          <Text size="T200" truncate style={{ opacity: 0.65 }}>
+            {room.name}
+          </Text>
+        </Box>
+        <Box shrink="No" alignItems="Center" gap="100">
+          <ThreadNotificationModeSwitcher roomId={room.roomId} threadId={threadId} value={mode}>
+            {(handleOpen, opened) => (
+              <TooltipProvider
+                position="Bottom"
+                align="End"
+                offset={4}
+                tooltip={
+                  <Tooltip>
+                    <Text>Notifications</Text>
+                  </Tooltip>
+                }
+              >
+                {(triggerRef) => (
+                  <IconButton
+                    ref={triggerRef}
+                    variant="Background"
+                    aria-label="Thread notifications"
+                    aria-pressed={opened}
+                    onClick={handleOpen}
+                  >
+                    <Icon
+                      src={getThreadNotificationModeIcon(mode)}
+                      filled={mode !== ThreadNotificationMode.Default}
+                    />
+                  </IconButton>
+                )}
+              </TooltipProvider>
+            )}
+          </ThreadNotificationModeSwitcher>
+          <TooltipProvider
+            position="Bottom"
+            align="End"
+            offset={4}
+            tooltip={
+              <Tooltip>
+                <Text>Close</Text>
+              </Tooltip>
+            }
+          >
+            {(triggerRef) => (
+              <IconButton
+                ref={triggerRef}
+                variant="Background"
+                aria-label="Close thread"
+                onClick={requestClose}
+              >
+                <Icon src={Icons.Cross} />
+              </IconButton>
+            )}
+          </TooltipProvider>
+        </Box>
+      </Box>
+    </Header>
+  );
+}
+
+export type ThreadPanelProps = {
+  room: Room;
+  threadId: string;
+  requestClose: () => void;
+};
+export function ThreadPanel({ room, threadId, requestClose }: ThreadPanelProps) {
+  const mx = useMatrixClient();
+  const editor = useEditor();
+  const thread = useThreadInstance(room, threadId);
+  const [privateReadReceipts] = useSetting(settingsAtom, 'privateReadReceipts');
+  const fileDropContainerRef = useRef<HTMLDivElement>(null) as React.RefObject<HTMLDivElement>;
+
+  useKeyDown(
+    window,
+    useCallback(
+      (evt) => {
+        if (isKeyHotkey('escape', evt)) {
+          evt.preventDefault();
+          evt.stopPropagation();
+          requestClose();
+        }
+      },
+      [requestClose],
+    ),
+  );
+
+  // Mark the thread read when the panel is open and on each new thread event.
+  // Deduped on the latest event id: RoomEvent.Timeline re-emits per event during
+  // backfill and for every edit/reaction, and sendReadReceipt POSTs
+  // unconditionally — without the guard, opening a thread with N replies would
+  // fire up to N receipt requests at the same event.
+  const lastReadEventIdRef = useRef<string | undefined>(undefined);
+  useEffect(() => {
+    lastReadEventIdRef.current = undefined;
+    if (!thread) return undefined;
+    const markRead = () => {
+      const events = thread.liveTimeline.getEvents();
+      let latestId: string | undefined;
+      for (let i = events.length - 1; i >= 0; i -= 1) {
+        const evt = events[i];
+        if (evt && !evt.isSending()) {
+          latestId = evt.getId() ?? undefined;
+          break;
+        }
+      }
+      if (!latestId || latestId === lastReadEventIdRef.current) return;
+      lastReadEventIdRef.current = latestId;
+      markThreadAsRead(mx, thread, privateReadReceipts).catch(() => {
+        // Allow a retry on the next event if the receipt POST failed.
+        if (lastReadEventIdRef.current === latestId) {
+          lastReadEventIdRef.current = undefined;
+        }
+      });
+    };
+    markRead();
+    thread.on(ThreadEvent.NewReply, markRead);
+    thread.on(RoomEvent.Timeline, markRead);
+    return () => {
+      thread.off(ThreadEvent.NewReply, markRead);
+      thread.off(RoomEvent.Timeline, markRead);
+    };
+  }, [mx, thread, privateReadReceipts]);
+
+  return (
+    <Box
+      className={classNames(css.ThreadPanel, ContainerColor({ variant: 'Background' }))}
+      shrink="No"
+      direction="Column"
+    >
+      <ThreadPanelHeader room={room} threadId={threadId} requestClose={requestClose} />
+      {!thread ? (
+        <Box grow="Yes" alignItems="Center" justifyContent="Center" gap="200">
+          <Spinner size="400" variant="Secondary" />
+          <Text size="T300">Loading thread…</Text>
+        </Box>
+      ) : (
+        <>
+          <Box grow="Yes" className={css.ThreadPanelContent} direction="Column">
+            <ThreadTimeline room={room} thread={thread} editor={editor} />
+          </Box>
+          <Box className={css.ThreadPanelInput} shrink="No" direction="Column">
+            <RoomInput
+              room={room}
+              roomId={room.roomId}
+              threadRootId={threadId}
+              editor={editor}
+              fileDropContainerRef={fileDropContainerRef}
+            />
+          </Box>
+        </>
+      )}
+    </Box>
+  );
+}

src/app/features/room/thread/ThreadSummary.tsx

@@ -0,0 +1,51 @@
+import React from 'react';
+import { Badge, Box, Chip, Icon, Icons, Text, config } from 'folds';
+import { MatrixEvent, Room } from 'matrix-js-sdk';
+import { useThreadSummary } from '../../../hooks/useThreadSummary';
+import { useSetting } from '../../../state/hooks/settings';
+import { settingsAtom } from '../../../state/settings';
+import { timeDayMonthYear, timeHourMinute, today } from '../../../utils/time';
+import { ThreadNotificationMode } from '../../../utils/threadNotifications';
+
+type ThreadSummaryProps = {
+  rootEvent: MatrixEvent;
+  room: Room;
+  onOpen: (threadId: string) => void;
+};
+export function ThreadSummary({ rootEvent, room, onOpen }: ThreadSummaryProps) {
+  const { summary, unread, mode } = useThreadSummary(rootEvent, room);
+  const [hour24Clock] = useSetting(settingsAtom, 'hour24Clock');
+
+  if (!summary || summary.count === 0) return null;
+
+  const { count, latestTs } = summary;
+  const latestStr =
+    latestTs !== undefined
+      ? today(latestTs)
+        ? timeHourMinute(latestTs, hour24Clock)
+        : timeDayMonthYear(latestTs)
+      : undefined;
+
+  return (
+    <Box style={{ marginTop: config.space.S200 }}>
+      <Chip
+        variant="SurfaceVariant"
+        radii="300"
+        before={<Icon size="50" src={Icons.Thread} />}
+        after={
+          unread > 0 ? <Badge variant="Success" fill="Solid" radii="Pill" size="200" /> : undefined
+        }
+        onClick={() => {
+          const threadId = rootEvent.getId();
+          if (threadId) onOpen(threadId);
+        }}
+      >
+        <Text size="T200">
+          {count === 1 ? '1 reply' : `${count} replies`}
+          {latestStr ? ` · ${latestStr}` : ''}
+        </Text>
+        {mode === ThreadNotificationMode.Mute && <Icon size="50" src={Icons.BellMute} />}
+      </Chip>
+    </Box>
+  );
+}

src/app/features/room/thread/ThreadTimeline.css.ts

@@ -0,0 +1,39 @@
+import { style } from '@vanilla-extract/css';
+import { color, config } from 'folds';
+
+export const ThreadTimeline = style({
+  height: '100%',
+  position: 'relative',
+});
+
+export const ThreadTimelineContent = style({
+  minHeight: '100%',
+  padding: `${config.space.S400} 0`,
+});
+
+export const ThreadCentered = style({
+  height: '100%',
+  padding: config.space.S700,
+});
+
+export const RootMessage = style({
+  backgroundColor: color.SurfaceVariant.Container,
+  borderRadius: config.radii.R400,
+  marginBottom: config.space.S100,
+});
+
+export const RepliesDivider = style({
+  padding: `${config.space.S200} ${config.space.S400}`,
+});
+
+export const NoReplies = style({
+  padding: config.space.S400,
+});
+
+export const PendingMessage = style({
+  opacity: 0.6,
+});
+
+export const PendingFailed = style({
+  opacity: 1,
+});

src/app/features/room/thread/ThreadTimeline.tsx

@@ -0,0 +1,961 @@
+import React, {
+  Dispatch,
+  MouseEventHandler,
+  ReactNode,
+  SetStateAction,
+  useCallback,
+  useEffect,
+  useLayoutEffect,
+  useMemo,
+  useRef,
+  useState,
+} from 'react';
+import {
+  Direction,
+  EventStatus,
+  EventTimeline,
+  EventTimelineSet,
+  EventTimelineSetHandlerMap,
+  MatrixClient,
+  MatrixEvent,
+  RelationType,
+  Room,
+  RoomEvent,
+  Thread,
+  ThreadEvent,
+} from 'matrix-js-sdk';
+import { HTMLReactParserOptions } from 'html-react-parser';
+import { Editor } from 'slate';
+import { ReactEditor } from 'slate-react';
+import to from 'await-to-js';
+import { useAtomValue, useSetAtom } from 'jotai';
+import { Badge, Box, Line, Scroll, Spinner, Text, color, config } from 'folds';
+import classNames from 'classnames';
+import { Opts as LinkifyOpts } from 'linkifyjs';
+import { eventWithShortcode, factoryEventSentBy, getMxIdLocalPart } from '../../../utils/matrix';
+import { useMatrixClient } from '../../../hooks/useMatrixClient';
+import { useVirtualPaginator, ItemRange } from '../../../hooks/useVirtualPaginator';
+import { useAlive } from '../../../hooks/useAlive';
+import { scrollToBottom } from '../../../utils/dom';
+import {
+  DefaultPlaceholder,
+  MessageBase,
+  Reply,
+  RedactedContent,
+  MSticker,
+  MessageUnsupportedContent,
+  MessageNotDecryptedContent,
+  ImageContent,
+} from '../../../components/message';
+import {
+  factoryRenderLinkifyWithMention,
+  getReactCustomHtmlParser,
+  LINKIFY_OPTS,
+  makeMentionCustomProps,
+  renderMatrixMention,
+} from '../../../plugins/react-custom-html-parser';
+import {
+  decryptAllTimelineEvent,
+  getEditedEvent,
+  getEventReactions,
+  getMemberDisplayName,
+  getReactionContent,
+  reactionOrEditEvent,
+} from '../../../utils/room';
+import { useSetting } from '../../../state/hooks/settings';
+import { MessageLayout, settingsAtom } from '../../../state/settings';
+import { Message, Reactions, EncryptedContent } from '../message';
+import { RenderMessageContent } from '../../../components/RenderMessageContent';
+import { Image } from '../../../components/media';
+import { ImageViewer } from '../../../components/image-viewer';
+import * as css from './ThreadTimeline.css';
+import {
+  inSameDay,
+  minuteDifference,
+  timeDayMonthYear,
+  today,
+  yesterday,
+} from '../../../utils/time';
+import { createMentionElement, moveCursor } from '../../../components/editor';
+import { roomIdToReplyDraftAtomFamily } from '../../../state/room/roomInputDrafts';
+import { usePowerLevelsContext } from '../../../hooks/usePowerLevels';
+import { GetContentCallback, MessageEvent, StateEvent } from '../../../../types/matrix/room';
+import {
+  getIntersectionObserverEntry,
+  useIntersectionObserver,
+} from '../../../hooks/useIntersectionObserver';
+import { useMentionClickHandler } from '../../../hooks/useMentionClickHandler';
+import { useSpoilerClickHandler } from '../../../hooks/useSpoilerClickHandler';
+import { useMediaAuthentication } from '../../../hooks/useMediaAuthentication';
+import { useIgnoredUsers } from '../../../hooks/useIgnoredUsers';
+import { useImagePackRooms } from '../../../hooks/useImagePackRooms';
+import { useIsDirectRoom } from '../../../hooks/useRoom';
+import { useOpenUserRoomProfile } from '../../../state/hooks/userRoomProfile';
+import { useSpaceOptionally } from '../../../hooks/useSpace';
+import { useRoomCreators } from '../../../hooks/useRoomCreators';
+import { useRoomPermissions } from '../../../hooks/useRoomPermissions';
+import {
+  useAccessiblePowerTagColors,
+  useGetMemberPowerTag,
+} from '../../../hooks/useMemberPowerTag';
+import { useTheme } from '../../../hooks/useTheme';
+import { useRoomCreatorsTag } from '../../../hooks/useRoomCreatorsTag';
+import { usePowerLevelTags } from '../../../hooks/usePowerLevelTags';
+import { roomToParentsAtom } from '../../../state/room/roomToParents';
+import { EditHistoryModal } from '../message/EditHistoryModal';
+import {
+  getLinkedTimelines,
+  getTimelineAndBaseIndex,
+  getTimelineEvent,
+  getTimelineRelativeIndex,
+  getTimelinesEventsCount,
+  timelineToEventsCount,
+} from '../RoomTimeline';
+import { getThreadDraftKey } from '../../../state/room/thread';
+import { useThreadLinkedTimelines, useThreadPendingEvents } from './useThread';
+
+// Virtual window size (how many items render around the viewport).
+const PAGINATION_LIMIT = 50;
+// Network page size for backward /relations pagination of the thread timeline.
+const THREAD_PAGE_LIMIT = 30;
+
+type Timeline = {
+  linkedTimelines: EventTimeline[];
+  range: ItemRange;
+};
+
+const getEmptyTimeline = (): Timeline => ({
+  linkedTimelines: [],
+  range: { start: 0, end: 0 },
+});
+
+const getInitialThreadTimeline = (thread: Thread, timelines?: EventTimeline[]): Timeline => {
+  const linkedTimelines =
+    timelines && timelines.length > 0 ? timelines : getLinkedTimelines(thread.liveTimeline);
+  const evLength = getTimelinesEventsCount(linkedTimelines);
+  return {
+    linkedTimelines,
+    range: {
+      start: Math.max(evLength - PAGINATION_LIMIT, 0),
+      end: evLength,
+    },
+  };
+};
+
+/**
+ * Copy of RoomTimeline's `useTimelinePagination` pattern (not exported from RoomTimeline
+ * as its ~35 hooks are hardwired to the room live timeline). Works transparently against
+ * the thread timeline's /relations pagination.
+ */
+const useThreadTimelinePagination = (
+  mx: MatrixClient,
+  timeline: Timeline,
+  setTimeline: Dispatch<SetStateAction<Timeline>>,
+  limit: number,
+) => {
+  const timelineRef = useRef(timeline);
+  timelineRef.current = timeline;
+  const alive = useAlive();
+
+  const handleTimelinePagination = useMemo(() => {
+    let fetching = false;
+
+    const recalibratePagination = (
+      linkedTimelines: EventTimeline[],
+      timelinesEventsCount: number[],
+      backwards: boolean,
+    ) => {
+      const topTimeline = linkedTimelines[0];
+      const timelineMatch = (mt: EventTimeline) => (t: EventTimeline) => t === mt;
+
+      const newLTimelines = getLinkedTimelines(topTimeline);
+      const topTmIndex = newLTimelines.findIndex(timelineMatch(topTimeline));
+      const topAddedTm = topTmIndex === -1 ? [] : newLTimelines.slice(0, topTmIndex);
+
+      const topTmAddedEvt =
+        timelineToEventsCount(newLTimelines[topTmIndex]) - timelinesEventsCount[0];
+      const offsetRange = getTimelinesEventsCount(topAddedTm) + (backwards ? topTmAddedEvt : 0);
+
+      setTimeline((currentTimeline) => ({
+        linkedTimelines: newLTimelines,
+        range:
+          offsetRange > 0
+            ? {
+                start: currentTimeline.range.start + offsetRange,
+                end: currentTimeline.range.end + offsetRange,
+              }
+            : { ...currentTimeline.range },
+      }));
+    };
+
+    return async (backwards: boolean) => {
+      if (fetching) return;
+      const { linkedTimelines: lTimelines } = timelineRef.current;
+      const timelinesEventsCount = lTimelines.map(timelineToEventsCount);
+
+      const timelineToPaginate = backwards ? lTimelines[0] : lTimelines[lTimelines.length - 1];
+      if (!timelineToPaginate) return;
+
+      const paginationToken = timelineToPaginate.getPaginationToken(
+        backwards ? Direction.Backward : Direction.Forward,
+      );
+      if (
+        !paginationToken &&
+        getTimelinesEventsCount(lTimelines) !==
+          getTimelinesEventsCount(getLinkedTimelines(timelineToPaginate))
+      ) {
+        recalibratePagination(lTimelines, timelinesEventsCount, backwards);
+        return;
+      }
+
+      fetching = true;
+      const [err] = await to(
+        mx.paginateEventTimeline(timelineToPaginate, {
+          backwards,
+          limit,
+        }),
+      );
+      if (err) {
+        fetching = false;
+        return;
+      }
+      const fetchedTimeline =
+        timelineToPaginate.getNeighbouringTimeline(
+          backwards ? Direction.Backward : Direction.Forward,
+        ) ?? timelineToPaginate;
+      // Decrypt all event ahead of render cycle
+      const roomId = fetchedTimeline.getRoomId();
+      const room = roomId ? mx.getRoom(roomId) : null;
+
+      if (room?.hasEncryptionStateEvent()) {
+        await to(decryptAllTimelineEvent(mx, fetchedTimeline));
+      }
+
+      fetching = false;
+      if (alive()) {
+        recalibratePagination(lTimelines, timelinesEventsCount, backwards);
+      }
+    };
+  }, [mx, alive, setTimeline, limit]);
+  return handleTimelinePagination;
+};
+
+export type ThreadTimelineProps = {
+  room: Room;
+  thread: Thread;
+  editor: Editor;
+};
+
+export function ThreadTimeline({ room, thread, editor }: ThreadTimelineProps) {
+  const mx = useMatrixClient();
+  const alive = useAlive();
+  const useAuthentication = useMediaAuthentication();
+
+  const [messageLayout] = useSetting(settingsAtom, 'messageLayout');
+  const [messageSpacing] = useSetting(settingsAtom, 'messageSpacing');
+  const [perMessageProfiles] = useSetting(settingsAtom, 'perMessageProfiles');
+  const [legacyUsernameColor] = useSetting(settingsAtom, 'legacyUsernameColor');
+  const [hideActivity] = useSetting(settingsAtom, 'hideActivity');
+  const [showDeveloperTools] = useSetting(settingsAtom, 'developerTools');
+  const [lotusTerminal] = useSetting(settingsAtom, 'lotusTerminal');
+  const [mediaAutoLoad] = useSetting(settingsAtom, 'mediaAutoLoad');
+  const [urlPreview] = useSetting(settingsAtom, 'urlPreview');
+  const [encUrlPreview] = useSetting(settingsAtom, 'encUrlPreview');
+  const showUrlPreview = room.hasEncryptionStateEvent() ? encUrlPreview : urlPreview;
+  const [hour24Clock] = useSetting(settingsAtom, 'hour24Clock');
+  const [dateFormatString] = useSetting(settingsAtom, 'dateFormatString');
+
+  const direct = useIsDirectRoom();
+  const ignoredUsersList = useIgnoredUsers();
+  const ignoredUsersSet = useMemo(() => new Set(ignoredUsersList), [ignoredUsersList]);
+
+  const setReplyDraft = useSetAtom(
+    roomIdToReplyDraftAtomFamily(getThreadDraftKey(room.roomId, thread.id)),
+  );
+
+  const powerLevels = usePowerLevelsContext();
+  const creators = useRoomCreators(room);
+  const creatorsTag = useRoomCreatorsTag();
+  const powerLevelTags = usePowerLevelTags(room, powerLevels);
+  const getMemberPowerTag = useGetMemberPowerTag(room, creators, powerLevels);
+
+  const theme = useTheme();
+  const accessiblePowerTagColors = useAccessiblePowerTagColors(
+    theme.kind,
+    creatorsTag,
+    powerLevelTags,
+  );
+
+  const permissions = useRoomPermissions(creators, powerLevels);
+  const canRedact = permissions.action('redact', mx.getSafeUserId());
+  const canDeleteOwn = permissions.event(MessageEvent.RoomRedaction, mx.getSafeUserId());
+  const canSendReaction = permissions.event(MessageEvent.Reaction, mx.getSafeUserId());
+  const canPinEvent = permissions.stateEvent(StateEvent.RoomPinnedEvents, mx.getSafeUserId());
+
+  const mentionClickHandler = useMentionClickHandler(room.roomId);
+  const spoilerClickHandler = useSpoilerClickHandler();
+  const openUserRoomProfile = useOpenUserRoomProfile();
+  const space = useSpaceOptionally();
+  const roomToParents = useAtomValue(roomToParentsAtom);
+  const imagePackRooms: Room[] = useImagePackRooms(room.roomId, roomToParents);
+
+  const [editId, setEditId] = useState<string>();
+  const [editHistoryEvent, setEditHistoryEvent] = useState<MatrixEvent | undefined>();
+
+  const linkifyOpts = useMemo<LinkifyOpts>(
+    () => ({
+      ...LINKIFY_OPTS,
+      render: factoryRenderLinkifyWithMention((href) =>
+        renderMatrixMention(mx, room.roomId, href, makeMentionCustomProps(mentionClickHandler)),
+      ),
+    }),
+    [mx, room, mentionClickHandler],
+  );
+  const htmlReactParserOptions = useMemo<HTMLReactParserOptions>(
+    () =>
+      getReactCustomHtmlParser(mx, room.roomId, {
+        linkifyOpts,
+        useAuthentication,
+        handleSpoilerClick: spoilerClickHandler,
+        handleMentionClick: mentionClickHandler,
+      }),
+    [mx, room, linkifyOpts, spoilerClickHandler, mentionClickHandler, useAuthentication],
+  );
+
+  const { timelines, ready } = useThreadLinkedTimelines(mx, thread);
+  const pendingEvents = useThreadPendingEvents(room, thread.id, thread);
+
+  const [timeline, setTimeline] = useState<Timeline>(() =>
+    ready ? getInitialThreadTimeline(thread, timelines) : getEmptyTimeline(),
+  );
+  const eventsLength = getTimelinesEventsCount(timeline.linkedTimelines);
+
+  const canPaginateBack =
+    typeof timeline.linkedTimelines[0]?.getPaginationToken(Direction.Backward) === 'string';
+  const rangeAtStart = timeline.range.start === 0;
+
+  const scrollRef = useRef<HTMLDivElement>(null);
+  const atBottomAnchorRef = useRef<HTMLElement>(null);
+  const [atBottom, setAtBottom] = useState(true);
+  const atBottomRef = useRef(atBottom);
+  atBottomRef.current = atBottom;
+  const scrollToBottomRef = useRef({ count: 0, smooth: true });
+
+  const handleTimelinePagination = useThreadTimelinePagination(
+    mx,
+    timeline,
+    setTimeline,
+    THREAD_PAGE_LIMIT,
+  );
+
+  const getScrollElement = useCallback(() => scrollRef.current, []);
+
+  const { getItems, scrollToItem, observeBackAnchor } = useVirtualPaginator({
+    count: eventsLength,
+    limit: PAGINATION_LIMIT,
+    range: timeline.range,
+    onRangeChange: useCallback((r) => setTimeline((cs) => ({ ...cs, range: r })), []),
+    getScrollElement,
+    getItemElement: useCallback(
+      (index: number) =>
+        (scrollRef.current?.querySelector(`[data-message-item="${index}"]`) as HTMLElement) ??
+        undefined,
+      [],
+    ),
+    onEnd: handleTimelinePagination,
+  });
+
+  // Seed local timeline once the thread has fetched its initial events.
+  const seededRef = useRef(false);
+  useEffect(() => {
+    if (!ready || seededRef.current) return;
+    seededRef.current = true;
+    setTimeline(getInitialThreadTimeline(thread, timelines));
+    scrollToBottomRef.current.count += 1;
+    scrollToBottomRef.current.smooth = false;
+    if (room.hasEncryptionStateEvent()) {
+      to(decryptAllTimelineEvent(mx, thread.liveTimeline)).then(() => {
+        if (alive()) setTimeline((ct) => ({ ...ct }));
+      });
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps -- seed once when ready flips
+  }, [ready, thread]);
+
+  // Re-render / stick-to-bottom on live thread activity.
+  useEffect(() => {
+    const handleTimeline: EventTimelineSetHandlerMap[RoomEvent.Timeline] = (
+      mEvent,
+      eventRoom,
+      toStartOfTimeline,
+      removed,
+      data,
+    ) => {
+      if (!data?.liveEvent) return;
+      if (atBottomRef.current) {
+        scrollToBottomRef.current.count += 1;
+        scrollToBottomRef.current.smooth = true;
+        setTimeline((ct) => ({
+          ...ct,
+          range: {
+            start: ct.range.start + 1,
+            end: ct.range.end + 1,
+          },
+        }));
+        return;
+      }
+      setTimeline((ct) => ({ ...ct }));
+    };
+    const handleUpdate = () => setTimeline((ct) => ({ ...ct }));
+    // A gappy sync / updateThreadMetadata resets the thread's live timeline —
+    // the stored linkedTimelines would then point at a detached timeline, so
+    // reseed the window from the fresh liveTimeline.
+    const handleReset = () => {
+      setTimeline(getInitialThreadTimeline(thread, getLinkedTimelines(thread.liveTimeline)));
+      scrollToBottomRef.current.count += 1;
+      scrollToBottomRef.current.smooth = false;
+    };
+
+    thread.on(RoomEvent.Timeline, handleTimeline);
+    thread.on(ThreadEvent.Update, handleUpdate);
+    thread.on(RoomEvent.TimelineReset, handleReset);
+    return () => {
+      thread.removeListener(RoomEvent.Timeline, handleTimeline);
+      thread.removeListener(ThreadEvent.Update, handleUpdate);
+      thread.removeListener(RoomEvent.TimelineReset, handleReset);
+    };
+  }, [thread]);
+
+  // atBottom detection
+  useIntersectionObserver(
+    useCallback((entries) => {
+      const target = atBottomAnchorRef.current;
+      if (!target) return;
+      const entry = getIntersectionObserverEntry(target, entries);
+      if (entry) setAtBottom(entry.isIntersecting);
+    }, []),
+    useCallback(
+      () => ({
+        root: getScrollElement(),
+        rootMargin: '100px',
+      }),
+      [getScrollElement],
+    ),
+    useCallback(() => atBottomAnchorRef.current, []),
+  );
+
+  // Initial scroll to bottom on mount.
+  useLayoutEffect(() => {
+    const scrollEl = scrollRef.current;
+    if (scrollEl) scrollToBottom(scrollEl);
+  }, []);
+
+  // Scroll to bottom when requested.
+  const scrollToBottomCount = scrollToBottomRef.current.count;
+  useLayoutEffect(() => {
+    if (scrollToBottomCount > 0) {
+      const scrollEl = scrollRef.current;
+      if (scrollEl)
+        scrollToBottom(scrollEl, scrollToBottomRef.current.smooth ? 'smooth' : 'instant');
+    }
+  }, [scrollToBottomCount]);
+
+  // Scroll in-place editor into view.
+  useEffect(() => {
+    if (editId) {
+      const editMsgElement =
+        (scrollRef.current?.querySelector(`[data-message-id="${editId}"]`) as HTMLElement) ??
+        undefined;
+      editMsgElement?.scrollIntoView({ block: 'center', behavior: 'smooth' });
+    }
+  }, [editId]);
+
+  const handleUserClick: MouseEventHandler<HTMLButtonElement> = useCallback(
+    (evt) => {
+      evt.preventDefault();
+      evt.stopPropagation();
+      const userId = evt.currentTarget.getAttribute('data-user-id');
+      if (!userId) return;
+      openUserRoomProfile(
+        room.roomId,
+        space?.roomId,
+        userId,
+        evt.currentTarget.getBoundingClientRect(),
+      );
+    },
+    [room, space, openUserRoomProfile],
+  );
+
+  const handleUsernameClick: MouseEventHandler<HTMLButtonElement> = useCallback(
+    (evt) => {
+      evt.preventDefault();
+      const userId = evt.currentTarget.getAttribute('data-user-id');
+      if (!userId) return;
+      const name = getMemberDisplayName(room, userId) ?? getMxIdLocalPart(userId) ?? userId;
+      editor.insertNode(
+        createMentionElement(
+          userId,
+          name.startsWith('@') ? name : `@${name}`,
+          userId === mx.getUserId(),
+        ),
+      );
+      ReactEditor.focus(editor);
+      moveCursor(editor);
+    },
+    [mx, room, editor],
+  );
+
+  const handleReplyClick: MouseEventHandler<HTMLButtonElement> = useCallback(
+    (evt) => {
+      const replyId = evt.currentTarget.getAttribute('data-event-id');
+      if (!replyId) return;
+      const replyEvt = thread.findEventById(replyId) ?? room.findEventById(replyId);
+      if (!replyEvt) return;
+      const editedReply = getEditedEvent(replyId, replyEvt, thread.getUnfilteredTimelineSet());
+      const content = editedReply?.getContent()['m.new_content'] ?? replyEvt.getContent();
+      const { body, formatted_body: formattedBody } = content;
+      const senderId = replyEvt.getSender();
+      if (senderId && typeof body === 'string') {
+        setReplyDraft({
+          userId: senderId,
+          eventId: replyId,
+          body,
+          formattedBody,
+          relation: { rel_type: RelationType.Thread, event_id: thread.id },
+        });
+        setTimeout(() => ReactEditor.focus(editor), 100);
+      }
+    },
+    [room, thread, setReplyDraft, editor],
+  );
+
+  const handleReactionToggle = useCallback(
+    (targetEventId: string, key: string, shortcode?: string) => {
+      const timelineSet = thread.getUnfilteredTimelineSet();
+      const relations = getEventReactions(timelineSet, targetEventId);
+      const allReactions = relations?.getSortedAnnotationsByKey() ?? [];
+      const [, reactionsSet] = allReactions.find(([k]) => k === key) ?? [];
+      const reactions = reactionsSet ? Array.from(reactionsSet) : [];
+      const myReaction = reactions.find(factoryEventSentBy(mx.getUserId()!));
+
+      if (myReaction && !!myReaction.isRelation()) {
+        mx.redactEvent(room.roomId, myReaction.getId()!);
+        return;
+      }
+      const rShortcode =
+        shortcode ||
+        (reactions.find(eventWithShortcode)?.getContent().shortcode as string | undefined);
+      mx.sendEvent(
+        room.roomId,
+        thread.id,
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        MessageEvent.Reaction as any,
+        getReactionContent(targetEventId, key, rShortcode),
+      );
+    },
+    [mx, room, thread],
+  );
+
+  const handleEdit = useCallback(
+    (editEvtId?: string) => {
+      if (editEvtId) {
+        setEditId(editEvtId);
+        return;
+      }
+      setEditId(undefined);
+      ReactEditor.focus(editor);
+    },
+    [editor],
+  );
+
+  const handleOpenReply: MouseEventHandler = useCallback(
+    (evt) => {
+      const targetId = evt.currentTarget.getAttribute('data-event-id');
+      if (!targetId) return;
+      // best-effort: scroll to referenced event if it is inside the loaded thread window
+      let absIndex = -1;
+      let acc = 0;
+      timeline.linkedTimelines.some((tl) => {
+        const idx = tl.getEvents().findIndex((e) => e.getId() === targetId);
+        if (idx !== -1) {
+          absIndex = acc + idx;
+          return true;
+        }
+        acc += tl.getEvents().length;
+        return false;
+      });
+      if (absIndex >= 0) {
+        scrollToItem(absIndex, {
+          behavior: 'smooth',
+          align: 'center',
+          stopInView: true,
+        });
+      }
+    },
+    [timeline.linkedTimelines, scrollToItem],
+  );
+
+  const renderMessageContent = useCallback(
+    (mEvent: MatrixEvent, mEventId: string, timelineSet: EventTimelineSet): ReactNode => {
+      // Evaluated lazily so EncryptedContent can re-run it (re-reading getType())
+      // after MatrixEventEvent.Decrypted fires — decryption re-emits NEITHER
+      // RoomEvent.Timeline nor ThreadEvent.Update, so without this wrapper a
+      // live-arriving encrypted reply would show "Unable to decrypt" forever.
+      const renderByType = (): ReactNode => {
+        if (mEvent.isRedacted()) {
+          return <RedactedContent reason={mEvent.getUnsigned().redacted_because?.content.reason} />;
+        }
+        const type = mEvent.getType();
+        if (type === MessageEvent.Sticker) {
+          return (
+            <MSticker
+              content={mEvent.getContent()}
+              renderImageContent={(props) => (
+                <ImageContent
+                  {...props}
+                  autoPlay={mediaAutoLoad}
+                  renderImage={(p) => <Image {...p} loading="lazy" />}
+                  renderViewer={(p) => <ImageViewer {...p} />}
+                />
+              )}
+            />
+          );
+        }
+        if (type === MessageEvent.RoomMessageEncrypted) {
+          return (
+            <Text>
+              <MessageNotDecryptedContent />
+            </Text>
+          );
+        }
+        if (type !== MessageEvent.RoomMessage) {
+          return (
+            <Text>
+              <MessageUnsupportedContent />
+            </Text>
+          );
+        }
+        const editedEvent = getEditedEvent(mEventId, mEvent, timelineSet);
+        const getContent = (() =>
+          editedEvent?.getContent()['m.new_content'] ?? mEvent.getContent()) as GetContentCallback;
+        const senderId = mEvent.getSender() ?? '';
+        const senderDisplayName =
+          getMemberDisplayName(room, senderId) ?? getMxIdLocalPart(senderId) ?? senderId;
+        return (
+          <RenderMessageContent
+            displayName={senderDisplayName}
+            msgType={mEvent.getContent().msgtype ?? ''}
+            ts={mEvent.getTs()}
+            edited={!!editedEvent}
+            onEditHistoryClick={editedEvent ? () => setEditHistoryEvent(mEvent) : undefined}
+            getContent={getContent}
+            mediaAutoLoad={mediaAutoLoad}
+            urlPreview={showUrlPreview}
+            htmlReactParserOptions={htmlReactParserOptions}
+            linkifyOpts={linkifyOpts}
+            outlineAttachment={messageLayout === MessageLayout.Bubble}
+            eventId={mEventId}
+          />
+        );
+      };
+
+      if (mEvent.getType() === MessageEvent.RoomMessageEncrypted) {
+        return <EncryptedContent mEvent={mEvent}>{renderByType}</EncryptedContent>;
+      }
+      return renderByType();
+    },
+    [room, mediaAutoLoad, showUrlPreview, htmlReactParserOptions, linkifyOpts, messageLayout],
+  );
+
+  const renderMessage = useCallback(
+    (
+      mEvent: MatrixEvent,
+      opts: { item?: number; collapse: boolean; highlight: boolean; editable: boolean },
+    ): ReactNode => {
+      const mEventId = mEvent.getId();
+      if (!mEventId) return null;
+      const timelineSet = thread.getUnfilteredTimelineSet();
+      const reactionRelations = getEventReactions(timelineSet, mEventId);
+      const reactions = reactionRelations?.getSortedAnnotationsByKey();
+      const hasReactions = !!reactions && reactions.length > 0;
+      const { replyEventId, threadRootId } = mEvent;
+
+      return (
+        <Message
+          key={mEventId}
+          data-message-item={opts.item}
+          data-message-id={mEventId}
+          room={room}
+          mEvent={mEvent}
+          messageSpacing={messageSpacing}
+          messageLayout={messageLayout}
+          collapse={opts.collapse}
+          highlight={opts.highlight}
+          edit={opts.editable && editId === mEventId}
+          canDelete={canRedact || (canDeleteOwn && mEvent.getSender() === mx.getUserId())}
+          canSendReaction={canSendReaction}
+          canPinEvent={canPinEvent}
+          imagePackRooms={imagePackRooms}
+          relations={hasReactions ? reactionRelations : undefined}
+          onUserClick={handleUserClick}
+          onUsernameClick={handleUsernameClick}
+          onReplyClick={handleReplyClick}
+          onReactionToggle={handleReactionToggle}
+          onEditId={opts.editable ? handleEdit : undefined}
+          reply={
+            replyEventId && (
+              <Reply
+                room={room}
+                timelineSet={timelineSet}
+                replyEventId={replyEventId}
+                threadRootId={threadRootId}
+                onClick={handleOpenReply}
+                getMemberPowerTag={getMemberPowerTag}
+                accessibleTagColors={accessiblePowerTagColors}
+                legacyUsernameColor={legacyUsernameColor || direct}
+              />
+            )
+          }
+          reactions={
+            reactionRelations && (
+              <Reactions
+                style={{ marginTop: config.space.S200 }}
+                room={room}
+                relations={reactionRelations}
+                mEventId={mEventId}
+                canSendReaction={canSendReaction}
+                onReactionToggle={handleReactionToggle}
+              />
+            )
+          }
+          hideReadReceipts={hideActivity}
+          showDeveloperTools={showDeveloperTools}
+          memberPowerTag={getMemberPowerTag(mEvent.getSender() ?? '')}
+          accessibleTagColors={accessiblePowerTagColors}
+          legacyUsernameColor={legacyUsernameColor || direct}
+          hour24Clock={hour24Clock}
+          dateFormatString={dateFormatString}
+          lotusTerminal={!!lotusTerminal}
+        >
+          {renderMessageContent(mEvent, mEventId, timelineSet)}
+        </Message>
+      );
+    },
+    [
+      thread,
+      room,
+      messageSpacing,
+      messageLayout,
+      editId,
+      canRedact,
+      canDeleteOwn,
+      canSendReaction,
+      canPinEvent,
+      imagePackRooms,
+      handleUserClick,
+      handleUsernameClick,
+      handleReplyClick,
+      handleReactionToggle,
+      handleEdit,
+      handleOpenReply,
+      getMemberPowerTag,
+      accessiblePowerTagColors,
+      legacyUsernameColor,
+      direct,
+      hideActivity,
+      showDeveloperTools,
+      hour24Clock,
+      dateFormatString,
+      lotusTerminal,
+      mx,
+      renderMessageContent,
+    ],
+  );
+
+  let prevEvent: MatrixEvent | undefined;
+  let isPrevRendered = false;
+  let dayDivider = false;
+  const eventRenderer = (item: number) => {
+    const [eventTimeline, baseIndex] = getTimelineAndBaseIndex(timeline.linkedTimelines, item);
+    if (!eventTimeline) return null;
+    const mEvent = getTimelineEvent(eventTimeline, getTimelineRelativeIndex(item, baseIndex));
+    const mEventId = mEvent?.getId();
+    if (!mEvent || !mEventId) return null;
+
+    // Skip annotations, edits, and any state/membership events (they can't be threaded).
+    if (reactionOrEditEvent(mEvent) || typeof mEvent.getStateKey() === 'string') {
+      prevEvent = mEvent;
+      return null;
+    }
+    const eventSender = mEvent.getSender();
+    if (eventSender && ignoredUsersSet.has(eventSender)) {
+      prevEvent = mEvent;
+      return null;
+    }
+
+    const isRoot = mEventId === thread.id;
+
+    if (!dayDivider) {
+      dayDivider = prevEvent ? !inSameDay(prevEvent.getTs(), mEvent.getTs()) : false;
+    }
+
+    const collapsed =
+      !isRoot &&
+      !perMessageProfiles &&
+      isPrevRendered &&
+      !dayDivider &&
+      prevEvent !== undefined &&
+      prevEvent.getId() !== thread.id &&
+      prevEvent.getSender() === eventSender &&
+      prevEvent.getType() === mEvent.getType() &&
+      minuteDifference(prevEvent.getTs(), mEvent.getTs()) < 5;
+
+    const eventJSX = renderMessage(mEvent, {
+      item,
+      collapse: collapsed,
+      highlight: false,
+      editable: true,
+    });
+
+    const dayDividerJSX =
+      dayDivider && eventJSX && !isRoot ? (
+        <MessageBase space={messageSpacing}>
+          <Box gap="100" justifyContent="Center" alignItems="Center">
+            <Line style={{ flexGrow: 1 }} variant="Surface" size="300" />
+            <Badge as="span" size="500" variant="Secondary" fill="None" radii="300">
+              <Text size="L400">
+                {(() => {
+                  if (today(mEvent.getTs())) return 'Today';
+                  if (yesterday(mEvent.getTs())) return 'Yesterday';
+                  return timeDayMonthYear(mEvent.getTs());
+                })()}
+              </Text>
+            </Badge>
+            <Line style={{ flexGrow: 1 }} variant="Surface" size="300" />
+          </Box>
+        </MessageBase>
+      ) : null;
+
+    prevEvent = mEvent;
+    isPrevRendered = !!eventJSX;
+    if (dayDividerJSX) dayDivider = false;
+
+    // Root gets an emphasized container + a "N replies" divider under it.
+    if (isRoot && eventJSX) {
+      const replyCount = thread.length;
+      return (
+        <React.Fragment key={mEventId}>
+          <div className={css.RootMessage}>{eventJSX}</div>
+          {replyCount > 0 && (
+            <Box
+              className={css.RepliesDivider}
+              gap="100"
+              justifyContent="Center"
+              alignItems="Center"
+            >
+              <Line style={{ flexGrow: 1 }} variant="Surface" size="300" />
+              <Text size="L400" priority="300">
+                {replyCount === 1 ? '1 reply' : `${replyCount} replies`}
+              </Text>
+              <Line style={{ flexGrow: 1 }} variant="Surface" size="300" />
+            </Box>
+          )}
+        </React.Fragment>
+      );
+    }
+
+    if (eventJSX && dayDividerJSX) {
+      return (
+        <React.Fragment key={mEventId}>
+          {dayDividerJSX}
+          {eventJSX}
+        </React.Fragment>
+      );
+    }
+
+    return eventJSX;
+  };
+
+  const items = getItems();
+  const showEmptyReplies = ready && thread.length === 0;
+
+  const renderPendingEvent = (mEvent: MatrixEvent) => {
+    const failed =
+      mEvent.status === EventStatus.NOT_SENT || mEvent.status === EventStatus.CANCELLED;
+    return (
+      <div
+        key={mEvent.getId() ?? mEvent.getTxnId()}
+        className={classNames(failed ? css.PendingFailed : css.PendingMessage)}
+      >
+        {renderMessage(mEvent, { collapse: false, highlight: false, editable: false })}
+        {failed && (
+          <Box style={{ padding: `0 ${config.space.S400}` }}>
+            <Text size="T200" style={{ color: color.Critical.Main }}>
+              Failed to send
+            </Text>
+          </Box>
+        )}
+      </div>
+    );
+  };
+
+  if (!ready) {
+    return (
+      <Box
+        className={css.ThreadCentered}
+        grow="Yes"
+        direction="Column"
+        justifyContent="Center"
+        alignItems="Center"
+      >
+        <Spinner variant="Secondary" size="600" />
+      </Box>
+    );
+  }
+
+  return (
+    <Box className={css.ThreadTimeline} grow="Yes">
+      <Scroll ref={scrollRef} visibility="Hover">
+        <Box
+          className={css.ThreadTimelineContent}
+          direction="Column"
+          justifyContent="End"
+          role="log"
+          aria-label="Thread timeline"
+          aria-live="polite"
+        >
+          {(canPaginateBack || !rangeAtStart) && (
+            <>
+              <MessageBase>
+                <DefaultPlaceholder />
+              </MessageBase>
+              <MessageBase ref={observeBackAnchor}>
+                <DefaultPlaceholder />
+              </MessageBase>
+            </>
+          )}
+
+          {items.map(eventRenderer)}
+
+          {showEmptyReplies && (
+            <Box className={css.NoReplies} justifyContent="Center">
+              <Text size="T300" priority="300">
+                No replies yet — say something
+              </Text>
+            </Box>
+          )}
+
+          {pendingEvents.map(renderPendingEvent)}
+
+          <span ref={atBottomAnchorRef} />
+        </Box>
+      </Scroll>
+      {editHistoryEvent && (
+        <EditHistoryModal
+          room={room}
+          mEvent={editHistoryEvent}
+          onClose={() => setEditHistoryEvent(undefined)}
+        />
+      )}
+    </Box>
+  );
+}

src/app/features/room/thread/index.ts

@@ -0,0 +1,2 @@
+export * from './ThreadPanel';
+export * from './ThreadSummary';

src/app/features/room/thread/threadSummary.test.ts

@@ -0,0 +1,133 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { EventStatus, MatrixEvent, RelationType } from 'matrix-js-sdk';
+import { getThreadSummary, isPendingThreadReply } from './threadSummary';
+
+// getThreadSummary reads either the live Thread (preferred) or the
+// server-aggregated `m.thread` bundle. We stub only the members it touches and
+// cast through `unknown` to MatrixEvent, mirroring the light mocking used in
+// the state tests.
+
+type ThreadStub = { length: number; lastReplyTs?: number };
+type BundleStub = { count: number; latestTs?: number };
+
+const makeRootEvent = (opts: { thread?: ThreadStub; bundle?: BundleStub }): MatrixEvent => {
+  const thread = opts.thread
+    ? {
+        length: opts.thread.length,
+        lastReply: () =>
+          opts.thread?.lastReplyTs === undefined
+            ? null
+            : ({ getTs: () => opts.thread?.lastReplyTs } as unknown as MatrixEvent),
+      }
+    : undefined;
+
+  return {
+    getThread: () => thread,
+    getServerAggregatedRelation: (relType: string) => {
+      if (relType !== RelationType.Thread || !opts.bundle) return undefined;
+      return {
+        count: opts.bundle.count,
+        latest_event:
+          opts.bundle.latestTs === undefined
+            ? undefined
+            : { origin_server_ts: opts.bundle.latestTs },
+      };
+    },
+  } as unknown as MatrixEvent;
+};
+
+// ---------------------------------------------------------------------------
+// getThreadSummary
+// ---------------------------------------------------------------------------
+
+test('prefers the live thread: count from length, latestTs from lastReply', () => {
+  const rootEvent = makeRootEvent({
+    thread: { length: 3, lastReplyTs: 1700 },
+    bundle: { count: 99, latestTs: 1 },
+  });
+  assert.deepEqual(getThreadSummary(rootEvent), { count: 3, latestTs: 1700 });
+});
+
+test('live thread with no replies yields undefined latestTs', () => {
+  const rootEvent = makeRootEvent({ thread: { length: 0 } });
+  assert.deepEqual(getThreadSummary(rootEvent), { count: 0, latestTs: undefined });
+});
+
+test('falls back to the server bundle when no live thread', () => {
+  const rootEvent = makeRootEvent({ bundle: { count: 5, latestTs: 1234 } });
+  assert.deepEqual(getThreadSummary(rootEvent), { count: 5, latestTs: 1234 });
+});
+
+test('bundle without latest_event yields undefined latestTs', () => {
+  const rootEvent = makeRootEvent({ bundle: { count: 2 } });
+  assert.deepEqual(getThreadSummary(rootEvent), { count: 2, latestTs: undefined });
+});
+
+test('returns undefined when there is neither a thread nor a bundle', () => {
+  const rootEvent = makeRootEvent({});
+  assert.equal(getThreadSummary(rootEvent), undefined);
+});
+
+// ---------------------------------------------------------------------------
+// isPendingThreadReply
+// ---------------------------------------------------------------------------
+
+const ROOT = '$root:server';
+
+const makeReply = (opts: {
+  status: EventStatus | null;
+  threadRootId?: string;
+  relation?: { rel_type?: string; event_id?: string } | null;
+}): MatrixEvent =>
+  ({
+    status: opts.status,
+    threadRootId: opts.threadRootId,
+    getRelation: () => opts.relation ?? null,
+  }) as unknown as MatrixEvent;
+
+test('SENDING with matching threadRootId is pending', () => {
+  const event = makeReply({ status: EventStatus.SENDING, threadRootId: ROOT });
+  assert.equal(isPendingThreadReply(event, ROOT), true);
+});
+
+test('NOT_SENT with matching threadRootId is pending', () => {
+  const event = makeReply({ status: EventStatus.NOT_SENT, threadRootId: ROOT });
+  assert.equal(isPendingThreadReply(event, ROOT), true);
+});
+
+test('SENDING resolved via the m.thread relation content is pending', () => {
+  const event = makeReply({
+    status: EventStatus.SENDING,
+    relation: { rel_type: RelationType.Thread, event_id: ROOT },
+  });
+  assert.equal(isPendingThreadReply(event, ROOT), true);
+});
+
+test('SENT (confirmed) event is not pending', () => {
+  const event = makeReply({ status: EventStatus.SENT, threadRootId: ROOT });
+  assert.equal(isPendingThreadReply(event, ROOT), false);
+});
+
+test('null status is not pending', () => {
+  const event = makeReply({ status: null, threadRootId: ROOT });
+  assert.equal(isPendingThreadReply(event, ROOT), false);
+});
+
+test('SENDING but for a different thread is not pending', () => {
+  const event = makeReply({ status: EventStatus.SENDING, threadRootId: '$other:server' });
+  assert.equal(isPendingThreadReply(event, ROOT), false);
+});
+
+test('SENDING with a non-thread relation is not pending', () => {
+  const event = makeReply({
+    status: EventStatus.SENDING,
+    relation: { rel_type: RelationType.Reference, event_id: ROOT },
+  });
+  assert.equal(isPendingThreadReply(event, ROOT), false);
+});
+
+test('SENDING with no relation and no threadRootId is not pending', () => {
+  const event = makeReply({ status: EventStatus.SENDING });
+  assert.equal(isPendingThreadReply(event, ROOT), false);
+});

src/app/features/room/thread/threadSummary.ts

@@ -0,0 +1,55 @@
+import { EventStatus, IThreadBundledRelationship, MatrixEvent, RelationType } from 'matrix-js-sdk';
+
+export type ThreadSummaryData = {
+  count: number;
+  latestTs: number | undefined;
+};
+
+/**
+ * Summary data for a thread root's "N replies" chip.
+ *
+ * Prefers the live {@link Thread} object when it exists (it reflects local
+ * echo + pagination), otherwise falls back to the server-aggregated bundle
+ * (`unsigned['m.relations']['m.thread']`) so the chip renders before any
+ * Thread object has been created. Returns `undefined` when the root has no
+ * thread at all.
+ */
+export const getThreadSummary = (rootEvent: MatrixEvent): ThreadSummaryData | undefined => {
+  const thread = rootEvent.getThread();
+  if (thread) {
+    const lastReply = thread.lastReply();
+    return {
+      count: thread.length,
+      latestTs: lastReply?.getTs(),
+    };
+  }
+
+  const bundle = rootEvent.getServerAggregatedRelation<IThreadBundledRelationship>(
+    RelationType.Thread,
+  );
+  if (bundle) {
+    return {
+      count: bundle.count,
+      latestTs: bundle.latest_event?.origin_server_ts,
+    };
+  }
+
+  return undefined;
+};
+
+/**
+ * True when `event` is a still-in-flight (local echo) reply belonging to the
+ * given thread root. Used to render the pending strip, since pending thread
+ * sends never enter the thread's timelineSet.
+ */
+export const isPendingThreadReply = (event: MatrixEvent, threadRootId: string): boolean => {
+  const { status } = event;
+  if (status !== EventStatus.SENDING && status !== EventStatus.NOT_SENT) return false;
+
+  // Prefer the SDK's resolved thread root id; fall back to the raw relation
+  // content for events the SDK hasn't associated with a thread yet.
+  if (event.threadRootId === threadRootId) return true;
+
+  const relation = event.getRelation();
+  return relation?.rel_type === RelationType.Thread && relation.event_id === threadRootId;
+};

src/app/features/room/thread/useThread.ts

@@ -0,0 +1,177 @@
+import { useCallback, useEffect, useState } from 'react';
+import {
+  EventStatus,
+  EventTimeline,
+  MatrixClient,
+  MatrixEvent,
+  ReceiptType,
+  Room,
+  RoomEvent,
+  RoomEventHandlerMap,
+  Thread,
+  ThreadEvent,
+} from 'matrix-js-sdk';
+import { getLinkedTimelines } from '../RoomTimeline';
+import { isPendingThreadReply } from './threadSummary';
+
+/**
+ * Resolve (or bootstrap) the live {@link Thread} for a root event.
+ *
+ * Uses the existing thread when present, otherwise creates one via
+ * `room.createThread` — the SDK then auto-fetches the thread's events via
+ * `/relations` and inserts the root at the top. If the root event isn't loaded
+ * locally the Thread handles the root fetch itself, so passing `undefined` is
+ * safe. Re-resolves when a matching thread later appears/updates on the room.
+ */
+export const useThreadInstance = (room: Room, threadRootId: string): Thread | undefined => {
+  const getInstance = useCallback((): Thread | undefined => {
+    const existing = room.getThread(threadRootId);
+    if (existing) return existing;
+    const rootEvent = room.findEventById(threadRootId);
+    return room.createThread(threadRootId, rootEvent, [], false) ?? undefined;
+  }, [room, threadRootId]);
+
+  const [thread, setThread] = useState<Thread | undefined>(getInstance);
+
+  useEffect(() => {
+    setThread(getInstance());
+
+    const handleThread: RoomEventHandlerMap[ThreadEvent.New] = (newThread) => {
+      if (newThread.id === threadRootId) setThread(newThread);
+    };
+    const handleThreadUpdate: RoomEventHandlerMap[ThreadEvent.Update] = (updatedThread) => {
+      if (updatedThread.id === threadRootId) setThread(updatedThread);
+    };
+
+    room.on(ThreadEvent.New, handleThread);
+    room.on(ThreadEvent.Update, handleThreadUpdate);
+    return () => {
+      room.removeListener(ThreadEvent.New, handleThread);
+      room.removeListener(ThreadEvent.Update, handleThreadUpdate);
+    };
+  }, [room, threadRootId, getInstance]);
+
+  return thread;
+};
+
+/**
+ * Build the ordered list of linked {@link EventTimeline}s for a thread's live
+ * timeline and track readiness (`thread.initialEventsFetched`). Subscribes to
+ * the Thread's re-emitted timeline events so callers repaginate/re-render as
+ * the thread fills in.
+ */
+export const useThreadLinkedTimelines = (
+  mx: MatrixClient,
+  thread: Thread,
+): { timelines: EventTimeline[]; ready: boolean; refresh: () => void } => {
+  const [timelines, setTimelines] = useState<EventTimeline[]>(() =>
+    getLinkedTimelines(thread.liveTimeline),
+  );
+  const [ready, setReady] = useState<boolean>(() => thread.initialEventsFetched);
+
+  const refresh = useCallback(() => {
+    setTimelines(getLinkedTimelines(thread.liveTimeline));
+    setReady(thread.initialEventsFetched);
+  }, [thread]);
+
+  useEffect(() => {
+    refresh();
+
+    const handleTimeline = () => refresh();
+    // Thread re-emits RoomEvent.Timeline / RoomEvent.TimelineReset from its
+    // timelineSet, and fires ThreadEvent.Update as it (re)populates.
+    thread.on(RoomEvent.Timeline, handleTimeline);
+    thread.on(RoomEvent.TimelineReset, handleTimeline);
+    thread.on(ThreadEvent.Update, handleTimeline);
+    return () => {
+      thread.removeListener(RoomEvent.Timeline, handleTimeline);
+      thread.removeListener(RoomEvent.TimelineReset, handleTimeline);
+      thread.removeListener(ThreadEvent.Update, handleTimeline);
+    };
+  }, [thread, refresh]);
+
+  return { timelines, ready, refresh };
+};
+
+/**
+ * Track in-flight (local echo) replies for a thread.
+ *
+ * Pending thread sends never enter the thread's timelineSet (chronological
+ * pending ordering rejects them; `room.getPendingEvents()` THROWS in this
+ * mode). We instead watch `RoomEvent.LocalEchoUpdated` on the room and keep our
+ * own list of events that are pending replies to this thread and not yet in the
+ * thread timeline. When an event's remote echo arrives (status flips to SENT,
+ * or it lands in the thread) it drops out of the list.
+ */
+export const useThreadPendingEvents = (
+  room: Room,
+  threadRootId: string,
+  thread: Thread | undefined,
+): MatrixEvent[] => {
+  const [pending, setPending] = useState<MatrixEvent[]>([]);
+
+  useEffect(() => {
+    setPending([]);
+
+    const handleLocalEcho: RoomEventHandlerMap[RoomEvent.LocalEchoUpdated] = (event) => {
+      const eventId = event.getId();
+      setPending((prev) => {
+        // Drop any previous entry for this event (same instance across the
+        // temp-id -> real-id transition, or matched by id).
+        const without = prev.filter((e) => e !== event && e.getId() !== eventId);
+
+        const alreadyInThread =
+          eventId !== undefined && thread?.findEventById(eventId) !== undefined;
+        // Keep a tracked event through the SENT window too: the /send response
+        // flips status to SENT before /sync delivers the event into the thread
+        // timeline — dropping it there would make the message flash out of view.
+        // It falls out on the next LocalEchoUpdated once findEventById sees it.
+        const trackedAndAwaitingSync =
+          event.status === EventStatus.SENT &&
+          prev.some((e) => e === event || (eventId !== undefined && e.getId() === eventId));
+        const stillPending =
+          !alreadyInThread && (isPendingThreadReply(event, threadRootId) || trackedAndAwaitingSync);
+
+        if (stillPending) return [...without, event];
+        return without.length === prev.length ? prev : without;
+      });
+    };
+
+    room.on(RoomEvent.LocalEchoUpdated, handleLocalEcho);
+    return () => {
+      room.removeListener(RoomEvent.LocalEchoUpdated, handleLocalEcho);
+    };
+  }, [room, threadRootId, thread]);
+
+  return pending;
+};
+
+/**
+ * Send a threaded read receipt up to the latest confirmed event in the thread.
+ *
+ * The receipt is threaded by default (scoped to this thread), which clears the
+ * per-thread unread count. Mirrors the latest-valid-event scan in
+ * `utils/notifications.ts`.
+ */
+export const markThreadAsRead = async (
+  mx: MatrixClient,
+  thread: Thread,
+  privateReceipt: boolean,
+): Promise<void> => {
+  const events = thread.liveTimeline.getEvents();
+
+  let latestEvent: MatrixEvent | undefined;
+  for (let i = events.length - 1; i >= 0; i -= 1) {
+    const evt = events[i];
+    if (evt && !evt.isSending()) {
+      latestEvent = evt;
+      break;
+    }
+  }
+  if (!latestEvent) return;
+
+  await mx.sendReadReceipt(
+    latestEvent,
+    privateReceipt ? ReceiptType.ReadPrivate : ReceiptType.Read,
+  );
+};

src/app/features/settings/developer-tools/DevelopTools.tsx

@@ -13,6 +13,7 @@ import {
 } from '../../../components/AccountDataEditor';
 import { copyToClipboard } from '../../../utils/dom';
 import { AccountData } from './AccountData';
+import { CryptoDiagnostics } from '../developer/CryptoDiagnostics';
 
 type DeveloperToolsProps = {
   requestClose: () => void;
@@ -109,6 +110,7 @@ export function DeveloperTools({ requestClose }: DeveloperToolsProps) {
                     />
                   </SequenceCard>
                 )}
+                {developerTools && <CryptoDiagnostics />}
               </Box>
               {developerTools && (
                 <AccountData

src/app/features/settings/developer/CryptoDiagnostics.tsx

@@ -0,0 +1,71 @@
+import React, { useCallback } from 'react';
+import { Badge, Box, Button, Text } from 'folds';
+import { SequenceCard } from '../../../components/sequence-card';
+import { SequenceCardStyle } from '../styles.css';
+import { SettingTile } from '../../../components/setting-tile';
+import { useMatrixClient } from '../../../hooks/useMatrixClient';
+import { useForceUpdate } from '../../../hooks/useForceUpdate';
+import { useInterval } from '../../../hooks/useInterval';
+import { buildCryptoDiagReport, getCryptoDiagEntries } from '../../../utils/cryptoDiagLog';
+
+// Lotus E2EE investigation kit — Crypto Diagnostics settings card.
+// Mirrors the surrounding Developer Tools cards (see DevelopTools.tsx).
+
+const REFRESH_MS = 1000;
+
+export function CryptoDiagnostics() {
+  const mx = useMatrixClient();
+  // Re-render on a light interval so the live matched-entry count stays fresh
+  // while the settings pane is open.
+  const [, forceUpdate] = useForceUpdate();
+  useInterval(forceUpdate, REFRESH_MS);
+
+  const count = getCryptoDiagEntries().length;
+
+  const handleDownload = useCallback(() => {
+    const report = buildCryptoDiagReport(mx);
+    const blob = new Blob([report], { type: 'application/json' });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = `lotus-crypto-diag-${new Date().toISOString().replace(/[:.]/g, '-')}.json`;
+    a.click();
+    URL.revokeObjectURL(url);
+  }, [mx]);
+
+  return (
+    <Box direction="Column" gap="100">
+      <Text size="L400">Crypto Diagnostics</Text>
+      <SequenceCard
+        className={SequenceCardStyle}
+        variant="SurfaceVariant"
+        direction="Column"
+        gap="400"
+      >
+        <SettingTile
+          title="Crypto Diagnostics — captures E2EE error signatures this session"
+          description="Ring-buffers up to 200 matched console warnings/errors for the KE-1..KE-4 bug cluster. Local only — no network calls. The downloaded report includes the matched log lines as evidence."
+          after={
+            <Box alignItems="Center" gap="200" shrink="No">
+              <Badge variant={count > 0 ? 'Critical' : 'Secondary'} fill="Solid" radii="Pill">
+                <Text as="span" size="L400">
+                  {count}
+                </Text>
+              </Badge>
+              <Button
+                onClick={handleDownload}
+                variant="Secondary"
+                fill="Soft"
+                size="300"
+                radii="300"
+                outlined
+              >
+                <Text size="B300">Download report</Text>
+              </Button>
+            </Box>
+          }
+        />
+      </SequenceCard>
+    </Box>
+  );
+}

src/app/features/settings/general/General.tsx

@@ -5,6 +5,7 @@ import React, {
   MouseEventHandler,
   useCallback,
   useEffect,
+  useMemo,
   useRef,
   useState,
 } from 'react';
@@ -34,6 +35,19 @@ import {
 import { isKeyHotkey } from 'is-hotkey';
 import { HexColorPicker } from 'react-colorful';
 import FocusTrap from 'focus-trap-react';
+import {
+  draggable,
+  dropTargetForElements,
+  monitorForElements,
+} from '@atlaskit/pragmatic-drag-and-drop/element/adapter';
+import { combine } from '@atlaskit/pragmatic-drag-and-drop/combine';
+import { reorder } from '@atlaskit/pragmatic-drag-and-drop/reorder';
+import {
+  attachClosestEdge,
+  extractClosestEdge,
+  Edge,
+} from '@atlaskit/pragmatic-drag-and-drop-hitbox/closest-edge';
+import { useAtom } from 'jotai';
 import { HexColorPickerPopOut } from '../../../components/HexColorPickerPopOut';
 import { BgSwatch as BgSwatchStyle } from './BgSwatch.css';
 import { Page, PageContent, PageHeader } from '../../../components/page';
@@ -45,18 +59,29 @@ import {
 } from '../../../utils/lotusDenoiseUtils';
 import { useSetting } from '../../../state/hooks/settings';
 import {
+  CallAudioBitrate,
   ChatBackground,
+  ComposerToolbarButtonKey,
   ComposerToolbarSettings,
   DateFormat,
   DenoiseModelId,
   MessageLayout,
   MessageSpacing,
   NoiseSuppressionMode,
+  normalizeComposerToolbarOrder,
   RingtoneId,
+  ScreenshareBitrate,
+  ScreenshareFramerate,
   Settings,
   settingsAtom,
 } from '../../../state/settings';
+import {
+  AUDIO_BITRATE_OPTIONS,
+  SCREENSHARE_BITRATE_OPTIONS,
+  SCREENSHARE_FRAMERATE_OPTIONS,
+} from '../../../utils/callQuality';
 import { SeasonalPreview, SeasonTheme } from '../../../components/seasonal/SeasonalEffect';
+import { SEASON_DATE_RANGES } from '../../../components/seasonal/seasonSchedule';
 import { SettingTile } from '../../../components/setting-tile';
 import { KeySymbol } from '../../../utils/key-symbol';
 import { isMacOS } from '../../../utils/user-agent';
@@ -77,12 +102,33 @@ import { useMessageLayoutItems } from '../../../hooks/useMessageLayout';
 import { useMessageSpacingItems } from '../../../hooks/useMessageSpacing';
 import { SequenceCardStyle } from '../styles.css';
 import { useTauriUpdater } from '../../../hooks/useTauriUpdater';
+import { isTauri as isTauriEnv } from '../../../hooks/useTauri';
+import { customWindowChromeAtom } from '../../../state/customWindowChrome';
 import { useDateFormatItems } from '../../../hooks/useDateFormat';
 import { playCallJoinSound } from '../../../utils/callSounds';
 import { previewRingtone, RINGTONE_OPTIONS } from '../../../utils/ringtones';
 import { DenoiseTester } from './DenoiseTester';
 import { SettingsSelect } from '../../../components/settings-select/SettingsSelect';
 
+/**
+ * P5-47 — opt-in TDS window chrome toggle (desktop only). Renders nothing in the
+ * browser. Backed by the standalone `customWindowChromeAtom`; `useTauriWindowChrome`
+ * (mounted in App.tsx) applies `set_decorations` when this flips.
+ */
+function DesktopChromeSetting() {
+  const [customChrome, setCustomChrome] = useAtom(customWindowChromeAtom);
+  if (!isTauriEnv()) return null;
+  return (
+    <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+      <SettingTile
+        title="Custom Window Chrome (Beta)"
+        description="Replace the system title bar with a Lotus-styled one. Desktop only — toggles instantly."
+        after={<Switch variant="Primary" value={customChrome} onChange={setCustomChrome} />}
+      />
+    </SequenceCard>
+  );
+}
+
 type ThemeSelectorProps = {
   themeNames: Record<string, string>;
   themes: Theme[];
@@ -396,6 +442,8 @@ function Appearance() {
         />
       </SequenceCard>
 
+      <DesktopChromeSetting />
+
       <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
         <SettingTile
           title="Twitter Emoji"
@@ -438,7 +486,7 @@ function Appearance() {
       >
         <SettingTile
           title="Seasonal Theme"
-          description="Decorative overlays for holidays and events. Preview below — click to select."
+          description="Decorative overlays for holidays and events. “Auto” follows the calendar — each theme below shows the dates it turns on. Click to select."
         />
         <Box style={{ padding: `0 ${config.space.S400} ${config.space.S300}` }}>
           <SeasonalBgGrid
@@ -1016,6 +1064,165 @@ function DateAndTime() {
   );
 }
 
+const COMPOSER_TOOLBAR_LABELS: Record<ComposerToolbarButtonKey, string> = {
+  showFormat: 'Format',
+  showEmoji: 'Emoji',
+  showSticker: 'Sticker',
+  showGif: 'GIF',
+  showLocation: 'Location',
+  showPoll: 'Poll',
+  showVoice: 'Voice',
+  showSchedule: 'Schedule',
+};
+
+const COMPOSER_TOOLBAR_DRAG_TYPE = 'composer-toolbar-button';
+
+type ComposerToolbarButtonRowProps = {
+  buttonKey: ComposerToolbarButtonKey;
+  index: number;
+  active: boolean;
+  onToggle: (key: ComposerToolbarButtonKey) => void;
+};
+
+function ComposerToolbarButtonRow({
+  buttonKey,
+  index,
+  active,
+  onToggle,
+}: ComposerToolbarButtonRowProps) {
+  const rowRef = useRef<HTMLDivElement>(null);
+  const handleRef = useRef<HTMLButtonElement>(null);
+  const [dragging, setDragging] = useState(false);
+  const [closestEdge, setClosestEdge] = useState<Edge | null>(null);
+
+  useEffect(() => {
+    const element = rowRef.current;
+    const dragHandle = handleRef.current;
+    if (!element || !dragHandle) return undefined;
+
+    return combine(
+      draggable({
+        element,
+        dragHandle,
+        getInitialData: () => ({ type: COMPOSER_TOOLBAR_DRAG_TYPE, buttonKey, index }),
+        onDragStart: () => setDragging(true),
+        onDrop: () => setDragging(false),
+      }),
+      dropTargetForElements({
+        element,
+        canDrop: ({ source }) => source.data.type === COMPOSER_TOOLBAR_DRAG_TYPE,
+        getData: ({ input }) =>
+          attachClosestEdge(
+            { type: COMPOSER_TOOLBAR_DRAG_TYPE, buttonKey, index },
+            { element, input, allowedEdges: ['top', 'bottom'] },
+          ),
+        getIsSticky: () => true,
+        onDrag: ({ self, source }) => {
+          if (source.data.buttonKey === buttonKey) {
+            setClosestEdge(null);
+            return;
+          }
+          setClosestEdge(extractClosestEdge(self.data));
+        },
+        onDragLeave: () => setClosestEdge(null),
+        onDrop: () => setClosestEdge(null),
+      }),
+    );
+  }, [buttonKey, index]);
+
+  let boxShadow: string | undefined;
+  if (closestEdge === 'top') boxShadow = `inset 0 2px 0 0 ${color.Primary.Main}`;
+  else if (closestEdge === 'bottom') boxShadow = `inset 0 -2px 0 0 ${color.Primary.Main}`;
+
+  return (
+    <Box
+      ref={rowRef}
+      alignItems="Center"
+      gap="200"
+      style={{
+        padding: `${config.space.S200} ${config.space.S400}`,
+        opacity: dragging ? 0.5 : undefined,
+        boxShadow,
+      }}
+    >
+      <IconButton
+        ref={handleRef}
+        size="300"
+        radii="300"
+        variant="SurfaceVariant"
+        style={{ cursor: 'grab' }}
+        aria-label={`Reorder ${COMPOSER_TOOLBAR_LABELS[buttonKey]}`}
+      >
+        <Icon size="100" src={Icons.VerticalDots} />
+      </IconButton>
+      <Text style={{ flexGrow: 1 }} size="T300">
+        {COMPOSER_TOOLBAR_LABELS[buttonKey]}
+      </Text>
+      <Chip
+        variant={active ? 'Primary' : 'Secondary'}
+        outlined={active}
+        radii="Pill"
+        onClick={() => onToggle(buttonKey)}
+        aria-pressed={active}
+      >
+        <Text size="T200">{active ? 'Shown' : 'Hidden'}</Text>
+      </Chip>
+    </Box>
+  );
+}
+
+type ComposerToolbarReorderProps = {
+  order: ComposerToolbarButtonKey[];
+  buttons: ComposerToolbarSettings;
+  onReorder: (startIndex: number, finishIndex: number) => void;
+  onToggle: (key: ComposerToolbarButtonKey) => void;
+};
+
+function ComposerToolbarReorder({
+  order,
+  buttons,
+  onReorder,
+  onToggle,
+}: ComposerToolbarReorderProps) {
+  useEffect(
+    () =>
+      monitorForElements({
+        canMonitor: ({ source }) => source.data.type === COMPOSER_TOOLBAR_DRAG_TYPE,
+        onDrop: ({ location, source }) => {
+          const target = location.current.dropTargets[0];
+          if (!target) return;
+          const startIndex = source.data.index;
+          const indexOfTarget = target.data.index;
+          if (typeof startIndex !== 'number' || typeof indexOfTarget !== 'number') return;
+          const closestEdgeOfTarget = extractClosestEdge(target.data);
+
+          // Insert relative to the target row, then compensate for the source
+          // row being removed from its original position.
+          let finishIndex = closestEdgeOfTarget === 'bottom' ? indexOfTarget + 1 : indexOfTarget;
+          if (startIndex < finishIndex) finishIndex -= 1;
+
+          if (finishIndex === startIndex) return;
+          onReorder(startIndex, finishIndex);
+        },
+      }),
+    [onReorder],
+  );
+
+  return (
+    <Box direction="Column">
+      {order.map((key, index) => (
+        <ComposerToolbarButtonRow
+          key={key}
+          buttonKey={key}
+          index={index}
+          active={buttons[key]}
+          onToggle={onToggle}
+        />
+      ))}
+    </Box>
+  );
+}
+
 function Editor() {
   const [enterForNewline, setEnterForNewline] = useSetting(settingsAtom, 'enterForNewline');
   const [isMarkdown, setIsMarkdown] = useSetting(settingsAtom, 'isMarkdown');
@@ -1025,20 +1232,31 @@ function Editor() {
     'composerToolbarButtons',
   );
 
-  const toggleToolbarButton = (key: keyof ComposerToolbarSettings) => {
+  const composerToolbarOrder = useMemo(
-    setComposerToolbarButtons({ ...composerToolbarButtons, [key]: !composerToolbarButtons[key] });
+    () => normalizeComposerToolbarOrder(composerToolbarButtons?.order),
-  };
+    [composerToolbarButtons?.order],
+  );
 
-  const TOOLBAR_CHIPS: Array<{ key: keyof ComposerToolbarSettings; label: string }> = [
+  const toggleToolbarButton = useCallback(
-    { key: 'showFormat', label: 'Format' },
+    (key: ComposerToolbarButtonKey) => {
-    { key: 'showEmoji', label: 'Emoji' },
+      setComposerToolbarButtons((current) => ({ ...current, [key]: !current[key] }));
-    { key: 'showSticker', label: 'Sticker' },
+    },
-    { key: 'showGif', label: 'GIF' },
+    [setComposerToolbarButtons],
-    { key: 'showLocation', label: 'Location' },
+  );
-    { key: 'showPoll', label: 'Poll' },
+
-    { key: 'showVoice', label: 'Voice' },
+  const reorderToolbarButtons = useCallback(
-    { key: 'showSchedule', label: 'Schedule' },
+    (startIndex: number, finishIndex: number) => {
-  ];
+      setComposerToolbarButtons((current) => ({
+        ...current,
+        order: reorder({
+          list: normalizeComposerToolbarOrder(current.order),
+          startIndex,
+          finishIndex,
+        }),
+      }));
+    },
+    [setComposerToolbarButtons],
+  );
 
   return (
     <Box direction="Column" gap="100">
@@ -1073,28 +1291,15 @@ function Editor() {
       >
         <SettingTile
           title="Composer Toolbar"
-          description="Tap a button to show or hide it in the message composer."
+          description="Drag to reorder buttons, and tap a button to show or hide it in the message composer."
         />
-        <Box
+        <Box direction="Column" style={{ paddingBottom: config.space.S200 }}>
-          wrap="Wrap"
+          <ComposerToolbarReorder
-          gap="200"
+            order={composerToolbarOrder}
-          style={{ padding: `0 ${config.space.S400} ${config.space.S300}` }}
+            buttons={composerToolbarButtons}
-        >
+            onReorder={reorderToolbarButtons}
-          {TOOLBAR_CHIPS.map(({ key, label }) => {
+            onToggle={toggleToolbarButton}
-            const active = composerToolbarButtons?.[key] ?? true;
+          />
-            return (
-              <Chip
-                key={key}
-                variant={active ? 'Primary' : 'Secondary'}
-                outlined={active}
-                radii="Pill"
-                onClick={() => toggleToolbarButton(key)}
-                aria-pressed={active}
-              >
-                <Text size="T300">{label}</Text>
-              </Chip>
-            );
-          })}
         </Box>
       </SequenceCard>
     </Box>
@@ -1220,6 +1425,18 @@ function Calls() {
   const [ringtoneVolume, setRingtoneVolume] = useSetting(settingsAtom, 'ringtoneVolume');
   const [ringtoneId, setRingtoneId] = useSetting(settingsAtom, 'ringtoneId');
 
+  const [callAudioBitrate, setCallAudioBitrate] = useSetting(settingsAtom, 'callAudioBitrate');
+  const [screenshareBitrate, setScreenshareBitrate] = useSetting(
+    settingsAtom,
+    'screenshareBitrate',
+  );
+  const [screenshareFramerate, setScreenshareFramerate] = useSetting(
+    settingsAtom,
+    'screenshareFramerate',
+  );
+  const [soundboardEnabled, setSoundboardEnabled] = useSetting(settingsAtom, 'soundboardEnabled');
+  const [soundboardVolume, setSoundboardVolume] = useSetting(settingsAtom, 'soundboardVolume');
+
   const handleJoinLeaveSoundChange = (value: 'off' | 'chime' | 'soft' | 'retro') => {
     setCallJoinLeaveSound(value);
     if (value !== 'off') playCallJoinSound(value);
@@ -1615,6 +1832,80 @@ function Calls() {
           }
         />
       </SequenceCard>
+
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Microphone Bitrate"
+          description="Cap the audio bitrate your mic sends in calls. Lower saves bandwidth; higher is clearer. Auto lets Element Call decide."
+          after={
+            <SettingsSelect<CallAudioBitrate>
+              value={callAudioBitrate}
+              onChange={setCallAudioBitrate}
+              options={AUDIO_BITRATE_OPTIONS}
+            />
+          }
+        />
+      </SequenceCard>
+
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Screenshare Bitrate"
+          description="Cap the bitrate used when you share your screen. Lower is smoother on poor connections; higher is sharper."
+          after={
+            <SettingsSelect<ScreenshareBitrate>
+              value={screenshareBitrate}
+              onChange={setScreenshareBitrate}
+              options={SCREENSHARE_BITRATE_OPTIONS}
+            />
+          }
+        />
+      </SequenceCard>
+
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Screenshare Framerate"
+          description="Cap the frames-per-second of your screenshare. 60 fps suits motion/gaming; 15 fps suits slides and saves bandwidth."
+          after={
+            <SettingsSelect<ScreenshareFramerate>
+              value={screenshareFramerate}
+              onChange={setScreenshareFramerate}
+              options={SCREENSHARE_FRAMERATE_OPTIONS}
+            />
+          }
+        />
+      </SequenceCard>
+
+      <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
+        <SettingTile
+          title="Soundboard"
+          description="Show a soundboard button in the call bar. Upload short audio clips (like custom emojis) to play them into the call. Clips sync across your devices."
+          after={
+            <Switch variant="Primary" value={soundboardEnabled} onChange={setSoundboardEnabled} />
+          }
+        />
+        {soundboardEnabled && (
+          <SettingTile
+            title="Soundboard Volume"
+            after={
+              <Box alignItems="Center" gap="200" style={{ minWidth: toRem(180) }}>
+                <input
+                  type="range"
+                  min={0}
+                  max={100}
+                  step={5}
+                  value={soundboardVolume}
+                  onChange={(e) => setSoundboardVolume(parseInt(e.target.value, 10))}
+                  style={{ flexGrow: 1 }}
+                  aria-label="Soundboard volume"
+                />
+                <Text size="T200" style={{ minWidth: toRem(36), textAlign: 'right' }}>
+                  {soundboardVolume}%
+                </Text>
+              </Box>
+            }
+          />
+        )}
+      </SequenceCard>
     </Box>
   );
 }
@@ -1699,6 +1990,13 @@ function SeasonalBgGrid({
             <Text size="T200" style={selected ? { color: color.Primary.Main } : undefined}>
               {opt.label}
             </Text>
+            {(opt.value === 'auto' || !isSpecial) && (
+              <Text size="T200" style={{ opacity: 0.6, textAlign: 'center' }}>
+                {opt.value === 'auto'
+                  ? 'By calendar'
+                  : SEASON_DATE_RANGES[opt.value as SeasonTheme]}
+              </Text>
+            )}
           </Box>
         );
       })}

src/app/hooks/useCallQuality.ts

@@ -0,0 +1,41 @@
+import { useEffect } from 'react';
+import { useAtomValue } from 'jotai';
+import { CallEmbed } from '../plugins/call';
+import { settingsAtom } from '../state/settings';
+import { useStateEvent } from './useStateEvent';
+import { StateEvent } from '../../types/matrix/room';
+import { buildQualityPayload, RoomQualityContent } from '../utils/callQuality';
+
+/**
+ * [P5-31] Apply the user's call quality settings (clamped by any room-level
+ * cap) to the Element Call fork via the `io.lotus.set_quality` widget action.
+ *
+ * The fork stores the settings and re-applies them on every (re)publish and
+ * reconnect, so we only need to (re)send when the payload changes or the widget
+ * becomes ready — no need to poll the track lifecycle here.
+ */
+export function useCallQuality(embed: CallEmbed): void {
+  const { callAudioBitrate, screenshareBitrate, screenshareFramerate } = useAtomValue(settingsAtom);
+
+  const roomQualityEvent = useStateEvent(embed.room, StateEvent.LotusRoomQuality);
+  const roomCaps = roomQualityEvent?.getContent<RoomQualityContent>();
+
+  // Depend on the primitive cap values (not the event object) so re-renders
+  // don't resend needlessly.
+  const audioCap = roomCaps?.audio_max_kbps;
+  const ssCap = roomCaps?.screenshare_max_kbps;
+  const fpsCap = roomCaps?.screenshare_max_fps;
+
+  useEffect(() => {
+    const payload = buildQualityPayload(
+      { callAudioBitrate, screenshareBitrate, screenshareFramerate },
+      { audio_max_kbps: audioCap, screenshare_max_kbps: ssCap, screenshare_max_fps: fpsCap },
+    );
+    const send = (): void => embed.control.setQuality(payload);
+    // Send now (settings are sticky fork-side even if tracks aren't up yet) and
+    // again once the widget signals ready, in case the transport wasn't up.
+    send();
+    const off = embed.onReady(send);
+    return off;
+  }, [embed, callAudioBitrate, screenshareBitrate, screenshareFramerate, audioCap, ssCap, fpsCap]);
+}

src/app/hooks/useFileDrop.ts

@@ -1,11 +1,16 @@
 import { useCallback, DragEventHandler, RefObject, useState, useEffect, useRef } from 'react';
-import { getDataTransferFiles } from '../utils/dom';
+import { collectDroppedFiles } from '../utils/fileEntries';
 
 export const useFileDropHandler = (onDrop: (file: File[]) => void): DragEventHandler =>
   useCallback(
     (evt) => {
-      const files = getDataTransferFiles(evt.dataTransfer);
+      // `collectDroppedFiles` synchronously captures the entry list from the
-      if (files) onDrop(files);
+      // DataTransfer before traversing folders asynchronously.
+      collectDroppedFiles(evt.dataTransfer)
+        .then((files) => {
+          if (files) onDrop(files);
+        })
+        .catch(() => undefined);
     },
     [onDrop],
   );
@@ -24,8 +29,14 @@ export const useFileDropZone = (
       dragCounterRef.current = 0;
       setActive(false);
       if (!evt.dataTransfer) return;
-      const files = getDataTransferFiles(evt.dataTransfer);
+      // Capture entries synchronously (inside the event) then traverse any
-      if (files) onDrop(files);
+      // dropped folders asynchronously — the DataTransferItemList is emptied
+      // once this handler returns.
+      collectDroppedFiles(evt.dataTransfer)
+        .then((files) => {
+          if (files) onDrop(files);
+        })
+        .catch(() => undefined);
     };
 
     target?.addEventListener('drop', handleDrop);

src/app/hooks/useRoomsListener.ts

@@ -0,0 +1,66 @@
+import { useEffect, useRef } from 'react';
+import {
+  ClientEvent,
+  MatrixClient,
+  Room,
+  RoomEmittedEvents,
+  RoomEventHandlerMap,
+} from 'matrix-js-sdk';
+
+/**
+ * Attach `handler` for `event` on every joined/known room, including rooms
+ * created after mount (via `ClientEvent.Room`). All listeners are detached on
+ * unmount or when `mx`/`event` change.
+ *
+ * The handler is stored in a ref (mirroring `useTauriEvent`) so callers don't
+ * need to memoize it — changing the handler identity never re-attaches the
+ * per-room listeners.
+ *
+ * The emitting {@link Room} is PREPENDED as the first argument, before the
+ * event's own args: several room-level SDK events (e.g.
+ * `RoomEvent.UnreadNotifications`) don't include the room in their payload,
+ * which callers need for per-room updates. Prepending (not appending) is
+ * load-bearing — some SDK events emit with VARIABLE arity
+ * (UnreadNotifications fires with 0, 1, or 2 args), so a trailing extra arg
+ * would land in a different positional slot per emit.
+ */
+export function useRoomsListener<E extends RoomEmittedEvents>(
+  mx: MatrixClient,
+  event: E,
+  handler: (room: Room, ...args: Parameters<RoomEventHandlerMap[E]>) => void,
+): void {
+  const handlerRef = useRef(handler);
+  handlerRef.current = handler;
+
+  useEffect(() => {
+    // Track attached rooms (and their per-room trampolines) so re-emitted
+    // `ClientEvent.Room` (e.g. on membership changes) never double-subscribes,
+    // and cleanup can detach exactly what was attached.
+    const attached = new Map<string, (...args: unknown[]) => void>();
+
+    const attach = (room: Room) => {
+      if (attached.has(room.roomId)) return;
+      // Per-room trampoline: forwards to the current ref value with the
+      // emitting room PREPENDED (stable slot regardless of emit arity).
+      const roomHandler = (...args: unknown[]) =>
+        (handlerRef.current as (...a: unknown[]) => void)(room, ...args);
+      attached.set(room.roomId, roomHandler);
+      // `event`/`roomHandler` are correlated through E but TS can't prove it
+      // for the open generic, so we assert at the boundary.
+      room.on(event, roomHandler as any);
+    };
+
+    mx.getRooms().forEach(attach);
+
+    const handleRoom = (room: Room) => attach(room);
+    mx.on(ClientEvent.Room, handleRoom);
+
+    return () => {
+      mx.removeListener(ClientEvent.Room, handleRoom);
+      attached.forEach((roomHandler, roomId) => {
+        mx.getRoom(roomId)?.removeListener(event, roomHandler as any);
+      });
+      attached.clear();
+    };
+  }, [mx, event]);
+}

src/app/hooks/useSessionSync.ts

@@ -0,0 +1,36 @@
+import { useEffect } from 'react';
+import { getFallbackSession, subscribeSessionChanges } from '../state/sessions';
+
+/**
+ * Keep this tab in sync with session changes performed in other tabs/windows.
+ *
+ * The coordinator mounts this once inside the authenticated client shell.
+ * `storage` events fire only in tabs that did NOT perform the write, so the
+ * callback here always represents an out-of-tab change.
+ *
+ * Default action is the safest one for auth-critical state — a full reload:
+ *  - session REMOVED elsewhere (logout / localStorage.clear()) → the access
+ *    token disappears, so we reload; the router bounces to auth on next boot.
+ *  - session APPEARED or its access token CHANGED elsewhere (a fresh login or
+ *    a token rotation) → we reload so the client re-initialises with the new
+ *    credentials rather than running on a stale/revoked token.
+ *
+ * A change that does not alter the access token (e.g. an OIDC metadata-only
+ * rewrite) is ignored, which also collapses the several storage events emitted
+ * by a single dual-write into at most one reload.
+ */
+export const useSessionSync = (): void => {
+  useEffect(() => {
+    // Snapshot the credential this tab booted with; compare against it so we
+    // only reload on a genuine credential change.
+    const initialAccessToken = getFallbackSession()?.accessToken ?? null;
+
+    const unsubscribe = subscribeSessionChanges((session) => {
+      const nextAccessToken = session?.accessToken ?? null;
+      if (nextAccessToken === initialAccessToken) return;
+      window.location.reload();
+    });
+
+    return unsubscribe;
+  }, []);
+};

src/app/hooks/useSoundboard.ts

@@ -0,0 +1,101 @@
+import { useCallback, useEffect, useState } from 'react';
+import { useMatrixClient } from './useMatrixClient';
+import { useAccountDataCallback } from './useAccountDataCallback';
+import { AccountDataEvent } from '../../types/matrix/accountData';
+import {
+  SoundboardClip,
+  SoundboardContent,
+  SOUNDBOARD_MAX_CLIP_BYTES,
+  SOUNDBOARD_MAX_CLIPS,
+  SOUNDBOARD_NAME_MAX,
+  readSoundboardClips,
+} from '../utils/soundboardClips';
+
+const KEY = AccountDataEvent.LotusSoundboard;
+
+/**
+ * [P5-15] Read/write the user's personal soundboard, stored in the
+ * `io.lotus.soundboard` account data event (synced across devices like custom
+ * emoji/sticker packs). Uploading writes the audio to the media repo and
+ * appends an mxc reference.
+ */
+export function useSoundboard(): {
+  clips: SoundboardClip[];
+  addClip: (file: File, name?: string) => Promise<void>;
+  removeClip: (id: string) => Promise<void>;
+  renameClip: (id: string, name: string) => Promise<void>;
+} {
+  const mx = useMatrixClient();
+  const [clips, setClips] = useState<SoundboardClip[]>(() => readSoundboardClips(mx));
+
+  useAccountDataCallback(
+    mx,
+    useCallback((evt) => {
+      if (evt.getType() === KEY) {
+        const content = evt.getContent<SoundboardContent>();
+        setClips(Array.isArray(content?.clips) ? content.clips : []);
+      }
+    }, []),
+  );
+
+  useEffect(() => {
+    setClips(readSoundboardClips(mx));
+  }, [mx]);
+
+  const persist = useCallback(
+    async (next: SoundboardClip[]) => {
+      const content: SoundboardContent = { clips: next };
+      await (
+        mx as unknown as { setAccountData: (t: string, c: unknown) => Promise<void> }
+      ).setAccountData(KEY, content);
+    },
+    [mx],
+  );
+
+  const addClip = useCallback(
+    async (file: File, name?: string) => {
+      const current = readSoundboardClips(mx);
+      if (current.length >= SOUNDBOARD_MAX_CLIPS) {
+        throw new Error(`Soundboard is full (max ${SOUNDBOARD_MAX_CLIPS} clips).`);
+      }
+      if (file.size > SOUNDBOARD_MAX_CLIP_BYTES) {
+        throw new Error('Clip is too large (max 1 MB).');
+      }
+      const res = await mx.uploadContent(file, { type: file.type || 'audio/mpeg' });
+      const mxc = res.content_uri;
+      if (!mxc) throw new Error('Upload failed.');
+      const label = (name ?? file.name.replace(/\.[^/.]+$/, ''))
+        .trim()
+        .slice(0, SOUNDBOARD_NAME_MAX);
+      const clip: SoundboardClip = {
+        id: `${Date.now()}-${Math.random().toString(36).slice(2, 8)}`,
+        name: label || 'Clip',
+        url: mxc,
+        mimetype: file.type || undefined,
+        size: file.size,
+      };
+      await persist([...current, clip]);
+    },
+    [mx, persist],
+  );
+
+  const removeClip = useCallback(
+    async (id: string) => {
+      const next = readSoundboardClips(mx).filter((c) => c.id !== id);
+      await persist(next);
+    },
+    [mx, persist],
+  );
+
+  const renameClip = useCallback(
+    async (id: string, name: string) => {
+      const trimmed = name.trim().slice(0, SOUNDBOARD_NAME_MAX);
+      if (!trimmed) return;
+      const next = readSoundboardClips(mx).map((c) => (c.id === id ? { ...c, name: trimmed } : c));
+      await persist(next);
+    },
+    [mx, persist],
+  );
+
+  return { clips, addClip, removeClip, renameClip };
+}

src/app/hooks/useTauri.ts

@@ -0,0 +1,35 @@
+import { useEffect, useRef } from 'react';
+
+// Tauri v2 injects `__TAURI_INTERNALS__` into the webview at runtime; we use it
+// directly so cinny doesn't need `@tauri-apps/api` as a dependency. Native Rust
+// modules push data back to the web by dispatching DOM CustomEvents (see
+// `emit_to_web` in cinny-desktop's `native` module), which `useTauriEvent`
+// subscribes to. This module is the single source for the desktop bridge that
+// every `useTauri*` feature hook builds on.
+type Invoke = (cmd: string, args?: Record<string, unknown>) => Promise<unknown>;
+
+export const tauriInvoke = (): Invoke | undefined =>
+  (window as unknown as { __TAURI_INTERNALS__?: { invoke: Invoke } }).__TAURI_INTERNALS__?.invoke;
+
+export const isTauri = (): boolean => tauriInvoke() !== undefined;
+
+/** Fire-and-forget invoke that no-ops (and never throws) outside Tauri. */
+export const invokeTauri = (cmd: string, args?: Record<string, unknown>): void => {
+  tauriInvoke()?.(cmd, args).catch(() => undefined);
+};
+
+/**
+ * Subscribe to a CustomEvent dispatched from the Rust side via `emit_to_web`.
+ * The handler is kept in a ref so callers don't need to memoize it to avoid
+ * re-subscribing. No-op outside Tauri.
+ */
+export function useTauriEvent<T = unknown>(name: string, handler: (detail: T) => void): void {
+  const handlerRef = useRef(handler);
+  handlerRef.current = handler;
+  useEffect(() => {
+    if (!isTauri()) return undefined;
+    const listener = (e: Event): void => handlerRef.current((e as CustomEvent<T>).detail);
+    window.addEventListener(name, listener);
+    return () => window.removeEventListener(name, listener);
+  }, [name]);
+}