# Lotus Chat — Work Backlog

**Repo:** `lotus` branch at `https://code.lotusguild.org/LotusGuild/cinny`
**Deploy:** push to `lotus` → CI → auto-deploy to `chat.lotusguild.org` (~11 min)

> Completed features are documented in [LOTUS_FEATURES.md](./LOTUS_FEATURES.md). Manual test steps live in [LOTUS_TESTING.md](./LOTUS_TESTING.md). This file is **open work only** — resolved audit findings and shipped-feature write-ups were removed 2026-07 (full history in git).

Status legend: `[ ]` pending · `[~]` in progress / shipped-awaiting-QA · `[x]` done · `[BLOCKED]` server/upstream-gated · `[DEFERRED]`/`[DROPPED]`/`[WON'T FIX]` decided.

---

## ⚠️ TDS DESIGN LAW — READ BEFORE TOUCHING ANY UI

> **ALL Lotus Terminal Design System (TDS) styling — colors, animations, glows, borders, fonts, spacing — MUST come exclusively from `/root/code/web_template/base.css` CSS variables.**
> Do NOT hardcode hex values. Do NOT invent new variable names. Canonical tokens: `--lt-accent-orange`, `--lt-accent-cyan`, `--lt-accent-green`, `--lt-glow-*`, `--lt-box-glow-*`, `--lt-border-color`, `--lt-font-mono`. Syntax-highlight token classes: `.tok-kw .tok-str .tok-num .tok-cmt .tok-fn`.
> Reference patterns: `/root/code/tinker_tickets/` (markdown.js, base.js, ticket.css). Applies to every task without exception.
> New components must respect both TDS dark (`LotusTerminalTheme`) and TDS light (`LotusTerminalLightTheme`); non-TDS theme work uses vanilla-extract (match `src/lotus-terminal.css.ts`).

## 🧩 NATIVE-CINNY LAW — EVERY FEATURE MUST FEEL LIKE STOCK CINNY

> **Every feature must feel native to upstream Cinny — indistinguishable from what the Cinny team would ship.** Reference: <https://github.com/cinnyapp/cinny>.
>
> - **Use the `folds` design system, not bespoke UI** (`Button`, `Chip`, `IconButton`, `Menu`, `MenuItem`, `Dialog`, `Modal`, `Input`, `Switch`, `Badge`, `SettingTile`, `SequenceCard`, …) and folds tokens (`color.*`, `config.space.*`, `config.radii.*`). **Use folds `Icon`/`Icons`, never literal emoji, in UI chrome.** No hardcoded hex/`rgba()`, no invented CSS variables.
> - **Match Cinny's existing patterns** — find the closest existing component/flow and mirror it before adding UI.
> - **The ONE exception:** explicit **TDS** features, which follow the TDS Design Law above (opt-in, only in Lotus Terminal mode).

---

## ✅ Audit (2026-07) — closed out

A three-wave feature bug-hunt (~15 parallel agents, each batch independently reviewed) plus a low-tail cleanup. All confirmed 🔴/🟠 and the clean 🟡 tail are **fixed, reviewed, and gate-green**; details in git history + LOTUS_FEATURES. Only the minor items below remain open.

**Still open (low tail — all 🟡 minor):**

- ✅ **Low-tail batch FIXED** (`a267e9e9`, 2-agent-reviewed, gate-green): **T5** (`participated` now also scans the local thread timeline, not just the server bundle → no under-notify), **T6** (room "Mentions & Keywords" honored for Default thread replies via a new `roomMentionsOnly` gate → no over-notify; +4 tests), **T7** (thread-mode account-data writes serialized with content carried forward → no lost update), **C-L2** (a real incoming ring cancels a lingering Settings preview), **C-L3** (ringtone AudioContext primed on first page gesture → first ring after cold load not silent), **C-L5** (`useCallSpeakers` depends on a stable boolean → no observer churn on membership change), **F5** (OIDC refresher forwards the refreshed token `expiry` as `expiresInMs` → `expiresAt` no longer stale across reloads). **Verified already-handled, no change:** **N6** (`useMemberAvatar` already subscribes via `useRoomMemberChange`), **H10** (`RoomProfile` already has `maxLength={255}` + surfaces the submit error).
- **Calls host (still open):** C-M1 deafen DOM-fallback leaks late-added `<audio>` tracks; C-M2 `.click()`-by-testid toggles no-op if EC renames — **both retire via EC-fork P6-2**. C-L1 AFK mic not released if EC elides the echo; C-L7 all-muted DOM miscount if EC label format differs; C-L8 PiP sw/nw resize anchor jitter at min size. **All four are EC-DOM/echo-behavior or visual-jitter items — need a real call + the EC iframe to verify; deferred.**
- **Native/desktop:** D7 Unity badge `application://cinny.desktop` id may not match the installed `.desktop` basename — **runtime-verify** on the `.deb`/AppImage.
- **EC fork (EC1–EC6 fixed on `element-call:lotus`, needs a republish):** re-apply `setTimeout` cleanup, remote-gated subscription → `allConnections$`, per-call decoration state leak, re-subscribe-every-render, focus-clear on missing `userId`. Rides with **P6-2 phase 2**.

---

## ✅ Shipped — Awaiting Live Verification

Built and gate-green; verify per [LOTUS_TESTING.md](./LOTUS_TESTING.md), then graduate to LOTUS_FEATURES.md. Includes the **desktop/native Tier A/B stack** (P5-35/36/41/42/43/44/46/47/48/49/55/56/57, P6-1 Linux parity) — all **CI-compile-verified, runtime-verify on Windows/Linux** — plus:

| Area                                                                        | Test guide            |
| :-------------------------------------------------------------------------- | :-------------------- |
| Full-Screen Camera Broadcasts (per-participant focus)                       | A5 / G2               |
| Advanced search filters + virtualized infinite scroll                       | K2 / M1 / M2 / M4     |
| Custom Accent Color Picker (non-TDS) · 5 Color Theme Presets                | M3 / M5               |
| Intersection lazy media loading · context-aware thumbnails                  | H1 / H2               |
| Thread Panel (side drawer) + per-thread notification modes (P4-1)           | (thread QA)           |
| Encrypted message search indexing/caching (opt-in, default OFF)             | search backlog        |
| Remind Me Later · Mobile Bookmarks access                                   | K1 / E5               |
| In-Call Soundboard (P5-15) · Quality Controls (P5-31) · Permissions (P5-31) | D2-7 / D2-8 / D2-9    |
| Desktop proactive update notifications (P5-40)                              | J1                    |
| OIDC/SSO login (P4-6, needs an MSC3861 server — pick mozilla.org on login)  | OIDC                  |
| Windows native WinRT toast quick-reply / click-to-open (D6, AUMID)          | rich-toast (§backlog) |
| Inline media embeds (16 providers: video/audio/post + click-to-play facade) | Q1 / Q2 / Q3 / Q4     |

---

## 🔴 Open — Actionable

### ✅ Discovery pass (2026-07) — DP1–DP18 DONE

Agent-surveyed + TPVR-verified correctness / a11y / tech-debt fixes (DP1–DP18) are implemented, review-fixed, and gate-green (tsc + eslint + 737 tests + build). Verify per [LOTUS_TESTING.md](./LOTUS_TESTING.md) §R, then remove this note. Full detail in git history — commits `8eb961b6` `db864326` `6cf18c3b` `165714e1` `8c0e2b42` `e545706c` `b1ee3ada` `4fc3f7a3` `101e4116` `4fa4327a` `c2598d21`.

### ✅ Discovery pass 2 (2026-07) — perf / security / correctness — DONE

Agent-surveyed findings, each **verified against the code before fixing**, then implemented and gate-green (tsc + eslint + prettier + 857 tests + build), with **two review agents on every staged diff before commit**. Verify per [LOTUS_TESTING.md](./LOTUS_TESTING.md), then remove this note.

- [x] **PERF-1 — presence: 3 client listeners PER avatar → one shared presence store** (3 listeners total). `8a154051`.
- [x] **PERF-2 — `#`-mention autocomplete mutated + re-sorted the shared `allRoomsAtom` every keystroke** → copy + `useMemo` (also fixed a real shared-array mutation hitting ~27 consumers). `4708a179`.
- [x] **PERF-3 — read-receipt rows: ~6 global `Members` listeners per row → one shared member-change store** (`useRoomMemberChange`). `1b8f5545`.
- [x] **PERF-4 — message-search room filter re-sorted every render** → `useMemo`. `4708a179`.
- [x] **PERF-5 — DM-preview `Decrypted` listener ran for every nav item** → gated on `direct`. `4708a179`.
- [x] **SEC-1 / SEC-2 — scheduled-message plaintext + recent searches survived logout** → `clearPlaintextCaches()` on both logout paths, extended to the whole `recent_*` family + nav-paths. `726cefb5`.
- [x] **SEC-3 — `window.open(_blank)` without `noopener`** → `noopener,noreferrer` at 5 sites (SSOStage excluded — needs the handle). `3e1106b2`.
- [x] **SEC-4 — `/acl` self-lockout footgun** → shared `serverAcl.ts` validation, no-brick allow default, fail-closed self-ban guard. `3e1106b2`.
- [x] **COR-1 — space-child UNLINK over-deleted** → targeted `UNLINK` reducer action. `fd3b8b42`.
- [x] **COR-2 — `useCallJoined` stuck true on 2nd-call embed swap** → re-seed on `[embed]`. `1f80d1d1`.
- [x] **COR-3 — incoming-call lifetime guard only corrected future clock-skew** → `Math.abs(...)` (±20s). `ab01d27a`.
- [x] **COR-4 — shared notify-dedupe slot double-notified** → key by `roomId|threadId`. `1f80d1d1`.
- [x] **COR-5 — upload cancel ignored during retry back-off** → `AbortSignal` threaded into the retry loop. `ab01d27a`.
- [x] **COR-6 — `CallControl.forceState` dropped `screenshareAudioMuted`** → passes it. `ab01d27a`.

**Deferred / decided (not built):**

- [DEFERRED] **PERF-6 — avatar-decoration `/profile` fetch** — well-guarded (module cache + in-flight dedupe + backoff); a network/HS-load note only. Batch/skip only if it proves costly.
- [DEFERRED] **SEC-5 — embeds' `allow-popups-to-escape-sandbox`** — informational; main-app hijack already prevented (no `allow-top-navigation`), and popups are arguably needed for "open in provider." Revisit with per-provider verification if dropped.
- **KE-1 preventive (`navigator.storage.persist()`)** is **already implemented** (`initClient` → `requestPersistentStorage()` + `src/index.tsx` boot). The rest of the KE cluster stays under **Encryption / E2EE** below (needs live capture).

### 🔍 Feature bug hunt (2026-07, 5-agent, LOTUS_FEATURES surface) — open findings

Per-slice bug hunt (5 agents: theming · calls · messaging · threads/presence/UX · rooms/mod/notif/infra/desktop), each **verified against current code** (already-fixed items not re-flagged; the heavily-audited hot paths came back clean). Residual findings below. `[live]` / `[desktop]` = needs a real call / the desktop app to confirm.

**Embeds / URL previews**

- [x] **[Med] Desktop (Tauri) CSP `frame-src` was missing `store.steampowered.com`, `www.mixcloud.com`, `widget.deezer.com`** → the Steam widget (shipped) + new Mixcloud/Deezer embeds were silently blocked (blank iframe) **in the desktop app**. **FIXED** (`cinny-desktop` `daba59b`): all three added to `frame-src` (no `connect-src` — these don't do a client oEmbed fetch). Web was always fine (`frame-src 'self' https:`). Needs desktop-app QA to confirm the widgets render.
- [x] **[Low]** `searchCache.ts` encrypted-search index has no size/count cap — unbounded on-disk growth (mitigated by the manual "Clear cached index" + logout wipe). **FIXED** (`fff811cb`): per-room cap of 5000 rows, oldest-by-ts evicted on write via a self-chaining IDB cursor + pure unit-tested `evictCount`. IDB-spec correctness (cursor delete/continue, tx liveness, range bracketing) confirmed by 2 review agents since CI can't run IndexedDB.
- [x] **[Low]** `MsgTypeRenderers.tsx` `MLocation` OSM permalink uses raw `geo:` lat/lon substrings, not the validated floats — harmless (URL context, malformed input only). **FIXED** (`8a461610`): permalink uses the `parseFloat`+`isFinite` validated `lat`/`lon` (as the map iframe already did).

**Voice / video calls**

- [x] **[Med]** `DenoiseTester.play()` (Settings → Calls A/B model test) leaks the denoise model node — calls `ctx.close()` but never `denoise.dispose()` (inconsistent with `stopLive`, which disposes) → leaks the DeepFilterNet/DTLN worker/WASM per press. **FIXED** (`c9d9d914`): `stopPlayback` now mirrors `stopLive` (dispose model + gate), and a generation token also closes the rapid-click / stop-during-load / unmount-during-load leak windows (3 review passes, all 6 interleavings traced).
- [x] **[Med] [live]** PiP auto-spotlight never released on return to the call room — the release branch sits inside the `if (!pipMode) return` guard, so screenshare→PiP→back leaves spotlight forced on and `pipAutoSpotlightRef` stuck `true`. `CallEmbedProvider.tsx:733-744`. **FIXED** (`08e19100`, code-level; still wants live QA): effect guards only on `!callEmbed`, releases whenever `pipMode && pipScreenshare` is false; + ref-reset on embed teardown + deps comment (2-agent reviewed).
- [x] **[Low]** DenoiseTester async paths (`getUserMedia`) have no mounted-guard → ctx/stream leak + setState-after-unmount if Settings closes during the mic prompt. **FIXED** (`c9d9d914`): a `mountedRef` guards `startLive`/`startRecord` after the `getUserMedia` await (and `play()` after its model load); the ref is set on mount, not only cleared on unmount, so it survives a StrictMode/Activity remount.
- [x] **[Low]** Soundboard 30s safety timeout never cleared on natural clip end (`CallSoundboard.tsx:115`); `PrescreenControls` `PermissionStatus.onchange` not removed on unmount (`PrescreenControls.tsx:22-28`). **FIXED** (`56561627`): per-play timer token cleared on end/unmount (identity-guarded so a stale clip can't disarm a newer one); permission `onchange` detached + `cancelled`-guarded setState.
- [ ] **[Low] [live]** Call-to-call switch disposes the embed without an explicit `HangupCall` → possible transient ghost RTC membership until EC's unload-leave fires.

**Theming / visuals**

- [x] **[Med]** `invalidateDecorationCache` clears the module cache but has no pub/sub → changing **your own** avatar decoration doesn't update live in already-mounted avatars (timeline/members) until remount. Add a listener set / bump counter. `useAvatarDecoration.ts:67`. **FIXED** (`29ff1654`): per-user listener set notified on invalidation (+ clears the give-up counter); concurrent re-fetches de-dupe via the existing `pending` map.
- [x] **[Med/Low]** Decoration picker grid thumbnails use the raw `DECORATION_CDN` constant instead of `decorationUrl()`, ignoring the `VITE_DECORATION_CDN` override → broken thumbnails if decorations are repointed. `ProfileDecoration.tsx:51`. **FIXED** (`29ff1654`): grid uses `decorationUrl(slug)`.
- [x] **[Low]** Seasonal "Auto" is computed once at mount (no ticker, unlike NightLight) → won't flip across a holiday-window boundary in a long-lived session. `SeasonalEffect.tsx:100`. **FIXED** (`d416c62b`): hourly re-eval ticker (auto only) + refresh on entering auto; decision extracted to pure `resolveSeasonTheme` + tested.
- [x] **[Low]** Selecting seasonal "Auto" while a chat background is set is a silent no-op (asymmetric mutual exclusion — SeasonalEffect early-returns when `chatBackground !== 'none'`). `General.tsx:550`. **FIXED** (`d416c62b`): any active seasonal mode (incl. auto) now clears the chat background; only "off" leaves it (symmetric with the bg picker).
- [x] **[Low]** Decoration settings fetch the `/{field}` sub-resource → console 404 for users with no decoration set. `ProfileDecoration.tsx:79`. **FIXED** (`29ff1654`): reads the full `/profile/{userId}` (matching `useAvatarDecoration`); PUT/save path unchanged.

**Threads / presence / UX**

- [x] **[Med]** `PresenceBadge` renders DND (`unavailable` + `status_msg:'dnd'`) as a **yellow "Idle"** badge + label, while `PresenceRingAvatar` correctly shows **red** — inconsistent. Give the badge the same `status === 'dnd' → Critical` + "Do Not Disturb" branch. `Presence.tsx:17-59`. **FIXED** (`29ff1654`): badge now matches the ring + settings picker (Critical / "Do Not Disturb", `'dnd'` sentinel line suppressed).
- [x] **[Med]** Collapsible-message threshold is hardcoded (`COLLAPSE_MAX_HEIGHT = 320`), but the docs claim it's "configurable in Settings → Appearance (default 20 lines)" — unimplemented. Add the setting + control, or fix the doc. `MsgTypeRenderers.tsx:38`. **FIXED** (doc): LOTUS_FEATURES now describes the fixed 320px (≈20-line) threshold; the full 320px is sensible and a per-user setting wasn't worth the surface — reconciled the doc rather than build a marginal setting.
- [x] **[Med/Low]** In-app toast container has no visible cap / scroll — a burst of messages across rooms while focused stacks toasts unbounded and can cover the viewport. Cap visible N or `overflow-y:auto` + max-height. `LotusToastContainer.tsx:223-247`. **FIXED** (`1963222d`): queue capped at 5 in the atom writer (drops oldest non-sticky, never the newest or a sticky action toast) + container maxHeight/overflow + scroll-to-newest; +4 tests. (3 review passes — the 2nd caught a newest-dropped edge when the cap is full of stickies.)
- [x] **[Low]** "Unread First" room sort leaves the (larger) read portion unordered — no activity fallback for the equal-unread case. `Home.tsx:213-222`. **FIXED** (`1963222d`): `factoryRoomIdByUnread` breaks ties by recent activity; relocated to `utils/sort.ts` (pure) + unit-tested.
- [x] **[Low]** Tab title "(N)" counts mentions, not unread messages (doc says unread) — reconcile doc vs. code. `ClientNonUIFeatures.tsx:120-123`. **FIXED** (doc): the mention-count + unread-dot behavior is intentional (mirrors the favicon); LOTUS_FEATURES now describes it accurately (N = highlights, `·` = other unread).

**Rooms / moderation / notifications / infra / desktop**

- [ ] **[Med] [desktop]** `useTauriFocusAssist` never queries the initial OS Focus-Assist state on mount (unlike `useTauriDnd`, which rehydrates via `get_tray_dnd`) → if Focus Assist is already ON at launch, notifications/sounds leak through until the OS state next flips. Add a `get_focus_assist` mount query (confirm whether the native poll emits an initial reading). `useTauriFocusAssist.ts:18-24`.
- [x] **[Low]** Push-rule enable toggle holds stale local `useState` after an external rule change (toggled on another device) — sync from the `pushRule.enabled` prop. `PushRuleEditor.tsx:55-79`. **FIXED** (`2c0cd0d2`): `useEffect` resyncs on `pushRule.enabled` change (prop flows from live `useAccountData(m.push_rules)`; no optimistic conflict).
- [x] **[Low]** Server-support `.well-known/matrix/support` is fetched from `mx.getHomeserverUrl()` (client-API host) instead of the MXID **server-name** host → silently missing on delegated/split-domain servers. `About.tsx:45-47`. **FIXED** (`2c0cd0d2`): fetched from `https://{mx.getDomain()}` (MSC1929-correct); identical for non-delegated, graceful catch otherwise.
- [x] **[Low]** Cleared/partial quiet-hours `time` input (`''` → window inactive) silently disables the window while the toggle still reads "on" — no feedback. `SystemNotification.tsx:364-382`. **FIXED** (`5175c095`): inline Critical hint when the toggle is on but a time field is empty.
- [~] **[Low] [desktop]** Native quick-reply swallows send errors (`.catch(() => undefined)`); the `show_rich_toast` trigger has no verified web-side caller. `useTauriToastActions.ts:35-38`. **ROOT CAUSE FOUND + web fix shipped** (`0ddf86c6`): `show_rich_toast` was dead because `showOsNotification` preferred the service worker (WebView2 has one), shadowing the injected `window.Notification` shim. Now skips the SW path under Tauri → notifications route to the rich toast, whose click navigates to the message.

### 🖥️ Desktop notification rich-toast — follow-ups (activated by `0ddf86c6`, need a Windows build)

The web-side nav fix (`0ddf86c6`) makes the native rich-toast path live for the first time. It fixes click→navigate, but exposes latent behaviors in the **cinny-desktop Rust** that need a Windows build to fix + verify:

- [ ] **[Med] [desktop]** **Tag-coalescing lost.** The web SW notification used `tag` to _replace_ prior notifications for the same room; `show_rich_toast` (`cinny-desktop/src-tauri/src/native/toast.rs`) ignores `tag` and shows a new WinRT toast every time → rapid same-room messages stack instead of collapsing. Fix: dedupe/replace by room in the toast store (`toast.rs:226-230`).
- [ ] **[Med] [desktop]** **Thread / invite quick-reply misroutes.** The reply target is the coalescing `tag` — `${roomId}:${threadId}` for thread replies, `'lotus-invites'` for invites (`ClientNonUIFeatures.tsx:471,192`) — not a real room id, so `mx.sendMessage(tag, …)` fails silently (`useTauriToastActions.ts:37`). Body-click navigation is correct (uses `path`). Fix: pass the real `roomId` separately (e.g. `data.roomId`) and have the shim (`lib.rs` `NOTIFICATION_BRIDGE`) + `toast.rs` use it for the reply target; keep `tag` for coalescing. Invite toasts should also drop the reply box (nothing to reply to).
- [ ] **[desktop QA] Windows notification checklist** (verify `0ddf86c6` + the above): (1) confirm the pre-fix symptom was focus-without-navigate; (2) message toast → click navigates to the message, quick-reply sends to the room; (3) thread toast → navigates, reply currently misroutes (until fixed above); (4) invite toast → navigates to invites; (5) rapid same-room messages → stacking until coalescing restored; (6) AUMID-missing/dev build → plain-notification fallback still shows; (7) web PWA unaffected.
- [x] **[Low]** Export-history date-range early-break can over-paginate + mislabel "truncated" in E2EE rooms (`oldestRawTs` only advances on decrypted `m.room.message`, so undecryptable old events never move it). `ExportRoomHistory.tsx:104,136`. **FIXED** (`3ff8fb8e`): boundary now advances on every event (getTs is envelope metadata), above the type/decryption filters; guarded `ts > 0` so a bogus 0-ts can't cause the opposite (silent under-pagination). 2-agent reviewed.
- [x] **[Info/doc]** `PolicyListViewer` is a manual room-ID/alias viewer with **no** subscribe/unsubscribe controls and no subscribed-lists listing — `LOTUS_FEATURES.md:1287` describes both. Docs oversell; not a runtime bug. **FIXED** (`8a461610`, doc): LOTUS_FEATURES corrected to describe the read-only room-ID/alias viewer (no subscribe controls).

### ✅ Composer autocomplete-insert crash (reported 2026-07) — FIXED (`477df4ae`)

Picking an autocomplete item (mention/emoji/command) occasionally tripped the composer error boundary ("encountered an error" → forced refresh) even though the element inserted. Root-caused (3 agents, incl. a headless slate simulation) to `moveCursor` deferring its cursor work to `setTimeout`, leaving the caret on the just-inserted inline-void's zero-width edge; slate-react's commit-phase `setBaseAndExtent(voidEdge, 1)` then threw `IndexSizeError` mid-render → boundary. **Fix:** do `Transforms.move` (escape the void) + `insertText(' ')` synchronously in the same commit as the insert, so the caret is a resolvable text point when the selection sync runs. Plus a recoverable boundary ("Reload composer" + `onReset` deselect) so any residual composer crash no longer needs a page refresh. (A first "sync insertText without move" attempt was caught in review — the void guard drops the space + traps the caret; `move` is required.)

### ✅ Unread/read-receipt flakiness (reported 2026-07) — FIXED (pending prod QA)

Room unread dots were inconsistent: reading a message sometimes cleared the dot, sometimes left it stuck, sometimes it resurrected. Root cause (confirmed by tracing + diffing upstream cinny `dev`): **our own "N4" change.** `handleReceipt` recomputed via `getUnreadInfo`, which reads `room.getUnreadNotificationCount()` — server-computed and **stale on the synchronous synthetic receipt echo** (SDK only zeroes it immediately when the last event is your own message) → it PUT the stale non-zero count back → stuck/resurrecting. Compounded by `hasUnread = !!unread` lighting the dot on any present map entry, incl. phantom `{0,0}` PUTs from our `UnreadNotifications` listener. Plus a Mark-as-Unread (MSC2867) flag that never cleared on opening an already-read room (no receipt → no auto-clear).

**Fix:** `roomToUnread.ts` — `handleReceipt` reverts to upstream's optimistic `DELETE` on own receipt; reducer collapses `{0,0}` PUT → DELETE. `notifications.ts markAsRead` clears the marked-unread flag directly. `markedUnread.ts onReceipt` gated to main/unthreaded receipts (`myMainReceiptPresent`). Unit tests added; 700/700 pass, typecheck + build clean. Deploy + manual QA (read → dot clears & stays; thread read; mark-unread → open → clears; reconnect no resurrect).

### 🧨 Encryption / E2EE — ⚠️ EXTREME COMPLEXITY · 🧠 PLANNING SESSION REQUIRED

Observed live in prod 2026-06-30 during a 2-person **Element Call** (E2EE). These span client rust-crypto (`matrix-js-sdk@41.7.0`) ↔ Synapse ↔ EC MatrixRTC E2EE and are **interrelated** — do NOT spot-fix. **Capture first:** run **Settings → Developer Tools → Crypto Diagnostics** during the next affected call + a synapse-side trace before any fix. (Full runbook was in `LOTUS_E2EE_INVESTIGATION.md`, now in git history.) None are caused by the EC fork work.

- **KE-1 — OTK upload conflict storm (CRITICAL, root-cause candidate).** `POST /keys/upload` returns `400 M_UNKNOWN: One time key … already exists` continuously — the rust-crypto store and Synapse have **diverged OTK state** (upstream `matrix-rust-sdk#5200`, OPEN: on the 400 the SDK never marks the request sent → re-uploads forever; **not** fixed in 41.7.0). Leading web trigger: cinny never calls **`navigator.storage.persist()`**, so the IndexedDB crypto store is evictable while the `localStorage` session survives → device resurrects with a blank store. **Buildable preventive fix (no call needed):** request persistent storage on login (+ optional multi-tab guard + a 400-loop→recovery prompt). Healing an already-diverged device still needs a clean logout+login.
- **KE-2 — EC media keys not arriving/decrypting → audio/video cut out (CRITICAL).** `MissingKey … for participant`, unexpected encrypted to-device `io.element.call.encryption_keys`. Almost certainly downstream of KE-1 (broken Olm sessions). This is the "friend's audio cuts out" symptom.
- **KE-3 — Timeline decrypt error: missing `algorithm` field (HIGH).** rust-crypto can't parse a malformed/legacy encrypted event — capture the offending event id + raw content.
- **KE-4 — MatrixRTC delayed-event / membership timeouts (MEDIUM-HIGH).** `Restart delayed event timed out`, repeated `msc4157.update_delayed_event` — may be partly HS responsiveness; correlate with synapse latency. Same planning session (shares the call-reliability surface).

### Security & Privacy

- **N97 — Access token + device id in plaintext `localStorage`** (`state/sessions.ts`), XSS-exposed. Architectural — needs a token-protection / session-storage redesign.
- **Persisted PII without encryption:** user status message + expiry (`Profile.tsx`), unsent composer drafts (`RoomInput.tsx`). Leak risk on shared devices.

### PWA / Offline / Web Push

- **N107 — Web Push is non-functional:** `src/sw.ts` has no `push` handler. Needs a `push` listener + Matrix push-gateway integration. **The one substantive remaining feature** (session/crypto groundwork it waited on has landed).
- **No app-asset caching strategy** in `src/sw.ts` — no offline capability.

### Dependencies / Build / Hygiene

- Build-time: `lotusDenoise` does heavy sequential `fs` in `closeBundle`; `viteStaticCopy` has redundant renames — could be streamlined.
- `patch-folds.mjs` edits `node_modules` directly (robust today; `patch-package` considered but more brittle to folds restructuring — WON'T-DO unless it breaks).
- `types/matrix/` mirrors SDK types instead of importing them — drift risk; spot-fix highest-risk only.
- `contrib/nginx`/`contrib/caddy` examples: headers + `try_files` already synced with prod; the prod nginx `add_header` isn't inherited by cache `location` blocks (pre-existing; SPA entry `/` still gets all headers).
- `as any` casts across `src/` — gradual typing cleanup. Keep commits scoped (bisect-friendly). Keep README fork-sync version/logo current.

---

## 🌐 Matrix Protocol Gaps

Genuine Matrix client-spec / MSC features Lotus does **not** yet implement (audited 2026-07 against the codebase — almost everything else is built: pinning, stickers+picker, room directory, mutual rooms MSC2666, blurhash, key backup/recovery/SSSS, SAS verification, ignore list, invite spam-filter, voice messages, polls, threads, spaces, OIDC, extended profiles, delayed events, authed media). Build each **fully** — spec-correct events, native-Cinny folds UI, tests. Order = clean wins first.

**Phase A ✅ (2026-07, gate-green 683 tests):**

- [x] **Mark as Unread — MSC2867 `m.marked_unread`.** Room account data `{ unread: true }` (+ unstable `com.famedly.marked_unread`) via `mx.setRoomAccountData`; clear on read. Context-menu item in `RoomNavItem` + light the existing unread dot; integrate `state/room/roomToUnread.ts`.
- [x] **Low Priority rooms — `m.lowpriority` tag.** Mirror the favourite impl (`RoomNavItem.tsx:331-337` `setRoomTag/deleteRoomTag` + the favourites category in `home/Home.tsx`): context-menu toggle + a collapsed "Low Priority" category sorted to the bottom, excluded from normal unread nudging.

**Phase B ✅ (2026-07, gate-green 688 tests):**

- [x] **Disappearing Messages — MSC1763 `m.room.retention`.** PL-gated room-settings `SettingTile` to set `{ max_lifetime }`; retention badge; a client-side sweep hides/self-redacts own expired events (pattern like the mute-timer restore in `ClientNonUIFeatures.tsx`). True server deletion also wants Synapse `retention:` (LXC 151).
- [x] **QR Device Verification — reciprocate QR.** Add the QR path beside emoji-SAS in `components/DeviceVerification.tsx`: render with `qrcode.react` (already a dep), scan via `BarcodeDetector` (fallback `jsQR`); uses the SDK `VerificationRequest` QR/reciprocate support.

**Phase C (Room Widgets ✅ 2026-07; Sliding Sync ❌ evaluated — parked):**

- [x] **Room Widgets — MSC1236 + widget API.** No general widget UI exists (only the PL entry `im.vector.modular.widgets`; the EC call widget is hardcoded). Read `im.vector.modular.widgets`/`m.widget` state, add an Add/Manage panel + sandboxed iframe renderer via `matrix-widget-api` — **extend the existing EC widget plumbing** (`plugins/call/CallEmbed.ts`). Enables Etherpad/notes/dashboards/integrations.
- **[PARKED] Sliding Sync — MSC3575 / simplified MSC4186** (evaluated 2026-07, 3 research passes). Server side is GA (`simplified_msc3575`), but the **client** side is not viable for a safe rollout: matrix-js-sdk's `SlidingSync`/`SlidingSyncSdk` are `_internal_`/`@experimental` (Element shipped labs-only, never GA in ~2 yrs, moved to the Rust SDK); **presence isn't delivered over sliding sync** (regresses Lotus presence badges/rings/status); **no upstream Cinny impl** to follow; and Cinny's whole nav (sidebar/spaces/DM/unread) is derived from the **full local room set** (`allRoomsAtom` ← `mx.getRooms()`), so ~14 subsystems (4 core) need re-architecting to a server-windowed list. ~10% confidence a full rollout wouldn't break/regress (missing rooms/messages/unread = worst failure class). **Revisit only if we adopt the Rust SDK or accounts grow large enough that startup latency is a real complaint; an off-by-default experimental spike is possible but not recommended.** Full assessment: git plan history.

**Room Widgets v1 follow-ups:** capability-approval consent prompt (let widgets request send/read room events); Jitsi/stickerpicker special types; account-data (user/sticker) widgets; per-widget popout / always-on-screen. Requires the prod CSP `frame-src` widening (done in `matrix/cinny/nginx.conf` → **`nginx -s reload`**) or external widgets are blocked.

**Server-gated / advanced (capture, don't build yet):** QR sign-in for a new device (**MSC4108** rendezvous — needs an HS-side endpoint); dehydrated devices (**MSC3814** — offline key delivery, also helps the E2EE KE cluster); E2EE history key sharing on invite (**MSC3061** `shared_history`, niche); voice broadcast (Element MSC3888, low value — skip).

### [PARKED] Matrix 2.0 call membership — MSC4354 Sticky Events (investigated 2026-07, 3 agents + live infra check)

Move MatrixRTC/Element Call call-membership from state events (MSC3401) to **sticky events** — the "Matrix 2.0" path. **Not a flag flip; a coordinated rollout. Parked deliberately.**

Findings:

- **Server (Synapse 1.157.1, LXC 151):** `msc4354_enabled` defaults `false`. Enabling is **low-risk, additive, reversible** — schema (`sticky_events` table) already ships unconditionally, no migration/backfill, all runtime paths flag-gated, residual rows self-expire ≤1h. The one historical `/sync` EDU-filter bug (#19787) was fixed in 1.155.0; SQLite guard N/A (we're Postgres).
- **The flag alone is a no-op for behavior.** Our EC fork (upstream **v0.20.1** base, `@lotusguild/element-call-embedded`, bundled into Cinny at build → fleet upgrades atomically) gates sticky mode behind BOTH server support AND a per-device **developer-settings** radio (`matrix-rtc-mode`, defaults `Legacy`). Enabling the flag only un-greys that radio; no client changes what it sends until a human toggles it.
- **Matrix-layer mixed-mode = safe:** js-sdk (v41.6.0) reads + merges sticky and state membership, so cross-mode participants see each other.
- **Open risk before any real rollout:** media layer. Sticky mode drops `livekit_alias` + uses lk-jwt-service `/get_token` (slot `m.call#ROOM`); legacy uses `/sfu/get` (`room=roomId`). Both endpoints are **live** on our lk-jwt-service, but whether they resolve to the **same LiveKit room** is unverified — must confirm with a **two-account cross-mode test call** (one device `Matrix_2_0`, one `Legacy`) before changing the default, else split-at-media.

To actually adopt (future): (1) enable `msc4354_enabled: true` + restart; (2) two-account media-interop test; (3) if unified, flip EC default mode `Legacy`→`Compatibility`/`Matrix_2_0` in the fork + redeploy; (4) keep legacy fallback during transition. **No user benefit until step 3.**

### [ ] Matrix 2.0 call membership — MSC4354 sticky events (INVESTIGATED 2026-07, deliberately NOT enabled)

3-agent investigation after the 1.157.1 upgrade (EC-fork behavior · Synapse/upstream readiness · client-fleet composition). **Conclusion: leave `msc4354_enabled` OFF for now** — enabling it is safe but delivers **zero user-visible benefit on its own**, and introduces a latent footgun.

**Why it's a no-op alone:** the EC fork's `doesServerSupportUnstableFeature(MSC4354)` probe feeds **exactly one thing** — whether the "Matrix 2.0" radio in **Developer Settings** is greyed out (`DeveloperSettingsTab.tsx:349-353`). The real switch is the per-device `matrixRTCMode` setting (`settings.ts:149-152`), which **defaults to `Legacy`** and never auto-enables. Sticky sending is gated at `LocalMember.ts:862` (`unstableSendStickyEvents: mode === Matrix_2_0`). So flipping the server flag changes nothing any client sends.

**Verified safe:** Synapse-side is **additive and cleanly reversible** — the `sticky_events` schema ships unconditionally (no migration/backfill on enable), every write/read/serialize/replication path is flag-gated, disabling stops it instantly and residual rows self-expire ≤1h. The one relevant bug (#19787 `/sync` EDU-filter) was fixed in 1.155.0; the SQLite<3.40 guard doesn't apply (we're on PG 17.10). Matrix-layer **mixed-mode visibility is safe**: js-sdk `collectMembersEvents` reads **both** sticky and state membership and merges them, so sticky-mode and legacy-mode participants see each other. Our `lk-jwt-service` already serves **both** JWT endpoints (legacy `/sfu/get` **and** the sticky-mode `/get_token` — both probed live, 400-with-validation-error = present). EC is bundled into cinny's build (`@lotusguild/element-call-embedded`), so the fleet upgrades **atomically** — the "all EC clients ≥ v0.17.0" precondition is structurally guaranteed for our own users.

**The one unresolved risk (blocks a real rollout, not the flag):** sticky mode drops `livekit_alias` and uses `/get_token` (slot `m.call#ROOM`) while legacy uses `/sfu/get` (`room=roomId`). **Whether both resolve to the same LiveKit room is a property of lk-jwt-service, not the client** — unverified. If they diverge, cross-mode participants appear in each other's member list but are **split at the media layer** (silent, no error). Requires a **two-account test call** (one device on Legacy, one on Matrix 2.0) to confirm before anyone relies on it.

**If we ever do this:** (1) run the two-account media-interop test; (2) only then consider enabling `msc4354_enabled: true` in `/etc/matrix-synapse/homeserver.yaml` (LXC 151) + restart; (3) treat a default-mode change as a separate coordinated EC rollout. MSC4354 is still **OPEN upstream** (not in FCP, `needs-implementation`), so this stays experimental regardless.

### Remaining spec/MSC gaps (2026-07 full-surface survey)

After Phases A–C the client spec is ~complete. What's left, flagged by **what unblocks it**:

**✅ Buildable NOW (client-only, no server/infra change):**

- [ ] **Custom room tags / sections** — user-defined room categories in the sidebar via standard `u.*` room tags (beyond the built-in Favourite / Low-Priority). Mirrors the favourite/low-priority category pattern (`RoomNavItem` context-menu + `Home.tsx` categories). _Medium._ The only substantive client-only feature left.

**🔧 Needs INFRASTRUCTURE (NOT a Synapse-flag flip — you'd have to stand it up):**

- **Invite by email / 3PID invite** — we invite by Matrix user-ID only (`mx.invite` is user-ID-only). Email invites need an **identity server** (lotusguild runs none). Build only if an identity server is deployed.
- QR sign-in for a new device (**MSC4108**) — needs a **rendezvous** endpoint. Dehydrated devices (**MSC3814**) — needs server support. (Also listed above.)

**🚫 BLOCKED until a Synapse upgrade enables the flag** — re-run `/_matrix/client/versions` `unstable_features` after each upgrade; client work is ready the moment the flag flips. See the **Blocked Features** section below:

- Live Location Sharing (**MSC3489** + **MSC3672** — both `false`)
- Reaction / relation redaction (**MSC3892** — `false`)
- ~~Room preview before joining (MSC3266)~~ — **DONE** (client was always built; unstable `im.nheko.summary` endpoint returns 200 — verified on 1.156)
- Thread subscriptions (**MSC4306** — `false`)

**Niche / low-value (noted, not planned):** E2EE history-key-on-invite (MSC3061), voice broadcast (MSC3888), a native account-deactivation flow (currently delegated to the OIDC provider for OIDC accounts).

**Already implemented (verified, not gaps):** space reordering (drag — confirmed working in the desktop client), pinning, stickers + picker, room directory, mutual rooms (MSC2666), blurhash, key backup / recovery / SSSS / cross-signing / key export-import, SAS **and** QR verification, ignore list, invite spam-filter, voice messages, polls, threads + per-thread notifs, spaces, OIDC, extended profiles, delayed/scheduled events, authed media, report user/room/message, 3PID contact-info display, disappearing messages, mark-unread, low-priority, room widgets.

---

## 📋 Open Feature Backlog

### [ ] Basic in-app audio editor / video→audio extractor (LARGE PROJECT)

A minimal audio editor for soundboard clips and voice content. Scope: (1) **trim/clip** an audio file to a chosen start/end (waveform scrubber, in/out handles); (2) **upload a video file → strip and discard the video track, keep only the audio** (extract audio, then the source video is dropped — never uploaded/stored); (3) minimal edits only (trim, maybe gain/normalize, fade in/out) — not a full DAW. Likely Web Audio API (`AudioContext.decodeAudioData` → trim `AudioBuffer` → re-encode) + `MediaRecorder`/an encoder for output; video demux via a `<video>`+`MediaElementSource` capture or ffmpeg.wasm (weigh bundle cost). Feeds the soundboard uploader (`utils/soundboardClips.ts`, `SoundboardPackEditor`) and attachments. Design under TDS + native-cinny law. Big build — plan a dedicated session; evaluate ffmpeg.wasm size/CSP (wasm) before committing.

### [x] P4-4 · Math / LaTeX Rendering — DONE

Rendering shipped (KaTeX, `$…$`/`$$…$$` + spec `data-mx-maths`, lazy-loaded,
`<pre>/<code>`-guarded) — see LOTUS_FEATURES.md. **Outgoing cross-client interop
added (2026-07):** the composer now emits spec `data-mx-maths` HTML on send
(`editor/output.ts`, reusing `splitMathSegments`), so math a Lotus user types
renders on Element and every other client, not just Lotus. Deferred: multi-line
block `$$…$$` (spans editor paragraph nodes) still renders on Lotus via the
plain-body `$…$` path only.

### [~] P5-20 · Quick Reply from Browser Notification (partial)

Done: notifications show the real body, click navigates to the specific event + focuses the tab. **Remaining:** inline reply via Notification Actions API needs the SW `push`+`notificationclick` pipeline (switch `new Notification()` → `serviceWorkerRegistration.showNotification()` so the SW receives `notificationclick`; on `event.action==='reply'` POST `m.room.message` with the stored `{roomId, threadId}`). Ties into N107.

### [~] P5-30 · Advanced ML Noise Suppression — open verification

Shipped in the EC fork (DeepFilterNet3 default-capable / DTLN / RNNoise / Speex; AEC on, AGC off for ML tier; never-silent watchdog). **Open:** real-call by-ear **A/B** — model choice, `lotusDenoiseFloor`, AGC on/off (LOTUS_TESTING §D2-1 / J2). **GTCRN (deferred):** tiny MIT 16 kHz model beating RNNoise, but no drop-in browser package — needs `onnxruntime-web` in a Web Worker behind a custom AudioWorklet ring-buffer (ORT can't run in an AudioWorklet, issue #13072); ~1-week build. Revisit only if low-power quality proves insufficient. HW-gated (FRCRN/Maxine) = desktop-Rust-only future.

### [~] P6-2 · Element Call fork — retire remaining DOM hacks (Phase 2 needs publish)

Phase 1 shipped: `io.lotus.set_deafen` (LiveKit-source deafen/screenshare-audio-mute) replaces the brittle `<audio>.muted` iframe hack; cinny sends it join-gated alongside the transitional DOM fallback. **Phase 2 (blocked on user npm publish):** publish fork `0.20.1-lotus.2` → bump cinny pin `lotus.1`→`lotus.2` → delete the `CallControl.ts` `.muted` fallback + the EC1–EC6 fixes ship. **Deferred pieces (P6-2b):** the `useCallSpeakers` DOM-scrape is a dormant fallback behind `io.lotus.call_state`; `.click()`-by-`data-testid` UI toggles are low-value fork surface. Divergence to confirm: deafen doesn't silence soundboard/`Unknown`-source audio (setVolume type limit).

### [~] Mobile audit — code-level pass DONE (device QA + deferred items open)

Comprehensive **code-level** responsive audit of the LOTUS_FEATURES surface (12 survey agents — 6 area slices + 6 deep per-feature dives — each finding verified, fixed in reviewed batches, then a 5-agent all-files regression+efficacy gate; gate-green tsc/eslint/857 tests/build). Shipped `lotus` commits `d6159997` `836e4a66` `4c298a36` `09415f95` `36fdbdd3` `154e35ef` `09f37f89` (M1–M6 + N1–N2): message-table/composer/call-bar/url-preview/explore overflow fixes; full-screen media/file/avatar viewers + touch-pan for zoomed images; full-screen scrollable member profile (+close btn); native SettingsSelect + tile-body volume sliders + measured GifPicker; full-screen Report/"Seen by" dialogs + full-width toasts + popover clamps; **image/video aspect-ratio (no crop/letterbox on phones)**; 44px room-row + space-rail touch targets. The app was found **structurally sound** on mobile (thread panel, dialogs, drawers, settings shells, ACL/widgets/search/QR/auth all already responsive).

Intentional desktop deltas (disclosed, non-regressive): volume sliders below labels; Report dialog 380→480px & "Seen by" modals 460→360px (sibling-modal normalization); translate select → folds SettingsSelect.

**NOT done — needs a real device / product decisions (open):**

- [ ] **Runtime mobile QA** — none of the above is validated on an actual phone (static analysis only). Needs device/devtools walk-through per LOTUS_TESTING §E.
- [x] **Element Call fork in-call mobile UI** — DONE (`element-call:lotus` `e36aef8a`, 3-agent survey + 2-agent review). Fixed the EC iframe's own phone UI: footer control row wraps so hangup can't clip (320–500px), portrait 1:1 self-PiP safe-area inset, 44px camera-flip + reaction-picker targets, settings-tab horizontal scroll, landscape spotlight filmstrip. All mobile-gated (EC is mobile-first CSS). Rides to users on the next fork republish (P6-2). Runtime on-device QA still pending (needs a phone).
- [ ] **M2 — touch discoverability** — message quick-reactions/actions are hover-gated; long-press is the fallback but is **unreliable on iOS Safari** (deep audit). A visible touch affordance is needed but the naive fix hides unread badges / clutters messages (member-profile-style redesign).
- [~] **Sub-44px touch-target sweep** — primary controls DONE via a shared `MobileTouchTarget` `@media` class (`P1`, `8a1168bc`): in-call bar ×7, call-status bar ×4, thread "N replies" chip, knock Approve/Deny, ACL remove. Secondary batch DONE (`r2`, `72e7447d`): image-viewer close/zoom±/zoom%/download, embed-player Close/Collapse/Fullscreen/View-post, read-receipt "seen by" pill. **Deferred (rationale, not built):** PiP fullscreen/resize handles — enlarging four 24px corners to 44px would swallow a ~160px mobile PiP and block "Return to call" (needs a design rethink, not a blunt bump); presence dot is a non-interactive status indicator (no target needed).
- [x] **Avatar-decoration `prefers-reduced-motion`** — DONE (`P2`, `c3e1fbff`): renders just the avatar (no animated APNG overlay) under the preference; no static-frame asset to freeze to.
- [x] **Twitch/Twitter/TikTok preview cards** — DONE (`r2`, `72e7447d`). These fragment cards render header/thumbnail beside content as direct children of the `UrlPreview` flex row; added `StackOnMobile` (mobile-only `@media (max-width:750px){ flex-direction:column }`) scoped to those variants via `cardClass`. folds `Box` has no default `direction` so the override wins uncontested; desktop unchanged (verified by 2 review agents). Pre-existing desktop quirk (header bar beside content on Twitter/TikTok at desktop width) left as-is — the fuller fix is wrapping each card body in a column `Box`; out of scope for a mobile pass.
- [ ] **M2 — message action/quick-reaction touch discoverability** — hover-gated + iOS-long-press-unreliable; a visible touch affordance collides with unread-badge placement / per-message clutter → needs a design decision + device look.

### [ ] Inline media embeds — remaining providers (LOW PRIORITY)

The inline embed system (`videoEmbed.ts`) covers 18 providers (16 + Mixcloud/Deezer); three more were **deliberately deferred** (verified against 2026 docs by review agents):

- **Bandcamp** (highest-value audio add) — needs an **oEmbed** round-trip: the player URL requires numeric `album`/`track` item ids that aren't in the page URL (`bandcamp.com/oembed` is the resolver; mirror the `TikTokEmbedCard` on-click oEmbed pattern). CSP `frame-src`: `bandcamp.com`. Classify `kind: 'audio'`.
- **SoundCloud `on.soundcloud.com` short links** — the `w.soundcloud` widget resolver does **not** follow the redirect; needs the same on-click oEmbed resolve (`soundcloud.com/oembed`, CORS-enabled) to get the canonical URL. (Canonical `soundcloud.com/{user}/{track}` links already work.)
- **Vimeo `event/{id}` (live events) + `ondemand/…`** — event embed host is `vimeo.com` (**not** `player.vimeo.com`, so it needs a new CSP `frame-src` host); on-demand is paywalled and doesn't embed for non-purchasers. Low ROI — only do the event case if `vimeo.com` is widened for another reason.

Also open (from the quality review): a real `onError`/error-state fallback for iframes that fail to load (deleted post / region lock / X login-wall) — cross-origin frames don't fire `onError` reliably, so this needs a load-timeout heuristic; the Close button + badge link are the current escape hatch.

**✅ Steam detailed embed (2026-07, 2-agent review) — `ef82650c`.** `store.steampowered.com` content URLs get rich cards: **app** pages → OG capsule header + click-to-play facade → Steam's official `/widget/{id}` store iframe (live region-aware price / discount % / Buy on Steam, gated by `inlineMediaEmbeds`); **news/announcement** → banner + headline + body-preview card; **bundle/sub/dlc** → OG store card. `getSteamTarget`/`steamWidgetEmbedUrl` in `videoEmbed.ts` (+tests). Grounded in prod CSP (`frame-src https:` allows the widget with no infra change; images via homeserver `mxc`; NO client-side Steam API — `connect-src` + Steam CORS both block it, which is the honest ceiling: no review scores/genres/screenshots client-side). **Needs on-device QA:** the live widget iframe height/fit (can't render headlessly) — verify the price/Buy stay visible on desktop-wide and phone.

**✅ GIF previews now animate + Mixcloud/Deezer embeds (2026-07, 2-agent review) — `4154cae5`.** Reported live: a `media.giphy.com` link "shows the gif's image but doesn't play it." Root cause: **Synapse's `/thumbnail` endpoint flattens animated GIFs to a still first frame**, and every preview image went through it. `GifCard` (Giphy/Tenor) + the generic OG card now request the **original** via `/download` (`mxcUrlToHttp` with no width/height) when the preview is a GIF (`og:image:type === 'image/gif'` or a `.gif` pathname). Guarded: `shouldServeGifOriginal()` keeps the frozen thumbnail past a **10 MB** `matrix:image:size` cap, and the generic card's eager `<img>` gained the `loading="lazy"` it was the only preview image missing. Also added **Mixcloud + Deezer** audio embeds, and fixed Deezer podcasts (they live at `/show/<id>`, **not** `/podcast/<id>` — the latter 404s on Deezer's own oEmbed; verified against the live API). **Needs on-device QA:** confirm a large GIF still animates and doesn't stall the timeline.

**✅ Embed bug hunt (2026-07, 3 survey agents + 2-agent review) — `f2673eff`.** Core posture verified **sound** (iframe sandbox, `useIframeAutoHeight` postMessage origin+source trust, no XSS/`dangerouslySetInnerHTML`, `rel="noreferrer"` on all 21 links, oEmbed no-SSRF, the whole facade→iframe/abort/observer lifecycle). Fixed: Twitch/Kick/SoundCloud/Streamable reserved-path over-match (utility pages rendered as broken players), Vimeo hash over-capture (`[0-9a-f]{6,}`), Spotify/Steam/Discord/IMDb `og:image` now via `mxcUrlToHttp` (was a broken raw `mxc://` `<img>` + a pre-click 3p-request facade bypass), `wide` class follows the og:url-resolved embed, Twitter host alignment (`mobile.twitter.com`/`/statuses/`), URL de-dupe.

**Deferred / surfaced from the hunt (not fixed — decide before doing):**

- **Security-vs-functionality tradeoff (needs a call):** drop `allow-popups-to-escape-sandbox` and/or `clipboard-write` from `EMBED_SANDBOX`/`allow=` on embed iframes — real hardening against a _compromised_ provider (phishing popup / clipboard hijack), but risks breaking a legit provider popup/copy on the trusted major providers we embed. Low marginal value; not shipped blindly.
- **Defense-in-depth:** `encodeURIComponent` the Bluesky authority + Apple Music path/search interpolated into the embed `src` (not currently exploitable — host is fixed and value comes from `URL.pathname`; React escapes the attribute).
- **Out of embed scope (real, low-sev):** `LotusDenoiseFeature` (`ClientNonUIFeatures.tsx`) has a `window` `message` listener with **no origin/source check** → any frame/window can post `{type:'lotus-denoise-status', error}` and pop a forged **"System"** toast (text only, no XSS). Validate `event.source`.
- **Lifecycle Lows (cosmetic/latent):** a re-fetch flips a playing embed back to the spinner (latent — url is keyed); auto-height retained across close→reopen; `extractEmbedHeight` generic `.height` fallback accepts any allowed-origin message; `TweetEmbed` theme is a one-time `matchMedia` snapshot (no live theme switch); host-normalization gaps (`vt.tiktok.com` misses `StackOnMobile`, `m.instagram.com`, `www.youtu.be`).

### Deferred / dropped (decided — kept for context)

- **[DEFERRED] P5-51** Federated "Identity Contexts" (session isolation) — multi-sprint, touches auth/crypto/storage core; smaller intermediate step = plain multi-account switch. **[DROPPED] P5-52** per-room sync governor — js-sdk can't truly per-room filter `/sync`; only a cosmetic hide. **[DEFERRED] P5-53** local scripting plugin — prefer a declarative automation-rules feature (no arbitrary code). **[DEFERRED] Audit-3** profile banner — MSC4427 open/unmerged; revisit on merge. **[WON'T FIX] P5-50** Windows HW media pipeline (WebRTC decode lives in WebView2; not injectable). **[MOVED] P5-9** LFG → LotusBot `!lfg`.

---

## 🚫 Blocked Features (server / upstream gated)

Re-run `/_matrix/client/versions` + `unstable_features` after each Synapse upgrade. **Re-checked on 1.157.1 (2026-07-23): no change — all four below are still `false`.** The 1.156.0→1.157.1 delta unblocked nothing (it's a bugfix release; the only feature-bearing release in the gap was 1.156.0, which we were already running).

- **[BLOCKED] Live Location Sharing** (MSC3489 + MSC3672 both `false`) — real-time GPS beacons over the existing static share.
- **[BLOCKED] Reaction/Relation Redaction** (MSC3892 `false`) — remove a reaction without redacting the parent; current full-redaction fallback is acceptable.
- **[DONE 2026-07] Room Preview before joining** (MSC3266) — the client was always built (`JoinBeforeNavigate` → `RoomCard` via `mx.getRoomSummary`). The earlier "blocked" flag was a **misdiagnosis**: it tested `/v1/rooms/{id}/summary` (404), but the SDK calls the _unstable_ `im.nheko.summary/summary/{id}` path, which returns **200** with name/topic/members/join_rule. Verified live after the 1.156 upgrade; also added a join-rule/encryption chip + Request-to-join for knock rooms to the preview card.
- **[BLOCKED] Thread Subscriptions** (MSC4306 `false`) — "Follow thread" button (depends on the shipped Thread Panel).

---

## 📖 Reference

### Server Capabilities (as of 2026-07)

- **Homeserver** `matrix.lotusguild.org` · **Synapse** `1.157.1+trixie1` (upgraded 2026-07-23 from **1.156.0** — note the host was found on 1.156.0 while the docs claimed 1.155.0, so **always verify with `dpkg-query -W matrix-synapse-py3`**, don't trust the docs; apt package on Debian 13, LXC 151) · **Matrix spec** up to `v1.12` (Synapse still advertises v1.12; MSC features via `unstable_features`).
- **MSC ON** (re-dumped live from `/_matrix/client/versions` on 1.157.1): `msc4140` · `msc3771` · `msc3440.stable` · `msc4133.stable` · `simplified_msc3575` · `msc4222` · `msc3266` (room summary live at unstable `im.nheko.summary/summary/{id}` — 200; the `/v1/rooms/{id}/summary` path is still 404) · `msc3401_matrix_rtc` · `msc2285.stable` · `msc3827.stable` · `msc3981` · `msc4380.stable` · `msc4445` · `msc2659.stable` · `msc2666` · `msc2432` · `e2e_cross_signing` · `label_based_filtering`. **OFF/blocked:** `msc4306` · `msc3882` · `msc3912` · `msc4155` · `msc3489`/`msc3672` · `msc3892` · `msc4028` · `msc4069` · `msc4108` · `msc3391` · `msc4354` (sticky events — **deliberately off**, see the Matrix 2.0 section above) · `msc4143` (RTC foci — **not a gap**: LiveKit is discovered via `.well-known` `org.matrix.msc4143.rtc_foci`, confirmed live, not this flag).
- **Dead client code:** Synapse 1.157.0 **removed** `msc3861` (MAS auth delegation) entirely — the ~6 `msc3861`/`msc2965` references in `src/` can never activate against this homeserver (we auth via Authelia `oidc_providers`). Harmless, but cleanup material.
- **Live endpoints:** Report User (MSC4260) **200** ✅ · Report Room (MSC4151) ✅.
- **Homeserver access (audits):** Synapse = LXC 151 (`pct exec 151 -- bash`), config `/etc/matrix-synapse/homeserver.yaml`. Web deploy = LXC 106. Voice guard = `voice-limit-guard.py` on LXC 151.
- **SDK notes:** no arbitrary profile-field methods (use `mx.http.authedRequest()` for MSC4133); js-sdk can't per-room filter `/sync`; sanitizer strips `<math>`/MathML; SW exists at `src/sw.ts`; `getMatrixToRoom()` builds invite URLs; EC audio-inject unblocked via the fork's `io.lotus.inject_audio`.

### Key File Reference

| What                           | File                                                                | Lines               |
| ------------------------------ | ------------------------------------------------------------------- | ------------------- |
| Global keydown / room nav      | `hooks/useKeyDown.ts` · `hooks/useRoomNavigate.ts`                  | whole / 19-72       |
| Room unread counts atom        | `state/room/roomToUnread.ts`                                        | `roomToUnreadAtom`  |
| Overlay portal provider        | `pages/App.tsx` · `index.html`                                      | 65 / 101            |
| Room settings tabs             | `features/room-settings/RoomSettings.tsx`                           | 27-56               |
| State event read/write pattern | `features/common-settings/general/RoomEncryption.tsx`               | 42-52               |
| Power levels                   | `hooks/usePowerLevels.ts`                                           | whole               |
| Slash commands                 | `hooks/useCommands.ts`                                              | 140-537             |
| Chat background picker/defs    | `features/settings/general/General.tsx` · `lotus/chatBackground.ts` | 945-981 / whole     |
| Matrix.to URL builder          | `plugins/matrix-to.ts`                                              | `getMatrixToRoom()` |
| Media URL conversion           | `utils/matrix.ts`                                                   | `mxcUrlToHttp()`    |
| Search pagination / virtual    | `features/message-search/{useMessageSearch,MessageSearch}.tsx`      | 74-121 / 234-365    |
| Call mic control               | `plugins/call/CallControl.ts`                                       | 206-212             |
| Knock support check            | `utils/matrix.ts`                                                   | 376-391             |
| Notification mute push rules   | `hooks/useRoomsNotificationPreferences.ts`                          | 110-150             |

### Element Call fork — operational reference

Fork = `LotusGuild/element-call` (branch `lotus`, from upstream tag `v0.20.1`); cinny consumes the npm package `@lotusguild/element-call-embedded` (built bundle copied into `public/element-call/`).

**Publish a new version (manual; needs the Gitea npm token):** bump `embedded/web/package.json` (current unpublished `0.20.1-lotus.2`) → `pnpm run build:embedded` (Node 24, pnpm 10.33) → `cd embedded/web && npm version <tag> --no-git-tag-version && npm publish` (Gitea registry) → in cinny bump the `@lotusguild/element-call-embedded` pin (currently `0.20.1-lotus.1`) → `npm install` → build.

**`io.lotus.*` widget actions** (add new toWidget actions to the enum + `LOTUS_TO_WIDGET_ACTIONS` in `src/lotus/lotusActions.ts`; only send AFTER call-join or a 10s timeout fires):

| Action                       | Dir     | Purpose                                                | Module                |
| :--------------------------- | :------ | :----------------------------------------------------- | :-------------------- |
| `io.lotus.call_state`        | EC→host | speaker/mute/camera stream (`lotusCallState=1`)        | `lotusCallState.ts`   |
| `io.lotus.focus_participant` | host→EC | spotlight (works during screenshare)                   | `lotusFocus.ts`       |
| `io.lotus.inject_audio`      | host→EC | soundboard clip mixed into call (`lotusAudioInject=1`) | `lotusAudioInject.ts` |
| `io.lotus.set_quality`       | host→EC | audio/screenshare bitrate/fps caps                     | `lotusQuality.ts`     |
| `io.lotus.decorations`       | host→EC | in-call avatar decorations                             | `lotusDecorations.ts` |
| `io.lotus.set_deafen`        | host→EC | LiveKit-source deafen (P6-2)                           | `lotusDeafen.ts`      |

Also flag-gated: `lotusTransparent`/`lotusTheme`, `lotusDenoiseSource=1` (in-source ML denoise).

### CI/CD + per-feature checklist

```
edit → commit → git push origin lotus
→ Gitea Actions (.gitea/workflows/ci.yml): npm ci → build + npm test + tsc + eslint + prettier (ALL hard gates) → audit + bundle-size (informational)
→ lotus_deploy.sh on LXC 106 polls the "Build & Quality Checks" status → npm ci && npm run build → rsync → live (~11 min)
```

Before marking a feature complete: `npx tsc --noEmit` (0 errors) · `npx eslint src/` (0 new) · `npx prettier --check src/` · `npm test` (Node runner via tsx, hard CI gate — colocated `*.test.ts`) · update `README.md`/`landing/index.html` for Lotus-custom features · visually verify on `chat.lotusguild.org`.

**CI hardening (2026-07, reviewed):**

- [x] **Concurrency** — `cancel-in-progress` on cinny `ci.yml` and cinny-desktop `release.yml` (`386a2979` / `c5461ce`): a superseded lotus push cancels its in-flight web CI and collapses queued ~30-min Tauri desktop builds to just the newest. Safe for deploys because `lotus_deploy.sh` now **follows origin/lotus HEAD** each poll iteration + resets to the gated SHA (`matrix` `c15a489`) — closes the latched-SHA freeze race.
- [x] **Hard quality gates** — typecheck/eslint/prettier promoted from `continue-on-error` to blocking (tree held clean). eslint gates on errors only; `no-explicit-any` warnings stay informational.

**CI follow-ups (open):**

- [ ] **Dedicated `desktop-linux` runner** (infra) — concurrency only collapses _burst_ stacking; a single in-flight `build-linux` (Tauri, `ubuntu-latest`) still shares the runner with web CI and can queue a web CI/deploy up to ~30 min. Fix = register a 2nd Linux act_runner labelled `desktop-linux` (root, network, RAM for a Tauri build; do NOT also label it `ubuntu-latest`) and point only `build-linux: runs-on` at it. Relabeling without a matching runner hangs the job forever.
- [ ] **Debounce the desktop trigger** — `trigger-desktop` fires a full desktop build on _every_ lotus commit; consider tag/`workflow_dispatch`/schedule-gating to decouple desktop cadence from web commits (biggest remaining runner-load source).
- [ ] **Verify Gitea ≥ 1.24** actually honors workflow `concurrency` (older silently ignores it → safe no-op, but the change is then inert — confirm on a test burst).
- [ ] **Deferred (chosen-not-now):** build-once/deploy-the-artifact (kill the CI-then-deploy double build); CI-gate the `lotus-build.sh` upstream-merge path (currently builds+deploys+then pushes, bypassing CI).