docs: mark all P1 features complete in TODO; update README and landing page

LOTUS_TODO.md:
- P1-1: marked UPSTREAM REMOVED (Ctrl+K already exists as full room switcher)
- P1-2 through P1-11: all marked [x] with implementation notes

README.md:
- New sections: UX & Composer, Settings (Appearance), Calls (Extended)
- Documents: media gallery, sidebar filter, DM previews, favorites, poll
  creation, voice speed, invite QR, private receipts, knock-to-join,
  syntax highlighting, night light, push-to-deafen, typing dots, char counter
- Key Custom Files table updated with 4 new entries

landing/index.html (matrix repo):
- Polls row: "display & vote" → "create, vote & display"
- Voice messages: add speed control note
- 4 new UX table rows: Media Gallery, Sidebar filter, Favorite rooms, Invite link+QR
- also-available paragraph updated with all P1 additions
- Comparison date updated

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -135,6 +135,29 @@ Emoji reaction buttons styled for terminal mode via `button[data-reaction-key]`
 - **Presence badges on members**: Online/busy/away dots shown next to users in the room members drawer and settings members panel (`PresenceBadge` component from `src/app/components/presence/Presence.tsx`).
 - **Document title unread count**: Tab title updates to `(N) Lotus Chat` for mentions, `· Lotus Chat` for unreads, `Lotus Chat` when clear.
 
+### UX & Composer
+
+- **Message length counter**: A muted character counter appears just left of the send button while typing, disappearing when the composer is empty. Resets on room switch.
+- **Sidebar room filter**: A search-icon input at the top of the Home and DMs sidebar tabs filters rooms by display name in real time. Clears on tab switch. Styled to match the members-drawer search bar (`size="400"`, search prefix icon).
+- **DM last message preview**: Each DM row in the sidebar shows a truncated message body (48 chars) and relative timestamp (`Xm`, `Xhr`, `Yesterday`, `D MMM`) below the room name, sourced reactively from `useRoomLatestRenderedEvent`. Encrypted rooms show "Encrypted message" only on actual decryption failure.
+- **Favorite rooms**: Right-click any room → "Add to Favorites" / "Remove from Favorites". Favorited rooms (using the standard Matrix `m.favourite` tag) appear in a collapsible "Favorites" section above the main room list on the Home tab. Syncs across devices via account data.
+- **Poll creation**: Polls can be created directly from the composer — `Icons.OrderList` button opens a modal with question field, 2–10 answer options (add/remove), and Single/Multiple choice toggle. Sends a stable `m.poll.start` event. (Poll display & voting were already supported.)
+- **Voice message playback speed**: `0.75×` → `1×` → `1.5×` → `2×` speed toggle pill on voice message player — cycles on click via `playbackRate` on the `<audio>` element.
+- **Invite link + QR code**: Room settings → General shows a "Share Room" tile with the `matrix.to` invite URL and a QR code. The Invite modal also has a `⊞` toggle button showing a QR panel when clicked. Both use `api.qrserver.com` (added to CSP on LXC 106).
+- **Private read receipts**: Settings → General → Privacy — "Private Read Receipts" toggle. When on, sends `m.read.private` instead of `m.read` so other room members can't see when you've read messages.
+- **Media gallery**: A right-side drawer (photo icon in room header, Desktop only) showing Images | Videos | Files tabs. Reads already-decrypted timeline events — works in E2EE rooms. Encrypted-blob images show a lock-icon placeholder. Load More paginates backwards via `mx.paginateEventTimeline()`.
+- **Knock-to-join**: When a room's join rule is `knock`, RoomIntro shows "Request to Join" (calls `mx.knockRoom()`) with "Request sent" pending state. Room admins see a "Pending Requests" section in the members drawer with Approve / Deny buttons.
+- **Code syntax highlighting** (TDS mode): Fenced code blocks in messages highlight keywords (cyan), strings (green), numbers (orange), comments (italic dim), function names (purple) using inline `--lt-accent-*` CSS variables. Custom tokenizer in `syntaxHighlight.ts` — supports JS/TS/JSX/TSX, Python, Rust. Falls back to ReactPrism for other languages.
+
+### Settings (Appearance)
+
+- **Night Light / Blue Light Filter**: Warm orange overlay (`rgba(255,140,0,N%)`) across the entire UI. Toggle + intensity slider (5–80%) in Settings → Appearance. `position:fixed; pointer-events:none; z-index:9998`. Persists across sessions.
+
+### Calls (Extended)
+
+- **Push-to-Deafen**: Press `M` during a call to toggle speaker mute (deafen). Configurable in Settings → General → Calls alongside the PTT key. Skips editable elements; guards `e.repeat`; uses `el.ownerDocument.body` for iframe safety.
+- **TDS typing indicator dots**: When Lotus Terminal mode is active, the animated typing indicator dots turn TDS orange (`var(--lt-accent-orange)`) via `color: currentColor` inheritance.
+
 ### Server Integration
 
 - **Server support contact (MSC1929)**: Settings → Help & About displays the homeserver admin contact fetched from `/.well-known/matrix/support`. Shows the admin's Matrix ID and a link to the support page when the homeserver has configured this endpoint. Degrades gracefully when not configured (section is hidden on 404 or network error). In TDS mode the contact text and link render in `--lt-accent-cyan`. Implemented in `src/app/features/settings/about/About.tsx`.
@@ -206,3 +229,7 @@ Built files are served from `/var/www/html/` on LXC 106 (nginx). Config lives at
 | `src/app/components/CallEmbedProvider.tsx` | PiP + draggable call embed, call wallpaper carry-over |
 | `src/app/plugins/call/CallEmbed.ts` | EC widget bridge: iframe setup, `color-scheme` dark/light injection, built-in control hiding, theme sync |
 | `src/app/plugins/millify.ts` | Named import fix for Rolldown CJS interop (prevents `zc.default is not a function` crash) |
+| `src/app/features/room/MediaGallery.tsx` | Right-side media gallery drawer (images/videos/files) |
+| `src/app/features/room/PollCreator.tsx` | Poll creation modal (single/multiple choice, 2–10 options) |
+| `src/app/features/common-settings/general/RoomShareInvite.tsx` | Invite link + QR code tile for room settings |
+| `src/app/utils/syntaxHighlight.ts` | TDS code syntax tokenizer (JS/TS/Python/Rust → inline CSS vars) |