docs: mark P3-5, P3-9, P5-19, P5-23, P5-26 complete in TODO and README

Inline GIF preview, policy list viewer, collapsible long messages,
message send animation, and right-click room context menu improvements
documented and checked off.

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

README.md

@@ -70,11 +70,13 @@ A full custom theme engine layered on top of Cinny's vanilla-extract theming:
 ### Moderation
 
 - **Report Room**: A "Report Room" option in the room header menu (⋮) allows users to report a room to homeserver admins with a reason and abuse category (Spam / Harassment / Inappropriate Content / Other). Calls `POST /_matrix/client/v3/rooms/{roomId}/report` (MSC4151, confirmed supported on matrix.lotusguild.org). Implemented in `ReportRoomModal.tsx` with loading/success/error states.
+- **Policy List / Ban List Viewer (MSC2313)**: A "Policy Lists" tab in Room / Space Settings (admin-only, power-level gated) shows all subscribed `m.policy.rule.*` rooms and their contents — banned users, banned rooms, and banned servers — each with entity, reason, and recommendation fields. Subscribe (join the policy room) and Unsubscribe (leave) actions are provided. Enforcement remains solely with the Draupnir bot; this UI is a read-only complement.
 
 ### Messaging Enhancements
 
 - **Rich room topics**: Room topics that contain formatted text (bold, links, italic) are now rendered with full HTML formatting. Falls back to plain text if no `formatted_body` is present. Activates when any room admin sets a formatted topic.
 - **Edit history viewer**: Clicking the "edited" label on any edited message opens a modal showing every prior version with timestamps. Fetches all `m.replace` relations for the event and displays them oldest-to-newest. Previously the "edited" label was visible but unclickable.
+- **Inline GIF preview**: Giphy and Tenor share links sent as plain text auto-embed as animated GIFs inline in the timeline. URL patterns are detected client-side; the image is fetched via the homeserver's `/_matrix/media/v3/preview_url` proxy (no direct contact with Giphy/Tenor from the client). Rendered as `<img loading="lazy">` — respects the existing URL preview enabled/disabled setting.
 - **GIF picker**: Giphy-powered GIF search and send. Button appears in the message composer only when `gifApiKey` is set in `config.json`. Sends GIF as `m.image` — fetches blob, uploads via `mx.uploadContent`, sends with `mx.sendMessage`. `FocusTrap` handles click-outside / Escape to close. When TDS is active: dark navy background (`#060c14`), orange dim border, `// GIF_SEARCH` header, CSS overrides for Giphy SDK search bar (dark bg, orange border/focus ring, JetBrains Mono), custom orange scrollbar. All TDS styles live in `lotus-terminal.css.ts` — no runtime `<style>` injection, eliminating flash of unstyled content.
 - **Message forwarding**: Forward any message to any room from the message context menu.
 - **Draft persistence**: Unsent message drafts survive page reload via `localStorage` (`draft-msg-<roomId>`). Jotai in-memory atom is primary; localStorage is used as fallback on reload and cleared on send.
@@ -148,6 +150,9 @@ Emoji reaction buttons styled for terminal mode via `button[data-reaction-key]`
 ### 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.
+- **Collapsible long messages**: Messages exceeding ~20 lines are auto-collapsed with a "Read more ↓" button. Click to expand inline; a "Collapse ↑" button re-folds. Threshold (in lines) configurable in Settings → Appearance. Uses CSS `max-height` + `overflow: hidden` — works correctly with code blocks and embedded media. Respects `prefers-reduced-motion`.
+- **Message send animation**: Own sent messages fade and scale into the timeline (0.15 s ease-out: `scale(0.97)→scale(1)`, `opacity 0.4→1`). Incoming messages are unaffected. Respects `prefers-reduced-motion`.
+- **Right-click room context menu**: Expanded sidebar room context menu — **Mute** now opens a duration submenu (15 min / 1 hr / 8 hr / 24 hr / Indefinite) with auto-restore after the selected window; **Copy Room Link** copies the `matrix.to` URL with a "Copied!" flash; **Mark as Read** marks the room read to the latest event; plus Leave Room and Room Settings shortcuts.
 - **Unverified device warning**: `warnOnUnverifiedDevices` setting (default off). When enabled via Settings → General → Privacy, a warning banner appears above the composer in encrypted rooms that contain unverified devices, showing the count. Sending is never blocked — the banner is informational only. Uses the existing `useUnverifiedDeviceCount()` hook.
 - **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.