Backend:
- Add reaction_batch handler: GET /api/rooms/{room_id}/messages/reactions/batch?message_ids=...
- Register route in libs/api/room/mod.rs
- Backend already had message_reactions_batch service method, just needed HTTP exposure
Frontend:
- Add ReactionListData import to room-context.tsx
- Fix thisLoadReactions client type (was using broken NonNullable<ReturnType<>>)
- Remove unused oldRoomId variable
- Delete unused useRoomWs.ts hook (RoomWsClient has no on/off methods)
- Remove unused EmojiPicker function and old manual overlay picker from RoomMessageBubble
- Remove unused savedToken variable in room-ws-client
- Fix initial room load being skipped: `setup()` called `loadMoreRef.current`
which was null on first mount (ref assigned in later effect). Call `loadMore`
directly so the initial fetch always fires. WS message.list used when
connected, HTTP fallback otherwise.
- Rewrite useRoomWs to use shared RoomWsClient instead of creating its own
raw WebSocket, eliminating duplicate WS connection per room.
- Remove dead loadMoreRef now that setup calls loadMore directly.
Frontend:
- P0: Replace constant estimateSize(40px) with content-based estimation
using line count and reply presence for accurate virtual list scroll
- P1: Replace Shadow DOM custom elements with styled spans for @mentions,
eliminating expensive attachShadow calls per mention instance
- P1: Remove per-message ResizeObserver (one per bubble), replace with
static inline toolbar layout to avoid observer overhead
- P2: Fix WS token re-fetch on every room switch by preserving token
across navigation and not clearing activeRoomIdRef on cleanup
Backend:
- P1: Fix reaction check+insert race condition by moving into transaction
instead of separate query + on-conflict insert
- P2: Fix N+1 queries in get_mention_notifications with batch fetch
for users and rooms using IN clauses
- P2: Update room_last_activity in broadcast_stream_chunk to prevent
idle room cleanup during active AI streaming
- P3: Use enum comparison instead of to_string() in room_member_leave
- Add `check_room_access` before `manager.subscribe()` in ws_universal
to prevent unauthorized room subscription (security fix)
- Fix busy-wait in `poll_push_streams`: sleep 50ms when streams are
empty, yield only when there are active streams
- Re-subscribe dead rooms after stream errors so events are not
permanently lost until manual reconnect
- Fix streaming message placeholder using fake content as room_id:
use chunk.room_id from backend instead
- Show toast error on history load failures instead of silent fallback
