Backend:
- Add MENTION_TAG_RE matching new `<mention type="..." id="...">label</mention>` format
- Extend extract_mentions() and resolve_mentions() to parse new format (legacy backward-compatible)
Frontend:
- New src/lib/mention-ast.ts: AST types (TextNode, MentionNode, AiActionNode),
parse() and serialize() functions for AST↔HTML conversion
- MentionPopover: load @repository: from project repos, @ai: from room_ai configs
(not room members); output new HTML format with ID instead of label
- MessageMentions: use AST parse() for rendering (falls back to legacy parser)
- ChatInputArea: insertMention now produces `<mention type="user" id="...">label</mention>`
- RoomParticipantsPanel: onMention passes member UUID to insertMention
- RoomContext: add projectRepos and roomAiConfigs for mention data sources
- Fix ReactionGroup.count: i64 -> i32 and users: Vec<Uuid> -> Vec<String>
to match frontend ReactionItem (count: number, users: string[]).
Mismatched types caused the WS reaction update to silently fail.
Also update ReactionItem in api/ws_types.rs to match.
- Add activeRoomIdRef guard in onRoomReactionUpdated to prevent stale
room state from processing outdated events after room switch.
- Switch from prev.map() to targeted findIndex+spread in onRoomReactionUpdated
to avoid unnecessary array recreation.
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
- reaction.rs: query before insert to detect new vs duplicate reactions,
only publish Redis event when a reaction was actually added
- room.rs: delete Redis seq key on room deletion to prevent seq
collision on re-creation
- message.rs: use Redis-atomic next_room_message_seq_internal for
concurrent safety; look up sender display name once for both
mention notifications and response body; add warn log when
should_ai_respond fails instead of silent unwrap_or(false)
- ws_universal.rs: re-check room access permission when re-subscribing
dead streams after error to prevent revoked permissions being bypassed
- RoomChatPanel.tsx: truncate reply preview content to 80 chars
- RoomMessageList.tsx: remove redundant inline style on message row div
Backend:
- Atomic seq assignment via Redis Lua script: INCR + GET run atomically
inside a Lua script, preventing duplicate seqs under concurrent requests.
DB reconciliation only triggers on cross-server handoff (rare path).
- Broadcast channel capacity: 10,000 → 100,000 to prevent message drops
under high-throughput rooms.
Frontend:
- Optimistic sendMessage: adds message to UI immediately (marked
isOptimistic=true) so user sees it instantly. Replaces with
server-confirmed message on success, marks as isOptimisticError on
failure. Fire-and-forget to IndexedDB for persistence.
- Seq-based dedup in onRoomMessage: replaces optimistic message by
matching seq, preventing duplicates when WS arrives before REST confirm.
- Reconnect jitter: replaced deterministic backoff with full jitter
(random within backoff window), preventing thundering herd on server
restart.
- Visual WS status dot in room header: green=connected, amber
(pulsing)=connecting, red=error/disconnected.
- isPending check extended to cover both old 'temp-' prefix and new
isOptimistic flag, showing 'Sending...' / 'Failed' badges.
The frontend WebSocket client sends room_public, but the HTTP fallback
sends it as a JSON body parsed directly into RoomCreateRequest/RoomUpdateRequest
which expects public. Add #[serde(rename = "room_public")] so both
ws params and HTTP JSON body work consistently.
