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feat(FN-4179): optimistically clear room composer on send

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Implements optimistic room composer clear in the ChatView, providing instant UI feedback when switching rooms without waiting for server confirmation, with accompanying tests and documentation updates.

Fusion-Task-Id: FN-4179

Fusion-Task-Lineage: 0c3588fa-81ca-464b-b001-506c1756d0ea
This commit is contained in:
Fusion
2026-05-12 14:15:25 -07:00
committed by gsxdsm
parent f397e71132
commit 056b1a9d6a
7 changed files with 64 additions and 14 deletions
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docs/architecture.md
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@@ -290,7 +290,7 @@ Intentional exclusions from shared snapshots:
- Room responder prompt context is compacted deterministically: the newest 12 room messages stay verbatim, while older fetched history is summarized into a structured header (span, participants, and ranked highlights) before prompt size caps are enforced.
- Room-reply generation is now non-silent on failure: if a room has members but no active responders can be resolved, or all responder generations fail/return empty output, `sendRoomMessage(...)` throws `RoomReplyGenerationError` and the route surfaces HTTP 502 instead of returning a silent user-only success.
- `useChatRooms.sendRoomMessage()` now follows direct-chat style optimistic UX: append a temporary local user room message before `POST /api/chat/rooms/:id/messages`, reconcile that temp entry to the persisted user message on success, then refresh authoritative transcript state while continuing `chat:room:message:*` live SSE updates.
- On failures, `useChatRooms.sendRoomMessage()` performs state reconciliation (rollback temp entry or replace with persisted transcript when POST partially succeeded) and rethrows; `ChatView` owns the single user-facing toast and keeps composer text for retry.
- On failures, `useChatRooms.sendRoomMessage()` performs state reconciliation (rollback temp entry or replace with persisted transcript when POST partially succeeded) and rethrows; `ChatView` clears the composer immediately when dispatching a room send, restores the exact prior text only if the send rejects, and owns the single user-facing error toast.
- Mention UI in rooms keeps direct-chat behavior unchanged while adding room affordances:
- `AgentMentionPopup` receives room membership context and shows members first with a `status-dot` member indicator (`aria-label="Room member"`).
- With an empty mention filter in room mode, only room members are listed; a hint row prompts the user to type to search non-members.