Add room open performance diagnostics and warm cache hydration for room switches (FN-5388). The implementation adds a timing instrumentation utility, SWR cache constants, warm-room handoff logic in `useChatRooms`, and a documentation file covering the performance model, accompanied by regression tes
Fusion-Task-Id: FN-5388
FN-5389 adds dashboard resume event instrumentation: a `resumeInstrumentation` utility captures SSE resume signals, wired through `useChat`, `useChatRooms`, and `useTasks` hooks, with remount markers in `Board` and `ChatView`; diagnostics routes expose resume events for observability, documented in
Fusion-Task-Id: FN-5389
Implements selective room composer restoration — the dashboard now classifies room send failures and gates composer restoration by error type, preventing spurious recovery on transient delivery errors while preserving composer state only for actionable failures. Covers the new classification logic i
Fusion-Task-Id: FN-5360
The merge implements optimistic room send with failure recovery in the ChatView and useChatRooms hook, including a reconciliation flow that handles send failures gracefully and documents the UX behavior. The dashboard guide and architecture docs are updated to reflect the new room messaging pattern.
Fusion-Task-Id: FN-4040
Fixes a room reply visibility gap in the chat rooms hook by correcting the message-resync condition and adding test coverage to reproduce the issue, with updated documentation for the resync contract.
Fusion-Task-Id: FN-3981
- Add useChatRooms hook with room lifecycle state and API integration
- Wire ChatView UI for room selection/creation and update room-focused tests
- Tokenize ChatView and TaskCard color usage to align with dashboard design tokens
- Update architecture docs and include FN-3879 changesets for published CLI package
Fusion-Task-Id: FN-3879
