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* fix(chat): correct unread — archived sessions + mount-race auto-read (MUL-4360) Reland of #5315, which was reverted by #5332 as collateral in an unrelated release-wide revert (to unwind 162/163 migration BLOCK from other PRs), not for any defect in this code — Howard/Preflight assessed these changes WARN / non-blocking. Restores all three fixes verbatim off current main: - backend: ListAllChatSessionsByCreator derives unread_count=0 / has_unread=false for status='archived' rows via a CASE gate. last_read_at is untouched, so unarchiving restores the true unread state. Single source of truth for every unread surface (quick-chat FAB, sidebar Chat tab, chat-window header, mobile); installed desktop clients benefit with no app update. - frontend: the archive mutation onMutate optimistically zeroes the row's unread so no badge counts a just-archived session in the frame before the refetch lands. Unarchive does not fabricate a count — the true state returns from the server refetch. - frontend: auto-mark-read is deferred a tick and cancelled on cleanup, so a session that is only momentarily active on mount (persisted activeSessionId restored for one frame, then cleared by the URL->store effect) is not marked read; only a session that stays active past the tick is. Verification: sqlc regenerate produces no drift; go test ./internal/handler -run 'TestListChatSessions_ArchivedSessionReportsZeroUnread|TestSetChatSessionArchived_ClearsChannelBinding' passes against a real Postgres; vitest mutations.test.tsx (3) and use-chat-controller.test.tsx (8) pass; core + views typecheck clean. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Co-authored-by: multica-agent <github@multica.ai> * fix(chat): converge archived unread on chat:session_updated realtime event (MUL-4360) Howard's #5333 review found a real cross-tab gap: the chat:session_updated handler patched status but never unread, and chatSessionsOptions is staleTime: Infinity, so a session archived in one tab kept its unread badge lit in another tab/device forever — the same stuck-badge bug, one surface over. Extract the inline handler into applyChatSessionUpdatedToCache and force unread_count=0 / has_unread=false when payload.status === "archived", mirroring the archive mutation's optimistic patch and the backend deriving unread=0 for archived rows. Unarchive does NOT fabricate a count — the true unread returns from the server refetch (last_read_at untouched). No sessions-list invalidation; minimal field patch as reviewed. Adds use-realtime-sync.test.ts coverage: an archived event zeroes a cached unread row; an active event does not resurrect unread; a rename-only event leaves unread untouched. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Co-authored-by: multica-agent <github@multica.ai> --------- Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com> Co-authored-by: multica-agent <github@multica.ai>
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