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* feat(chat): Chat V2 — first-class IM-style Chat tab (MUL-4171) Replace the floating chat FAB/window with a first-class Chat tab under Inbox, laid out as an IM-style two-pane surface (thread list + conversation). Highlights: - New Chat page (packages/views/chat/chat-page.tsx) with URL-addressable session selection; web + desktop routing wired up. Removes the old chat-fab / chat-window / resize-handles / context-items paths. - IM thread list: agent avatar + last-message preview + IM timestamp, red unread *count* badge (read-cursor model), presence-gated typing vs waiting. Rename lives only in the conversation header ⋯ menu (not the list hover). - Per-session conversation header (rename / view agent / delete), agent-aware empty state (avatar + name + description + starter prompts), and a deterministic clean-title derivation from the first message. - Server: read-cursor unread model (migration 145) and per-user pinned agents (migration 146, dedicated chat_pinned_agent table + handler/queries). New-agent welcome chat auto-enqueues a real agent run (LLM intro, no static template). - Design: fade the global --border token; borderless list headers on Chat/Inbox, kept (faded) on the conversation header. Verified: pnpm typecheck (all packages), go build ./..., go vet, gofmt. Co-authored-by: multica-agent <github@multica.ai> * feat(chat): make new-agent welcome read as an agent-initiated intro (MUL-4230) The "meet your new agent" chat used to insert a fake user message ("👋 Hi! Please introduce yourself …") and have the agent reply to it, so the thread looked like the creator prompting the agent. Drop the persisted user message. Flag the auto-created session is_agent_intro (migration 147) and drive the intro run server-side: the daemon builds a proactive self-introduction prompt for such sessions (buildChatPrompt) instead of a "reply to their message" prompt. The intro stays LLM-generated; the thread now opens with the agent's own message, as if it reached out first. - migration 147: chat_session.is_agent_intro - CreateChatSession carries the flag; sendAgentWelcomeChat no longer persists/publishes a user message - daemon: ChatIntro threaded from session flag → intro prompt Co-authored-by: multica-agent <github@multica.ai> * feat(chat): Settings toggle for the floating chat window (MUL-4235) (#5080) * feat(chat): Settings toggle for the floating chat window (MUL-4235) Re-introduce the floating chat overlay on top of Chat V2 as an optional, Settings-gated surface instead of deleting it outright. - Settings → Preferences → Chat: a switch (floatingChatEnabled, persisted client preference, default ON) to show/hide the floating window. - FloatingChat wrapper owns the two gates: the preference, and the /chat route (hidden on the tab so the same activeSessionId isn't shown twice). - ChatFab + a compact ChatWindow that reuse the shared useChatController and conversation components, so activeSessionId stays in lockstep with the tab. - Restore use-chat-context-items so the overlay's @ surfaces the current issue/project (the 'current context' affordance) — the tab stays manual. - i18n (en/zh-Hans/ja/ko), store unit tests. typecheck: core/views/web/desktop green. tests: chat store 9, settings 82, chat 39 pass. Co-authored-by: multica-agent <github@multica.ai> * feat(chat): dedicated Chat settings tab, floating window opt-in (MUL-4235) Address review: give Chat its own Settings tab instead of a section inside Preferences, and default the floating window OFF (opt-in). - New Settings → Chat tab (chat-tab.tsx) under My Account; moves the floating-window toggle out of the Preferences tab. - floatingChatEnabled now defaults OFF — only an explicit enable from the Chat tab mounts the FAB/overlay. - i18n: page.tabs.chat + a top-level chat block (en/zh-Hans/ja/ko); revert the Preferences chat section and its test mock; store tests updated for the opt-in default. Co-authored-by: multica-agent <github@multica.ai> --------- Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai> * refactor(chat): drop starter prompts from chat empty state (MUL-4237) (#5081) The three starter prompts (List my open tasks by priority / Summarize what I did today / Plan what to work on next) read as filler more than help, so remove them along with the now-unused returning_subtitle ("Try asking"). The empty state keeps its agent-aware header — avatar + "Chat with {name}" + optional description — and the composer stays the entry point. Locale keys dropped across en/zh-Hans/ja/ko (parity preserved). Based on the Chat V2 branch (parent MUL-4171, #5076), not main. Co-authored-by: Lambda <lambda@multica.ai> * feat(chat): pin a chat to the top of the Chat list (MUL-4240) (#5082) Builds on Chat V2 (#5076). Adds a per-conversation pin so a user can keep important chats at the top of the IM-style thread list, above the activity-sorted rest. Backend: - migration 148: chat_session.pinned_at (nullable) + partial index; the timestamp doubles as the pinned-group sort key and the boolean flag. - list queries order pinned-first, then by most-recent activity. - SetChatSessionPinned query + PATCH /api/chat/sessions/{id}/pin handler; pinning never bumps updated_at, so an unpinned chat won't jump the list. - ChatSessionResponse.pinned + chat:session_updated carries the new state. Frontend: - ChatSession.pinned; setChatSessionPinned API + useSetChatSessionPinned with optimistic re-sort; shared sortChatSessions comparator. - thread list: pin indicator on pinned rows + pin/unpin hover action; list sorted pinned-first so it stays ordered after cache patches. - realtime patch re-sorts on pin change; en/ja/ko/zh-Hans strings. Tests: SetChatSessionPinned handler test, sortChatSessions unit tests. * feat(chat): round send button, move file upload into a + menu (MUL-4250) (#5088) Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai> * fix(inbox): match chat list selected-item style (inset padding + rounded) (#5093) Wrap the inbox list in p-1 and give each row rounded-md/px-3 so the selected bg-accent reads as an inset rounded card — same treatment the chat thread list already uses — instead of a full-bleed, sharp-cornered highlight. Content stays 16px-inset (p-1 + px-3 == old px-4). MUL-4253 Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai> * fix(chat): rename + menu upload item to "Image or files" (MUL-4250) (#5092) Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai> * fix(chat): stop welcome intro session repeating the same introduction (MUL-4259) The is_agent_intro flag on chat_session is persistent, so every follow-up turn on a welcome session re-selected the self-introduction prompt in buildChatPrompt and the agent kept replying with the same intro instead of answering the user. Gate resp.ChatIntro at claim time on the session still having zero human (role='user') messages via a new ChatSessionHasUserMessage query: the first, message-less server-driven turn introduces the agent; once the creator replies, later turns fall back to the normal reply prompt. Co-authored-by: multica-agent <github@multica.ai> * fix(chat): address review findings + unbreak CI (MUL-4171) - task:failed now refreshes the sessions list (invalidateSessionLists), so the thread-list preview / unread / sort stays correct after an agent failure — FailTask persists a failure chat_message but only broadcasts task:failed, mirroring the chat:done success path. - Self-heal stale chat deep links: once the sessions list has loaded and a ?session= id isn't in it (deleted / no access / never existed) with nothing in flight, clear the selection instead of rendering an editable empty chat that would POST into a nonexistent session. Freshly-created sessions are exempt (they carry optimistic messages + a pending task). - CI: add the new parameterless `chat` route to link-handler's WORKSPACE_ROUTE_SEGMENTS and to paths/consistency.test.ts (route set + expectedSegments) — keeps the two in sync, fixes the failing @multica/core test. - Fix a MUL-4235/MUL-4237 merge collision that broke @multica/views typecheck: chat-window.tsx still passed the removed `onPickPrompt` prop to EmptyState. Co-authored-by: multica-agent <github@multica.ai> * fix(chat): self-heal dangling session in shared controller, not just ChatPage (MUL-4171) Re-review follow-up: the stale-session self-heal only lived in ChatPage, so the floating ChatWindow still entered from a persisted activeSessionId and would render an editable empty chat (then POST into a nonexistent session) when the selected session was deleted / lost access off the /chat route. - Move the self-heal into the shared useChatController so every surface (tab and floating window) drops a dangling activeSessionId once the sessions list has loaded and doesn't contain it. - Harden ensureSession: trust the current id only when it's in the loaded list or is a just-created session still awaiting the refetch; a dangling id falls through to create a fresh session instead of POSTing into a 404. - Exempt just-created sessions via an OPTIMISTIC-write signal (hasOptimisticInFlight: pending task or optimistic- message), not hasMessages — a session deleted elsewhere with real cached history stays eligible for self-heal. Add a unit test for the discriminator. Co-authored-by: multica-agent <github@multica.ai> * test(views): fix app-sidebar useWorkspacePaths mock for the new chat nav (MUL-4171) The AppSidebar personal nav gained a `chat` item, so it calls `useWorkspacePaths().chat()` at render. The app-sidebar.test.tsx mock hadn't been updated, so `p.chat` was undefined and every render threw `TypeError: p[item.key] is not a function`, failing @multica/views#test in CI. - Add `chat: () => "/acme/chat"` to the mocked useWorkspacePaths. - Route the chat-sessions query key through a mutable `chatSessions` fixture. - Add coverage for the Chat nav: renders the link, badges the summed unread_count, and hides the badge when all sessions are read — so this drift is caught next time. Co-authored-by: multica-agent <github@multica.ai> * fix(chat): use the original floating window, not the rewritten one (MUL-4235) (#5102) Follow-up to the merged #5080, which shipped a hand-written, simplified ChatWindow and lost the original's animations / drag-resize / expand-minimize. The floating window is just a quick entry point — it should be the original UI, not a rewrite. - Restore chat-window.tsx, chat-fab.tsx, chat-resize-handles.tsx and use-chat-resize.ts verbatim from main (0-diff): motion animations, drag resize, expand/minimize and the session dropdown are back. - Restore the empty_state.returning_subtitle + starter_prompts i18n keys the original window renders (V2 had dropped them); drop the now-unused window.open_full_tooltip key the rewrite added. - Settings gating is unchanged: FloatingChat still wraps the original FAB + window, gated by floatingChatEnabled (default off) and hidden on /chat. typecheck: core/views/web/desktop green. tests: chat + settings views 126 pass. Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai> * feat(chat): archive chats from the list, delete only from Archived (MUL-4263) (#5098) Restore an archive flow as the reversible sibling of delete: - Chat list hover now offers Archive (not Delete); pin/stop unchanged. - A footer entry ('Archived · N') opens an Archived view listing archived chats; hard delete lives only there (hover -> unarchive + delete, with the existing inline confirm). - Conversation header ⋯ menu mirrors this: active chats archive, archived chats unarchive/delete. Backend: PATCH /api/chat/sessions/{id}/archive flips status active<->archived (SetChatSessionArchived), broadcasts status on chat:session_updated so other tabs re-sort into the right list. SendChatMessage already refuses archived sessions, so archived chats stay read-only until unarchived. Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai> * feat(chat): handle archived agents in Chat V2 list & conversation (MUL-4265) (#5100) * feat(chat): handle archived agents in Chat V2 list & conversation (MUL-4265) Co-authored-by: multica-agent <github@multica.ai> * refactor(chat): drop chat-list archive marker, keep conversation read-only (MUL-4265) Co-authored-by: multica-agent <github@multica.ai> * feat(chat): apply archived-agent read-only to the floating chat window (MUL-4265) Co-authored-by: multica-agent <github@multica.ai> --------- Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai> * fix(chat): address floating-window + archived-agent review blockers (MUL-4171) Re-review follow-up on the restored floating ChatWindow + archive flow: 1. Floating stale-session self-heal. The restored ChatWindow doesn't use the shared controller, so its ensureSession trusted any non-empty activeSessionId and there was no dangling-session cleanup — a deleted / no-access persisted session could send into a nonexistent session. Ported the same guard used for the tab: a self-heal effect that clears a dangling activeSessionId once the sessions list has loaded, and ensureSession only trusts an id that's in the list or has an in-flight optimistic write (hasOptimisticInFlight, reused from use-chat-controller). handleSend seeds the optimistic message + pending task before setActiveSession, so a freshly-created session is never mis-cleared. 2. Floating dropdown bypassed archive-first safety. Its active rows offered a hard-delete, letting the floating window destroy active chats and skip the "archive first, delete only from Archived" model. Active rows now ARCHIVE (reversible, one-click) like ChatThreadList; the floating window offers no hard-delete — unarchive/delete live only in the full Chat page's Archived view (reachable via expand). Removed the now-dead delete-confirm machinery. 3. Orphan user message on archived-agent send. SendChatMessage created the chat_message before EnqueueChatTask, which rejects an archived / runtime-less agent — a stale client would land a user message then get a 500, orphaning it. Added a preflight that checks the session agent's archived / runtime state and returns 409 before any mutation, plus a handler test asserting the send is rejected with no message persisted. Co-authored-by: multica-agent <github@multica.ai> --------- Co-authored-by: Lambda <lambda@multica.ai> Co-authored-by: multica-agent <github@multica.ai>