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feat(FN-4040): anchor mobile chat views to latest message on show

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Anchored mobile ChatView and QuickChat FAB to scroll to the latest message when opened, improving chat tail behavior on small screens; added documentation for this behavior. Also aligned scoped chat manager's pluginRunner typing and expanded test coverage for both components.

Fusion-Task-Id: FN-4040
This commit is contained in:
Fusion
2026-05-11 15:53:13 -07:00
committed by gsxdsm
parent 262432af59
commit 8af867e365
5 changed files with 203 additions and 6 deletions
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docs/dashboard-guide.md
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@@ -91,6 +91,7 @@ Chat view provides project-scoped conversations with agents.
- In-progress assistant responses now survive refresh/navigation while generation is still active: Chat restores the last durable in-flight text/thinking/tool state immediately, then resumes streaming from the stored replay point instead of starting from an empty "Connecting…" placeholder.
- If a regular Chat stream drops with a hidden-tab/browser-suspension error (for example `Load failed`) while the server is still generating, Chat suppresses the false error banner, re-attaches to the in-progress stream using the durable replay state, and reconciles the final assistant reply when generation completes.
- Chat message lists now track near-bottom scroll state: while you are reading older messages, live streaming/new replies do not force-scroll; a **Latest** jump control appears until you return to the tail.
- On mobile direct-chat threads, entering a thread and restoring Chat after tab/page visibility returns re-anchors to the newest message (`scrollTop = scrollHeight`) so the view always opens at the live tail.
- On mobile (`max-width: 768px`), chat bubbles are slightly wider in full Chat for improved readability while preserving header/composer gutters.
- Full Chat tool-call summaries now use a denser mobile layout: grouped and single-call collapsed rows keep icon + label + status on one line (Quick Chat-style scanability) while expanded details remain unchanged.
- The desktop Chat view toggle and mobile Chat tab now show an unread-response indicator when a live assistant reply arrives for your active chat thread after you leave Chat; opening Chat clears it immediately.
@@ -140,6 +141,7 @@ Quick Chat is an optional floating panel for fast, project-scoped assistant conv
- On mobile viewports, opening Quick Chat auto-focuses the composer as soon as it is ready so the keyboard opens immediately
- FAB dragging uses pointer events with document-level move/up tracking and a 5px drag threshold so Android touch drags reposition reliably while short taps still open Quick Chat
- Quick Chat now mirrors full Chat tail behavior: if you scroll up, live updates stop auto-following and a **Latest** jump control appears until you jump back down.
- On mobile, Quick Chat re-anchors to the newest message whenever the panel is opened/reopened and when page visibility is restored, while still preserving the near-bottom gate so intentional scroll-away keeps **Latest** jump behavior.
- On mobile, Quick Chat bubbles are slightly wider while keeping compact tool-call summary layout and full-screen/safe-area behavior intact.
## Mailbox View