Handles the native `lotus-notification-mark-read` event through the
same `markAsRead` path as the room menu's "Mark as Read", honouring the
private-receipt settings. Verified: 3 unread → 0 on the server.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
- useTauriFocusAssist queries the new `get_focus_assist` command on mount.
The native poll's first reading is emitted during app setup, before the
page listens, and the atom resets on every reload — so with Focus Assist
already on, notifications leaked until the OS state flipped
(cinny-desktop #15).
- The toast quick reply takes the real `threadId` from the notification
data and replies inside the thread (cinny-desktop #17).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA