Two issues:
1. Unread count didn't always clear when opening / viewing a
conversation. The reset effect keyed off conversationId only, so
a new inbound message arriving while the thread was already open
would get the server to bump unread_count to 1, but the reset
effect wouldn't re-fire. Split the fetch and unread-reset effects:
fetch stays keyed on conversationId (no unnecessary refetches on
every new message), and a second effect keyed on [conversationId,
hasUnread] flips unread back to 0 whenever it surfaces on the
active conversation. The hasUnread gate still prevents the
reset→update→realtime→re-run loop.
2. No indicator elsewhere in the app when new messages arrive. Added
useTotalUnread() hook — one-time query + realtime subscription on
the conversations table — and a pulsing green dot on the sidebar
Inbox entry when totalUnread > 0. Dot is hidden while on /inbox
itself (redundant with the per-conversation badges there).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
