Two Matrix protocol gaps (Phase A), gate-green (683 tests):
- Mark as Unread: m.marked_unread room account data (+ com.famedly.marked_unread
fallback), a new markedUnreadAtom binder that seeds from account data and
clears on our own read receipt (MSC2867). RoomNavItem gains Mark as Unread /
Read menu items and lights the row dot for a marked room. Tested.
- Low Priority: m.lowpriority room tag mirroring favourites — a context-menu
toggle (mutually exclusive with Favorite) and a collapsed Low Priority
category sorted to the bottom of the Home room list.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
