- T1 (🔴): markThreadAsRead no longer receipts the thread ROOT (a 2nd instance
of the read-marker-corruption regression — opening a thread whose root is old
re-lit the whole room). Extracted to a pure threadReceipt.ts + 5 regression
tests.
- N1 (🔴): favicon/tab-title unread count now sums only leaf rooms (was double-
counting every ancestor-space aggregate in roomToUnread).
- N2 (🔴): notifications/sounds dedupe on the event id, not the unread count —
fixes "read a DM, next message never notifies again".
- T4 (🟠): the thread notification path no longer re-gates on the room count, so
an explicit per-thread "All replies" override in a Mentions-only room fires.
- N3 (🟠): getUnreadInfos skips phantom {0,0} entries (muted-thread-only rooms no
longer light the nav row / pollute unread filters).
- N4 (🟠): the Receipt handler recomputes unread instead of blanket-DELETE, so a
threaded receipt can't wipe a room's valid main-timeline badge.
- T2 (🟠): thread "Jump to Latest" re-anchors the virtual window (was landing on
a stale mid/old event).
Gates: tsc/eslint/prettier clean, build OK, 678 tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
jared
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