Address findings from 3 review agents on the Threads list panel:
- Last-activity accuracy (SDK): sort key and the "last reply <time>"
label now use thread.replyToEvent.getTs() (server bundle latest_event)
instead of lastReply(), which returns the ROOT time until each thread's
replies lazily paginate (or permanently on fetch error). Applied to the
hook signature too.
- Live-refresh completeness (correctness): the useRoomThreads signature
now includes thread.length and the root event's replacingEventId, so a
mid-thread redaction (reply count) and a root-message edit (row snippet)
refresh the row live instead of going stale.
- a11y: the row's aria-label was the button's whole accessible name,
hiding the snippet/count/unread from screen readers. It now describes
the thread ("Open thread by <name>, unread, N replies, last reply ..").
- Unread badge: replaced the bare green dot (Success = the mention color)
with the app-wide UnreadBadge, using the Highlight count so mentions
render red and ordinary unread renders secondary, matching room-nav.
- Hover/focus affordance: the clickable row moved its inline styles to a
css class with token-based :hover / :active backgrounds.
- Participant pile now also includes the last replier from the bundle.
- Stabilized the panel's onClose/onOpenThread with useCallback so its
Escape listener isn't re-subscribed every Room render. Added
filter->sort pipeline + all/participating immutability tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>