The thread composer reused RoomInput's hardcoded editableName="RoomInput", so
the main timeline's global up-arrow "edit last message" handler fired while
focused in a thread composer and targeted the MAIN timeline's last message
(wrong), and there was no up-arrow edit for the thread itself.
- Make editableName a RoomInput prop (default "RoomInput"); the thread composer
passes "ThreadInput", so the two up-arrow handlers never cross-fire.
- Add an up-arrow-edit handler to ThreadTimeline (parity with RoomTimeline):
empty thread composer + Up -> edit the latest editable reply in that thread,
using thread.liveTimeline + canEditEvent + setEditId.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
jaredandClaude Opus 4.8
f155a4dc22