style: apply prettier across fork files

check:prettier was not part of my gate routine, so formatting drift accumulated
across the session's touched files (and a few older ones). Run prettier --write
to bring the repo back to 'All matched files use Prettier code style!'.
Formatting only — no logic changes. tsc/tests/build all green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/hooks/useRoomThreads.ts

@@ -46,7 +46,10 @@ export function useRoomThreads(room: Room): Thread[] {
     // Force the first push, then pull the full server-known thread list.
     sigRef.current = '';
     refresh();
-    room.fetchRoomThreads().then(refresh).catch(() => undefined);
+    room
+      .fetchRoomThreads()
+      .then(refresh)
+      .catch(() => undefined);
 
     room.on(ThreadEvent.New, refresh);
     room.on(ThreadEvent.NewReply, refresh);