message: Fix room list sorted by recent on app startup
diff: @@ -111,7 +111,7 @@ const getLastTs = (r: Room, userId: string) => {
  const threadLastEventTimestamps = r.getThreads().map(thread => {
  const event = thread.replyToEvent ?? thread.rootEvent;
  - return event!.getTs();
  + return event?.getTs() ?? 0;
  });
  return Math.max(mainTimelineLastTs, ...threadLastEventTimestamps);
  