fix: schedule button, compression visibility, activity log, insights overflow, bookmarks UI

Schedule message: modal now always opens (even with empty composer);
includes its own message textarea pre-filled from editor content;
removed null-content early-return guard from handleScheduleClick;
fixed error text to use color.Critical.Main not CSS var

Image compression: removed 200KB size threshold — checkbox now shows
for all JPEG/PNG uploads (not just large ones); 'no significant saving'
message handles already-small files gracefully

Activity log: auto-paginate on mount — state events are absent from
initial sync window, so the log was always empty until Load More was
clicked manually

Insights summary: Text size H4→H5 with toLocaleString() formatting and
overflow:ellipsis so large numbers don't push tiles off screen

Bookmarks panel: replaced var(--bg-*) CSS vars (undefined in folds
themes) with color.Surface/SurfaceVariant/Primary folds tokens; added
left accent border on message preview block, count badge, clear button
in search, improved empty state, cleaner button hierarchy

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/features/room-settings/RoomActivityLog.tsx

@@ -316,6 +316,13 @@ export function RoomActivityLog({ requestClose }: RoomActivityLogProps) {
     setEvents(getStateEvents());
   }, [getStateEvents]);
 
+  // Auto-paginate on mount — state events are rarely in the initial sync
+  // window, so we immediately fetch backwards to populate the log.
+  useEffect(() => {
+    handleLoadMore();
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
   const handleLoadMore = useCallback(async () => {
     if (loading || !canLoadMore) return;
     setLoading(true);