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/RoomInput.tsx

@@ -598,8 +598,8 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
     }, [editor, isMarkdown, mx, roomId, replyDraft]);
 
     const handleScheduleClick = useCallback(() => {
+      // Pre-fill from editor if there's content; open blank if editor is empty.
       const content = buildCurrentTextContent();
-      if (!content) return;
       setScheduleContent(content);
       setScheduleOpen(true);
     }, [buildCurrentTextContent]);
@@ -1171,10 +1171,12 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
           }
         />
         {pollOpen && <PollCreator room={room} roomId={roomId} onClose={() => setPollOpen(false)} />}
-        {scheduleOpen && scheduleContent && (
+        {scheduleOpen && (
           <ScheduleMessageModal
             roomId={roomId}
-            content={scheduleContent}
+            initialBody={
+              typeof scheduleContent?.body === 'string' ? scheduleContent.body : undefined
+            }
             onScheduled={handleScheduled}
             onClose={() => {
               setScheduleOpen(false);