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/utils/imageCompression.ts

@@ -7,11 +7,10 @@ export type CompressionResult = {
 };
 
 const COMPRESSIBLE_TYPES = ['image/jpeg', 'image/png'];
-const COMPRESSION_SKIP_THRESHOLD = 200 * 1024; // 200 KB
 
-/** Returns true if this file type can be compressed AND the file is large enough to bother. */
+/** Returns true if this file type can be compressed (JPEG or PNG, any size). */
 export function isCompressible(file: File): boolean {
-  return COMPRESSIBLE_TYPES.includes(file.type) && file.size >= COMPRESSION_SKIP_THRESHOLD;
+  return COMPRESSIBLE_TYPES.includes(file.type);
 }
 
 /**