fix(keep-notes): sidebar chevron, labels sync, batch org errors, perf guards

- Notebooks: chevron visible when expanded (remove overflow clip), functional expand state
- Labels: sync/cleanup by notebookId, reconcile after note move
- Settings: refresh notebooks after cleanup; label dialog routing
- ConnectionsBadge lazy-load; reminder check persistence; i18n keys

Made-with: Cursor

keep-notes/app/api/ai/batch-organize/route.ts

@@ -42,6 +42,7 @@ export async function POST(request: NextRequest) {
       data: plan,
     })
   } catch (error) {
+    console.error('[batch-organize POST] Error:', error)
     return NextResponse.json(
       {
         success: false,