Fix syntax error and finalize robust note resizing

keep-notes/components/note-card.tsx

@@ -237,15 +237,21 @@ export function NoteCard({
   }
 
   const handleSizeChange = async (size: 'small' | 'medium' | 'large') => {
-    // Notify parent of size change so it can update its state
-    onSizeChange?.(size)
+    startTransition(async () => {
+      // Instant visual feedback for the card itself
+      addOptimisticNote({ size })
 
-    // Trigger layout refresh
-    onResize?.()
-    setTimeout(() => onResize?.(), 300)
+      // Notify parent so it can update its local state
+      onSizeChange?.(size)
 
-    // Update server in background
-    updateSize(note.id, size)
+      // Trigger layout refresh
+      onResize?.()
+      setTimeout(() => onResize?.(), 300)
+
+      // Update server in background
+      await updateSize(note.id, size)
+      router.refresh()
+    })
   }
 
   const handleCheckItem = async (checkItemId: string) => {