chore: snapshot before performance optimization

keep-notes/components/notes-tabs-view.tsx

@@ -217,7 +217,7 @@ function SortableNoteListItem({
             <Clock className="h-2.5 w-2.5" />
             {timeAgo}
           </span>
-          {note.labels && note.labels.length > 0 && (
+          {Array.isArray(note.labels) && note.labels.length > 0 && (
             <>
               <span className="text-muted-foreground/30">·</span>
               <div className="flex items-center gap-1">
@@ -307,8 +307,8 @@ export function NotesTabsView({ notes, onEdit, currentNotebookId }: NotesTabsVie
       try {
         const newNote = await createNote({ 
           content: '', 
-          title: null, 
-          notebookId: currentNotebookId || null,
+          title: undefined,
+          notebookId: currentNotebookId || undefined,
           skipRevalidation: true 
         })
         if (!newNote) return