fix(notes): make empty state message readable

src/components/NoteList.tsx

@@ -6,7 +6,7 @@ function NoteList({ notes, onSelect }: NoteListProps) {
   if (notes.length === 0) {
     return (
       <div className="flex flex-col items-center justify-center gap-2 py-16 text-center">
-        <p className="whitespace-pre-line text-gray-500">{EMPTY_MESSAGE}</p>
+        <p className="whitespace-pre-line text-gray-50">{EMPTY_MESSAGE}</p>
       </div>
     )
   }