Fix: useContactFolders handle paginated response (items wrapper)

frontend/src/api/contacts.ts

@@ -63,7 +63,10 @@ export function useDeleteContact() {
 export function useContactFolders() {
   return useQuery({
     queryKey: ['contactFolders'],
-    queryFn: () => apiGet<ContactFolder[]>('/contact-folders'),
+    queryFn: async () => {
+      const res = await apiGet<ContactFolder[] | { items: ContactFolder[] }>('/contact-folders');
+      return Array.isArray(res) ? res : res.items ?? [];
+    },
   });
 }