feat: Implement sync manager and file watcher for automated playlist synchronization

frontend/services/api.ts

@@ -181,4 +181,9 @@ export const apiService = {
     });
     return handleResponse(response);
   },
+
+  async getSyncStatus(): Promise<ApiResponse<{ is_syncing: boolean; last_sync_time: string | null; status: string; error: string | null }>> {
+    const response = await fetch(`${API_BASE}/api/sync/status`);
+    return handleResponse(response);
+  },
 };