push notification

fix implemented

frontend/src/queries/push.ts

@@ -0,0 +1,20 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import * as api from '../lib/api';
+
+export function usePushStats() {
+  return useQuery({
+    queryKey: ['push', 'stats'],
+    queryFn: api.fetchPushStats,
+  });
+}
+
+export function useSendPushNotification() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: api.sendPushNotification,
+    onSuccess: () => {
+      void queryClient.invalidateQueries({ queryKey: ['push', 'stats'] });
+    },
+  });
+}