修复 React Query 未提供 QueryClientProvider 导致的运行时错误

- main.tsx 中增加 QueryClientProvider 包裹 RouterProvider
- router.tsx 的 getRouter() 改为返回 { router, queryClient } 对象
- 确保 useQuery 在组件树中能正常获取 QueryClient 上下文

src/main.tsx

@@ -1,14 +1,17 @@
 // 应用入口：样式在 ./styles.css（Tailwind v4 + design token），路由见 ./router.tsx
 import React from "react";
 import ReactDOM from "react-dom/client";
+import { QueryClientProvider } from "@tanstack/react-query";
 import { RouterProvider } from "@tanstack/react-router";
 import { getRouter } from "./router";
 import "./styles.css";
 
-const router = getRouter();
+const { router, queryClient } = getRouter();
 
 ReactDOM.createRoot(document.getElementById("root")!).render(
   <React.StrictMode>
+    <QueryClientProvider client={queryClient}>
       <RouterProvider router={router} />
+    </QueryClientProvider>
   </React.StrictMode>
 );

src/router.tsx

@@ -20,5 +20,5 @@ export const getRouter = () => {
     defaultPreloadStaleTime: 0,
   });
 
-  return router;
+  return { router, queryClient };
 };