新增一个tsx文件

app.tsx

@@ -0,0 +1,13 @@
+import "@xyflow/react/dist/style.css";
+import { Suspense } from "react";
+import { RouterProvider } from "react-router-dom";
+import { LoadingPage } from "./pages/LoadingPage";
+import router from "./routes";
+
+export default function App() {
+  return (
+    <Suspense fallback={<LoadingPage />}>
+      <RouterProvider router={router} />
+    </Suspense>
+  );
+}