feat: expand livestream management platform

frontend/src/App.tsx

@@ -65,7 +65,7 @@ function AppRoutes() {
   return (
     <BrowserRouter>
       <PageErrorBoundary>
-        <Suspense fallback={<div className="route-loading" role="status" aria-label="页面加载中" />}>
+        <Suspense fallback={<div className="route-loading" role="status" aria-label="页面加载中"><span /></div>}>
           <Routes>
         <Route path="/watch/:id" element={<WatchPage />} />
         <Route path="/admin/login" element={<LoginPage />} />