fix(server): blank screen on mobile (#8460)

Co-authored-by: forehalo <forehalo@gmail.com>

packages/frontend/admin/src/index.tsx

@@ -1,4 +1,5 @@
 import './global.css';
+import './setup';
 
 import { createRoot } from 'react-dom/client';
 

packages/frontend/admin/src/setup.ts

@@ -0,0 +1,3 @@
+import { setupBrowser } from '@affine/core/bootstrap';
+
+await setupBrowser();