web/frps: upgrade vue and element-plus (#3310)

web/frps/src/main.ts

@@ -0,0 +1,12 @@
+import { createApp } from 'vue'
+import 'element-plus/dist/index.css'
+import App from './App.vue'
+import router from './router'
+
+import './assets/custom.css'
+
+const app = createApp(App)
+
+app.use(router)
+
+app.mount('#app')