fix: 修复挂载路由时使用$loadingBar出错问题

src/main.js

@@ -13,7 +13,7 @@ async function setupApp() {
 
   await setupRouter(app)
 
-  app.mount('#app', true)
+  app.mount('#app')
 }
 
 setupApp()

src/router/guard/pageLoadingGuard.js

@@ -1,15 +1,15 @@
 export function createPageLoadingGuard(router) {
   router.beforeEach(() => {
-    $loadingBar.start()
+    window.$loadingBar?.start()
   })
 
   router.afterEach(() => {
     setTimeout(() => {
-      $loadingBar.finish()
+      window.$loadingBar?.finish()
     }, 200)
   })
 
   router.onError(() => {
-    $loadingBar.error()
+    window.$loadingBar?.error()
   })
 }