refactor: refactor async routes

src/views/dashboard/route.js

@@ -0,0 +1,23 @@
+const Layout = () => import('@/layout/index.vue')
+
+export default {
+  name: 'Dashboard',
+  path: '/',
+  component: Layout,
+  redirect: '/home',
+  meta: {
+    title: 'Dashboard',
+    icon: 'mdi:chart-bar',
+  },
+  children: [
+    {
+      name: 'Home',
+      path: 'home',
+      component: () => import('./index.vue'),
+      meta: {
+        title: '首页',
+        icon: 'mdi:home',
+      },
+    },
+  ],
+}