add switch component

src/App.vue

@@ -1,6 +1,4 @@
 <script setup lang="ts">
-import { ref } from 'vue';
-import LoginCard from './components/LoginCard.vue';
 import { useThemeStore } from './stores/theme';
 
 const theme = useThemeStore()
@@ -12,7 +10,9 @@ const theme = useThemeStore()
     <header>
       <RouterLink to="/user"> Go to User</RouterLink>
       <RouterLink to="/login"> Go to Login</RouterLink>
+      <router-link to="/test"> Go to Test</router-link>
     </header>
+    <div></div>
 
     <main>
       <RouterView />