added logout function and persistent pinia store

src/App.vue

@@ -1,17 +1,12 @@
-<script setup lang="ts">
-import { RouterView } from 'vue-router';
-import ProtectedData from './components/ProtectedData.vue';
-defineOptions({
+<script lang="ts">
+import { defineComponent } from 'vue';
+
+export default defineComponent({
   name: 'App'
 });
 </script>
 
 <template>
-  <header>
-    <img alt="Quasar logo" src="./assets/quasar-logo-vertical.svg" width="200vw"/>
-
-    <ProtectedData />
-  </header>
   <router-view />
 </template>