added token storage in a store, and improved layout on mobile

src/App.vue

@@ -1,10 +1,25 @@
-<script setup lang="ts">
-import { useAuthStore } from "./stores/auth";
-
-const auth = useAuthStore();
-</script>
-
 <template>
-  <!-- You can later replace this with a real layout -->
-  <router-view />
+  <div id="page">
+    <router-view />
+  </div>
 </template>
+
+<style scoped>
+#page {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  height: 100vh;
+  padding: 2rem;
+  box-sizing: border-box;
+  background: var(--background);
+}
+
+@media screen and (max-width: 720px) {
+  #page {
+    padding: 0;
+    padding-top: 20px;
+    padding-bottom: 40px;
+  }
+}
+</style>