Add title template for SEO: implement dynamic title generation in app.vue using useHead for improved page title management.

app/app.vue

@@ -1,6 +1,12 @@
 <script setup lang="ts">
 import GoogleSignInPlugin from 'vue3-google-signin'
 
+useHead({
+  titleTemplate: (titleChunk) => {
+    return titleChunk ? `${titleChunk} - Lanu` : 'Lanu'
+  },
+})
+
 const { vueApp } = useNuxtApp()
 
 vueApp.use(GoogleSignInPlugin, {