Add PWA service worker (via vite plugin), use dynamic viewport units for interface size (improves mobile experience), replace default vue homepage with basic info

frontend/src/views/HomeView.vue

@@ -1,9 +1,29 @@
 <script setup>
-import TheWelcome from '../components/TheWelcome.vue'
+  //import TheWelcome from '../components/TheWelcome.vue'
+  import TitleBar from '../components/TitleBar.vue';
 </script>
 
 <template>
   <main>
-    <TheWelcome />
+    <TitleBar>
+      <h1>Horde Agent Hub</h1>
+    </TitleBar>
+
+    <div class="home-content">
+      <p>This is the Hub for Horde Agents. You can configure agents, interact and chat with them.</p>
+      <p>In the left panel, you can open chats from the <strong>Chats Tab</strong> and edit agents from the <strong>Agents Tab</strong>.</p>
+      <br>
+      <p>We accept contributions at our <a href="javascript:;">github repository</a></p>
+    </div>
+
+    <!--TheWelcome /-->
   </main>
 </template>
+
+<style scoped>
+  .home-content {
+    max-width: 900px;
+    margin: 2em auto auto;
+    padding: 0 5em 0 2em;
+  }
+</style>