Refresh nav on auth changes and show session info

src/components/app-shell.js

@@ -3,7 +3,9 @@ import { navBar } from './nav-bar.js';
 export function appShell(appName) {
   return `
     <div class="app-shell d-flex flex-column min-vh-100">
-      ${navBar(appName)}
+      <div id="app-nav">
+        ${navBar(appName)}
+      </div>
       <main id="route-view" class="flex-grow-1"></main>
       <div class="toast-stack" x-data="alertsData()">
         <template x-for="alert in alerts" :key="alert.id">