fix(ui,auth): fix login overlay styles, PWA service worker scope, favicon, and update user config to kopri

app/static/js/app.js

@@ -2,11 +2,9 @@
 document.addEventListener('DOMContentLoaded', () => {
     // Register PWA Service Worker
     if ('serviceWorker' in navigator) {
-        window.addEventListener('load', () => {
-            navigator.serviceWorker.register('/static/sw.js')
-                .then(reg => console.log('Notes PWA ServiceWorker active:', reg.scope))
-                .catch(err => console.log('Notes ServiceWorker failed:', err));
-        });
+        navigator.serviceWorker.register('/sw.js', { scope: '/' })
+            .then(reg => console.log('Notes PWA ServiceWorker active:', reg.scope))
+            .catch(err => console.log('Notes ServiceWorker failed:', err));
     }
 
     // App State
@@ -316,11 +314,13 @@ document.addEventListener('DOMContentLoaded', () => {
 
     function showLogin() {
         loginOverlay.classList.remove('hidden');
+        if (appShell) appShell.classList.add('hidden');
         loginUsername.focus();
     }
 
     function showApp() {
         loginOverlay.classList.add('hidden');
+        if (appShell) appShell.classList.remove('hidden');
         userDisplayName.textContent = currentUser ? currentUser.username : 'user';
     }