Update Lighthouse report for /settings/profile and fix runtime errors

- Updated `lighthouse-report.json` to reflect audit for `http://localhost:3000/settings/profile`.
- Resolved `CHROME_INTERSTITIAL_ERROR` runtime issues.
- Added HTTPS and performance audit metrics, improving accuracy and insights.

frontend/src/app/admin/layout.tsx

@@ -0,0 +1,34 @@
+/**
+ * Admin Route Group Layout
+ * Wraps all admin routes with AuthGuard requiring superuser privileges
+ */
+
+import type { Metadata } from 'next';
+import { AuthGuard } from '@/components/auth';
+import { Header } from '@/components/layout/Header';
+import { Footer } from '@/components/layout/Footer';
+
+export const metadata: Metadata = {
+  title: {
+    template: '%s | Admin | FastNext Template',
+    default: 'Admin Dashboard',
+  },
+};
+
+export default function AdminLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <AuthGuard requireAdmin>
+      <div className="flex min-h-screen flex-col">
+        <Header />
+        <main className="flex-1">
+          {children}
+        </main>
+        <Footer />
+      </div>
+    </AuthGuard>
+  );
+}