feat(admin): extract AdminLayout as a separate server component

src/features/admin/AdminPage.server.js

@@ -1,32 +1,17 @@
-import AdminShell from './components/AdminShell.js';
 import AdminPageClient from './AdminPage.client.js';
 import { protectAdmin } from './protect.js';
-import { buildNavigationSections } from './navigation.js';
 import { collectWidgetData } from './registry.js';
-import { logoutAction } from '@zen/core/features/auth/actions';
-import { getAppName } from '@zen/core';
-import './widgets/index.server.js';
 
 export default async function AdminPage({ params }) {
   const resolvedParams = await params;
   const session = await protectAdmin();
-  const appName = getAppName();
-
   const widgetData = await collectWidgetData();
-  const navigationSections = buildNavigationSections('/');
 
   return (
-    <AdminShell
+    <AdminPageClient
+      params={resolvedParams}
       user={session.user}
-      onLogout={logoutAction}
-      appName={appName}
-      navigationSections={navigationSections}
-    >
-      <AdminPageClient
-        params={resolvedParams}
-        user={session.user}
-        widgetData={widgetData}
-      />
-    </AdminShell>
+      widgetData={widgetData}
+    />
   );
 }