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

package.json

@@ -72,6 +72,9 @@
     "./features/admin/server": {
       "import": "./dist/features/admin/AdminPage.server.js"
     },
+    "./features/admin/layout": {
+      "import": "./dist/features/admin/AdminLayout.server.js"
+    },
     "./features/admin/client": {
       "import": "./dist/features/admin/AdminPage.client.js"
     },

src/features/admin/AdminLayout.server.js

@@ -0,0 +1,23 @@
+import AdminShell from './components/AdminShell.js';
+import { protectAdmin } from './protect.js';
+import { buildNavigationSections } from './navigation.js';
+import { logoutAction } from '@zen/core/features/auth/actions';
+import { getAppName } from '@zen/core';
+import './widgets/index.server.js';
+
+export default async function AdminLayout({ children }) {
+  const session = await protectAdmin();
+  const appName = getAppName();
+  const navigationSections = buildNavigationSections('/');
+
+  return (
+    <AdminShell
+      user={session.user}
+      onLogout={logoutAction}
+      appName={appName}
+      navigationSections={navigationSections}
+    >
+      {children}
+    </AdminShell>
+  );
+}

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}
+    />
   );
 }

src/features/admin/components/AdminSidebar.js

@@ -34,13 +34,6 @@ const AdminSidebar = ({ isMobileMenuOpen, setIsMobileMenuOpen, appName, enabledM
         return initial;
     });
 
-    useEffect(() => {
-        try {
-            const stored = sessionStorage.getItem('zen-admin-sidebar-collapsed');
-            if (stored !== null) setCollapsedSections(new Set(JSON.parse(stored)));
-        } catch {}
-    }, []);
-
     const toggleSection = (sectionId) => {
         setCollapsedSections(prev => {
             const next = new Set(prev);
@@ -49,9 +42,6 @@ const AdminSidebar = ({ isMobileMenuOpen, setIsMobileMenuOpen, appName, enabledM
             } else {
                 next.add(sectionId);
             }
-            try {
-                sessionStorage.setItem('zen-admin-sidebar-collapsed', JSON.stringify([...next]));
-            } catch {}
             return next;
         });
     };