feat(admin): sync page title to admin shell via context

src/features/admin/AdminPage.client.js

@@ -1,6 +1,8 @@
 'use client';
 
+import { useEffect } from 'react';
 import { getPage } from './registry.js';
+import { useAdminPageTitle } from './components/AdminPageTitleContext.js';
 import './pages/DashboardPage.client.js';
 import './pages/UsersPage.client.js';
 import './pages/RolesPage.client.js';
@@ -9,10 +11,16 @@ import './widgets/index.client.js';
 
 export default function AdminPageClient({ params, user, widgetData }) {
   const parts = params?.admin || [];
-  const [first, second, third] = parts;
+  const [first] = parts;
 
   const slug = first || 'dashboard';
   const page = getPage(slug) || getPage('dashboard');
+  const { setTitle } = useAdminPageTitle();
+
+  useEffect(() => {
+    if (page?.title) setTitle(page.title);
+  }, [page?.title]);
+
   if (!page) return null;
 
   const { Component } = page;