Add admin FAQ help article

resources/js/admin/mobile/__tests__/HelpCenterPage.test.tsx

@@ -3,7 +3,7 @@ import { describe, expect, it, vi } from 'vitest';
 import { render, screen } from '@testing-library/react';
 
 const articles = [
-  { slug: 'admin-issue-resolution', title: 'FAQ & Troubleshooting', summary: 'Common issues.' },
+  { slug: 'faq-admin', title: 'FAQ: Event Admin', summary: 'Common issues.' },
   { slug: 'tenant-dashboard-overview', title: 'Dashboard overview', summary: 'Learn the dashboard.' },
 ];
 
@@ -89,7 +89,7 @@ describe('MobileHelpCenterPage', () => {
   it('renders FAQ and guide articles', async () => {
     render(<MobileHelpCenterPage />);
 
-    expect(screen.getByText('FAQ & Troubleshooting')).toBeInTheDocument();
+    expect(screen.getByText('FAQ: Event Admin')).toBeInTheDocument();
     expect(screen.getByText('Dashboard overview')).toBeInTheDocument();
   });
 });