Add unit tests for Admin pages: Settings, Users, and Organizations

- Implemented rendering tests for titles, descriptions, placeholders, and feature lists.
- Verified proper container structure and navigation links for each admin page.

frontend/tests/app/(authenticated)/settings/preferences/page.test.tsx

@@ -1,26 +1,29 @@
 /**
  * Tests for Preferences Page
- * Smoke tests for placeholder page
+ * Verifies rendering of preferences placeholder
  */
 
 import { render, screen } from '@testing-library/react';
 import PreferencesPage from '@/app/(authenticated)/settings/preferences/page';
 
 describe('PreferencesPage', () => {
-  it('renders without crashing', () => {
+  it('renders page title', () => {
     render(<PreferencesPage />);
+
     expect(screen.getByText('Preferences')).toBeInTheDocument();
   });
 
-  it('renders heading', () => {
+  it('renders placeholder message', () => {
     render(<PreferencesPage />);
 
-    expect(screen.getByRole('heading', { name: /^preferences$/i })).toBeInTheDocument();
+    expect(
+      screen.getByText(/Configure your preferences/)
+    ).toBeInTheDocument();
   });
 
-  it('shows placeholder text', () => {
+  it('mentions Task 3.5', () => {
     render(<PreferencesPage />);
 
-    expect(screen.getByText(/configure your preferences/i)).toBeInTheDocument();
+    expect(screen.getByText(/Task 3.5/)).toBeInTheDocument();
   });
 });

frontend/tests/app/admin/organizations/page.test.tsx

@@ -0,0 +1,64 @@
+/**
+ * Tests for Admin Organizations Page
+ * Verifies rendering of organization management placeholder
+ */
+
+import { render, screen } from '@testing-library/react';
+import AdminOrganizationsPage from '@/app/admin/organizations/page';
+
+describe('AdminOrganizationsPage', () => {
+  it('renders page title', () => {
+    render(<AdminOrganizationsPage />);
+
+    expect(screen.getByText('Organizations')).toBeInTheDocument();
+  });
+
+  it('renders page description', () => {
+    render(<AdminOrganizationsPage />);
+
+    expect(
+      screen.getByText('Manage organizations and their members')
+    ).toBeInTheDocument();
+  });
+
+  it('renders back button link', () => {
+    render(<AdminOrganizationsPage />);
+
+    const backLink = screen.getByRole('link', { name: '' });
+    expect(backLink).toHaveAttribute('href', '/admin');
+  });
+
+  it('renders coming soon message', () => {
+    render(<AdminOrganizationsPage />);
+
+    expect(
+      screen.getByText('Organization Management Coming Soon')
+    ).toBeInTheDocument();
+  });
+
+  it('renders feature list', () => {
+    render(<AdminOrganizationsPage />);
+
+    expect(
+      screen.getByText(/Organization list with search and filtering/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/View organization details and members/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/Manage organization memberships/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/Organization statistics and activity/)
+    ).toBeInTheDocument();
+    expect(screen.getByText(/Bulk operations/)).toBeInTheDocument();
+  });
+
+  it('renders with proper container structure', () => {
+    const { container } = render(<AdminOrganizationsPage />);
+
+    const containerDiv = container.querySelector('.container');
+    expect(containerDiv).toBeInTheDocument();
+    expect(containerDiv).toHaveClass('mx-auto', 'px-6', 'py-8');
+  });
+});

frontend/tests/app/admin/settings/page.test.tsx

@@ -0,0 +1,66 @@
+/**
+ * Tests for Admin Settings Page
+ * Verifies rendering of system settings placeholder
+ */
+
+import { render, screen } from '@testing-library/react';
+import AdminSettingsPage from '@/app/admin/settings/page';
+
+describe('AdminSettingsPage', () => {
+  it('renders page title', () => {
+    render(<AdminSettingsPage />);
+
+    expect(screen.getByText('System Settings')).toBeInTheDocument();
+  });
+
+  it('renders page description', () => {
+    render(<AdminSettingsPage />);
+
+    expect(
+      screen.getByText('Configure system-wide settings and preferences')
+    ).toBeInTheDocument();
+  });
+
+  it('renders back button link', () => {
+    render(<AdminSettingsPage />);
+
+    const backLink = screen.getByRole('link', { name: '' });
+    expect(backLink).toHaveAttribute('href', '/admin');
+  });
+
+  it('renders coming soon message', () => {
+    render(<AdminSettingsPage />);
+
+    expect(
+      screen.getByText('System Settings Coming Soon')
+    ).toBeInTheDocument();
+  });
+
+  it('renders feature list', () => {
+    render(<AdminSettingsPage />);
+
+    expect(
+      screen.getByText(/General system configuration/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/Email and notification settings/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/Security and authentication options/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/API and integration settings/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/Maintenance and backup tools/)
+    ).toBeInTheDocument();
+  });
+
+  it('renders with proper container structure', () => {
+    const { container } = render(<AdminSettingsPage />);
+
+    const containerDiv = container.querySelector('.container');
+    expect(containerDiv).toBeInTheDocument();
+    expect(containerDiv).toHaveClass('mx-auto', 'px-6', 'py-8');
+  });
+});

frontend/tests/app/admin/users/page.test.tsx

@@ -0,0 +1,60 @@
+/**
+ * Tests for Admin Users Page
+ * Verifies rendering of user management placeholder
+ */
+
+import { render, screen } from '@testing-library/react';
+import AdminUsersPage from '@/app/admin/users/page';
+
+describe('AdminUsersPage', () => {
+  it('renders page title', () => {
+    render(<AdminUsersPage />);
+
+    expect(screen.getByText('User Management')).toBeInTheDocument();
+  });
+
+  it('renders page description', () => {
+    render(<AdminUsersPage />);
+
+    expect(
+      screen.getByText('View, create, and manage user accounts')
+    ).toBeInTheDocument();
+  });
+
+  it('renders back button link', () => {
+    render(<AdminUsersPage />);
+
+    const backLink = screen.getByRole('link', { name: '' });
+    expect(backLink).toHaveAttribute('href', '/admin');
+  });
+
+  it('renders coming soon message', () => {
+    render(<AdminUsersPage />);
+
+    expect(screen.getByText('User Management Coming Soon')).toBeInTheDocument();
+  });
+
+  it('renders feature list', () => {
+    render(<AdminUsersPage />);
+
+    expect(
+      screen.getByText(/User list with search and filtering/)
+    ).toBeInTheDocument();
+    expect(
+      screen.getByText(/Create\/edit\/delete user accounts/)
+    ).toBeInTheDocument();
+    expect(screen.getByText(/Activate\/deactivate users/)).toBeInTheDocument();
+    expect(
+      screen.getByText(/Role and permission management/)
+    ).toBeInTheDocument();
+    expect(screen.getByText(/Bulk operations/)).toBeInTheDocument();
+  });
+
+  it('renders with proper container structure', () => {
+    const { container } = render(<AdminUsersPage />);
+
+    const containerDiv = container.querySelector('.container');
+    expect(containerDiv).toBeInTheDocument();
+    expect(containerDiv).toHaveClass('mx-auto', 'px-6', 'py-8');
+  });
+});