Refactor Admin Organizations tests and enhance useAdmin hooks with session stats

- Simplified `AdminOrganizationsPage` tests by mocking `OrganizationManagementContent` and focusing on essential structure and content rendering.
- Updated `useAdmin` hooks to integrate `adminListSessions` and accommodate session statistics in superuser scenarios.
- Added relevant test coverage for session data fetching and validation.

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

@@ -1,59 +1,17 @@
 /**
  * Tests for Admin Organizations Page
- * Verifies rendering of organization management placeholder
+ * Basic structural tests - full component testing in E2E tests
  */
 
 import { render, screen } from '@testing-library/react';
 import AdminOrganizationsPage from '@/app/admin/organizations/page';
 
+// Mock the entire OrganizationManagementContent component
+jest.mock('@/components/admin/organizations/OrganizationManagementContent', () => ({
+  OrganizationManagementContent: () => <div data-testid="organization-management">Organization Management</div>,
+}));
+
 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 />);
 
@@ -61,4 +19,10 @@ describe('AdminOrganizationsPage', () => {
     expect(containerDiv).toBeInTheDocument();
     expect(containerDiv).toHaveClass('mx-auto', 'px-6', 'py-8');
   });
+
+  it('renders organization management content', () => {
+    render(<AdminOrganizationsPage />);
+
+    expect(screen.getByTestId('organization-management')).toBeInTheDocument();
+  });
 });