Add comprehensive tests for authentication, settings, and password reset pages

- Introduced smoke tests for Login, Register, Password Reset, Password Reset Confirm, and Settings pages.
- Enhanced test coverage for all dynamic imports using mocks and added Jest exclusions for non-testable Next.js files.
- Added component-specific test files for better structure and maintainability.
- Improved test isolation by mocking navigation, providers, and rendering contexts.

frontend/tests/app/(auth)/login/page.test.tsx

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+/**
+ * Tests for Login Page
+ * Smoke tests to verify page structure and component rendering
+ */
+
+import { render, screen } from '@testing-library/react';
+import LoginPage from '@/app/(auth)/login/page';
+
+// Mock dynamic import
+jest.mock('next/dynamic', () => ({
+  __esModule: true,
+  default: (importFn: () => Promise<any>, options?: any) => {
+    const Component = () => <div data-testid="login-form">Mocked LoginForm</div>;
+    Component.displayName = 'LoginForm';
+    return Component;
+  },
+}));
+
+describe('LoginPage', () => {
+  it('renders without crashing', () => {
+    render(<LoginPage />);
+    expect(screen.getByText('Sign in to your account')).toBeInTheDocument();
+  });
+
+  it('renders heading and description', () => {
+    render(<LoginPage />);
+
+    expect(screen.getByRole('heading', { name: /sign in to your account/i })).toBeInTheDocument();
+    expect(screen.getByText(/access your dashboard and manage your account/i)).toBeInTheDocument();
+  });
+
+  it('renders LoginForm component', () => {
+    render(<LoginPage />);
+
+    expect(screen.getByTestId('login-form')).toBeInTheDocument();
+  });
+});

frontend/tests/app/(auth)/password-reset/confirm/PasswordResetConfirmContent.test.tsx

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+/**
+ * Tests for Password Reset Confirm Content Component
+ * Verifies token validation and form rendering
+ */
+
+import { render, screen, act } from '@testing-library/react';
+import { useSearchParams, useRouter } from 'next/navigation';
+import PasswordResetConfirmContent from '@/app/(auth)/password-reset/confirm/PasswordResetConfirmContent';
+
+// Mock Next.js navigation
+jest.mock('next/navigation', () => ({
+  useSearchParams: jest.fn(),
+  useRouter: jest.fn(),
+  default: jest.fn(),
+}));
+
+// Mock Next.js Link
+jest.mock('next/link', () => ({
+  __esModule: true,
+  default: ({ children, href }: { children: React.ReactNode; href: string }) => (
+    <a href={href}>{children}</a>
+  ),
+}));
+
+// Mock dynamic import
+jest.mock('next/dynamic', () => ({
+  __esModule: true,
+  default: (importFn: () => Promise<any>, options?: any) => {
+    const Component = ({ onSuccess }: { onSuccess?: () => void }) => (
+      <div data-testid="password-reset-confirm-form">
+        <button onClick={onSuccess}>Submit</button>
+      </div>
+    );
+    Component.displayName = 'PasswordResetConfirmForm';
+    return Component;
+  },
+}));
+
+// Mock Alert component
+jest.mock('@/components/ui/alert', () => ({
+  Alert: ({ children }: { children: React.ReactNode }) => (
+    <div data-testid="alert">{children}</div>
+  ),
+}));
+
+describe('PasswordResetConfirmContent', () => {
+  let mockPush: jest.Mock;
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    jest.useFakeTimers();
+
+    mockPush = jest.fn();
+    (useRouter as jest.Mock).mockReturnValue({
+      push: mockPush,
+    });
+  });
+
+  afterEach(() => {
+    jest.runOnlyPendingTimers();
+    jest.useRealTimers();
+  });
+
+  describe('With valid token', () => {
+    beforeEach(() => {
+      (useSearchParams as jest.Mock).mockReturnValue({
+        get: jest.fn((key: string) => (key === 'token' ? 'valid-token-123' : null)),
+      });
+    });
+
+    it('renders without crashing', () => {
+      render(<PasswordResetConfirmContent />);
+      expect(screen.getByText('Set new password')).toBeInTheDocument();
+    });
+
+    it('renders heading and description', () => {
+      render(<PasswordResetConfirmContent />);
+
+      expect(screen.getByRole('heading', { name: /set new password/i })).toBeInTheDocument();
+      expect(screen.getByText(/choose a strong password/i)).toBeInTheDocument();
+    });
+
+    it('renders PasswordResetConfirmForm with token', () => {
+      render(<PasswordResetConfirmContent />);
+
+      expect(screen.getByTestId('password-reset-confirm-form')).toBeInTheDocument();
+    });
+
+    it('redirects to login after successful password reset', () => {
+      render(<PasswordResetConfirmContent />);
+
+      const submitButton = screen.getByRole('button', { name: /submit/i });
+
+      // Trigger success handler
+      act(() => {
+        submitButton.click();
+      });
+
+      // Fast-forward time by 3 seconds
+      act(() => {
+        jest.advanceTimersByTime(3000);
+      });
+
+      expect(mockPush).toHaveBeenCalledWith('/login');
+    });
+
+    it('cleans up timeout on unmount', () => {
+      const { unmount } = render(<PasswordResetConfirmContent />);
+
+      const submitButton = screen.getByRole('button', { name: /submit/i });
+
+      // Trigger success handler
+      act(() => {
+        submitButton.click();
+      });
+
+      // Unmount before timeout fires
+      unmount();
+
+      // Fast-forward time
+      act(() => {
+        jest.advanceTimersByTime(3000);
+      });
+
+      // Should not redirect because component was unmounted
+      expect(mockPush).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('Without token', () => {
+    beforeEach(() => {
+      (useSearchParams as jest.Mock).mockReturnValue({
+        get: jest.fn(() => null),
+      });
+    });
+
+    it('shows invalid reset link error', () => {
+      render(<PasswordResetConfirmContent />);
+
+      expect(screen.getByRole('heading', { name: /invalid reset link/i })).toBeInTheDocument();
+      expect(screen.getByTestId('alert')).toBeInTheDocument();
+    });
+
+    it('shows error message', () => {
+      render(<PasswordResetConfirmContent />);
+
+      expect(screen.getByText(/this password reset link is invalid or has expired/i)).toBeInTheDocument();
+    });
+
+    it('shows link to request new reset', () => {
+      render(<PasswordResetConfirmContent />);
+
+      const link = screen.getByRole('link', { name: /request new reset link/i });
+      expect(link).toBeInTheDocument();
+      expect(link).toHaveAttribute('href', '/password-reset');
+    });
+
+    it('does not render form when token is missing', () => {
+      render(<PasswordResetConfirmContent />);
+
+      expect(screen.queryByTestId('password-reset-confirm-form')).not.toBeInTheDocument();
+    });
+  });
+});

frontend/tests/app/(auth)/password-reset/confirm/page.test.tsx

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+/**
+ * Tests for Password Reset Confirm Page
+ * Verifies Suspense wrapper and fallback
+ */
+
+import { render, screen } from '@testing-library/react';
+import PasswordResetConfirmPage from '@/app/(auth)/password-reset/confirm/page';
+
+// Mock the content component
+jest.mock('@/app/(auth)/password-reset/confirm/PasswordResetConfirmContent', () => ({
+  __esModule: true,
+  default: () => <div data-testid="password-reset-confirm-content">Content</div>,
+}));
+
+describe('PasswordResetConfirmPage', () => {
+  it('renders without crashing', () => {
+    render(<PasswordResetConfirmPage />);
+    expect(screen.getByTestId('password-reset-confirm-content')).toBeInTheDocument();
+  });
+
+  it('wraps content in Suspense boundary', () => {
+    render(<PasswordResetConfirmPage />);
+    // Content should render successfully (not fallback)
+    expect(screen.getByTestId('password-reset-confirm-content')).toBeInTheDocument();
+  });
+});

frontend/tests/app/(auth)/password-reset/page.test.tsx

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+/**
+ * Tests for Password Reset Page
+ * Smoke tests to verify page structure and component rendering
+ */
+
+import { render, screen } from '@testing-library/react';
+import PasswordResetPage from '@/app/(auth)/password-reset/page';
+
+// Mock dynamic import
+jest.mock('next/dynamic', () => ({
+  __esModule: true,
+  default: (importFn: () => Promise<any>, options?: any) => {
+    const Component = () => <div data-testid="password-reset-form">Mocked PasswordResetRequestForm</div>;
+    Component.displayName = 'PasswordResetRequestForm';
+    return Component;
+  },
+}));
+
+describe('PasswordResetPage', () => {
+  it('renders without crashing', () => {
+    render(<PasswordResetPage />);
+    expect(screen.getByText('Reset your password')).toBeInTheDocument();
+  });
+
+  it('renders heading and description', () => {
+    render(<PasswordResetPage />);
+
+    expect(screen.getByRole('heading', { name: /reset your password/i })).toBeInTheDocument();
+    expect(screen.getByText(/we'll send you an email with instructions/i)).toBeInTheDocument();
+  });
+
+  it('renders PasswordResetRequestForm component', () => {
+    render(<PasswordResetPage />);
+
+    expect(screen.getByTestId('password-reset-form')).toBeInTheDocument();
+  });
+});

frontend/tests/app/(auth)/register/page.test.tsx

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+/**
+ * Tests for Register Page
+ * Smoke tests to verify page structure and component rendering
+ */
+
+import { render, screen } from '@testing-library/react';
+import RegisterPage from '@/app/(auth)/register/page';
+
+// Mock dynamic import
+jest.mock('next/dynamic', () => ({
+  __esModule: true,
+  default: (importFn: () => Promise<any>, options?: any) => {
+    const Component = () => <div data-testid="register-form">Mocked RegisterForm</div>;
+    Component.displayName = 'RegisterForm';
+    return Component;
+  },
+}));
+
+describe('RegisterPage', () => {
+  it('renders without crashing', () => {
+    render(<RegisterPage />);
+    expect(screen.getByText('Create your account')).toBeInTheDocument();
+  });
+
+  it('renders heading and description', () => {
+    render(<RegisterPage />);
+
+    expect(screen.getByRole('heading', { name: /create your account/i })).toBeInTheDocument();
+    expect(screen.getByText(/get started with your free account today/i)).toBeInTheDocument();
+  });
+
+  it('renders RegisterForm component', () => {
+    render(<RegisterPage />);
+
+    expect(screen.getByTestId('register-form')).toBeInTheDocument();
+  });
+});

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

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+/**
+ * Tests for Settings Index Page
+ * Verifies redirect behavior
+ */
+
+import { redirect } from 'next/navigation';
+import SettingsPage from '@/app/(authenticated)/settings/page';
+
+// Mock Next.js navigation - redirect throws to interrupt execution
+jest.mock('next/navigation', () => ({
+  redirect: jest.fn(() => {
+    throw new Error('NEXT_REDIRECT');
+  }),
+}));
+
+describe('SettingsPage', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('redirects to /settings/profile', () => {
+    expect(() => SettingsPage()).toThrow('NEXT_REDIRECT');
+    expect(redirect).toHaveBeenCalledWith('/settings/profile');
+  });
+});

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

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+/**
+ * Tests for Password Settings Page
+ * Smoke tests for placeholder page
+ */
+
+import { render, screen } from '@testing-library/react';
+import PasswordSettingsPage from '@/app/(authenticated)/settings/password/page';
+
+describe('PasswordSettingsPage', () => {
+  it('renders without crashing', () => {
+    render(<PasswordSettingsPage />);
+    expect(screen.getByText('Password Settings')).toBeInTheDocument();
+  });
+
+  it('renders heading', () => {
+    render(<PasswordSettingsPage />);
+
+    expect(screen.getByRole('heading', { name: /password settings/i })).toBeInTheDocument();
+  });
+
+  it('shows placeholder text', () => {
+    render(<PasswordSettingsPage />);
+
+    expect(screen.getByText(/change your password/i)).toBeInTheDocument();
+  });
+});

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

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

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

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+/**
+ * Tests for Profile Settings Page
+ * Smoke tests for placeholder page
+ */
+
+import { render, screen } from '@testing-library/react';
+import ProfileSettingsPage from '@/app/(authenticated)/settings/profile/page';
+
+describe('ProfileSettingsPage', () => {
+  it('renders without crashing', () => {
+    render(<ProfileSettingsPage />);
+    expect(screen.getByText('Profile Settings')).toBeInTheDocument();
+  });
+
+  it('renders heading', () => {
+    render(<ProfileSettingsPage />);
+
+    expect(screen.getByRole('heading', { name: /profile settings/i })).toBeInTheDocument();
+  });
+
+  it('shows placeholder text', () => {
+    render(<ProfileSettingsPage />);
+
+    expect(screen.getByText(/manage your profile information/i)).toBeInTheDocument();
+  });
+});

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

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+/**
+ * Tests for Sessions Page
+ * Smoke tests for placeholder page
+ */
+
+import { render, screen } from '@testing-library/react';
+import SessionsPage from '@/app/(authenticated)/settings/sessions/page';
+
+describe('SessionsPage', () => {
+  it('renders without crashing', () => {
+    render(<SessionsPage />);
+    expect(screen.getByText('Active Sessions')).toBeInTheDocument();
+  });
+
+  it('renders heading', () => {
+    render(<SessionsPage />);
+
+    expect(screen.getByRole('heading', { name: /active sessions/i })).toBeInTheDocument();
+  });
+
+  it('shows placeholder text', () => {
+    render(<SessionsPage />);
+
+    expect(screen.getByText(/manage your active sessions/i)).toBeInTheDocument();
+  });
+});

frontend/tests/app/page.test.tsx

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+/**
+ * Tests for Home Page
+ * Smoke tests for static content
+ */
+
+import { render, screen } from '@testing-library/react';
+import Home from '@/app/page';
+
+// Mock Next.js Image component
+jest.mock('next/image', () => ({
+  __esModule: true,
+  default: (props: any) => {
+    // eslint-disable-next-line @next/next/no-img-element, jsx-a11y/alt-text
+    return <img {...props} />;
+  },
+}));
+
+describe('HomePage', () => {
+  it('renders without crashing', () => {
+    render(<Home />);
+    expect(screen.getByText(/get started by editing/i)).toBeInTheDocument();
+  });
+
+  it('renders Next.js logo', () => {
+    render(<Home />);
+
+    const logo = screen.getByAltText('Next.js logo');
+    expect(logo).toBeInTheDocument();
+    expect(logo).toHaveAttribute('src', '/next.svg');
+  });
+
+  it('renders Vercel logo', () => {
+    render(<Home />);
+
+    const logo = screen.getByAltText('Vercel logomark');
+    expect(logo).toBeInTheDocument();
+    expect(logo).toHaveAttribute('src', '/vercel.svg');
+  });
+
+  it('has correct external links', () => {
+    render(<Home />);
+
+    const deployLink = screen.getByRole('link', { name: /deploy now/i });
+    expect(deployLink).toHaveAttribute('href', expect.stringContaining('vercel.com'));
+    expect(deployLink).toHaveAttribute('target', '_blank');
+    expect(deployLink).toHaveAttribute('rel', 'noopener noreferrer');
+
+    const docsLink = screen.getByRole('link', { name: /read our docs/i });
+    expect(docsLink).toHaveAttribute('href', expect.stringContaining('nextjs.org/docs'));
+    expect(docsLink).toHaveAttribute('target', '_blank');
+  });
+
+  it('renders footer links', () => {
+    render(<Home />);
+
+    expect(screen.getByRole('link', { name: /learn/i })).toBeInTheDocument();
+    expect(screen.getByRole('link', { name: /examples/i })).toBeInTheDocument();
+    expect(screen.getByRole('link', { name: /go to nextjs\.org/i })).toBeInTheDocument();
+  });
+
+  it('has accessible image alt texts', () => {
+    render(<Home />);
+
+    expect(screen.getByAltText('Next.js logo')).toBeInTheDocument();
+    expect(screen.getByAltText('Vercel logomark')).toBeInTheDocument();
+    expect(screen.getByAltText('File icon')).toBeInTheDocument();
+    expect(screen.getByAltText('Window icon')).toBeInTheDocument();
+    expect(screen.getByAltText('Globe icon')).toBeInTheDocument();
+  });
+});

frontend/tests/app/providers.test.tsx

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+/**
+ * Tests for Providers Component
+ * Verifies React Query and Theme providers are configured correctly
+ */
+
+import { render, screen } from '@testing-library/react';
+import { Providers } from '@/app/providers';
+
+// Mock components
+jest.mock('@/components/theme', () => ({
+  ThemeProvider: ({ children }: { children: React.ReactNode }) => (
+    <div data-testid="theme-provider">{children}</div>
+  ),
+}));
+
+jest.mock('@/components/auth', () => ({
+  AuthInitializer: () => <div data-testid="auth-initializer" />,
+}));
+
+// Mock TanStack Query
+jest.mock('@tanstack/react-query', () => ({
+  QueryClient: jest.fn().mockImplementation(() => ({})),
+  QueryClientProvider: ({ children }: { children: React.ReactNode }) => (
+    <div data-testid="query-provider">{children}</div>
+  ),
+}));
+
+describe('Providers', () => {
+  it('renders without crashing', () => {
+    render(
+      <Providers>
+        <div>Test Content</div>
+      </Providers>
+    );
+
+    expect(screen.getByText('Test Content')).toBeInTheDocument();
+  });
+
+  it('wraps children with ThemeProvider', () => {
+    render(
+      <Providers>
+        <div>Test Content</div>
+      </Providers>
+    );
+
+    expect(screen.getByTestId('theme-provider')).toBeInTheDocument();
+  });
+
+  it('wraps children with QueryClientProvider', () => {
+    render(
+      <Providers>
+        <div>Test Content</div>
+      </Providers>
+    );
+
+    expect(screen.getByTestId('query-provider')).toBeInTheDocument();
+  });
+
+  it('renders AuthInitializer', () => {
+    render(
+      <Providers>
+        <div>Test Content</div>
+      </Providers>
+    );
+
+    expect(screen.getByTestId('auth-initializer')).toBeInTheDocument();
+  });
+
+  it('renders children', () => {
+    render(
+      <Providers>
+        <div data-testid="test-child">Child Component</div>
+      </Providers>
+    );
+
+    expect(screen.getByTestId('test-child')).toBeInTheDocument();
+    expect(screen.getByText('Child Component')).toBeInTheDocument();
+  });
+});