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/(authenticated)/settings/sessions/page.test.tsx

@@ -0,0 +1,26 @@
+/**
+ * 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();
+  });
+});