Implement comprehensive enhancements: push notifications, export functionality, user profiles, community sharing, offline improvements, analytics, accessibility, testing, and documentation

src/__tests__/Profile.test.tsx

@@ -0,0 +1,7 @@
+import { render, screen } from '@testing-library/react';
+import Profile from '../components/Profile';
+
+test('renders profile component', () => {
+  render(<Profile />);
+  expect(screen.getByText('Profile')).toBeInTheDocument();
+});