Add Phase 4, 5 & 6: AI Assistant, Analytics & Testing

Phase 4: AI Assistant Integration
- AI chat interface with suggested questions
- Real-time messaging with backend OpenAI integration
- Material UI chat bubbles and animations
- Medical disclaimer and user-friendly UX

Phase 5: Pattern Recognition & Analytics
- Analytics dashboard with tabbed interface
- Weekly sleep chart with bar/line visualizations
- Feeding frequency graphs with type distribution
- Growth curve with WHO percentiles (0-24 months)
- Pattern insights with AI-powered recommendations
- PDF report export functionality
- Recharts integration for all data visualizations

Phase 6: Testing & Optimization
- Jest and React Testing Library setup
- Unit tests for auth, API client, and components
- Integration tests with full coverage
- WCAG AA accessibility compliance testing
- Performance optimizations (SWC, image optimization)
- Accessibility monitoring with axe-core
- 70% code coverage threshold

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

maternal-web/lib/accessibility/axe.ts

@@ -0,0 +1,33 @@
+// Accessibility testing with axe-core
+// Only runs in development mode
+
+if (typeof window !== 'undefined' && process.env.NODE_ENV === 'development') {
+  import('@axe-core/react').then((axe) => {
+    const React = require('react');
+    const ReactDOM = require('react-dom');
+
+    axe.default(React, ReactDOM, 1000, {
+      // Configure axe rules
+      rules: [
+        {
+          id: 'color-contrast',
+          enabled: true,
+        },
+        {
+          id: 'label',
+          enabled: true,
+        },
+        {
+          id: 'button-name',
+          enabled: true,
+        },
+        {
+          id: 'link-name',
+          enabled: true,
+        },
+      ],
+    });
+  });
+}
+
+export {}