Add backend with analytics, notifications, and enhanced features

Backend:
- Complete NestJS backend implementation with comprehensive features
- Analytics: Weekly/monthly reports with PDF/CSV export
- Smart notifications: Persistent notifications with milestones and anomaly detection
- AI safety: Medical disclaimer triggers and prompt injection protection
- COPPA/GDPR compliance: Full audit logging system

Frontend:
- Updated settings page and analytics components
- API integration improvements

Docs:
- Added implementation gaps tracking
- Azure OpenAI integration documentation
- Testing and post-launch summaries

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

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

docs/mobile-app-best-practices.md

@@ -0,0 +1,975 @@
+# Mobile App Best Practices for Future Implementation
+## React Native Implementation Readiness Guide
+
+---
+
+## Overview
+
+This document outlines best practices, architectural patterns, and implementation guidelines for building the native mobile apps (iOS & Android) using React Native. The current web implementation provides a solid foundation that can be leveraged for the mobile apps.
+
+### Current Implementation Status
+- ✅ **Web App (maternal-web)**: Fully implemented with Next.js 14
+- ✅ **Backend API (maternal-app-backend)**: Complete with REST + WebSocket
+- ⏳ **Mobile Apps**: Not yet implemented (planned)
+
+### Technology Stack for Mobile
+
+```javascript
+{
+  "react-native": "^0.73.0",
+  "expo": "~50.0.0",
+  "@react-navigation/native": "^6.1.0",
+  "@react-navigation/stack": "^6.3.0",
+  "react-native-paper": "^5.12.0",
+  "redux-toolkit": "^2.0.0",
+  "react-native-reanimated": "^3.6.0",
+  "expo-secure-store": "~12.8.0",
+  "expo-notifications": "~0.27.0"
+}
+```
+
+---
+
+## Architecture Principles
+
+### 1. Code Reusability Between Web and Mobile
+
+**Shared Business Logic**
+```typescript
+// ✅ GOOD: Platform-agnostic business logic
+// libs/shared/src/services/activityService.ts
+export class ActivityService {
+  async logActivity(data: ActivityData): Promise<Activity> {
+    // Platform-independent logic
+    return this.apiClient.post('/activities', data);
+  }
+}
+
+// Can be used in both web and mobile
+```
+
+**Platform-Specific UI**
+```typescript
+// ❌ BAD: Mixing UI and logic
+function TrackingButton() {
+  const [activity, setActivity] = useState();
+  // Business logic mixed with UI
+}
+
+// ✅ GOOD: Separate concerns
+// hooks/useActivityTracking.ts
+export function useActivityTracking() {
+  // Reusable logic
+}
+
+// web/components/TrackingButton.tsx
+// mobile/components/TrackingButton.tsx
+// Different UI, same logic via hook
+```
+
+**Recommended Project Structure**
+```
+maternal-app-monorepo/
+├── apps/
+│   ├── web/                    # Next.js web app (existing)
+│   ├── mobile/                 # React Native mobile app (future)
+│   └── backend/                # NestJS API (existing)
+├── packages/
+│   ├── shared/                 # Shared between web & mobile
+│   │   ├── api-client/         # API communication
+│   │   ├── state/              # Redux store & slices
+│   │   ├── hooks/              # Custom React hooks
+│   │   ├── utils/              # Utilities
+│   │   └── types/              # TypeScript definitions
+│   ├── ui-components/          # Platform-specific UI
+│   │   ├── web/
+│   │   └── mobile/
+│   └── constants/              # Shared constants
+└── tools/                      # Build tools & scripts
+```
+
+---
+
+## Mobile-Specific Features
+
+### 1. Offline-First Architecture
+
+**Local Database: SQLite**
+```typescript
+// Mobile: Use SQLite for offline storage
+import * as SQLite from 'expo-sqlite';
+
+const db = SQLite.openDatabase('maternal.db');
+
+// Sync queue for offline operations
+interface SyncQueueItem {
+  id: string;
+  operation: 'CREATE' | 'UPDATE' | 'DELETE';
+  entity: 'activity' | 'child' | 'family';
+  data: any;
+  timestamp: Date;
+  retryCount: number;
+}
+
+// Auto-sync when connection restored
+export class OfflineSyncService {
+  async syncPendingChanges() {
+    const pendingItems = await this.getSyncQueue();
+
+    for (const item of pendingItems) {
+      try {
+        await this.syncItem(item);
+        await this.removefromQueue(item.id);
+      } catch (error) {
+        await this.incrementRetryCount(item.id);
+      }
+    }
+  }
+}
+```
+
+**Conflict Resolution**
+```typescript
+// Last-write-wins with timestamp comparison
+export class ConflictResolver {
+  resolve(local: Activity, remote: Activity): Activity {
+    const localTime = new Date(local.updatedAt);
+    const remoteTime = new Date(remote.updatedAt);
+
+    // Use latest version
+    return localTime > remoteTime ? local : remote;
+  }
+}
+```
+
+### 2. Push Notifications
+
+**Expo Notifications Setup**
+```typescript
+import * as Notifications from 'expo-notifications';
+import * as Device from 'expo-device';
+
+export class NotificationService {
+  async registerForPushNotifications() {
+    if (!Device.isDevice) {
+      return null;
+    }
+
+    const { status: existingStatus } =
+      await Notifications.getPermissionsAsync();
+
+    let finalStatus = existingStatus;
+
+    if (existingStatus !== 'granted') {
+      const { status } =
+        await Notifications.requestPermissionsAsync();
+      finalStatus = status;
+    }
+
+    if (finalStatus !== 'granted') {
+      return null;
+    }
+
+    const token = (
+      await Notifications.getExpoPushTokenAsync({
+        projectId: 'your-expo-project-id'
+      })
+    ).data;
+
+    // Send token to backend
+    await this.apiClient.post('/users/push-token', { token });
+
+    return token;
+  }
+
+  // Configure notification behavior
+  configureNotifications() {
+    Notifications.setNotificationHandler({
+      handleNotification: async () => ({
+        shouldShowAlert: true,
+        shouldPlaySound: true,
+        shouldSetBadge: true,
+      }),
+    });
+  }
+}
+```
+
+**Notification Categories**
+```typescript
+// Backend: Define notification types
+export enum NotificationType {
+  FAMILY_UPDATE = 'family_update',
+  ACTIVITY_REMINDER = 'activity_reminder',
+  MILESTONE_REACHED = 'milestone_reached',
+  AI_INSIGHT = 'ai_insight',
+  SYNC_COMPLETE = 'sync_complete',
+}
+
+// Mobile: Handle notification tap
+Notifications.addNotificationResponseReceivedListener(response => {
+  const { type, data } = response.notification.request.content;
+
+  switch (type) {
+    case NotificationType.FAMILY_UPDATE:
+      navigation.navigate('Family', { familyId: data.familyId });
+      break;
+    case NotificationType.ACTIVITY_REMINDER:
+      navigation.navigate('Track', { type: data.activityType });
+      break;
+    // ... handle other types
+  }
+});
+```
+
+### 3. Biometric Authentication
+
+**Face ID / Touch ID / Fingerprint**
+```typescript
+import * as LocalAuthentication from 'expo-local-authentication';
+import * as SecureStore from 'expo-secure-store';
+
+export class BiometricAuthService {
+  async isBiometricAvailable(): Promise<boolean> {
+    const compatible = await LocalAuthentication.hasHardwareAsync();
+    const enrolled = await LocalAuthentication.isEnrolledAsync();
+    return compatible && enrolled;
+  }
+
+  async authenticateWithBiometrics(): Promise<boolean> {
+    const result = await LocalAuthentication.authenticateAsync({
+      promptMessage: 'Authenticate to access Maternal App',
+      fallbackLabel: 'Use passcode',
+    });
+
+    return result.success;
+  }
+
+  async enableBiometricLogin(userId: string, token: string) {
+    // Store refresh token securely
+    await SecureStore.setItemAsync(
+      `auth_token_${userId}`,
+      token,
+      {
+        keychainAccessible:
+          SecureStore.WHEN_UNLOCKED_THIS_DEVICE_ONLY,
+      }
+    );
+
+    // Enable biometric flag
+    await SecureStore.setItemAsync(
+      'biometric_enabled',
+      'true'
+    );
+  }
+
+  async loginWithBiometrics(): Promise<string | null> {
+    const authenticated = await this.authenticateWithBiometrics();
+
+    if (!authenticated) {
+      return null;
+    }
+
+    // Retrieve stored token
+    const userId = await SecureStore.getItemAsync('current_user_id');
+    const token = await SecureStore.getItemAsync(`auth_token_${userId}`);
+
+    return token;
+  }
+}
+```
+
+### 4. Voice Input (Whisper)
+
+**React Native Voice**
+```typescript
+import Voice from '@react-native-voice/voice';
+
+export class VoiceInputService {
+  constructor() {
+    Voice.onSpeechResults = this.onSpeechResults;
+    Voice.onSpeechError = this.onSpeechError;
+  }
+
+  async startListening() {
+    try {
+      await Voice.start('en-US');
+    } catch (error) {
+      console.error('Voice start error:', error);
+    }
+  }
+
+  async stopListening() {
+    try {
+      await Voice.stop();
+    } catch (error) {
+      console.error('Voice stop error:', error);
+    }
+  }
+
+  onSpeechResults = (event: any) => {
+    const transcript = event.value[0];
+    // Send to backend for processing with Whisper
+    this.processTranscript(transcript);
+  };
+
+  onSpeechError = (event: any) => {
+    console.error('Speech error:', event.error);
+  };
+
+  async processTranscript(transcript: string) {
+    // Send to backend Whisper API
+    const response = await fetch('/api/v1/voice/transcribe', {
+      method: 'POST',
+      body: JSON.stringify({ transcript }),
+    });
+
+    const { activityData } = await response.json();
+    return activityData;
+  }
+}
+```
+
+### 5. Camera & Photo Upload
+
+**Expo Image Picker**
+```typescript
+import * as ImagePicker from 'expo-image-picker';
+
+export class PhotoService {
+  async requestPermissions() {
+    const { status } =
+      await ImagePicker.requestMediaLibraryPermissionsAsync();
+
+    if (status !== 'granted') {
+      Alert.alert(
+        'Permission needed',
+        'Please allow access to photos'
+      );
+      return false;
+    }
+
+    return true;
+  }
+
+  async pickImage() {
+    const hasPermission = await this.requestPermissions();
+    if (!hasPermission) return null;
+
+    const result = await ImagePicker.launchImageLibraryAsync({
+      mediaTypes: ImagePicker.MediaTypeOptions.Images,
+      allowsEditing: true,
+      aspect: [4, 3],
+      quality: 0.8,
+    });
+
+    if (!result.canceled) {
+      return result.assets[0].uri;
+    }
+
+    return null;
+  }
+
+  async takePhoto() {
+    const { status } =
+      await ImagePicker.requestCameraPermissionsAsync();
+
+    if (status !== 'granted') {
+      return null;
+    }
+
+    const result = await ImagePicker.launchCameraAsync({
+      allowsEditing: true,
+      aspect: [4, 3],
+      quality: 0.8,
+    });
+
+    if (!result.canceled) {
+      return result.assets[0].uri;
+    }
+
+    return null;
+  }
+
+  async uploadPhoto(uri: string, childId: string) {
+    const formData = new FormData();
+    formData.append('file', {
+      uri,
+      type: 'image/jpeg',
+      name: 'photo.jpg',
+    } as any);
+    formData.append('childId', childId);
+
+    const response = await fetch('/api/v1/children/photo', {
+      method: 'POST',
+      body: formData,
+      headers: {
+        'Content-Type': 'multipart/form-data',
+      },
+    });
+
+    return response.json();
+  }
+}
+```
+
+---
+
+## Performance Optimization
+
+### 1. List Virtualization
+
+**FlatList for Large Datasets**
+```typescript
+import { FlatList } from 'react-native';
+
+// ✅ GOOD: Virtualized list for activities
+<FlatList
+  data={activities}
+  renderItem={({ item }) => <ActivityCard activity={item} />}
+  keyExtractor={(item) => item.id}
+
+  // Performance optimizations
+  removeClippedSubviews={true}
+  maxToRenderPerBatch={10}
+  updateCellsBatchingPeriod={50}
+  initialNumToRender={10}
+  windowSize={5}
+
+  // Pull to refresh
+  onRefresh={handleRefresh}
+  refreshing={isRefreshing}
+
+  // Infinite scroll
+  onEndReached={loadMore}
+  onEndReachedThreshold={0.5}
+/>
+
+// ❌ BAD: Rendering all items at once
+{activities.map(activity => <ActivityCard key={activity.id} activity={activity} />)}
+```
+
+### 2. Image Optimization
+
+**React Native Fast Image**
+```typescript
+import FastImage from 'react-native-fast-image';
+
+// ✅ GOOD: Optimized image loading
+<FastImage
+  source={{
+    uri: childPhoto,
+    priority: FastImage.priority.high,
+    cache: FastImage.cacheControl.immutable,
+  }}
+  style={styles.childPhoto}
+  resizeMode={FastImage.resizeMode.cover}
+/>
+
+// Preload images for better UX
+FastImage.preload([
+  { uri: photo1 },
+  { uri: photo2 },
+]);
+```
+
+### 3. Animation Performance
+
+**React Native Reanimated 3**
+```typescript
+import Animated, {
+  useSharedValue,
+  useAnimatedStyle,
+  withSpring,
+} from 'react-native-reanimated';
+
+// ✅ GOOD: Run on UI thread
+function AnimatedButton() {
+  const scale = useSharedValue(1);
+
+  const animatedStyle = useAnimatedStyle(() => ({
+    transform: [{ scale: scale.value }],
+  }));
+
+  const handlePress = () => {
+    scale.value = withSpring(0.95, {}, () => {
+      scale.value = withSpring(1);
+    });
+  };
+
+  return (
+    <Animated.View style={animatedStyle}>
+      <TouchableOpacity onPress={handlePress}>
+        <Text>Track Activity</Text>
+      </TouchableOpacity>
+    </Animated.View>
+  );
+}
+```
+
+### 4. Bundle Size Optimization
+
+**Hermes Engine (for Android)**
+```javascript
+// android/app/build.gradle
+project.ext.react = [
+  enableHermes: true,  // Enable Hermes engine
+]
+
+// Results in:
+// - Faster startup time
+// - Lower memory usage
+// - Smaller APK size
+```
+
+**Code Splitting**
+```typescript
+// Lazy load heavy screens
+const AIAssistant = lazy(() => import('./screens/AIAssistant'));
+const Analytics = lazy(() => import('./screens/Analytics'));
+
+// Use with Suspense
+<Suspense fallback={<LoadingSpinner />}>
+  <AIAssistant />
+</Suspense>
+```
+
+---
+
+## Testing Strategy for Mobile
+
+### Unit Tests (Jest)
+```typescript
+import { renderHook, act } from '@testing-library/react-hooks';
+import { useActivityTracking } from './useActivityTracking';
+
+describe('useActivityTracking', () => {
+  it('should track activity successfully', async () => {
+    const { result } = renderHook(() => useActivityTracking());
+
+    await act(async () => {
+      await result.current.logActivity({
+        type: 'feeding',
+        childId: 'child_123',
+      });
+    });
+
+    expect(result.current.activities).toHaveLength(1);
+  });
+});
+```
+
+### Component Tests (React Native Testing Library)
+```typescript
+import { render, fireEvent } from '@testing-library/react-native';
+import { TrackingButton } from './TrackingButton';
+
+describe('TrackingButton', () => {
+  it('should handle press event', () => {
+    const onPress = jest.fn();
+    const { getByText } = render(
+      <TrackingButton onPress={onPress} />
+    );
+
+    fireEvent.press(getByText('Track Feeding'));
+    expect(onPress).toHaveBeenCalled();
+  });
+});
+```
+
+### E2E Tests (Detox)
+```typescript
+describe('Activity Tracking Flow', () => {
+  beforeAll(async () => {
+    await device.launchApp();
+  });
+
+  it('should log a feeding activity', async () => {
+    await element(by.id('track-feeding-btn')).tap();
+    await element(by.id('amount-input')).typeText('120');
+    await element(by.id('save-btn')).tap();
+
+    await expect(element(by.text('Activity saved'))).toBeVisible();
+  });
+});
+```
+
+---
+
+## Platform-Specific Considerations
+
+### iOS Specific
+
+**1. App Store Guidelines**
+```markdown
+- ✅ Submit privacy manifest (PrivacyInfo.xcprivacy)
+- ✅ Declare data collection practices
+- ✅ Request permissions with clear explanations
+- ✅ Support all device sizes (iPhone, iPad)
+- ✅ Dark mode support required
+```
+
+**2. iOS Permissions**
+```xml
+<!-- ios/maternal/Info.plist -->
+<key>NSCameraUsageDescription</key>
+<string>Take photos of your child's milestones</string>
+
+<key>NSPhotoLibraryUsageDescription</key>
+<string>Save and view photos of your child</string>
+
+<key>NSMicrophoneUsageDescription</key>
+<string>Use voice to log activities hands-free</string>
+
+<key>NSFaceIDUsageDescription</key>
+<string>Use Face ID for quick and secure login</string>
+```
+
+**3. iOS Background Modes**
+```xml
+<key>UIBackgroundModes</key>
+<array>
+  <string>remote-notification</string>
+  <string>fetch</string>
+</array>
+```
+
+### Android Specific
+
+**1. Permissions**
+```xml
+<!-- android/app/src/main/AndroidManifest.xml -->
+<uses-permission android:name="android.permission.CAMERA" />
+<uses-permission android:name="android.permission.RECORD_AUDIO" />
+<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+<uses-permission android:name="android.permission.USE_BIOMETRIC" />
+<uses-permission android:name="android.permission.USE_FINGERPRINT" />
+```
+
+**2. ProGuard (Code Obfuscation)**
+```
+# android/app/proguard-rules.pro
+-keep class com.maternalapp.** { *; }
+-keepclassmembers class * {
+  @com.facebook.react.uimanager.annotations.ReactProp <methods>;
+}
+```
+
+**3. App Signing**
+```bash
+# Generate release keystore
+keytool -genkeypair -v -storetype PKCS12 \
+  -keystore maternal-app-release.keystore \
+  -alias maternal-app \
+  -keyalg RSA -keysize 2048 \
+  -validity 10000
+```
+
+---
+
+## Deployment & Distribution
+
+### App Store (iOS)
+
+**1. Build Configuration**
+```bash
+# Install dependencies
+cd ios && pod install
+
+# Build for production
+xcodebuild -workspace MaternalApp.xcworkspace \
+  -scheme MaternalApp \
+  -configuration Release \
+  -archivePath MaternalApp.xcarchive \
+  archive
+
+# Export IPA
+xcodebuild -exportArchive \
+  -archivePath MaternalApp.xcarchive \
+  -exportPath ./build \
+  -exportOptionsPlist ExportOptions.plist
+```
+
+**2. TestFlight (Beta Testing)**
+```bash
+# Upload to TestFlight
+xcrun altool --upload-app \
+  --type ios \
+  --file MaternalApp.ipa \
+  --username "developer@example.com" \
+  --password "@keychain:AC_PASSWORD"
+```
+
+### Google Play (Android)
+
+**1. Build AAB (Android App Bundle)**
+```bash
+cd android
+./gradlew bundleRelease
+
+# Output: android/app/build/outputs/bundle/release/app-release.aab
+```
+
+**2. Internal Testing Track**
+```bash
+# Upload to Google Play Console
+# Use Fastlane or manual upload
+```
+
+### Over-the-Air Updates (CodePush)
+
+**Setup for rapid iteration**
+```bash
+# Install CodePush CLI
+npm install -g code-push-cli
+
+# Register app
+code-push app add maternal-app-ios ios react-native
+code-push app add maternal-app-android android react-native
+
+# Release update
+code-push release-react maternal-app-ios ios \
+  -d Production \
+  --description "Bug fixes and performance improvements"
+```
+
+**Rollback Strategy**
+```bash
+# Rollback to previous version if issues detected
+code-push rollback maternal-app-ios Production
+
+# Monitor adoption rate
+code-push deployment ls maternal-app-ios
+```
+
+---
+
+## Monitoring & Analytics
+
+### Crash Reporting (Sentry)
+```typescript
+import * as Sentry from '@sentry/react-native';
+
+Sentry.init({
+  dsn: 'YOUR_SENTRY_DSN',
+  environment: __DEV__ ? 'development' : 'production',
+  tracesSampleRate: 1.0,
+});
+
+// Automatic breadcrumbs
+Sentry.addBreadcrumb({
+  category: 'activity',
+  message: 'User logged feeding activity',
+  level: 'info',
+});
+
+// Custom error context
+Sentry.setContext('user', {
+  id: user.id,
+  familyId: family.id,
+});
+```
+
+### Performance Monitoring
+```typescript
+import * as Sentry from '@sentry/react-native';
+
+// Monitor screen load time
+const transaction = Sentry.startTransaction({
+  name: 'ActivityTrackingScreen',
+  op: 'navigation',
+});
+
+// ... screen loads ...
+
+transaction.finish();
+
+// Monitor specific operations
+const span = transaction.startChild({
+  op: 'api.call',
+  description: 'Log activity',
+});
+
+await logActivity(data);
+span.finish();
+```
+
+### Usage Analytics
+```typescript
+// Integrate with backend analytics service
+import { Analytics } from '@maternal/shared/analytics';
+
+Analytics.track('Activity Logged', {
+  type: 'feeding',
+  method: 'voice',
+  duration: 15000,
+});
+
+Analytics.screen('Activity Tracking');
+
+Analytics.identify(user.id, {
+  familySize: family.members.length,
+  childrenCount: children.length,
+  isPremium: subscription.isPremium,
+});
+```
+
+---
+
+## Accessibility (WCAG AA Compliance)
+
+### Screen Reader Support
+```typescript
+import { View, Text, TouchableOpacity } from 'react-native';
+
+<TouchableOpacity
+  accessible={true}
+  accessibilityLabel="Log feeding activity"
+  accessibilityHint="Opens feeding activity tracker"
+  accessibilityRole="button"
+  onPress={handlePress}
+>
+  <Text>Track Feeding</Text>
+</TouchableOpacity>
+```
+
+### Dynamic Font Sizes
+```typescript
+import { Text, useWindowDimensions } from 'react-native';
+
+// Respect user's font size preferences
+<Text
+  style={{
+    fontSize: 16,
+    lineHeight: 24,
+  }}
+  allowFontScaling={true}
+  maxFontSizeMultiplier={2}
+>
+  Activity logged successfully
+</Text>
+```
+
+### Color Contrast
+```typescript
+// Ensure WCAG AA compliance (4.5:1 ratio for normal text)
+const colors = {
+  primary: '#FF8B7D',      // Coral
+  primaryText: '#1A1A1A',  // Dark text on light background
+  background: '#FFFFFF',
+  textOnPrimary: '#FFFFFF', // White text on coral
+};
+
+// Validate contrast ratios in design system
+```
+
+---
+
+## Security Best Practices
+
+### Secure Storage
+```typescript
+import * as SecureStore from 'expo-secure-store';
+
+// ✅ GOOD: Encrypted storage for sensitive data
+await SecureStore.setItemAsync('auth_token', token);
+
+// ❌ BAD: AsyncStorage for sensitive data (unencrypted)
+await AsyncStorage.setItem('auth_token', token);
+```
+
+### Certificate Pinning
+```typescript
+// Prevent man-in-the-middle attacks
+import { configureCertificatePinning } from 'react-native-cert-pinner';
+
+await configureCertificatePinning([
+  {
+    hostname: 'api.maternalapp.com',
+    certificates: [
+      'sha256/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=',
+    ],
+  },
+]);
+```
+
+### Jailbreak/Root Detection
+```typescript
+import JailMonkey from 'jail-monkey';
+
+if (JailMonkey.isJailBroken()) {
+  Alert.alert(
+    'Security Warning',
+    'This app may not function properly on jailbroken devices'
+  );
+}
+```
+
+---
+
+## Migration Path from Web to Mobile
+
+### Phase 1: Extract Shared Logic
+```typescript
+// 1. Move business logic to shared package
+// packages/shared/src/services/
+export class ActivityService { ... }
+export class AIService { ... }
+
+// 2. Update web app to use shared package
+import { ActivityService } from '@maternal/shared';
+```
+
+### Phase 2: Build Mobile Shell
+```typescript
+// 1. Create React Native app with Expo
+npx create-expo-app maternal-mobile
+
+// 2. Set up navigation structure
+// 3. Integrate shared services
+// 4. Build basic UI with React Native Paper
+```
+
+### Phase 3: Implement Mobile-Specific Features
+```typescript
+// 1. Offline mode with SQLite
+// 2. Push notifications
+// 3. Biometric auth
+// 4. Voice input
+// 5. Camera integration
+```
+
+### Phase 4: Testing & Optimization
+```typescript
+// 1. Unit tests
+// 2. Component tests
+// 3. E2E tests with Detox
+// 4. Performance profiling
+// 5. Accessibility audit
+```
+
+### Phase 5: Beta Testing & Launch
+```typescript
+// 1. TestFlight (iOS)
+// 2. Google Play Internal Testing
+// 3. Gather feedback
+// 4. Iterate based on metrics
+// 5. Production launch
+```
+
+---
+
+## Conclusion
+
+This guide provides a comprehensive roadmap for implementing native mobile apps. Key takeaways:
+
+1. **Code Reusability**: Share business logic between web and mobile
+2. **Offline-First**: Essential for mobile UX
+3. **Native Features**: Leverage platform-specific capabilities
+4. **Performance**: Optimize for mobile constraints
+5. **Testing**: Comprehensive strategy for quality
+6. **Security**: Protect user data on mobile devices
+7. **Analytics**: Track usage and iterate
+
+The current web implementation already follows many mobile-friendly patterns, making the transition to React Native straightforward when the time comes.