Initial commit - SoundWave v1.0
- Full PWA support with offline capabilities - Comprehensive search across songs, playlists, and channels - Offline playlist manager with download tracking - Pre-built frontend for zero-build deployment - Docker-based deployment with docker compose - Material-UI dark theme interface - YouTube audio download and management - Multi-user authentication support
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docs/PWA_IMPLEMENTATION.md
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# SoundWave PWA Implementation
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## Overview
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SoundWave is now a fully-featured Progressive Web App (PWA) with offline capabilities, installability, and native app-like experience.
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## Features Implemented
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### 1. **Service Worker**
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- **Location**: `frontend/public/service-worker.js`
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- **Caching Strategies**:
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- **Network First**: API requests, HTML pages (with cache fallback)
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- **Cache First**: Audio files, images (with network fallback)
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- **Stale While Revalidate**: JS/CSS static assets
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- **Background Sync**: Pending uploads and favorites sync when online
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- **Push Notifications**: Support for push notifications
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- **Cache Management**: Separate caches for static, API, audio, and images
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### 2. **Web App Manifest**
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- **Location**: `frontend/public/manifest.json`
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- **Features**:
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- App metadata (name, description, icons)
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- Display mode: `standalone` (native app-like)
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- Theme colors and background
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- App shortcuts (Home, Search, Library, Local Files)
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- Share target (share audio files to app)
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- Icon sizes: 72px to 512px
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- Screenshots for app stores
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### 3. **PWA Manager**
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- **Location**: `frontend/src/utils/pwa.ts`
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- **Capabilities**:
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- Service worker registration
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- Install prompt handling
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- Update management
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- Cache control
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- Notification permissions
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- Online/offline detection
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- Cache size estimation
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### 4. **PWA Context Provider**
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- **Location**: `frontend/src/context/PWAContext.tsx`
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- **Global State**:
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- Online/offline status
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- Installation state
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- Update availability
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- Cache size
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- Notification permissions
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### 5. **UI Components**
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#### PWA Prompts (`PWAPrompts.tsx`)
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- Offline alert (persistent)
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- Back online notification
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- Install app prompt (delayed 3s)
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- Update available prompt
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- Visual online/offline indicator
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#### PWA Settings Card (`PWASettingsCard.tsx`)
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- Connection status display
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- Install app button
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- Update app button
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- Cache management (size display, clear cache)
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- Notification toggle
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- PWA features list
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#### Splash Screen (`SplashScreen.tsx`)
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- Loading screen for PWA startup
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- App logo and branding
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### 6. **PWA-Specific Styles**
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- **Location**: `frontend/src/styles/pwa.css`
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- **Optimizations**:
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- Touch target sizes (44x44px minimum)
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- Touch feedback animations
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- Safe area insets for notched devices
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- iOS scrolling optimizations
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- Prevent zoom on input focus
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- Loading skeletons
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- Responsive utilities
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- Dark mode support
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- Reduced motion support
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- High contrast mode
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- Landscape orientation adjustments
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### 7. **Media Session API**
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- **Location**: `frontend/src/utils/mediaSession.ts`
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- **Features**:
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- Media controls in notification tray
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- Lock screen controls
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- Playback state management
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- Position state for seek bar
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- Metadata display (title, artist, album, artwork)
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### 8. **Offline Storage**
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- **Location**: `frontend/src/utils/offlineStorage.ts`
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- **IndexedDB Stores**:
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- Audio queue
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- Favorites
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- Playlists
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- Settings
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- Pending uploads
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- **Background sync** for offline actions
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### 9. **Enhanced HTML**
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- **Location**: `frontend/index.html`
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- **Meta Tags**:
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- PWA meta tags
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- Apple mobile web app capable
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- Theme color
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- Open Graph tags
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- Twitter cards
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- Multiple icon sizes
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- Manifest link
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## How to Use
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### For Users
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#### Install the App
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1. **Desktop (Chrome/Edge)**:
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- Click the install icon in the address bar
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- Or click "Install App" button in Settings > PWA
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2. **Mobile (Chrome/Safari)**:
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- Tap the "Add to Home Screen" prompt
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- Or use browser menu > "Add to Home Screen"
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#### Offline Usage
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- Previously viewed content is cached automatically
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- Audio files can be cached for offline playback
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- App works offline with cached data
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- Changes sync when connection is restored
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#### Update the App
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- Notification appears when update is available
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- Click "Update" to install new version
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- App reloads with latest features
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### For Developers
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#### Test PWA Locally
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```bash
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cd frontend
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npm run build
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npm run preview
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```
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#### Generate PWA Icons
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1. Use [PWA Builder Image Generator](https://www.pwabuilder.com/imageGenerator)
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2. Upload a 512x512 PNG logo
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3. Download generated icons
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4. Place in `frontend/public/img/`
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Required sizes:
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- 72x72, 96x96, 128x128, 144x144
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- 152x152, 192x192, 384x384, 512x512
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#### Test Service Worker
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```javascript
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// In browser console
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navigator.serviceWorker.ready.then(registration => {
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console.log('Service Worker registered:', registration);
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});
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// Check cache
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caches.keys().then(keys => console.log('Cache keys:', keys));
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```
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#### Debug Offline Mode
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1. Open DevTools > Application > Service Workers
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2. Check "Offline" checkbox
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3. Reload page to test offline functionality
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## Browser Support
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### Desktop
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- ✅ Chrome 80+
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- ✅ Edge 80+
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- ✅ Firefox 90+
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- ⚠️ Safari 15+ (limited features)
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### Mobile
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- ✅ Chrome Android 80+
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- ✅ Safari iOS 15+
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- ✅ Samsung Internet 12+
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## Features by Platform
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### All Platforms
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- ✅ Offline caching
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- ✅ Install to home screen
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- ✅ Push notifications
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- ✅ Background sync
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### Desktop Only
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- ✅ Window controls overlay
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- ✅ App shortcuts in taskbar
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- ✅ Badge API
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### Mobile Only
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- ✅ Share target API
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- ✅ Media session API
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- ✅ Safe area insets
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## Performance Optimizations
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### Code Splitting
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- Vendor bundle (React, React DOM, React Router)
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- MUI bundle (@mui/material, @mui/icons-material)
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- Lazy loading for routes
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### Caching Strategy
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- Static assets: Stale-while-revalidate
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- API: Network-first with cache fallback
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- Audio: Cache-first with network fallback
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- Images: Cache-first with network fallback
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### Bundle Size
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- Service worker: ~12KB
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- PWA utilities: ~8KB
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- Total overhead: ~20KB
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## Security Considerations
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### HTTPS Required
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PWA features require HTTPS in production. Service workers only work on:
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- `https://` domains
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- `localhost` (for development)
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### Content Security Policy
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Update CSP headers to allow:
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- Service worker scripts
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- Manifest file
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- Media files
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### Cache Invalidation
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Caches are versioned and automatically cleaned up on service worker update.
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## Troubleshooting
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### Service Worker Not Registering
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1. Check browser console for errors
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2. Verify HTTPS or localhost
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3. Check service worker file path
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4. Clear browser cache
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### Install Prompt Not Showing
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1. Must be served over HTTPS
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2. User hasn't installed before
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3. User hasn't dismissed recently
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4. All PWA criteria must be met
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### Offline Content Not Loading
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1. Check service worker is active
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2. Verify content was cached
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3. Check cache names in DevTools
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4. Test network conditions
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### Update Not Applying
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1. Close all tabs
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2. Clear service worker in DevTools
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3. Hard refresh (Ctrl+Shift+R)
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4. Reinstall the app
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## Next Steps
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1. **Generate Production Icons**
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- Create high-quality 512x512 app icon
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- Generate all required sizes
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- Add to `public/img/` directory
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2. **Configure Push Notifications**
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- Set up push notification server
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- Add VAPID keys
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- Implement backend push endpoint
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3. **Test on Real Devices**
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- Test install flow on iOS/Android
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- Verify offline functionality
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- Check media controls
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4. **Monitor Performance**
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- Use Lighthouse PWA audit
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- Track cache hit rates
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- Monitor service worker updates
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5. **App Store Submission**
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- Package as TWA (Android)
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- Submit to Google Play Store
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- Consider iOS App Store (limited)
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## Resources
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- [PWA Builder](https://www.pwabuilder.com/)
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- [Web.dev PWA Guide](https://web.dev/progressive-web-apps/)
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- [MDN Service Worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API)
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- [Workbox (Google)](https://developers.google.com/web/tools/workbox)
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