Built out all requested features from top to bottom:
✅ Upload Modal for Hero Images:
- Created UploadImageModal component with drag-and-drop
- Support for both URL input and file upload
- Live preview and validation
- Integrated into collection detail page
✅ Smart TCG Tags:
- Dynamic tags showing only games with cards
- Properly positioned under description
- Clean blue rounded styling
✅ Combined Share & Invite Modal:
- Unified ShareModal replacing separate buttons
- Public access toggle with community visibility
- Email/member search functionality
- Default viewer role for invitations
- Social sharing (Twitter, Facebook, Reddit, Discord)
- User search API endpoint (/api/users/search)
✅ Comprehensive Favorites System:
- Database schema for cards, collections, and decks
- API endpoint (/api/favorites) for CRUD operations
- Real-time favorite status checking
- Working toggle functionality in UI
- Migration script for database setup
✅ CSV Download Functionality:
- Complete card metadata export
- Proper CSV formatting with escaping
- All card fields included (name, set, rarity, etc.)
- Automatic filename generation
- Client-side download implementation
🎯 UI/UX Improvements:
- Removed duplicate buttons and switches
- Clean action bar with proper hierarchy
- Working modals with proper state management
- Error handling and loading states
🛠️ Technical Features:
- JWT authentication for all endpoints
- Proper database relationships and indexes
- CORS headers and error handling
- Optimized queries and performance
All todos completed! Ready for full collection management! 🎮✨