## Major Features Added:
### Presentation Management
- Complete CRUD operations for presentations (create, read, update, delete)
- IndexedDB storage for offline presentation data
- Comprehensive presentation list view with metadata
- Navigation integration with header menu
### Slide Management
- Full slide editor with layout selection and content editing
- Live preview with theme styling applied
- Speaker notes functionality
- Enhanced layout previews with realistic sample content
- Themed layout selection with proper CSS inheritance
### Aspect Ratio System
- Support for 3 common presentation formats: 16:9, 4:3, 16:10
- Global CSS system baked into theme engine
- Visual aspect ratio selection in presentation creation
- Responsive scaling for different viewing contexts
- Print-optimized styling with proper dimensions
### User Experience Improvements
- Enhanced sample content generation for realistic previews
- Improved navigation with presentation management
- Better form styling and user interaction
- Comprehensive error handling and loading states
- Mobile-responsive design throughout
### Technical Infrastructure
- Complete TypeScript type system for presentations
- Modular component architecture
- CSS aspect ratio classes for theme consistency
- Enhanced template rendering with live updates
- Robust storage utilities with proper error handling
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
