Add full photo capture and management functionality using standard Web APIs:
- Photo capture via getUserMedia (camera) or file upload
- Automatic thumbnail generation (max 200px width)
- IndexedDB storage for photos with Blob support
- PhotoCapture component with camera preview and capture controls
- PhotoGallery component with grid view and fullscreen modal
- Integration into item detail page
- 9 new unit tests (all passing)
PWA-friendly implementation:
- No native dependencies required
- Works in mobile browsers
- Falls back to file upload if camera unavailable
- Stores photos locally in IndexedDB
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
