- Add PhotoUpload component with drag-and-drop interface - Integrate exifr library for GPS and timestamp extraction - Implement file validation (type, size) - Add photo previews with metadata overlay - Support multiple photo uploads (max 5 files, 5MB each) - Display GPS indicators and extracted metadata - Create demo page for testing component - Satisfies requirements 1.2, 1.3, 1.4, 1.5, 8.3