- Add collapsible troubleshooting section with device-specific instructions
- Detect iOS/iPhone and show specific Settings app instructions
- Detect Safari and show Safari-specific permission steps
- Show Chrome/general browser instructions for other browsers
- Include common issues and solutions
- Highlight manual check-in alternative
- Auto-detect user's device/browser for relevant instructions
- Add pre-check for camera devices to trigger permission prompt
- Add helpful info message explaining camera permission requirement
- Implement fallback to try default camera if facingMode constraint fails
- Better error messages for different camera access scenarios
- Log errors to console for debugging
- Handle NotAllowedError, NotFoundError, NotReadableError, OverconstrainedError
- Add manual check-in buttons for each attendee in the list
- Add manual QR code data input as fallback for camera issues
- Include clerkId in EventAttendee user object for proper check-in
- Improve camera error messages with helpful tips
- Fix TypeScript warnings
- Better UX for organizers with multiple check-in options
- Add UserQRCode component to display unique QR code on user profile
- Add QRCodeScanner component for mobile camera-based scanning
- Create EventCheckInPage for organizers to scan attendee QR codes
- Add backend endpoint POST /api/events/:id/checkin for check-in
- Add check-in button to EventDetailModal for organizers
- Install qrcode.react and html5-qrcode dependencies
- Implement real-time attendee list updates
- Add organizer permission validation
- Prevent duplicate check-ins
- Mobile-optimized with back camera support
