- Add form-group wrappers and error message elements to HTML
- Implement comprehensive client-side validation for nickname and message inputs
- Add visual feedback using existing CSS validation classes
- Include success confirmation states and proper error handling
- Enhance accessibility with focus management and screen reader support
- Verified 44px minimum touch targets already in place
- Added swipe gesture support for mobile chat toggling
- Implemented pull-to-refresh functionality for mobile
- Added double-tap gesture for fullscreen toggle on video area
- All touch interactions are mobile-only to avoid desktop conflicts