- Create modern toast notification system replacing browser alerts
- Add mobile-responsive layouts with touch-friendly elements
- Implement loading states and progress indicators for all AJAX operations
- Add mobile navigation with collapsible menus
- Create enhanced form validation with inline error messages
- Add accessibility features (keyboard navigation, ARIA labels)
- Build comprehensive mobile testing suite
- Optimize for 320px to 1024px+ screen sizes
- Include progressive enhancement and fallback support
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Co-Authored-By: Claude <noreply@anthropic.com>
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