AuthForm enhancements:
- Add form-wide error display with dismiss functionality
- Add field-specific error styling with icons
- Auto-clear errors when user starts typing
- Enhanced accessibility with semantic announcements
- Better error positioning and visual hierarchy
AuthButton enhancements:
- Convert to StatefulWidget with animation support
- Add success state with visual feedback
- Enhanced loading states with custom text
- Double-tap prevention for better UX
- Haptic feedback on button press
- Comprehensive accessibility labels and hints
- Smooth visual transitions between states
- Better disabled state handling
- AuthButton widget with loading states and variants (primary, secondary, outline)
- AuthForm widget with email/password fields and real-time validation
- Password visibility toggle functionality
- Responsive design with proper accessibility labels
- Form validation for email format and password strength
Components ready for use in login/signup pages.