phsl / new-api

This commit improves the ChannelsTable component with enhanced UI and functionality:

UI Improvements:
- Refactor operation column layout with primary actions exposed
- Move secondary actions (delete, copy) to dropdown menu
- Unify button styles with theme='light' and size="small"
- Add !rounded-full design to all buttons
- Add appropriate icons (IconStop, IconPlay etc.)

Column Settings Modal:
- Replace inline styles with Tailwind CSS
- Add rounded corners design
- Optimize button layout and styling
- Improve responsive design

Batch Operations:
- Unify dropdown button styles with !rounded-full
- Replace inline styles with Tailwind w-full
- Maintain semantic button types (warning/secondary/danger)
- Improve visual hierarchy

Model Testing Enhancement:
- Add comprehensive model testing modal
- Implement batch testing functionality
- Add model search and filtering
- Add real-time test status indicators
- Show response time for successful tests
- Add test queue management system
- Implement graceful test cancellation

Other Improvements:
- Optimize responsive layout for mobile devices
- Add i18n support for all new features
- Improve error handling and user feedback
- Enhance performance with optimized state management