Fix IndexTTS-2 emotion radar center dragging issues
Technical improvements:
- Add smart deadzone to prevent emotion switching near center point
- Fix center crossing bug where emotions bounced back when dragging past zero
- Implement directional projection only within deadzone for smooth transitions
- Add click counters for both center clicks and individual emotion label clicks
- Improve button text vertical centering in radar chart interface
diodiogod
243d8d3a09