feat: v1.0.0 release - smooth scrolling, live editor, focus mode

- Ultra-smooth 60fps scrolling with SwiftUI animation
- Default speed 10 pixels/second
- Live text sync from editor to prompter
- Throttled UI updates to prevent freezes
- Background saves for performance
- Focus mode with gradient mask
- Interactive hotkey recorder
- Voice-follow mode improvements
- All files added to Xcode project
- Release build ready for App Store