- Added IntersectionObserver to track component visibility.
- Paused requestAnimationFrame loop when component is not intersecting.
- Resumed loop when component becomes visible.
- Added unit tests to verify start/stop behavior.
Refactor useTypingEffect to use a single useEffect with proper cleanup for all timers, preventing state updates on unmounted components.
Add unit tests to verify behavior and ensure no memory leaks on unmount.
