perf: Tracker for multi-page scroll animation

Just a tracker to check performance of scrolling in multi page mode.
Did a test with:
- multi page view:

<img width="1575" height="818" alt="Image" src="https://github.com/user-attachments/assets/f5589ff4-0a05-484d-a710-a9c3780c6bd9" />

- compare view

<img width="1575" height="818" alt="Image" src="https://github.com/user-attachments/assets/6d5c04e8-549b-448a-94b5-25aef577b093" />