feat: change viewport css property value automatically when app metrics changed.

[andycall]

In this demo, the scrolling list with the red rectangle was styled using CSS viewport units: vh and vw. When the app metrics information changed (keyword popup), the list view's height was automatically updated.

https://github.com/user-attachments/assets/1cb5e9a5-e462-44d0-941a-f8e3a850a9f4

[jwxbond]

OK