## Summary
Batch `getBoundingClientRect()` calls in `updateClipPath` via
`requestAnimationFrame` to avoid forced synchronous layout.
## Changes
- **What**: Wrap the layout-reading portion of `updateClipPath` in
`requestAnimationFrame()` with cancellation. Multiple rapid calls within
the same frame are coalesced into a single layout read. Eliminates
~1,053 forced synchronous layouts per profiling session.
## Review Focus
- `getBoundingClientRect()` forces synchronous layout. When interleaved
with style mutations (from PrimeVue `useStyle`, cursor writes, Vue VDOM
patching), this creates layout thrashing — especially in Firefox where
Stylo aggressively invalidates the entire style cache.
- The RAF wrapper coalesces all calls within a frame into one, reading
layout only once per frame. The `cancelAnimationFrame` ensures only the
latest parameters are used.
- `willChange: 'clip-path'` is included to hint the browser to optimize
clip-path animations.
## Stack
4 of 4 in Firefox perf fix stack. Depends on #9170.
<!-- Fixes #ISSUE_NUMBER -->
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9173-fix-batch-updateClipPath-via-requestAnimationFrame-3116d73d3650810392f7fba7ea5ceb6f)
by [Unito](https://www.unito.io)
* knip: Don't ignore exports that are only used within a given file
* knip: More pruning after rebase
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* knip: vitest plugin config
* knip: Playwright config, remove unnecessary ignores.
* knip: Simplify project file enumeration.
* knip: simplify the config file patterns ?(.optional_segment)
* knip: tailwind v4 fix
* knip: A little more, explain some of the deps.
Should be good for this PR.
* knip: remove unused disabling of classMembers.
It's opt-in, which we should probably do.
* knip: floating comments
We should probably delete _one_ of these parallell trees, right?
* knip: Add additional entrypoints
* knip: Restore UserData that's exposed via the types for now.
* knip: Add as an entry file even though knip says it's not necessary.
* knip: re-export functions used by nodes (h/t @christian-byrne)
