fix#14433
#### PR Dependency Tree
* **PR #14442** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
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## Summary by CodeRabbit
* **New Features**
* Level-of-detail thumbnails for large images.
* Adaptive pacing for snapping, distribution and other alignment work.
* RAF coalescer utility to batch high-frequency updates.
* Operation timing utility to measure synchronous work.
* **Improvements**
* Batch group/ungroup reparenting that preserves element order and
selection.
* Coalesced panning and drag updates to reduce jitter.
* Connector/group indexing for more reliable updates, deletions and
sync.
* Throttled viewport refresh behavior.
* **Documentation**
* Docs added for RAF coalescer and measureOperation.
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