Blockmap sync fix (#44743)

Release Notes:

- Improved display map rendering performance with many lines in the the multi-buffer.

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Co-authored-by: cameron <cameron.studdstreet@gmail.com>
Co-authored-by: Cole Miller <cole@zed.dev>
1446d84941Yara 🏳️‍⚧️ committed on 12/17/2025, 4:14:57 PM· committed by GitHubparent80aefbe
7 files changedLine totals unavailable