Fix project symbol picker UTF-8 highlight panic (#53485) (cherry-pick to preview)#53563
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This panic was caused because we incorrectly assumed that each character was one byte when converting character indices to highlight range byte indices. Self-Review Checklist: - [x] I've reviewed my own diff for quality, security, and reliability - [x] Unsafe blocks (if any) have justifying comments - [x] The content is consistent with the [UI/UX checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist) - [x] Tests cover the new/changed behavior - [x] Performance impact has been considered and is acceptable Closes #53479 Release Notes: - Fix a panic that could occur in the project symbol search picker --------- Co-authored-by: Lukas Wirth <lukas@zed.dev>
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Cherry-pick of #53485 to preview
This panic was caused because we incorrectly assumed that each character
was one byte when converting character indices to highlight range byte
indices.
Self-Review Checklist:
checklist
Closes #53479
Release Notes:
Co-authored-by: Lukas Wirth lukas@zed.dev