ep: Improve copy when showing edit predictions is disabled (#54926)

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 #54809

Release Notes:

- N/A or Added/Fixed/Improved ...
697f5dde3aBen Kunkle committed on 4/27/2026, 2:25:22 PM· committed by GitHubparentb42a6aa
1 file changedLine totals unavailable