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)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #53115

Release Notes:

- Fixed terminal cursor blink not resetting when navigating with
action-bound keys (e.g., alt+left/right on macOS, alt+b/f on Linux)

## Demo

### Before the fix
The cursor stays invisible after word-jumping because the blink cycle
keeps going without resetting.


https://github.com/user-attachments/assets/00dbdba6-d793-4a23-abcc-37887f4d1262



### After the fix
The cursor shows up at the new position right after each word-jump, then
blinks again as expected.



https://github.com/user-attachments/assets/48d5906c-4899-4f4a-adbd-5908ebea0cfb