Closes #50186

Before you mark this PR as ready for review, make sure that you have:
- [x] Added a solid test coverage and/or screenshots from doing manual
testing
- [x] Done a self-review taking into account security and performance
aspects
- [x] Aligned any UI changes with the [UI
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)

## Screenshots:
### Before:
<img width="2543" height="39" alt="image"
src="https://github.com/user-attachments/assets/5e9fb7c5-0ba6-44b5-a0f6-1f63b35550f6"
/>

### After:
<img width="1165" height="581" alt="image"
src="https://github.com/user-attachments/assets/903bc637-7d38-48c5-9207-30e12eaa40de"
/>

Release Notes:

- Fixed long diagnostic messages in the status bar pushing right-side
buttons (terminal, agent, etc.) off screen