agent_ui: Clarify disabled profile selector copy (#53797)

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [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

After fix:


https://github.com/user-attachments/assets/7a9b7947-e222-4839-a46d-078b6aec8f18

Closes #53749

Release Notes:

- N/A

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Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
d5d6029a66Fuad Hasan committed on 4/13/2026, 11:51:05 AM· committed by GitHubparentbeb0b02
2 files changedLine totals unavailable