No Context widget/Usage shown for claude agent sessions in Editor Window.

Testing #328645

I see context widget for regular claude agent sessions:

<img width="645" height="197" alt="Image" src="https://github.com/user-attachments/assets/183ae55c-a2ca-436d-87d5-f32e68232de3" />

Same for the usage hover after the latest turn:

<img width="636" height="91" alt="Image" src="https://github.com/user-attachments/assets/7f8dcbb7-7ee6-4385-9676-4e2a115eb1bf" />