This PR changes the loading/generating indicator when in the "waiting
for tool call confirmation" state so that's a bit more visible and
discernible as needing your attention, as opposed to a regular
generating state.

<img width="400" alt="Screenshot 2025-11-05 at 10  46@2x"
src="https://github.com/user-attachments/assets/88adbf97-20fb-49c4-9c77-b0a3a22aa14e"
/>

Release Notes:

- agent: Improved the "waiting for confirmation" state visibility so
that you more rapidly know the agent is waiting for you to act.