## Context
Sets the loading state for the Assistant's Notebook actions for CTA
button behaviour consistency - currently only gets disabled when
clicked.
<img width="281" height="155" alt="image"
src="https://github.com/user-attachments/assets/c65c267b-9eb4-4669-aae4-e81b574e880c"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Bug Fixes**
* The AI Assistant confirmation button now displays a loading state
while processing, while preserving its disabled behavior.
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