## Context
As per PR title - just disables the analyze button if the notebook is
empty
<img width="1077" height="323" alt="image"
src="https://github.com/user-attachments/assets/f8da8bd4-eb0c-43ae-85c7-b60c1c7dcfed"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Bug Fixes**
* Disabled the Analyze action for empty notebooks.
* Added guidance prompting users to add a cell before starting analysis.
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