ollama provider has unhelpful session names

<img width="1038" height="185" alt="Image" src="https://github.com/user-attachments/assets/e9f3ed12-f5a6-4a0e-b2ab-089c990add9d" />

I think could be simplified to not use the LLM to come up with a session name (just slows things down)