Chatbot is not functional

<img width="1338" height="849" alt="Image" src="https://github.com/user-attachments/assets/0bd2d647-73a6-4ef4-845a-be05d25a8de5" />

Have to fix the chatbot, and make sure user's are able to select the model they want to interact with get a response. Also the response should include the paper as a base context.