Improve error message

Any message that has `->` in it is treated (in agent mode) as an auto error fix up. 

To replicate: 
1. Send this message `Hi ->`
2. Notice that it looks like this in the chat. 

<img width="564" height="222" alt="Image" src="https://github.com/user-attachments/assets/8f0e13f2-53a1-4513-95c6-a9dbb4820d30" />

 