[Bug]: Dashboard LLM Chat Tab inconsistent formatting

[dot-agi]

🔎 Describe the Bug

1. Text is out of bounds of the chat window box
2. Roles other than System and User are rendered with different font

🤝 Contribution

• [ ] Yes, I'd be happy to submit a pull request with these changes.
• [ ] I need some guidance on how to contribute.
• [ ] I'd prefer the AgentOps team to handle this update.