UI/UX improvement: Add confirmation for "Clear History" button #3881

Hi LMSYS Team!

I really love using your platform, but there is one major issue with the UI layout. The "Clear History" button is placed in a way that makes it extremely easy to click by accident. I have accidentally wiped my entire chat history multiple times in a single day just by misclicking while scrolling.

Could you please consider adding one of the following safety measures:

1. A confirmation pop-up (e.g., "Are you sure you want to clear your history? Yes/Cancel").
2. Moving the "Clear History" button further away from the main chat controls or hiding it inside a sub-menu.

This small tweak would be a massive lifesaver for users with clumsy fingers!

Thank you for your amazing work!