feat: Expand chat response width for wide monitors

[JKGeovision]

Hello,

I've noticed that on ultrawide monitors there is a significant amount of unused horizontal space in the question reply/chat response section. The content is centered and constrained to a narrow width, leaving large empty areas on both sides.

Increasing the available width would greatly improve the user experience on ultrawide monitors by making better use of the available screen real estate.

Thank you for your work and I wish you all a great day,
Joshua Krimmer

[tjbck]

Addressed with the latest main!