I thought this was about doing UI in rust, but it's just Javascript/react.
Also, in the demo screenshot, the margins of the agent/you labels feel off.
Also, in the demo screenshot, the margins of the agent/you labels feel off.
Borders are too round, labels are too close to the left side and also too close to the elements, font is too small, the color choice is weird.
Again, not some kind of design guru but something like this is definitely not something I would ever use just based on looking at the screenshot.