YanzYZ/kolawa-topup ? reverse-engineered prompt

Build me a simple top up website for Kolawa that lets people enter what they want to top up, send the request, and get a clear success or error message.

I want a clean public page that feels easy to use on mobile, plus the backend needed to handle the request and keep the logic separated cleanly. If there’s anything unclear in the current setup, check the existing code first and look up current docs online if you need to.

Please make it feel finished, with basic validation, friendly messages, and a straightforward flow from filling out the form to seeing the result. Keep the design simple and modern, and make sure it’s ready to deploy as a small web app.