nhubaotruong/usque-proxy ? reverse-engineered prompt

Build me a simple Kotlin app called usque proxy that lets me turn a proxy on and off and see whether it is running.

I want a clean, working first version with a basic screen, a couple of controls for starting and stopping the proxy, and a status area that shows what is happening. If there is any platform setup or current library guidance you need, please look it up online and use the latest docs.

Keep the experience straightforward and polished, with sensible defaults and clear messages if something goes wrong. If there are separate parts of the project for the app and the proxy logic, wire them together so the whole thing runs from one place and is easy to test.