Why not just use Flutter with Rust, via the flutter_rust_bridge (https://cjycode.com/flutter_rust_bridge/quickstart)? Seems like a reasonable combo to me.

To me it felt like it will break if I look at the code from down to up instead of up to down. And then I have to recompile flutter, the bridge and nuke the whole rust package folder to make sure it's clear and in workable state, then find other projects are now broke.

I joke, but probably rustdesk is so glued together, it created that bad impression on me.