I like it. I wonder if this is available for Windows?

The title invites us to talk about the tech stack, so I'll do:

The better tech for an app like this would certainly be Qt with C++. OP mentioned that this is a project for learning Rust which is perfectly fine. However, if the goal was to build the best possible product in the most efficient way, just use Qt and C++. At my job we've build many Qt apps and they don't explode with memory leaks and race conditions (unlike many Rust evangelists keep praying). And also they don't became an unmaintainable mess. Rust is great and all, but if you need a cross-plattform UI that is not Electron just use Qt with C++.