Nice work, I've downloaded the app and tested it out it does work well. But you mentioned performance as a feature - not sure how you can claim that when it requires a browser to render the GUI?
We try to do most of the heavy lifting in Rust in the backend and we only lazy load what is needed in the frontend. We found this is a good compromise that allows us to move faster on a multiplatform UI while not consuming too much resources. The backend will run on any cheap VPS perfectly well.