From the title's "minimal web app", somehow I imagined a local/offline-first static site with a sprinkle of JavaScript, that fits in a single HTML file. Not sure I'd say Laravel with two databases is minimal, or the choice of React. Well I don't mean to criticize, just mentioning what I expected versus what it is, a solid full-stack application.
I like the minimal UI. On navigating the list, it takes a slight delay between clicking previous/next and for the list to update. The experience might be improved with a small loading indicator somewhere, or a fade transition, so the user can see it's doing something instead of "freezing" for a moment.
But if I were to be honest, I wouldn't want to depend on someone else's server for my radio listening needs, storing favorites, etc. At the least I'd want to export/import the data. It seems the app is not open source, so if one day the site was down or the domain gone, I'd lose my preferences.
There's a number of existing web radio players, like radio.garden, so what I probably want as a listener is a list of alternatives and feature comparison, to choose one based on my wishes. (Apparently many of them are called "internet radio".)
Anyway I upvoted because I like "Show HN" projects and respect that you built and shipped it. I imagine it's satisfying to make a useful tool exactly how you like it, and probably others will too.