TUI is just a thinly disguised GUI. I mean it's pretty cool what they've done, but if it's effectively just an alternative graphical frontend (that happens to run in a terminal emulator), well I guess someone out there has a use case where they need to run this over an SSH session? Personally I find CLI ( not TUI) and/or client libraries a much more attractive proposition; otherwise a native application, that uses pr…
The only thing I think you're missing is that a browser is kind of a clunky dependency. It really wants you to use it for a certain kind of thing and although they can be tricked into doing other things, you and your users are always going to feel a bit of pressure to conform to the norms of the modern web. So if you're trying to avoid the mess that is the web these days, a TUI is really your whole "everything else"…
Lagrange (https://gmi.skyjake.fi/lagrange/) is a beautiful app that (despite my ideological purism in favoring more "native" solutions) I find perfectly usable and pleasant to use.