Not everything needs to be an SPA. Separation of concerns is important but not always required.

I suppose I'll need to check my full stack privilege, but I just know starting a project like this eventually becomes someone else's tech debt nightmare.

If it wasn't already difficult enough to bootstrap a project especially these days. To any entrepreneurs reading, if this is the junk your devs come up with run away as fast as you can.

You might want to check out https://hypermedia.gallery

Disclosure: I built it (without HTMX).