I think if you're going to push closer to the server in a client+server app, I'd probably look towards either HTMX integration options with a preferred backend (there's some cool C# integrations from Jetbrains as an example) or Astro over Next.js ...
That said, I'm not necessarily a big fan of mixed environments since IMO most web apps can be mostly client side and most websites can be mostly server driven. Either is simpler than the mingling tends to get. That's just my take though.
That said, I'm not necessarily a big fan of mixed environments since IMO most web apps can be mostly client side and most websites can be mostly server driven. Either is simpler than the mingling tends to get. That's just my take though.