If I understand correctly you want to make something like static screens for nostr, without any logic behind, like pulling notes and sending but you'd have screens that renders notes and a screen for postings.

Given all of that adding the actual logic should not be hard. You just need to make sure your code will handle that with ease.

Maybe you want to create something like a UI library for nostr, which people could extend and build clients with and add their custom logic. So it would be similar to ant design or material UI, where all components for building an app are ready and the developers can just assemble them together however they want and add whatever logic they need.

Hope this helps