I just vibe-coded TODOstr with 3 prompts and no code manually added or modified: https://github.com/rolznz/todostr
Which however is not one of your ideas, but contains the main nostr + lightning requirement (sign and post notes using alby extension, ability to zap people's notes).
(See my reasoning why I made a TODO app, mainly I was low on time and Memestr original request is a bit more complicated - mainly image generation and uploads, WoT)
This prompt is quite a good base though and could be modified and expanded to actually implement one of your initial ideas.
My workflow is committed, including my initial prompt idea, my refined prompt (much more detailed), and two follow-up prompts, and the entire AI conversation.