What tools/methods do you use for rapid web prototyping?

Since I have a lot of time and ideas on my hands, I try to prototype my ideas as fast as possible because I don't want to forget the inspiration that caused them.

What are your tools for backend/frontend/database design?

My current methods are: - live-reload on both backend and frontend - dividing work days into backend+db/frontend only - LLM prompting for small tasks/snippets

For stack related advice, my current stack is: - backend: Python(Flask) - frontend: JS/Bootstrap - db: sqlite