I'm Rebuilding My Old Invoice App and This Time I Actually Know What I'm Doing

So I have this old project called Invoicepedia. Built it like 6 months ago when I was just starting to learn full stack. Next.js, Clerk, Neon, basic CRUD. The usual "I just learned how to connect a database" kind of project. I opened it recently and honestly it was rough. Delete button crashed the app sometimes. You could submit an empty invoice form with no validation. The Stripe integration was half working. I had both Drizzle and Prisma installed at the same time for some reason. Classic. I a