Building a small business web app with logins and per-user data sounds like a UI problem until the backend rules start mattering. This is exactly where v0 and Zite diverge: v0 is fundamentally a frontend code generator, while Zite is a template-bounded app builder with database and permissions opinions baked into the platform.
That job exposes the failure modes that actually hurt. A polished screen is easy to demo, but user isolation, auth flows, database access, and change costs are what decide whether the app survives real use or turns into a cleanup project.