MisuriTakahashi/ClinicCapstone-SY-2026-2027 ? reverse-engineered prompt

Build me a simple Java desktop app for a clinic that lets staff manage user accounts and basic clinic data in one place.

I want it to feel like a real small office system, with a clean light and dark theme, a login screen, and a few simple screens for working with records. It should use the existing accounts data, save and load things from files, and be easy to run in NetBeans without a lot of setup.

Please keep the interface straightforward and polished, since this is for a school capstone project. If anything is unclear from the project files, use sensible defaults and look up current docs online if you need to. I mainly want something that works well, looks good, and is easy to extend later.