drkNsubuga/PharmaSpot ? reverse-engineered prompt

Build me a pharmacy point of sale app for desktop that works cross platform and feels easy for staff to use in a busy shop.

It should let me sell items quickly with barcode scanning or product search, print clean receipts, manage products, categories, customers, and staff accounts with different permission levels. I also want basic stock tracking, low stock alerts, expiry date tracking, and a way to see open tabs, orders, and full transaction history with filters by cashier, till, status, and date range.

Please make the interface modern and simple, and include a central database setup so multiple computers on the same network can stay in sync. If you need to look up current docs online for anything, go ahead. Also include a few basic tests and make sure the app can be started and packaged cleanly.