PuneethReddyHC/POS-Inventory ? reverse-engineered prompt

Build me a full stack point of sale and inventory management app for a small retail business.

I want a clean dashboard where staff can manage products, categories, stock levels, customers, vendors, and sales all in one place. The app should let users create sales with line items, discounts, tax, and different payment types, then generate an invoice they can print or export as a PDF. It should also track stock movements, show low stock alerts, and keep a history of purchases, sales, returns, and adjustments.

Please include login and role based access for different staff types, plus a notifications area for important alerts like overdue payments or expiring products. I’d also like simple analytics charts for sales trends, top products, and inventory summaries. Make it responsive and easy to use, with a modern admin style interface. If you need current docs or best practices for any libraries, look them up online as you go.