vrund69/MERNPROJ ? reverse-engineered prompt

Build me a complete inventory management web app with separate admin, staff, and customer logins.

I want the admin and staff side to handle products, categories, suppliers, stock, purchase orders, sales orders, users, and reports. It should show a dashboard with live stats and charts, support adding and editing products with images, SKUs, and stock levels, and keep stock changes accurate so inventory never goes negative. Purchase orders should only affect stock when items are received, and sales orders should update stock when confirmed or restore it if canceled.

I also want a customer storefront where people can browse products, search and filter by category, add items to a cart, checkout, and view order history. Include registration, login, profile editing, password changes, role based access, notifications for low stock and new orders, and a clean responsive UI. If you need current library details, look up the latest docs online.