f9ine99/termus-melesu — reverse-engineered prompt

Build me Retra, a mobile friendly web app for Ethiopian small shops that sell soft drinks and beer in returnable glass bottles. I want it to work like a simple digital notebook where the shop owner can record who borrowed bottles, who returned them, deposits paid, and trusted customers who can take bottles on credit.

Make it installable on a phone like an app, usable offline, and able to sync when internet comes back. Add secure login, customer profiles, transaction history, daily and all time totals for borrowed and returned bottles, and a simple way to export the records to CSV. I also want a settings area where the owner can set a short PIN before deleting customers, transactions, or restoring data.

The design should feel modern and polished, with smooth animations, clean cards, floating notifications, and good performance even with lots of records. Include an AI summary page that can explain business trends and bottle loss using Groq if an API key is provided. Use the current docs online if you need to.