Parchi: WhatsApp orders to bills for kirana stores, with Gemma 4 on the shop's own laptop

My Hacktoberfest Week 2 (Side Hustle) entry: Parchi turns WhatsApp orders like "bhaiya 2 kilo atta, 6 ande, ek maggi" into a checked bill, a WhatsApp reply and a UPI QR in about a second, with Gemma 4 running locally and plain code doing the money.