karandhaodiyal28-hash/smart-canteen ? reverse-engineered prompt

Build me a smart canteen web app for college students and staff.

Students should be able to browse a menu, add items to a cart, book a token, and instantly get a QR code and token ID. After booking, show a clear 15 minute countdown before it expires, let people copy the token ID easily, and include a simple live poll and rush meter so they can see what’s trending and how busy the canteen is.

For staff, I want a hidden password protected admin dashboard where they can scan QR codes to verify orders, search orders quickly, and manage live, completed, and cancelled orders in real time. It should also support auto cancelling orders when the shop closes, basic announcements, sales charts, and exporting data to Excel. If it makes sense, include optional Google Sheets sync for push and pull updates.

Make it mobile friendly, clean, and fast, with a modern React feel. If you need current docs or a small helper library version, look it up online.