andreakone/decimen-optical-transfer ? reverse-engineered prompt

Build me a simple web app that lets one device send a file to another device using just a screen and a camera.

I want one page for sending and one page for receiving. On the sender side, the file should turn into a stream of animated QR codes that keeps playing until the transfer is done. On the receiver side, the phone camera should scan the codes, rebuild the file, and show the finished image once it’s complete. It should work with no app install, no pairing, and no direct connection between the devices.

Make it easy to run locally, and if the camera needs a secure page, set that up so it works on a phone. Add a small settings area so I can change things like file size, speed, and capture options without making it complicated. If you need to look up current browser or QR handling docs online, go ahead.