tonyantony300/dashbeam ? reverse-engineered prompt

Build me a simple cross platform file transfer app that lets people send files or whole folders directly from one device to another without uploading anything to the cloud.

I want it to work on desktop and Android, with a web option too, and feel really easy, just drop a file, get a share code, and paste it on the other side to start the transfer. It should be private by default, with end to end encryption, no accounts, no tracking, and support very large files and resumable transfers. If two devices are paired, make sending even easier so people can pick a saved device instead of copying codes every time.

Make the experience clean and modern, and if you need current implementation details, look up the latest docs online first.