muke1908/chat-e2ee — reverse-engineered prompt

Build me a simple private chat app where two people can open a temporary secure room without signing up or giving any personal info. One person should be able to create a chat, get a unique link or PIN, share it with someone else, then start messaging once the other person joins.

The important part is privacy. Messages should be end to end encrypted in the browser, with private keys staying on each person’s device. The server should only help connect the two people and relay encrypted data, not store chat history or anything that can be read later. When the chat is closed, the conversation should be gone.

Please include a lightweight web interface, a Node and Express backend, and realtime messaging with sockets. If possible, also add a basic one to one encrypted audio call feature, but treat it as experimental and make it clear if browser support is limited. Keep the app easy to run locally, with setup instructions and environment config.