izumicancode/Secure-Line ? reverse-engineered prompt

Build me a desktop chat app for people on the same local network that works with no server, no accounts online, and no cloud.

I want it to automatically find other devices on the WiFi or LAN, let me pick a callsign and password on first launch, and then let me send encrypted direct messages and private channels. Messages should be end to end encrypted, with a fresh key for each message, and local chat history should be saved encrypted on disk by default, with an option to keep everything temporary instead. It should also support sending files and folders in chats, show who is nearby, let me favorite people, verify a contact with a short safety number, and have a panic wipe that deletes my local identity and history.

Make it feel like a real modern chat app with a dark interface, chat bubbles, channels on the side, and simple join and leave flows. If you need current library details or best practices, look them up online first.