mckaywrigley/chatbot-ui ? reverse-engineered prompt

Build me a polished AI chat app like Chatbot UI that I can run myself.

I want people to be able to sign in, start new conversations, chat with different AI models, and see their message history saved properly. It should feel clean and modern, work well on desktop and mobile, and support connecting to common providers like OpenAI and local models through Ollama. Use Supabase for the backend, auth, and storing chats, and make it easy to set up with environment variables so I can plug in my own keys.

Please include the usual things a good chat app needs, like conversation management, a nice chat interface, settings for the connected model, and support for saving and loading past chats. If you need to check current docs for any setup details, go ahead and look them up online.