pasco-xai/my-awesome-chatbot ? reverse-engineered prompt

Build me a modern AI chatbot app that feels polished and easy to use.

I want users to be able to sign in, start new chats, keep their conversation history, and come back later to see past threads. It should use a clean chat interface with nice responsive styling, and support chatting with different AI models through one simple experience. If possible, let users switch between a few providers or model options without changing anything technical.

Please include saving chat data in a database, basic file storage for uploads if needed, and make the whole thing ready to deploy on Vercel. Use current best practices for a Next.js app, and make sure the UI is solid on desktop and mobile. If you need to look up current docs online for the AI and auth pieces, go ahead and do that.