agentailor/fullstack-langgraph-nextjs-agent ? reverse-engineered prompt

Build me a production ready AI agent web app with a clean chat interface where I can talk to an assistant in real time, see responses stream in, and keep separate conversation threads in a sidebar. I want the app to remember chats between sessions, save everything in a database, and let me switch between different AI models from the UI.

It should also support adding external tools through a settings screen, including local or remote tool servers, and before the assistant uses any tool I want a clear approval step where I can allow it, deny it, or tweak the request. Let me upload files like images, PDFs, and text files too, so the assistant can use them in the conversation.

Make it feel polished and modern, with a simple responsive layout, good error handling, and sensible defaults. If anything needs current setup details, look up the latest docs online and wire it up cleanly.