lakshaybhushan/nextjs-nvidia-chatbot ? reverse-engineered prompt

Build me a polished AI chat app template that feels modern and ready to deploy. It should let people pick from a few NVIDIA NIM text models, send messages in a clean chat interface, and stream replies back in real time so it feels fast and responsive.

I want the app to have a simple, nice looking UI with toast alerts, good mobile behavior, and a shareable open graph image for previews. Please include some basic protection so one person cannot spam too many requests from the same IP, since this will use a limited API key. Make the setup easy, with a clear place to add the NVIDIA NIM key and a smooth local dev experience.

If anything is unclear, look up the current docs online and wire it up in the most practical way.