e2b-dev/fragments ? reverse-engineered prompt

Build me a web app like Claude Artifacts or v0 where I can chat with an AI and it turns my prompt into a real working app preview in the browser.

I want the AI to be able to generate code, run it safely in a sandbox, and show the result live with streaming updates while it works. It should support a few different app types like Python apps, Next.js apps, and simple data apps, and it should let the user pick a model from providers like OpenAI, Anthropic, Google, and other common options. If possible, make it easy to plug in new templates later, so I can add more starter app types without rewriting everything.

Please make it feel polished and modern, with a clean chat interface, a code preview area, and sensible defaults so someone can open it and start building right away. Look up current docs online if you need to.