coderyash-ai/GemChat ? reverse-engineered prompt

Build me a polished AI chat app in a Jupyter notebook that uses Google Gemini and opens in the browser with Gradio.

I want it to feel like a friendly ChatGPT style companion, with streaming responses, a clean dark mode interface, and a few helpful suggested prompts so users can get started fast. It should keep the conversation history on screen, let me keep chatting naturally, and include a way to save chats so I can come back to them later. Make it responsive so it works nicely on both laptop and phone, and keep the experience simple enough that I can run the notebook, add my Gemini API key, and start chatting right away.

If anything is unclear, look up the current Gemini and Gradio docs online and wire it up in the simplest working way.