safak/chatgpt-clone ? reverse-engineered prompt

Build me a clean ChatGPT style chat app starter in React.

I want a simple but polished interface with a conversation area, a message input at the bottom, send button, loading state, and a few starter messages so it feels real right away. Make it responsive for desktop and mobile, with a modern dark look that feels like an AI chat product. If it makes sense, add a sidebar for chat history or past conversations, but keep it simple and easy to use.

I mainly want the app wired up so I can type messages and see them appear in the thread, even if the assistant reply is just a basic mock response for now. Keep the code clean and easy to extend later for a real API. Use the existing Vite React setup and look up current docs online if you need to.