santiagonieto09/Copiloto-RAG-Frontend ? reverse-engineered prompt

Build me a modern web app for a financial AI copilot with a chat interface that can answer questions using indexed documents and also work in a general chat mode. I want the app to let users upload PDF, TXT, and DOCX files, see the uploaded documents in a simple panel, and show the sources used by the RAG answers. The chat should feel polished, with streaming responses, Markdown formatting, and a clean message layout.

Please also add a light and dark theme that remembers the user’s choice, a clear status indicator for whether the backend is online, and simple feedback like toasts and confirmation dialogs for important actions. Make it responsive and professional, with a finance friendly look. It should connect to a backend API through a configurable base URL, and be ready to run locally and deploy easily. If you need to check current docs or best practices online, go ahead and do that.