hoangsonww/DocuThinker-AI-App ? reverse-engineered prompt

Build me a polished web app where people can upload documents and instantly understand what they say.

I want users to sign in, drop in files like PDFs, Word docs, text, spreadsheets, JSON, and code files, then get a clean summary, key insights, and helpful follow up questions. After that they should be able to chat with the document like a smart assistant and see the original file side by side with the AI results. Make the upload flow feel smooth and modern, with clear progress from reading to analyzing to done.

Please include a nice dashboard, a history view for past documents, and responsive layouts that work well on desktop and mobile. Use a clean, friendly design and make the app feel fast and trustworthy. If you need current docs for any service or library, look them up online before wiring it up.