durgaprasad-4426/NEXUS ? reverse-engineered prompt

Build me a modern Flutter app called NEXUS that helps people learn DSA and stay consistent with their coding practice.

I want a dark, polished UI with a login flow, a main dashboard, and sections for learning topics, daily challenges, project ideas, video lessons, and a personal profile. The app should let users track what concepts they’ve finished, see their streaks and progress, and save a bit of local data so it feels persistent. It should also have a chatbot that can act like an AI mentor for DSA questions and study help. For the learning content, use cards and searchable lists, and make the project hub easy to browse by topic and difficulty.

Please wire it up so it can use online services for authentication, saved data, image uploads, and AI responses. Keep the app clean and responsive across mobile, web, and desktop, and use placeholder data where needed so I can run it right away. If anything needs current setup details, look up the latest docs online.