suman913/E-Learning-LMS ? reverse-engineered prompt

Build me a learning platform where instructors can sign in, create courses, upload video lectures, add a free preview lecture, and publish or hide a course when they want.

Students should be able to browse all published courses, search and filter them, open a course page without logging in, watch the preview lesson, then pay securely to unlock the rest of the course. After payment, they should automatically get access to the course, see it in a My Learning area, and keep track of which lectures they have already watched. When they finish all lectures, mark the course as completed.

I also want profile editing with a profile picture, login and signup, and clear role based access so only the course owner can edit their own courses and lectures. Use a modern clean UI, make it responsive on desktop and mobile, and wire up Stripe payments, Cloudinary uploads, and a Node and Mongo backend. If you need to check current docs for any libraries, feel free to look them up online.