shuklapunit27/YouTube-Playlist-Comparator ? reverse-engineered prompt

Build me a full stack app that lets students compare two YouTube playlists by pasting in the playlist links.

I want a clean dark, glassy interface where users can sign up and log in, then enter two playlist URLs and get a side by side comparison. Show useful stats like number of videos, total watch time, estimated time at faster playback speeds, views, likes, and an overall engagement style score. Also analyze the playlist titles to pull out the main topics, then use AI to tell me what the two playlists have in common, what is unique to each one, and give an overall similarity score.

If the playlists are clearly about different subjects, show a warning. Save each comparison so users can come back to a history page and delete old comparisons. Make it responsive and polished, and if you need current docs for the APIs or auth setup, look them up online.