Ravdesigns/flipbook ? reverse-engineered prompt

Build me a simple browser app that turns an A4 PDF or a folder of PNG or JPG pages into a realistic 3D flipbook.

I want to drag and drop files in, preview the pages, reorder or trim them, choose a few settings like book or single page view, light or dark background, cover on or off, and whether the page flip sound is on. Then I want one click to export a single self contained HTML file that I can email or AirDrop and open offline with no setup. If it’s not too much, also let me record a short flip through video for sharing online.

Make it feel polished and easy to use, with a nice editorial look, smooth page turns, full screen viewing, and keyboard controls. The exported file should work on its own without needing any extra files or internet. If you need to look up current docs online, go for it.