philleif/zine-arranger ? reverse-engineered prompt

Build me a simple web app that takes a multi page PDF and turns it into a printable zine layout in the browser.

I want it to support the common zine sizes, mini, quarter size, and half size, with options for portrait or landscape, single or double sided printing where that makes sense, and side fold or top fold. Let me choose the paper size too, like US Letter, A4, or a custom size.

The main goal is that I can upload a PDF, see the arranged pages laid out correctly for printing, and then use the browser print dialog to save or print the finished zine. It should make it easy to get the page order and folding right, and handle the page sizing well so the result is usable on real paper.

If you need to, look up current browser PDF handling or print behavior online, but keep the experience simple and lightweight.