gogarx/yandere-masonry ? reverse-engineered prompt

Build me a browser userscript and web version for Yande.re and Konachan that makes browsing much nicer.

I want the site to show Chinese tag translations, enlarge the thumbnail grid, and let me double click the left side or right side of the page to go to the previous or next page. Please also keep track of which post pages I have opened by marking visited items in the list.

The big feature should be a waterfall style browsing mode where I can search by tag, jump to favorites, popular, random posts, and pools, and switch between different layouts like masonry, grid, and justified. I should be able to click any image to see details, open the original page or source, view the full size image, download it, add it to a download list, and hide or show NSFW content.

If needed, look up current docs online so the implementation works cleanly. Also make sure it feels polished and usable on desktop.