XIU2/UserScript ? reverse-engineered prompt

I want a Tampermonkey userscript collection that makes a bunch of websites feel cleaner and easier to use.

Please build it as a set of separate scripts, each one focused on one site or one small convenience feature. The main things I need are things like a simple dark mode for any site, a way to make forums and content sites less cluttered, auto load the next page when I scroll, open links in a new tab, remember a safer default volume for videos and audio, and fix specific annoyances on sites like GitHub, V2EX, Zhihu, Steam Workshop, DuckDuckGo, and some Chinese forums and file sites. Keep the scripts easy to install in Tampermonkey and write a clear README that explains what each script does and how to use it.

If you need to, look up current site behavior or docs online before implementing. Make it practical, lightweight, and usable right away.