hunvreus/pagescms ? reverse-engineered prompt

Build me a simple CMS for GitHub repositories where I can sign in, connect a repo, and edit content and media without leaving the app. It should feel especially useful for static sites and content driven projects, so I can manage pages, posts, and uploaded images right from my GitHub repo and have changes saved back cleanly.

I want a polished admin app with a clear content editor, file and media handling, and the basic setup needed to run it locally with a database and GitHub app connection. Please make it work as a real product, with authentication, repo access, settings, and a smooth editing experience. If you need to check current docs or APIs while building, go ahead and look them up.