unixabg/open-screen-monitor ? reverse-engineered prompt

Build me an open source screen monitoring app for Chrome with a PHP server and a Chrome extension.

I want it to let an admin connect managed Chrome devices to a central dashboard, sign in with Google, and monitor or manage what users are doing. It should support URL filtering, policy enforcement, and a simple way to block, allow, redirect, or notify when a site is visited. Make it possible to configure everything from a web admin page, including things like allowed email domains, whether classroom or roster syncing is on, and whether server side filtering is enabled.

I also need the extension and server to work together reliably, with a clear setup flow, debug logging for setup, and support for downloading the Google OAuth credentials into the data folder. Please make the default experience sensible for a school or organization, and include the important warnings about keeping the data folder private and using the update manifest URL for Chrome policy installs. If you need to check current Google docs or Chrome policy details, look them up online.