xtohadi-tech/hc-termminal — reverse-engineered prompt

Build me a simple installable web app that feels like a clean terminal in the browser. I want it to open fast, work as a single page, and have a dark command line style screen where someone can type commands and see responses. Keep it lightweight and easy to understand, with the main app in plain HTML, CSS, and JavaScript.

Make it feel like a small personal terminal tool, not a full developer IDE. Add basic commands like help, clear, about, and maybe a few sample commands that show friendly text. It should look good on mobile and desktop, and it should be installable on a phone or computer with an app icon and offline support.

Please set up the web manifest, service worker, icons, and the main page so it can run as a basic progressive web app. Keep the code simple and tidy. Look up current browser docs online if you need to.