Devildonia/windows-app-center ? reverse-engineered prompt

Build me a browser based Windows 95 style desktop simulator that feels polished and fun to use.

I want a full fake desktop with a start menu, draggable and resizable windows, taskbar, system tray, and the ability to open a few built in apps like Notepad, Paint, File Explorer, Task Manager, and a simple command prompt. It should save files in a virtual file system, remember open windows when I refresh, and work offline like a small app I can install. Please make it support both a classic retro look and a cleaner modern Windows look, and let me switch themes easily.

If you can, include a playful 3D desktop pet or ragdoll that I can drag around, plus a sandbox area for small games or demos. The whole thing should feel like a real little operating system in the browser, not just a static mockup. Look up current docs online if you need to.