Martin-R-D/WebOS ? reverse-engineered prompt

Build me a browser based desktop OS that feels like a real little computer running inside the browser.

I want draggable, resizable windows with minimize, maximize, close, snapping, a taskbar, a start menu, right click menus, and a lock screen and boot screen when the page loads. The desktop should have movable icons, and files should work like a real file system with folders, rename, move, delete, and drag and drop between the desktop and file explorer. Please make it all persist locally so it still looks the same after refresh, but the open windows can reset each time.

Include a few built in apps like file explorer, text editor, terminal, calculator, paint, browser, clock, task manager, settings, sticky notes, and an about page. Make the text editor save files, the terminal support basic commands, the calculator handle real expressions, and paint let me draw and save images. Add dark, light, and midnight themes, sound effects, keyboard shortcuts, and make it feel polished and responsive.

If you need to check current docs for anything, look them up online.