不存在的 Windows 93

Build a window manager where each window is an absolutely positioned element with a title bar; implement drag with pointer capture, z-index raising on focus, and resize handles. Store a tiny virtual file system as JSON in IndexedDB and render desktop icons from it. Register apps as functions that receive a content element. Use a bitmap pixel font, 1px bevel borders made with inset box-shadows, and short WebAudio blips for clicks to sell the era without copying any real OS assets.