Focus was the window manager.

Completed
Implemented dynamic z-index so the active window is always brought to the front.
Added window minimization.Implemented restore functionality from the Apps Bar.
Preserved window state while minimized instead of closing the application.

Challenge: Initially, minimizing a window removed it from the UI, but there was no way to bring it back because clicking the app icon simply ignored already opened apps.

Solution: Instead of treating minimized windows as closed, I introduced a minimized state for each window. The Apps Bar now checks whether an app is already open, minimized, or closed, and performs the appropriate action—open, restore, or bring it to the front. This keeps the component mounted and preserves its state while hidden.

The desktop now supports opening, closing, dragging, minimizing, restoring, and proper window stacking. With these core interactions in place, the next milestone is maximize/restore, followed by window resizing and a global state refactor with Zustand.