The `visibility ` property doesn't change when the window is minimized.
It used to work but broke at some point, don't know when. Works on XFCE.

Demo app
```
import QtQuick

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    onVisibilityChanged: function(visibility) {
        console.log(visibility === Window.Minimized, visibility)
    }
}
```

STEPS TO REPRODUCE
1. run demo app
2. minimize window

OBSERVED RESULT
visibility === Window.Minimized is FALSE

EXPECTED RESULT
visibility === Window.Minimized is true

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20251024
KDE Plasma Version: 6.5.0
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.17.4-1-default (64-bit)
Graphics Platform: Wayland