fix: QObjectPrivate::threadData type change when qt >=5.15

iveswang

2024-06-12 7610c3a509b8a04d25e72a6282d9c8ea8ecbd27f

 examples/mainwindow/light-style.qss

@@ -144,6 +144,10 @@
    background-color: #F3F3F3;
}

MainWindow[custom-style=true] {
    background-color: transparent;
}

QWidget#clock-widget {
    font-size: 75px;
    color: #333333;