fix unwanted title bar when special effect is enabled

Zhao Yuhang

2025-02-08 6f4ab6474fa81556b1d90f6f87f8322282d054db

 examples/mainwindow/dark-style.qss

@@ -1,11 +1,13 @@
/* Window bar */

QWK--WindowBar[bar-active=true] {
    background-color: #3C3C3C;
    /*background-color: #3C3C3C;*/
    background-color: transparent;
}

QWK--WindowBar[bar-active=false] {
    background-color: #505050;
    /*background-color: #505050;*/
    background-color: transparent;
}