Optimize system button area APIs

SineStriker

2023-12-29 76924a335f40a0c3cc13805b4cb9429c336d33ca

 examples/mainwindow/mainwindow.h

@@ -28,13 +28,11 @@

private:
    void installWindowAgent();
    void installStyleAgent();
    void loadStyleSheet(Theme theme);

    Theme currentTheme{};

    QWK::WidgetWindowAgent *windowAgent;
    QWK::StyleAgent *styleAgent;
};

#endif // MAINWINDOW_H