finish border paint code

Zhao Yuhang

2023-12-11 2df00b7e7bf5fd9c2f171449f71d1b101480f0db

 src/widgets/widgetwindowagent_p.h

@@ -16,6 +16,8 @@

        // Host
        QWidget *hostWidget{};

        std::unique_ptr<QObject> paintFilter;
    };

}