finish border paint code

Zhao Yuhang

2023-12-11 2df00b7e7bf5fd9c2f171449f71d1b101480f0db

 src/core/contexts/win32windowcontext_p.h

@@ -21,6 +21,9 @@
            TitleBar,
        };

        QString key() const override;
        void virtual_hook(int id, void *data) override;

    protected:
        bool setupHost() override;