Fix native child widget (#133)

SineStriker

2024-09-10 061951346e6bafbfd28de2e0440342dd6caca1c7

 examples/mainwindow/mainwindow.h

@@ -30,6 +30,8 @@
protected:
    bool event(QEvent *event) override;

    void closeEvent(QCloseEvent *event) override;

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