page.go
func (p *Page) PopupText() (string, error) {
	text, err := p.session.GetAlertText()
	if err != nil {
		return "", fmt.Errorf("failed to retrieve popup text: %s", err)
	}
	return text, nil
}
func (p *Page) PopupText() (string, error) {
	text, err := p.session.GetAlertText()
	if err != nil {
		return "", fmt.Errorf("failed to retrieve popup text: %s", err)
	}
	return text, nil
}
// PopupText returns the current alert, confirm, or prompt popup text.