usingMicrosoft.UI;usingMicrosoft.UI.Xaml;usingMicrosoft.UI.Xaml.Input;usingMicrosoft.UI.Xaml.Media;usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingOpenAI;usingOpenAI.Managers;usingOpenAI.ObjectModels.RequestModels;usingOpenAI.ObjectModels;namespaceChatGPT_WinUI3{publicclassMessageItem{publicstr...