Ansatz 1. Wenn das nix wird, esse ich einen Besen

BeWo/ViewModel/Controls/AI/AiChatButtonWithHistoryViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BeWo.ViewModel.Controls.AI
+{
+	public class AiChatButtonWithHistoryViewModel : AiChatButtonViewModel
+	{
+		private string currentValue;
+
+		public int CurrentIndex { get; set; }
+		public List<string> History { get; set; }
+
+		public string CurrentValue
+		{
+			get => currentValue;
+			set => SetProperty(ref currentValue, value, nameof(CurrentValue));
+		}
+
+		public bool IsUndoButtonVisible => CurrentIndex > 0;
+		public bool IsRedoButtonVisible => CurrentIndex < History.Count - 1;
+
+		public override bool IsHistoryEnabled => true; 
+
+		public AiChatButtonWithHistoryViewModel() : base()
+		{
+			History = new List<string>();
+			CurrentIndex = 0;
+			AssistentCommands = new List<AiMenuItemTemplate>()
+			{
+				new AiMenuItemTemplate()
+				{
+					Command = new DevExpress.Mvvm.DelegateCommand<AiConversationMessageVM>(x => Accept1(x.Message)),
+					Icon = null,
+					Name = "Akzeptieren"
+				},
+				new AiMenuItemTemplate()
+				{
+					Command = new DevExpress.Mvvm.DelegateCommand<AiConversationMessageVM>(x => Accept2(x.Message)),
+					Icon = null,
+					Name = "Ersetzen"
+				},
+			};
+		}
+
+		public void ClearHistory()
+		{
+			History.Clear();
+			History.Add(CurrentValue);
+			CurrentIndex = 0;
+
+			FirePropertyChanged(nameof(IsRedoButtonVisible));
+			FirePropertyChanged(nameof(IsUndoButtonVisible));
+		}
+
+		public void Accept(string str)
+		{
+			var idx = CurrentIndex;
+			var count = History.Count;
+
+			var last_idx = count - 1;
+
+			if (last_idx > idx)
+			{
+				History.RemoveRange(idx + 1, last_idx - idx);
+			}
+
+			if (CurrentValue != History[CurrentIndex])
+			{
+				History.Add(CurrentValue);
+				CurrentIndex++;
+			}
+
+			History.Add(str);
+			CurrentIndex++;
+
+			CurrentValue = str;
+		}
+
+		public void UndoAiAction()
+		{
+			if (CurrentIndex <= 0)
+				return;
+
+			CurrentIndex--;
+			CurrentValue = History[CurrentIndex];
+		}
+
+		public void RedoAiAction()
+		{
+			if (CurrentIndex >= History.Count - 1)
+				return;
+
+			CurrentIndex++;
+			CurrentValue = History[CurrentIndex];
+		}
+
+		public void Accept1(string s)
+		{
+
+		}
+
+		public void Accept2(string s)
+		{
+
+		}
+	}
+}