feat(runtime): share chat commands and run login sequence

src/AcDream.Runtime/Chat/RuntimeChatCommandFeedback.cs

@@ -0,0 +1,32 @@
+using AcDream.Core.Chat;
+using AcDream.Runtime.Gameplay;
+
+namespace AcDream.Runtime.Chat;
+
+/// <summary>
+/// Presentation-free feedback for chat commands executed by a host rather
+/// than a panel. It borrows the canonical communication owner; it creates no
+/// transcript or reply-target mirror.
+/// </summary>
+public sealed class RuntimeChatCommandFeedback : IChatCommandFeedback
+{
+    private readonly RuntimeCommunicationState _communication;
+
+    public RuntimeChatCommandFeedback(RuntimeCommunicationState communication)
+    {
+        _communication = communication
+            ?? throw new ArgumentNullException(nameof(communication));
+    }
+
+    public string? LastIncomingTellSender =>
+        _communication.CommandTargets.LastIncomingTellSender;
+
+    public string? LastOutgoingTellTarget =>
+        _communication.CommandTargets.LastOutgoingTellTarget;
+
+    public void ShowInterfaceText(string text) =>
+        _communication.AddText(text, RetailLogTextType.ClientLocal);
+
+    public void ShowSystemMessage(string text) =>
+        _communication.Chat.OnSystemMessage(text, chatType: 0x00u);
+}