fix: complete retail parity stability pass

src/AcDream.Core/Chat/ChatLog.cs

@@ -179,14 +179,28 @@ public sealed class ChatLog
 
     /// <summary>PlayerKilled (0x019E) — death announcement.</summary>
     /// <remarks>
-    /// Death messages are routed as <see cref="ChatKind.System"/> so they
-    /// share styling with other server announcements. The
+    /// Retail <c>ClientCombatSystem::HandlePlayerDeathEvent @0x0056C320</c>
+    /// suppresses this bystander-facing line when the local player is either
+    /// the victim or killer; those participants receive their dedicated
+    /// 0x01AC/0x01AD notification instead. Death messages that survive that
+    /// gate are routed as <see cref="ChatKind.System"/> so they share styling
+    /// with other server announcements. The
     /// <c>SenderGuid</c> field carries the victim guid; the
     /// <c>ChannelId</c> field carries the killer guid (a small misuse
     /// of the field but avoids a schema change).
     /// </remarks>
-    public void OnPlayerKilled(string deathMessage, uint victimGuid, uint killerGuid)
+    public void OnPlayerKilled(
+        string deathMessage,
+        uint victimGuid,
+        uint killerGuid,
+        uint localPlayerGuid = 0u)
     {
+        if (localPlayerGuid != 0u
+            && (localPlayerGuid == victimGuid || localPlayerGuid == killerGuid))
+        {
+            return;
+        }
+
         Append(new ChatEntry(
             Kind: ChatKind.System,
             Sender: "",