Admin menu: make admin / remove admin for players on dedicated servers

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

MultiplayerManager.cs

@@ -561,6 +561,18 @@ namespace MSCO
             SendGame(MsgType.Chat, NetSession.Build(w => w.Write("* " + text)));
         }
 
+        /// <summary>Admin (dedizierter Server): einem Spieler Admin-Rechte geben (9) bzw. nehmen (10).</summary>
+        public void SetAdmin(int playerId, bool admin)
+        {
+            if (session == null || !dedicated) return;
+            session.SendTo(NetSession.HostId, MsgType.AdminAction, NetSession.Build(w =>
+            {
+                w.Write((byte)(admin ? 9 : 10));
+                w.Write(playerId);
+                w.Write("");
+            }));
+        }
+
         public void AdminAction(bool ban, int playerId, string reason)
         {
             if (session == null) return;

Overlays.cs

@@ -355,6 +355,14 @@ namespace MSCO
                         if (GUILayout.Button("BRING", secondary, GUILayout.Height(30), GUILayout.Width(70))) mp.BringPlayer(p.Id);
                         GUILayout.Space(12);
                     }
+                    if (mp.IsDedicated)
+                    {
+                        // Admin geben/nehmen (braucht Steam; der Server meldet, wenn es nicht geht)
+                        GUI.enabled = !self;
+                        if (GUILayout.Button(p.IsAdmin ? "REMOVE ADMIN" : "MAKE ADMIN", secondary, GUILayout.Height(30), GUILayout.Width(120)))
+                            mp.SetAdmin(p.Id, !p.IsAdmin);
+                        GUILayout.Space(12);
+                    }
                     GUI.enabled = !self && !p.IsAdmin;
                     if (GUILayout.Button("KICK", secondary, GUILayout.Height(30), GUILayout.Width(70)))
                         mp.AdminAction(false, p.Id, adminReason);