[BUGFIX] "Ghost" in the lobby lets you see the whole chat (#33529)

* fix bug, in ghost command lobby

* fix

* Fix build

Content.Server/Ghost/GhostCommand.cs

@@ -1,7 +1,9 @@
 using Content.Server.Popups;
 using Content.Shared.Administration;
+using Content.Shared.GameTicking;
 using Content.Shared.Mind;
 using Robust.Shared.Console;
+using Content.Server.GameTicking;
 
 namespace Content.Server.Ghost
 {
@@ -23,6 +25,14 @@ namespace Content.Server.Ghost
                 return;
             }
 
+            var gameTicker = _entities.System<GameTicker>();
+            if (!gameTicker.PlayerGameStatuses.TryGetValue(player.UserId, out var playerStatus) ||
+                playerStatus is not PlayerGameStatus.JoinedGame)
+            {
+                shell.WriteLine("ghost-command-error-lobby");
+                return;
+            }
+
             if (player.AttachedEntity is { Valid: true } frozen &&
                 _entities.HasComponent<AdminFrozenComponent>(frozen))
             {