Fix RoundStartTimeSpan not being networked on client-side after reconnecting (#23707)

Fix RoundStartTimeSpan state not being networked on reconnections

Content.Client/GameTicking/Managers/ClientGameTicker.cs

@@ -57,6 +57,7 @@ namespace Content.Client.GameTicking.Managers
 
             SubscribeNetworkEvent<TickerJoinLobbyEvent>(JoinLobby);
             SubscribeNetworkEvent<TickerJoinGameEvent>(JoinGame);
+            SubscribeNetworkEvent<TickerConnectionStatusEvent>(ConnectionStatus);
             SubscribeNetworkEvent<TickerLobbyStatusEvent>(LobbyStatus);
             SubscribeNetworkEvent<TickerLobbyInfoEvent>(LobbyInfo);
             SubscribeNetworkEvent<TickerLobbyCountdownEvent>(LobbyCountdown);
@@ -110,6 +111,11 @@ namespace Content.Client.GameTicking.Managers
             _stateManager.RequestStateChange<LobbyState>();
         }
 
+        private void ConnectionStatus(TickerConnectionStatusEvent message)
+        {
+            RoundStartTimeSpan = message.RoundStartTimeSpan;
+        }
+
         private void LobbyStatus(TickerLobbyStatusEvent message)
         {
             StartTime = message.StartTime;

Content.Server/GameTicking/GameTicker.Lobby.cs

@@ -86,6 +86,11 @@ namespace Content.Server.GameTicking
                 ("desc", desc));
         }
 
+        private TickerConnectionStatusEvent GetConnectionStatusMsg()
+        {
+            return new TickerConnectionStatusEvent(RoundStartTimeSpan);
+        }
+
         private TickerLobbyStatusEvent GetStatusMsg(ICommonSession session)
         {
             _playerGameStatuses.TryGetValue(session.UserId, out var status);

Content.Server/GameTicking/GameTicker.Player.cs

@@ -66,6 +66,8 @@ namespace Content.Server.GameTicking
                         ? Loc.GetString("player-first-join-message", ("name", args.Session.Name))
                         : Loc.GetString("player-join-message", ("name", args.Session.Name)));
 
+                    RaiseNetworkEvent(GetConnectionStatusMsg(), session.Channel);
+
                     if (LobbyEnabled && _roundStartCountdownHasNotStartedYetDueToNoPlayers)
                     {
                         _roundStartCountdownHasNotStartedYetDueToNoPlayers = false;

Content.Shared/GameTicking/SharedGameTicker.cs

@@ -63,6 +63,15 @@ namespace Content.Shared.GameTicking
         }
     }
 
+    [Serializable, NetSerializable]
+    public sealed class TickerConnectionStatusEvent : EntityEventArgs
+    {
+        public TimeSpan RoundStartTimeSpan { get; }
+        public TickerConnectionStatusEvent(TimeSpan roundStartTimeSpan)
+        {
+            RoundStartTimeSpan = roundStartTimeSpan;
+        }
+    }
 
     [Serializable, NetSerializable]
     public sealed class TickerLobbyStatusEvent : EntityEventArgs