chore(ConnectionManager):给提前配置连接添加错误提示

Assets/Script/Gameplay/Connect/ConnectionLineManager.cs

@@ -72,11 +72,15 @@ namespace Script.Gameplay.Connect
                 IConnectable target = preConnection.target as IConnectable;
                 if (source != null && target != null)
                 {
-                    GenerateConnectionLine(source, target);
+                    var connectionLine = GenerateConnectionLine(source, target);
+                    if (connectionLine == null)
+                    {
+                        Debug.Log($"编号为{preConnection.PreConnectionID}的连接线存在重复连接，生成失败");
+                    }
                 }
                 else
                 {
-                    Debug.Log(preConnection.PreConnectionID + " connection failed to load.");
+                    Debug.Log($"编号为{preConnection.PreConnectionID}的连接线的配置错误，生成失败");
                 }
             }
         }