调整UI布局，消息模版新增语言字段

Atomx.Common/Entities/MessageTemplate.cs

@@ -16,6 +16,11 @@ namespace Atomx.Common.Entities
         [Key]
         public long Id { get; set; }
 
+        /// <summary>
+        /// 语言编码
+        /// </summary>
+        public int LanguageId { get; set; }
+
         /// <summary>
         /// 消息模板类型
         /// </summary>