清理引用，将NavigatorServices更改为使用Message来实现导航的切换

Data/Entities/DbNlog.cs

@@ -12,21 +12,20 @@ public class DbNlog
     //     @Application, @Logged, @Level,@ThreadID, @Message,
     //     @Logger, @Callsite, @Exception, @Url, @Action, @User
     // )
-    [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]//数据库是自增才配自增 
+    [SugarColumn(IsPrimaryKey = true, IsIdentity = true)] //数据库是自增才配自增 
     public int Id { get; set; }
+
     public DateTime LogTime { get; set; }
     public string Level { get; set; }
     public int ThreadID { get; set; }
-    [SugarColumn(IsNullable = true)]
-    public string ThreadName { get; set; }
+
+    [SugarColumn(IsNullable = true)] public string ThreadName { get; set; }
+
     public string Logger { get; set; }
     public string Callsite { get; set; }
     public int CallsiteLineNumber { get; set; }
     public string Message { get; set; }
-    [SugarColumn(IsNullable = true,ColumnDataType = "text")]
-    public string Exception { get; set; }
 
-    
-    
-    
+    [SugarColumn(IsNullable = true, ColumnDataType = "text")]
+    public string Exception { get; set; }
 }