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

Message/NotificationMessage.cs

@@ -3,13 +3,15 @@ using PMSWPF.Enums;
 
 namespace PMSWPF.Message;
 
-public class NotificationMessage:ValueChangedMessage<string>
+public class NotificationMessage : ValueChangedMessage<string>
 {
+    public NotificationMessage(string msg, NotificationType type = NotificationType.Info, bool isGlobal = false) :
+        base(msg)
+    {
+        Type = type;
+        IsGlobal = isGlobal;
+    }
+
     public NotificationType Type { get; set; }
     public bool IsGlobal { get; set; }
-    public NotificationMessage(string msg,NotificationType type=NotificationType.Info,bool isGlobal=false) : base(msg)
-    {
-        this.Type = type;
-        this.IsGlobal = isGlobal;
-    }
 }