优化更新代码，添加界面功能并整合

WPFluent/Controls/NavigationView/INavigationAware.cs

@@ -0,0 +1,22 @@
+
+
+
+namespace WPFluent.Abstractions;
+
+/// <summary>
+/// Notifies class about being navigated.
+/// </summary>
+public interface INavigationAware
+{
+    /// <summary>
+    /// Asynchronously handles the event that is fired before the component is navigated from.
+    /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
+    Task OnNavigatedFromAsync();
+
+    /// <summary>
+    /// Asynchronously handles the event that is fired after the component is navigated to.
+    /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
+    Task OnNavigatedToAsync();
+}