优化更新代码，添加界面功能并整合

WPFluent/Controls/MessageBox/MessageBoxIconConverter.cs

@@ -0,0 +1,39 @@
+
+using WPFluent.Controls;
+
+using System;
+using System.Globalization;
+using System.Windows;
+
+using System.Windows.Data;
+
+
+namespace WPFluent.Controls;
+
+[ValueConversion(typeof(MessageBoxIcon), typeof(string))]
+public sealed class MessageBoxIconConverter : IValueConverter
+{
+    public static MessageBoxIconConverter New => new();
+
+    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        if (value is MessageBoxIcon icon)
+        {
+            return icon switch
+            {
+                MessageBoxIcon.Information => FontSymbols.Info,
+                MessageBoxIcon.Success => FontSymbols.Accept,
+                MessageBoxIcon.Warning => FontSymbols.Warning,
+                MessageBoxIcon.Error => FontSymbols.Cancel,
+                MessageBoxIcon.Question => FontSymbols.Unknown,
+                MessageBoxIcon.None or _ => string.Empty,
+            };
+        }
+        return string.Empty;
+    }
+
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        return DependencyProperty.UnsetValue;
+    }
+}