优化更新代码，添加界面功能并整合

WPFluent/Controls/IconElement/SymbolIconSource.cs

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+using System.Windows.Controls;
+
+
+namespace WPFluent.Controls;
+
+/// <summary>
+/// Represents an icon source that uses a glyph from the specified font.
+/// </summary>
+public class SymbolIconSource : IconSource
+{
+    /// <summary>
+    /// Identifies the <see cref="Filled"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty FilledProperty = DependencyProperty.Register(
+        nameof(Filled),
+        typeof(bool),
+        typeof(SymbolIconSource),
+        new PropertyMetadata(false));
+    /// <summary>
+    /// Identifies the <see cref="FontSize"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty FontSizeProperty = DependencyProperty.Register(
+        nameof(FontSize),
+        typeof(double),
+        typeof(SymbolIconSource),
+        new PropertyMetadata(SystemFonts.MessageFontSize));
+
+    /// <summary>
+    /// Identifies the <see cref="FontStyle"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty FontStyleProperty = DependencyProperty.Register(
+        nameof(FontStyle),
+        typeof(FontStyle),
+        typeof(SymbolIconSource),
+        new PropertyMetadata(FontStyles.Normal));
+
+    /// <summary>
+    /// Identifies the <see cref="FontWeight"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty FontWeightProperty = DependencyProperty.Register(
+        nameof(FontWeight),
+        typeof(FontWeight),
+        typeof(SymbolIconSource),
+        new PropertyMetadata(FontWeights.Normal));
+
+    /// <summary>
+    /// Identifies the <see cref="Symbol"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty SymbolProperty = DependencyProperty.Register(
+        nameof(Symbol),
+        typeof(SymbolRegular),
+        typeof(SymbolIconSource),
+        new PropertyMetadata(SymbolRegular.Empty));
+
+    public override IconElement CreateIconElement()
+    {
+        SymbolIcon symbolIcon = new(Symbol, FontSize, Filled);
+
+        if (!FontSize.Equals(SystemFonts.MessageFontSize))
+        {
+            symbolIcon.FontSize = FontSize;
+        }
+
+        if (FontWeight != FontWeights.Normal)
+        {
+            symbolIcon.FontWeight = FontWeight;
+        }
+
+        if (FontStyle != FontStyles.Normal)
+        {
+            symbolIcon.FontStyle = FontStyle;
+        }
+
+        if (Foreground != SystemColors.ControlTextBrush)
+        {
+            symbolIcon.Foreground = Foreground;
+        }
+
+        return symbolIcon;
+    }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether or not we should use the <see cref="SymbolFilled"/>.
+    /// </summary>
+    public bool Filled { get => (bool)GetValue(FilledProperty); set => SetValue(FilledProperty, value); }
+
+    /// <inheritdoc cref="Control.FontSize"/>
+    public double FontSize { get => (double)GetValue(FontSizeProperty); set => SetValue(FontSizeProperty, value); }
+
+    /// <inheritdoc cref="Control.FontStyle"/>
+    public FontStyle FontStyle
+    {
+        get => (FontStyle)GetValue(FontStyleProperty);
+        set => SetValue(FontStyleProperty, value);
+    }
+
+    /// <inheritdoc cref="Control.FontWeight"/>
+    public FontWeight FontWeight
+    {
+        get => (FontWeight)GetValue(FontWeightProperty);
+        set => SetValue(FontWeightProperty, value);
+    }
+
+    /// <summary>
+    /// Gets or sets displayed <see cref="SymbolRegular"/>.
+    /// </summary>
+    public SymbolRegular Symbol
+    {
+        get => (SymbolRegular)GetValue(SymbolProperty);
+        set => SetValue(SymbolProperty, value);
+    }
+}