工具路径为exe时默认显示exe自身图标

ToolItem新增IsExePath计算属性，ExePathToIconConverter通过Icon.ExtractAssociatedIcon提取exe图标并缓存，卡片模板图标区改为三层优先级：FontAwesome > exe图标 > 首字母

PersonalToolBox/Models/ToolItem.cs

@@ -62,4 +62,12 @@ public class ToolItem
     /// 是否在软件启动时自动运行
     /// </summary>
     public bool AutoRunOnStart { get; set; }
+
+    /// <summary>
+    /// 路径是否指向 .exe 文件（仅运行时判断，不存入 JSON）
+    /// </summary>
+    [JsonIgnore]
+    public bool IsExePath =>
+        !IsGroup && !string.IsNullOrWhiteSpace(ExecutablePath) &&
+        ExecutablePath.EndsWith(".exe", StringComparison.OrdinalIgnoreCase);
 }

PersonalToolBox/Views/MainWindow.xaml

@@ -17,6 +17,7 @@
         <local:BoolToOpacityConverter x:Key="BoolToOpacityConverter"/>
         <local:FirstCharConverter x:Key="FirstCharConverter"/>
         <local:StringToIconCharConverter x:Key="StringToIconCharConverter"/>
+        <local:ExePathToIconConverter x:Key="ExePathToIconConverter"/>
 
         <!-- 工具卡片模板 -->
         <DataTemplate x:Key="ToolCardTemplate" DataType="{x:Type models:ToolItem}">
@@ -93,7 +94,26 @@
                                 </Style>
                             </fa:IconBlock.Style>
                         </fa:IconBlock>
-                        <!-- 首字母回退（IconCode 为空时显示） -->
+                        <!-- exe 图标回退（IconCode为空且为exe时显示） -->
+                        <Image Source="{Binding ExecutablePath, Converter={StaticResource ExePathToIconConverter}}"
+                               Width="28" Height="28"
+                               HorizontalAlignment="Center">
+                            <Image.Style>
+                                <Style TargetType="Image">
+                                    <Setter Property="Visibility" Value="Collapsed"/>
+                                    <Style.Triggers>
+                                        <MultiDataTrigger>
+                                            <MultiDataTrigger.Conditions>
+                                                <Condition Binding="{Binding IconCode}" Value=""/>
+                                                <Condition Binding="{Binding IsExePath}" Value="True"/>
+                                            </MultiDataTrigger.Conditions>
+                                            <Setter Property="Visibility" Value="Visible"/>
+                                        </MultiDataTrigger>
+                                    </Style.Triggers>
+                                </Style>
+                            </Image.Style>
+                        </Image>
+                        <!-- 首字母回退（IconCode为空且非exe时显示） -->
                         <TextBlock FontSize="28"
                                    Foreground="{DynamicResource Theme.Accent}"
                                    HorizontalAlignment="Center">
@@ -102,9 +122,13 @@
                                     <Setter Property="Visibility" Value="Collapsed"/>
                                     <Setter Property="Text" Value="{Binding Name, Converter={StaticResource FirstCharConverter}}"/>
                                     <Style.Triggers>
-                                        <DataTrigger Binding="{Binding IconCode}" Value="">
+                                        <MultiDataTrigger>
+                                            <MultiDataTrigger.Conditions>
+                                                <Condition Binding="{Binding IconCode}" Value=""/>
+                                                <Condition Binding="{Binding IsExePath}" Value="False"/>
+                                            </MultiDataTrigger.Conditions>
                                             <Setter Property="Visibility" Value="Visible"/>
-                                        </DataTrigger>
+                                        </MultiDataTrigger>
                                     </Style.Triggers>
                                 </Style>
                             </TextBlock.Style>

PersonalToolBox/Views/MainWindow.xaml.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Specialized;
 using System.ComponentModel;
 using System.Drawing;
@@ -229,3 +230,53 @@ public class StringToIconCharConverter : IValueConverter
     public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
         => throw new NotImplementedException();
 }
+
+/// <summary>
+/// string (exe路径) → ImageSource: 提取 .exe 文件自身图标，带缓存
+/// </summary>
+public class ExePathToIconConverter : IValueConverter
+{
+    private static readonly ConcurrentDictionary<string, ImageSource?> Cache = new();
+
+    public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        if (value is not string path || path.Length == 0)
+            return null;
+
+        if (!path.EndsWith(".exe", StringComparison.OrdinalIgnoreCase))
+            return null;
+
+        return Cache.GetOrAdd(path, key =>
+        {
+            try
+            {
+                if (!File.Exists(key))
+                    return null;
+
+                using var icon = System.Drawing.Icon.ExtractAssociatedIcon(key);
+                if (icon == null)
+                    return null;
+
+                using var bitmap = icon.ToBitmap();
+                using var ms = new MemoryStream();
+                bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
+                ms.Seek(0, SeekOrigin.Begin);
+
+                var image = new BitmapImage();
+                image.BeginInit();
+                image.CacheOption = BitmapCacheOption.OnLoad;
+                image.StreamSource = ms;
+                image.EndInit();
+                image.Freeze();
+                return image;
+            }
+            catch
+            {
+                return null;
+            }
+        });
+    }
+
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        => throw new NotImplementedException();
+}