feat: 补齐工具箱剩余 MVP 能力

实现轻量图标系统、图标选择器、本地图标导入和关联图标缓存。

补齐外观设置、捕获式快捷键录入、卡片右键菜单、分类图标编辑，以及分类和卡片拖拽排序。

同时将配置数据版本升级到 2，并在导入和加载时拒绝更高版本配置，避免误读未来格式。

src/PersonalToolbox/Views/CombinationEditorWindow.xaml

@@ -25,6 +25,7 @@
                 <RowDefinition Height="Auto" />
                 <RowDefinition Height="Auto" />
                 <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
             </Grid.RowDefinitions>
 
             <TextBlock Text="名称" VerticalAlignment="Center" />
@@ -54,12 +55,30 @@
                      ToolTip="描述这个组合会打开哪些环境或工具。" />
 
             <TextBlock Grid.Row="2" Text="快捷键" VerticalAlignment="Center" />
-            <TextBox x:Name="HotkeyTextBox"
-                     Grid.Row="2"
-                     Grid.Column="1"
-                     MinHeight="32"
-                     Margin="0,8,16,0"
-                     ToolTip="格式示例：Ctrl + Alt + D。组合可被全局快捷键直接启动。" />
+            <Grid Grid.Row="2"
+                  Grid.Column="1"
+                  Margin="0,8,16,0">
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="*" />
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="Auto" />
+                </Grid.ColumnDefinitions>
+                <TextBox x:Name="HotkeyTextBox"
+                         MinHeight="32"
+                         ToolTip="格式示例：Ctrl + Alt + D。可点击录入来捕获快捷键。" />
+                <Button Grid.Column="1"
+                        Content="录入"
+                        Width="64"
+                        Margin="8,0,0,0"
+                        ToolTip="打开快捷键捕获窗口。"
+                        Click="CaptureHotkeyButton_OnClick" />
+                <Button Grid.Column="2"
+                        Content="清除"
+                        Width="64"
+                        Margin="8,0,0,0"
+                        ToolTip="清除当前快捷键。"
+                        Click="ClearHotkeyButton_OnClick" />
+            </Grid>
 
             <StackPanel Grid.Row="2"
                         Grid.Column="2"
@@ -78,6 +97,33 @@
                     <ComboBoxItem Content="失败后停止" Tag="Stop" />
                 </ComboBox>
             </StackPanel>
+
+            <TextBlock Grid.Row="3" Text="图标" VerticalAlignment="Center" Margin="0,12,0,0" />
+            <StackPanel Grid.Row="3"
+                        Grid.Column="1"
+                        Grid.ColumnSpan="3"
+                        Orientation="Horizontal"
+                        Margin="0,12,0,0">
+                <Border Width="42"
+                        Height="30"
+                        CornerRadius="6"
+                        Background="{StaticResource IconBackgroundBrush}">
+                    <TextBlock x:Name="IconPreviewTextBlock"
+                               HorizontalAlignment="Center"
+                               VerticalAlignment="Center"
+                               FontWeight="SemiBold"
+                               Foreground="{StaticResource PrimaryBrush}" />
+                </Border>
+                <TextBlock x:Name="IconNameTextBlock"
+                           Margin="10,0,0,0"
+                           VerticalAlignment="Center"
+                           Foreground="{StaticResource SecondaryTextBrush}" />
+                <Button Content="选择图标"
+                        Width="88"
+                        Margin="12,0,0,0"
+                        ToolTip="从内置图标库选择，或导入本地图片/ico。"
+                        Click="ChooseIconButton_OnClick" />
+            </StackPanel>
         </Grid>
 
         <Grid Grid.Row="1" Margin="0,16,0,0">