fix: TooltipBlock 无法使用 binding

src/MaaWpfGui/Styles/Controls/TooltipBlock.xaml

@@ -3,10 +3,8 @@
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:c="clr-namespace:CalcBinding;assembly=CalcBinding"
-    xmlns:controls="clr-namespace:MaaWpfGui.Styles.Controls"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-    d:DataContext="{d:DesignInstance {x:Type controls:TooltipBlock}}"
     mc:Ignorable="d">
     <Border
         Width="15"
@@ -15,9 +13,10 @@
         HorizontalAlignment="Left"
         VerticalAlignment="Center"
         Background="{DynamicResource MouseOverRegionBrushOpacity75}"
+        DataContext="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}"
         Style="{StaticResource BorderCircular}"
         ToolTipService.InitialShowDelay="{Binding InitialShowDelay}"
-        ToolTipService.IsEnabled="{c:Binding 'TooltipTextEmpty ? \'False\' : \'True\''}">
+        ToolTipService.IsEnabled="{c:Binding !TooltipTextEmpty}">
         <Border.ToolTip>
             <TextBlock
                 MaxWidth="{Binding TooltipMaxWidth}"

src/MaaWpfGui/Styles/Controls/TooltipBlock.xaml.cs

@@ -27,7 +27,6 @@ public partial class TooltipBlock : UserControl
     public TooltipBlock()
     {
         InitializeComponent();
-        DataContext = this;
 
         Opacity = NormalOpacity;