fix gacha item corner radius

src/Snap.Hutao/Snap.Hutao/Control/Theme/CornerRadius.xaml

@@ -1,4 +1,5 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <CornerRadius x:Key="ControlCornerRadiusTop">4,4,0,0</CornerRadius>
     <CornerRadius x:Key="ControlCornerRadiusBottom">0,0,4,4</CornerRadius>
+    <CornerRadius x:Key="ControlCornerRadiusTopRightAndBottomLeft">0,4,0,4</CornerRadius>
 </ResourceDictionary>

src/Snap.Hutao/Snap.Hutao/View/Page/GachaLogPage.xaml

@@ -212,7 +212,7 @@
                     HorizontalAlignment="Right"
                     VerticalAlignment="Top"
                     Background="#80000000"
-                    CornerRadius="0,6,0,6">
+                    CornerRadius="{ThemeResource ControlCornerRadiusTopRightAndBottomLeft}">
                     <TextBlock
                         Margin="6,0,6,2"
                         Foreground="#FFFFFFFF"