fix: 成就列表解锁时间显示颜色错误

src/MaaWpfGui/Views/UI/AchievementListWindow.xaml

@@ -60,11 +60,11 @@
                                 Value="{Binding Progress}" />
                             <VirtualizingStackPanel Orientation="Horizontal" Visibility="{c:Binding IsUnlocked}">
                                 <TextBlock
-                                    Foreground="{Binding MedalBrush}"
+                                    uiBehaviors:ResourceReferenceHelper.ForegroundResourceKey="{Binding MedalBrushKey}"
                                     Text="{DynamicResource AchievementUnlockedAt}"
                                     TextWrapping="Wrap" />
                                 <TextBlock
-                                    Foreground="{Binding MedalBrush}"
+                                    uiBehaviors:ResourceReferenceHelper.ForegroundResourceKey="{Binding MedalBrushKey}"
                                     Text="{Binding UnlockedTimeLocal, StringFormat={}{0:G}}"
                                     TextWrapping="Wrap" />
                             </VirtualizingStackPanel>

src/MaaWpfGui/Views/UserControl/Settings/AchievementSettings.xaml

@@ -41,7 +41,7 @@
             Margin="5"
             hc:FloatingBlock.Content="{Binding Tip}"
             Background="{DynamicResource MouseOverRegionBrushOpacity75}"
-            BorderBrush="{Binding MedalBrush}"
+            uiBehaviors:ResourceReferenceHelper.BorderBrushResourceKey="{Binding MedalBrushKey}"
             BorderThickness="1"
             PreviewMouseLeftButtonDown="{s:Action OnDebugClick}"
             Style="{StaticResource BorderCircular}">