fix(UI): 优化弹出菜单位置和层级管理

修复弹出菜单在移动时位置不更新的问题，添加节流机制避免频繁刷新
使用Win32 API强制刷新弹出菜单位置并提升到最顶层
调整浮动工具栏和弹出菜单的样式和位置
移除未使用的字体样式定义

Ink Canvas/App.xaml

@@ -10,24 +10,6 @@
     <Application.Resources>
         <ResourceDictionary>
             <FontFamily x:Key="HarmonyOSFont">./Resources/Fonts/#HarmonyOS Sans SC</FontFamily>
-            <Style TargetType="TextBlock">
-                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSFont}"/>
-            </Style>
-            <Style TargetType="Button">
-                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSFont}"/>
-            </Style>
-            <Style TargetType="TextBox">
-                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSFont}"/>
-            </Style>
-            <Style TargetType="Label">
-                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSFont}"/>
-            </Style>
-            <Style TargetType="MenuItem">
-                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSFont}"/>
-            </Style>
-            <Style TargetType="ui:ScrollViewerEx">
-                <EventSetter Event="PreviewMouseWheel" Handler="ScrollViewer_PreviewMouseWheel"/>
-            </Style>
             <ContextMenu Opened="SysTrayMenu_Opened" Closed="SysTrayMenu_Closed" x:Shared="false" x:Key="SysTrayMenu" Padding="6" ui:ThemeManager.RequestedTheme="Light">
                 <MenuItem IsCheckable="True" IsChecked="False" Checked="HideICCMainWindowTrayIconMenuItem_Checked" Unchecked="HideICCMainWindowTrayIconMenuItem_UnChecked" Name="HideICCMainWindowTrayIconMenuItem">
                     <MenuItem.Header>