feat(Desktop): Enable color emoji flag rendering on Windows

- Upgrade SkiaSharp to 3.119.0 for full COLR/CPAL color font support
- Add HarfBuzzSharp 8.3.1.1 for text shaping support
- Add Windows font fallback for Segoe UI Emoji

v2rayN/Directory.Packages.props

@@ -27,6 +27,8 @@
     <PackageVersion Include="TaskScheduler" Version="2.12.2" />
     <PackageVersion Include="WebDav.Client" Version="2.9.0" />
     <PackageVersion Include="YamlDotNet" Version="16.3.0" />
+    <PackageVersion Include="SkiaSharp" Version="3.119.0" />
+    <PackageVersion Include="HarfBuzzSharp" Version="8.3.1.1" />
     <PackageVersion Include="ZXing.Net.Bindings.SkiaSharp" Version="0.16.14" />
   </ItemGroup>
 </Project>

v2rayN/v2rayN.Desktop/Common/AppBuilderExtension.cs

@@ -16,6 +16,13 @@ public static class AppBuilderExtension
                 FontFamily = new FontFamily("Noto Color Emoji")
             });
         }
+        else if (OperatingSystem.IsWindows())
+        {
+            fallbacks.Add(new FontFallback
+            {
+                FontFamily = new FontFamily("Segoe UI Emoji")
+            });
+        }
 
         return appBuilder.With(new FontManagerOptions
         {

v2rayN/v2rayN.Desktop/v2rayN.Desktop.csproj

@@ -28,6 +28,8 @@
 		<PackageReference Include="ReactiveUI.Fody">
 			<TreatAsUsed>true</TreatAsUsed>
 		</PackageReference>
+		<PackageReference Include="SkiaSharp" />
+		<PackageReference Include="HarfBuzzSharp" />
 	</ItemGroup>
 
 	<ItemGroup>