Detect sdk version

.github/workflows/build_performance_overlay.yaml

@@ -56,6 +56,25 @@ jobs:
           }
           "WIDGET_PACKAGE_VERSION=$widgetVersion" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
 
+          $minTpv = [version]"10.0.18362.0"
+          $unionMetadataRoot = Join-Path ${env:ProgramFiles(x86)} "Windows Kits\10\UnionMetadata"
+          if (-not (Test-Path $unionMetadataRoot)) {
+            throw "UWP UnionMetadata folder not found at '$unionMetadataRoot'."
+          }
+
+          $detectedTpv = Get-ChildItem -Path $unionMetadataRoot -Directory |
+            Where-Object { $_.Name -match '^\d+\.\d+\.\d+\.\d+$' } |
+            Where-Object { [version]$_.Name -ge $minTpv } |
+            Sort-Object { [version]$_.Name } -Descending |
+            Select-Object -First 1 -ExpandProperty Name
+
+          if (-not $detectedTpv) {
+            throw "No installed UWP TargetPlatformVersion >= $minTpv was found under '$unionMetadataRoot'."
+          }
+
+          Write-Host "Using UWP TargetPlatformVersion: $detectedTpv"
+          "UWP_TPV=$detectedTpv" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
       - name: Restore PerformanceOverlay dependencies
         run: dotnet restore PerformanceOverlay/PerformanceOverlay.csproj
 
@@ -89,6 +108,8 @@ jobs:
             /restore `
             /p:Configuration=Release `
             /p:Platform=x64 `
+            /p:TargetPlatformVersion=${{ env.UWP_TPV }} `
+            /p:TargetPlatformMinVersion=10.0.18362.0 `
             /p:AppxBundle=Never `
             /p:UapAppxPackageBuildMode=SideloadOnly `
             /p:AppxPackageDir="$widgetPackageDir\\" `