Select latest Windows SDK version in build workflow

Add step to select the latest Windows SDK version for the build process.

Author: Klubuntu

.github/workflows/build.yml

@@ -278,6 +278,38 @@ jobs:
 
       - name: Setup MSVC
         uses: ilammy/msvc-dev-cmd@v1
+
+      - name: Select Windows SDK (>= 10.0.20348.0)
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = "Stop"
+      
+          $kitsRoot = "C:\Program Files (x86)\Windows Kits\10\Lib"
+          if (-not (Test-Path $kitsRoot)) {
+            throw "Windows Kits not found at: $kitsRoot"
+          }
+      
+          # Find installed SDK versions
+          $versions = Get-ChildItem -Directory $kitsRoot | Select-Object -ExpandProperty Name
+          Write-Host "Installed Windows SDK versions:"
+          $versions | Sort-Object | ForEach-Object { Write-Host " - $_" }
+      
+          # Pick the newest one
+          $selected = ($versions | Sort-Object {[version]$_} | Select-Object -Last 1)
+          if (-not $selected) { throw "Could not determine installed Windows SDK version." }
+      
+          Write-Host "Selected Windows SDK version: $selected"
+      
+          # CMake/VS tooling often expects a trailing backslash in WindowsSDKVersion
+          "WindowsSDKVersion=$selected\" | Out-File -Append -Encoding utf8 $env:GITHUB_ENV
+      
+          # Also help CMake explicitly
+          "CMAKE_SYSTEM_VERSION=$selected" | Out-File -Append -Encoding utf8 $env:GITHUB_ENV
+      
+          # Sanity check: must be >= 10.0.20348.0
+          if ([version]($selected.TrimEnd("\")) -lt [version]"10.0.20348.0") {
+            throw "Selected SDK $selected is still < 10.0.20348.0"
+          }
 
       - name: Install Ninja
         shell: pwsh