Fix Windows server QuickJS C++ and nut headers

ddiff --git a/docs/WINDOWS_SERVER_QJS_CPP_NUT_HEADERS.md b/docs/WINDOWS_SERVER_QJS_CPP_NUT_HEADERS.md
nnew file mode 100644
iindex 0000000..9de5e6a
---- /dev/null
++++ b/docs/WINDOWS_SERVER_QJS_CPP_NUT_HEADERS.md
@@@ -0,0 +1,8 @@
++# Windows server build: QuickJS C++ and vscript nut headers
++
++The Windows HL2MP server build needs two extra fixes on hosted Actions runners:
++
++- The Source SDK custom build step for `vscript_server.nut` can report success without producing `vscript_server_nut.h`, so the build script pre-generates `spawn_helper_nut.h` and `vscript_server_nut.h` with `devtools/bin/texttoarray.py`.
++- QuickJS is compiled as C with `clang-cl`, but its header is also included from C++ server files. The script patches the SDK copy of `quickjs.h` so MSVC C++ can compile QuickJS value macros without C compound literals/designated initializers.
++
++The patch is applied only to the generated SDK copy under `engine/source-sdk-2013`, not to the vendored source files.
ddiff --git a/tools/build-sdk-windows.ps1 b/tools/build-sdk-windows.ps1
iindex f5878b9..ebe01c5 100644
---- a/tools/build-sdk-windows.ps1
++++ b/tools/build-sdk-windows.ps1
@@@ -89,6 +89,7 @@ function Ensure-PythonCommandForMSBuild {
    }
  
    $pyDir = Split-Path -Parent $py
++  $script:OpenVibePythonExe = $py
    $bat = Join-Path $shimDir "python.bat"
    $cmdFile = Join-Path $shimDir "python.cmd"
    $batContent = @"
@@@ -98,6 +99,7 @@ exit /b %ERRORLEVEL%
  "@
    Set-Content -Encoding ascii -Path $bat -Value $batContent
    Set-Content -Encoding ascii -Path $cmdFile -Value $batContent
++  $script:OpenVibePythonShim = $bat
  
    # Put the shim first so custom build steps that literally run `python` find it.
    $env:PATH = "$shimDir;$pyDir;$env:PATH"
@@@ -109,6 +111,97 @@ exit /b %ERRORLEVEL%
    & cmd.exe /d /s /c "where python" 2>&1 | Tee-Object -FilePath $log -Append
  }
  
++
++
++# OPENVIBE_FIX_QJS_CPP_AND_NUT_HEADERS
++function Patch-QuickJsHeaderForMsvcCpp {
++  $header = Join-Path $Sdk "src/game/shared/openvibe/third_party/quickjs/quickjs.h"
++  if (!(Test-Path $header)) {
++    Say "QuickJS header not present yet, skipping C++ compatibility patch: $header"
++    return
++  }
++
++  $log = Join-Path $LogDir "quickjs-cpp-header-patch.txt"
++  "header=$header" | Out-File $log
++  $q = Get-Content -Raw $header
++  $orig = $q
++
++  $mkvalOld = '#define JS_MKVAL(tag, val) (JSValue){ (JSValueUnion){ .uint64 = (uint32_t)(val) }, tag }'
++  $mkvalNew = @'
++#if defined(__cplusplus)
++static inline JSValue JS_MKVAL_CPP(int tag, uint32_t val) { JSValue v; v.u.uint64 = (uint32_t)val; v.tag = tag; return v; }
++#define JS_MKVAL(tag, val) JS_MKVAL_CPP((tag), (uint32_t)(val))
++#else
++#define JS_MKVAL(tag, val) (JSValue){ (JSValueUnion){ .uint64 = (uint32_t)(val) }, tag }
++#endif
++'@
++  $q = $q.Replace($mkvalOld, $mkvalNew)
++
++  $mkptrOld = '#define JS_MKPTR(tag, p) (JSValue){ (JSValueUnion){ .ptr = p }, tag }'
++  $mkptrNew = @'
++#if defined(__cplusplus)
++static inline JSValue JS_MKPTR_CPP(int tag, void *p) { JSValue v; v.u.ptr = p; v.tag = tag; return v; }
++#define JS_MKPTR(tag, p) JS_MKPTR_CPP((tag), (void *)(p))
++#else
++#define JS_MKPTR(tag, p) (JSValue){ (JSValueUnion){ .ptr = p }, tag }
++#endif
++'@
++  $q = $q.Replace($mkptrOld, $mkptrNew)
++
++  $nanOld = '#define JS_NAN (JSValue){ .u.float64 = JS_FLOAT64_NAN, JS_TAG_FLOAT64 }'
++  $nanNew = @'
++#if defined(__cplusplus)
++static inline JSValue JS_NAN_CPP(void) { JSValue v; v.u.float64 = JS_FLOAT64_NAN; v.tag = JS_TAG_FLOAT64; return v; }
++#define JS_NAN JS_NAN_CPP()
++#else
++#define JS_NAN (JSValue){ .u.float64 = JS_FLOAT64_NAN, JS_TAG_FLOAT64 }
++#endif
++'@
++  $q = $q.Replace($nanOld, $nanNew)
++
++  $q = $q.Replace('    JSCFunctionType ft = { .generic_magic = func };', '    JSCFunctionType ft; memset(&ft, 0, sizeof(ft)); ft.generic_magic = func;')
++
++  if ($q -ne $orig) {
++    Set-Content -Encoding ascii -Path $header -Value $q
++    "patched=1" | Out-File $log -Append
++    Say "patched QuickJS header for MSVC C++ compound literal/designated initializer compatibility"
++  } else {
++    "patched=0" | Out-File $log -Append
++    Say "QuickJS header C++ patch made no changes"
++  }
++}
++
++function Ensure-ServerNutHeaders {
++  $serverDir = Join-Path $Src "game/server"
++  $textToArray = Join-Path $Src "devtools/bin/texttoarray.py"
++  $log = Join-Path $LogDir "server-nut-headers.txt"
++  "serverDir=$serverDir" | Out-File $log
++  "textToArray=$textToArray" | Out-File $log -Append
++  "pythonExe=$script:OpenVibePythonExe" | Out-File $log -Append
++  "pythonShim=$script:OpenVibePythonShim" | Out-File $log -Append
++
++  if (!(Test-Path $textToArray)) {
++    throw "Missing Source SDK texttoarray.py at $textToArray"
++  }
++  if (-not $script:OpenVibePythonExe -or !(Test-Path $script:OpenVibePythonExe)) {
++    throw "Python exe was not captured for nut header generation. Check python-version.txt."
++  }
++
++  foreach ($name in @("spawn_helper", "vscript_server")) {
++    $input = Join-Path $serverDir "$name.nut"
++    $out = Join-Path $serverDir "${name}_nut.h"
++    if (!(Test-Path $input)) {
++      "missing input $input" | Out-File $log -Append
++      continue
++    }
++    Say "generating $out from $input"
++    & $script:OpenVibePythonExe $textToArray $input "g_Script_$name" | Set-Content -Encoding ascii -Path $out
++    if ($LASTEXITCODE -ne 0) { throw "texttoarray.py failed for $input" }
++    if (!(Test-Path $out)) { throw "Expected generated nut header was not created: $out" }
++    "generated $out" | Out-File $log -Append
++  }
++}
++
  function Find-VcVars64 {
    $candidates = @(
      "${env:ProgramFiles}\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat",
@@@ -171,6 +264,8 @@ if (Test-Path (Join-Path $Root "tools/build-quickjs-lib-windows.ps1")) {
    Say "no build-quickjs-lib-windows.ps1 found; continuing"
  }
  
++Patch-QuickJsHeaderForMsvcCpp
++
  Set-Location $Src
  
  function Test-SlnContent([string]$path) {
@@@ -321,7 +416,7 @@ function Invoke-MSBuildProject([System.IO.FileInfo]$proj, [string]$label) {
      $platSafe = ($p.Platform -replace '[^A-Za-z0-9]+','_')
      $log = Join-Path $LogDir "msbuild-$label-$cfgSafe-$platSafe.log"
      Say "msbuild $label cfg=$($p.Configuration) platform=$($p.Platform)"
--    & msbuild $proj.FullName /m /p:Configuration="$($p.Configuration)" /p:Platform="$($p.Platform)" /t:Build /v:minimal /nologo 2>&1 | Tee-Object -FilePath $log
++    & msbuild $proj.FullName /m /p:Configuration="$($p.Configuration)" /p:Platform="$($p.Platform)" /t:Build /v:minimal /nologo 2>&1 | Tee-Object -FilePath $log | Out-Host
      if ($LASTEXITCODE -eq 0) {
        Say "built $label with cfg=$($p.Configuration) platform=$($p.Platform)"
        return $true
@@@ -436,6 +531,7 @@ $serverProject = $serverProjects |
  
  Patch-GeneratedPythonCustomBuildCommands
  
++Ensure-ServerNutHeaders
  Build-SourceSdkDependencyProjects
  
  $beforeBuild = Get-Date