Build bitmap lib for Win32 Proton DLLs

ddiff --git a/docs/WINDOWS_WIN32_BITMAP_LIB_FIX.md b/docs/WINDOWS_WIN32_BITMAP_LIB_FIX.md
nnew file mode 100644
iindex 0000000..a043652
---- /dev/null
++++ b/docs/WINDOWS_WIN32_BITMAP_LIB_FIX.md
@@@ -0,0 +1,7 @@
++# Windows Win32 bitmap.lib fix
++
++The Win32/Proton DLL build converts VPC's generated win64 projects to Win32 before MSBuild.
++After conversion, the HL2MP client links against `..\..\lib\public\bitmap.lib`.
++
++This patch adds the generated bitmap project to the dependency build list and copies
++`bitmap.lib` into the target public library directory before building `client.dll`.
ddiff --git a/tools/build-sdk-windows.ps1 b/tools/build-sdk-windows.ps1
iindex 236f406..97f0be3 100644
---- a/tools/build-sdk-windows.ps1
++++ b/tools/build-sdk-windows.ps1
@@@ -547,7 +547,13 @@ function Copy-LibIfNeeded([string]$libName, [string]$destDir) {
    if (Test-Path $dest) { return }
    $found = Get-ChildItem -Path $Sdk -Recurse -File -Filter $libName -ErrorAction SilentlyContinue |
      Where-Object { $_.FullName -notmatch "artifacts|windows-build-debug|_deps" } |
--    Sort-Object LastWriteTime -Descending |
++    Sort-Object @{ Expression = {
++      if ($script:OpenVibeTargetArch -eq "x86") {
++        if ($_.FullName -match "\x64\|/x64/|win64|x64") { 1 } else { 0 }
++      } else {
++        if ($_.FullName -match "\x64\|/x64/|win64|x64") { 0 } else { 1 }
++      }
++    } }, LastWriteTime -Descending |
      Select-Object -First 1
    if ($found) {
      Say "copying fallback lib $($found.FullName) -> $dest"
@@@ -555,12 +561,14 @@ function Copy-LibIfNeeded([string]$libName, [string]$destDir) {
    }
  }
  
++# OPENVIBE_WIN32_BITMAP_LIB_DEP_PATCH
  function Build-SourceSdkDependencyProjects {
    Say "building Source SDK dependency libraries before HL2MP client/server"
  
    $patterns = @(
      "tier1*.vcxproj",
      "mathlib*.vcxproj",
++    "bitmap*.vcxproj",
      "raytrace*.vcxproj",
      "vgui_controls*.vcxproj",
      "matsys_controls*.vcxproj",
@@@ -583,6 +591,7 @@ function Build-SourceSdkDependencyProjects {
  
    $publicLibDir = if ($script:OpenVibeTargetArch -eq "x86") { Join-Path $Src "lib/public" } else { Join-Path $Src "lib/public/x64" }
    Copy-LibIfNeeded "mathlib.lib" $publicLibDir
++  Copy-LibIfNeeded "bitmap.lib" $publicLibDir
    Copy-LibIfNeeded "tier1.lib" $publicLibDir
    Copy-LibIfNeeded "raytrace.lib" $publicLibDir
    Copy-LibIfNeeded "vgui_controls.lib" $publicLibDir
ddiff --git a/tools/fix-win32-build-missing-bitmap-lib-and-install.sh b/tools/fix-win32-build-missing-bitmap-lib-and-install.sh
nnew file mode 100755
iindex 0000000..29e6e3e
---- /dev/null
++++ b/tools/fix-win32-build-missing-bitmap-lib-and-install.sh
@@@ -0,0 +1,127 @@
++#!/usr/bin/env bash
++set -euo pipefail
++
++say() { echo "[openvibe] $*"; }
++warn() { echo "[openvibe warn] $*" >&2; }
++fail() { echo "[openvibe error] $*" >&2; exit 1; }
++
++ROOT="${OPENVIBE_ROOT:-$HOME/src/openvibe-source}"
++cd "$ROOT"
++BRANCH="${OPENVIBE_BRANCH:-$(git rev-parse --abbrev-ref HEAD)}"
++REPO="${OPENVIBE_REPO:-$(tools/openvibe-gh-repo.sh)}"
++WORKFLOW="${OPENVIBE_WORKFLOW:-windows-source-sdk-dlls.yml}"
++BUILD_PS1="tools/build-sdk-windows.ps1"
++
++say "fix Win32 build: build/copy bitmap.lib before client link"
++say "root=$ROOT"
++say "branch=$BRANCH"
++say "repo=$REPO"
++
++command -v python3 >/dev/null 2>&1 || fail "python3 is required"
++command -v gh >/dev/null 2>&1 || fail "GitHub CLI gh is required"
++[[ -f "$BUILD_PS1" ]] || fail "missing $BUILD_PS1"
++
++python3 - <<'PY'
++from pathlib import Path
++p = Path('tools/build-sdk-windows.ps1')
++s = p.read_text()
++orig = s
++
++# Add bitmap project to the dependency build list. Client links ..\..\lib\public\bitmap.lib.
++if '"bitmap*.vcxproj"' not in s:
++    anchor = '    "mathlib*.vcxproj",\n'
++    if anchor not in s:
++        raise SystemExit('could not find dependency patterns anchor near mathlib*.vcxproj')
++    s = s.replace(anchor, anchor + '    "bitmap*.vcxproj",\n', 1)
++
++# Ensure bitmap.lib is copied into the public lib dir after dependency builds.
++if 'Copy-LibIfNeeded "bitmap.lib"' not in s:
++    anchor = '  Copy-LibIfNeeded "mathlib.lib" $publicLibDir\n'
++    if anchor not in s:
++        raise SystemExit('could not find Copy-LibIfNeeded anchor near mathlib.lib')
++    s = s.replace(anchor, anchor + '  Copy-LibIfNeeded "bitmap.lib" $publicLibDir\n', 1)
++
++# Improve fallback search ordering for libs: prefer target arch output dirs over stale x64.
++old = '''  $found = Get-ChildItem -Path $Sdk -Recurse -File -Filter $libName -ErrorAction SilentlyContinue |
++    Where-Object { $_.FullName -notmatch "artifacts|windows-build-debug|_deps" } |
++    Sort-Object LastWriteTime -Descending |
++    Select-Object -First 1
++'''
++new = '''  $found = Get-ChildItem -Path $Sdk -Recurse -File -Filter $libName -ErrorAction SilentlyContinue |
++    Where-Object { $_.FullName -notmatch "artifacts|windows-build-debug|_deps" } |
++    Sort-Object @{ Expression = {
++      if ($script:OpenVibeTargetArch -eq "x86") {
++        if ($_.FullName -match "\\x64\\|/x64/|win64|x64") { 1 } else { 0 }
++      } else {
++        if ($_.FullName -match "\\x64\\|/x64/|win64|x64") { 0 } else { 1 }
++      }
++    } }, LastWriteTime -Descending |
++    Select-Object -First 1
++'''
++if old in s and new not in s:
++    s = s.replace(old, new, 1)
++
++# Add an explicit diagnostic line so we can tell this patch ran.
++marker = '# OPENVIBE_WIN32_BITMAP_LIB_DEP_PATCH'
++if marker not in s:
++    s = s.replace('function Build-SourceSdkDependencyProjects {\n', f'{marker}\nfunction Build-SourceSdkDependencyProjects {{\n', 1)
++
++if s != orig:
++    p.write_text(s)
++    print('[patched] tools/build-sdk-windows.ps1')
++else:
++    print('[openvibe] tools/build-sdk-windows.ps1 already patched')
++PY
++
++mkdir -p docs
++cat > docs/WINDOWS_WIN32_BITMAP_LIB_FIX.md <<'DOC'
++# Windows Win32 bitmap.lib fix
++
++The Win32/Proton DLL build converts VPC's generated win64 projects to Win32 before MSBuild.
++After conversion, the HL2MP client links against `..\..\lib\public\bitmap.lib`.
++
++This patch adds the generated bitmap project to the dependency build list and copies
++`bitmap.lib` into the target public library directory before building `client.dll`.
++DOC
++
++say "git diff summary"
++git diff --stat
++
++git add tools/build-sdk-windows.ps1 docs/WINDOWS_WIN32_BITMAP_LIB_FIX.md tools/fix-win32-build-missing-bitmap-lib-and-install.sh 2>/dev/null || true
++if ! git diff --cached --quiet; then
++  git commit -m "Build bitmap lib for Win32 Proton DLLs"
++  git push origin "$BRANCH"
++else
++  say "no commit needed"
++fi
++
++HEAD="$(git rev-parse HEAD)"
++say "head=$HEAD"
++say "triggering Win32 workflow"
++gh workflow run "$WORKFLOW" --repo "$REPO" --ref "$BRANCH" -f diagnostics=1 || true
++
++RUN_ID=""
++for _ in $(seq 1 60); do
++  RUN_ID="$(gh run list --repo "$REPO" --workflow "$WORKFLOW" --branch "$BRANCH" --commit "$HEAD" --limit 10 --json databaseId,createdAt,status --jq 'sort_by(.createdAt) | last | .databaseId' 2>/dev/null || true)"
++  if [[ -n "$RUN_ID" && "$RUN_ID" != "null" ]]; then
++    break
++  fi
++  sleep 5
++done
++[[ -n "$RUN_ID" && "$RUN_ID" != "null" ]] || fail "could not find workflow run for commit $HEAD"
++
++say "watching run $RUN_ID"
++if ! gh run watch "$RUN_ID" --repo "$REPO" --exit-status; then
++  warn "workflow failed; downloading diagnostics"
++  tools/windows-workflow-debug-and-install.sh "$RUN_ID" || true
++  fail "Win32 DLL workflow failed"
++fi
++
++say "workflow passed; installing PE32 OpenVibe DLLs"
++OPENVIBE_EXPECT_DLL_ARCH=x86 tools/install-latest-openvibe-windows-dlls.sh "$RUN_ID"
++
++say "done. Now fully close hl2.exe/Proton, relaunch, and test:"
++echo 'OPENVIBE_PROTON_LOG=1 OPENVIBE_CLIENT_MODE=proton tools/run-client-auto.sh 127.0.0.1 27015'
++echo 'ov_help'
++echo 'ov_join hub'
++echo 'ov_menu'