Harden Windows icon resource generation

scripts/build-windows.sh

@@ -71,6 +71,9 @@ if [ -f "$RC_FILE" ]; then
     else
         echo "WARNING: windres not found; Windows icon will not be embedded in the EXE"
     fi
+    if [ ! -f "$SYMBOL_FILE" ]; then
+        echo "WARNING: windres did not produce $SYMBOL_FILE; icon may be missing"
+    fi
 fi
 
 # Set Windows build environment

scripts/build.bat

@@ -177,9 +177,23 @@ echo.
 REM ----------------------------
 REM Embed Windows icon (if windres is available)
 REM ----------------------------
+set WINDRES_PATH=
 where windres >nul 2>&1
 if %ERRORLEVEL% equ 0 (
-    windres scripts\videotools.rc -O coff -o videotools_windows_amd64.syso
+    for /f "delims=" %%I in ('where windres') do set WINDRES_PATH=%%I
+) else if exist "C:\msys64\mingw64\bin\windres.exe" (
+    set WINDRES_PATH=C:\msys64\mingw64\bin\windres.exe
+) else if exist "C:\msys64\usr\bin\windres.exe" (
+    set WINDRES_PATH=C:\msys64\usr\bin\windres.exe
+) else if exist "C:\MinGW\bin\windres.exe" (
+    set WINDRES_PATH=C:\MinGW\bin\windres.exe
+)
+
+if not "%WINDRES_PATH%"=="" (
+    "%WINDRES_PATH%" scripts\videotools.rc -O coff -o videotools_windows_amd64.syso
+    if not exist videotools_windows_amd64.syso (
+        echo [WARN] windres did not produce videotools_windows_amd64.syso; icon may be missing
+    )
 ) else (
     echo [WARN] windres not found; Windows icon will not be embedded in the EXE
 )

scripts/build.ps1

@@ -60,9 +60,22 @@ Write-Host ""
 $rcFile = Join-Path $PROJECT_ROOT "scripts\videotools.rc"
 $sysoFile = Join-Path $PROJECT_ROOT "videotools_windows_amd64.syso"
 if (Test-Path $rcFile) {
-    $windres = Get-Command windres -ErrorAction SilentlyContinue
-    if ($windres) {
-        & $windres.Path $rcFile -O coff -o $sysoFile | Out-Null
+    $windresCandidates = @()
+    $windresCmd = Get-Command windres -ErrorAction SilentlyContinue
+    if ($windresCmd) {
+        $windresCandidates += $windresCmd.Path
+    }
+    $windresCandidates += @(
+        "C:\msys64\mingw64\bin\windres.exe",
+        "C:\msys64\usr\bin\windres.exe",
+        "C:\MinGW\bin\windres.exe"
+    )
+    $windresPath = $windresCandidates | Where-Object { $_ -and (Test-Path $_) } | Select-Object -First 1
+    if ($windresPath) {
+        & $windresPath $rcFile -O coff -o $sysoFile | Out-Null
+        if (-not (Test-Path $sysoFile)) {
+            Write-Host "⚠️  windres did not produce $sysoFile; icon may be missing" -ForegroundColor Yellow
+        }
     } else {
         Write-Host "⚠️  windres not found; Windows icon will not be embedded in the EXE" -ForegroundColor Yellow
     }