Fix printer detection, implement portable deployment with SumatraPDF

- Fixed network printer enumeration (PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS)
- Added printer name truncation to 20 chars with full name mapping
- Implemented silent PDF printing using SumatraPDF with landscape orientation
- Added auto-dismiss for success popup (3 seconds)
- Bundled SumatraPDF inside executable for portable single-file deployment
- Updated build script to embed SumatraPDF
- Added setup_sumatra.ps1 for downloading SumatraPDF portable
- Added DEPLOYMENT.md documentation

build_windows.ps1

@@ -47,13 +47,39 @@ if ($LASTEXITCODE -ne 0) {
 }
 Write-Host ""
 
-Write-Host "[4/5] Cleaning old build artifacts..." -ForegroundColor Cyan
+Write-Host "[4/6] Checking for SumatraPDF..." -ForegroundColor Cyan
+$sumatraPath = "SumatraPDF\SumatraPDF.exe"
+if (-not (Test-Path $sumatraPath)) {
+    Write-Host ""
+    Write-Host "WARNING: SumatraPDF not found!" -ForegroundColor Yellow
+    Write-Host "SumatraPDF is required for silent PDF printing." -ForegroundColor Yellow
+    Write-Host ""
+    Write-Host "Run the setup script first:" -ForegroundColor Yellow
+    Write-Host "  powershell -ExecutionPolicy Bypass -File setup_sumatra.ps1" -ForegroundColor Cyan
+    Write-Host ""
+    $response = Read-Host "Continue building without SumatraPDF? (y/n)"
+    if ($response -ne "y") {
+        Write-Host "Build cancelled."
+        Read-Host "Press Enter to exit"
+        exit 1
+    }
+    Write-Host ""
+    Write-Host "Building without SumatraPDF (PDF printing will not work)..." -ForegroundColor Yellow
+    $addBinaryArg = @()
+} else {
+    Write-Host "Found: $sumatraPath" -ForegroundColor Green
+    # Add SumatraPDF as bundled binary (will be embedded inside the exe)
+    $addBinaryArg = @("--add-binary", "$sumatraPath;.")
+}
+Write-Host ""
+
+Write-Host "[5/6] Cleaning old build artifacts..." -ForegroundColor Cyan
 if (Test-Path "dist") { Remove-Item -Recurse -Force "dist" }
 if (Test-Path "build") { Remove-Item -Recurse -Force "build" }
 Remove-Item -Force "*.spec" -ErrorAction SilentlyContinue
 Write-Host ""
 
-Write-Host "[5/5] Building executable with PyInstaller..." -ForegroundColor Cyan
+Write-Host "[6/6] Building executable with PyInstaller..." -ForegroundColor Cyan
 Write-Host "This may take 5-15 minutes, please wait..."
 Write-Host ""
 
@@ -73,6 +99,11 @@ $pyinstallerArgs = @(
     "-y"
 )
 
+# Add SumatraPDF binary if available (bundles inside the exe)
+if ($addBinaryArg) {
+    $pyinstallerArgs += $addBinaryArg
+}
+
 pyinstaller @pyinstallerArgs
 if ($LASTEXITCODE -ne 0) {
     Write-Host ""