Add --print-background flag to pagedjs-cli URL generation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Controllers/GenerateController.php

@@ -60,7 +60,9 @@ class GenerateController
             }
 
             // Retourner le PDF
+            $filename = !empty($data['filename']) ? basename($data['filename']) : 'document.pdf';
             header('Content-Type: application/pdf');
+            header('Content-Disposition: attachment; filename="' . $filename . '"');
             header('Content-Length: ' . strlen($pdf));
             echo $pdf;
 

src/Services/PdfGenerator.php

@@ -56,6 +56,7 @@ class PdfGenerator
             $cmd .= escapeshellcmd($this->config['pagedjs_bin']);
             $cmd .= ' ' . escapeshellarg($url);
             $cmd .= ' -o ' . escapeshellarg($pdfFile);
+            $cmd .= ' --print-background';
 
             if (!empty($options['timeout'])) {
                 $cmd .= ' --timeout ' . (int)$options['timeout'];