Fix official template recognition for PDF generation

- Update isFillablePDF() to recognize ca3_official_template.pdf
- Ensure official template is used for CA-3 form generation
- Fix missing CA-3 pages in PDF output
- Use official template instead of falling back to basic PDF generation

core/class/declarationtva_pdf.class.php

@@ -286,8 +286,9 @@ class DeclarationTVA_PDF
      */
     private function isFillablePDF($pdf_path)
     {
-        // Simple check - if it's our custom template, assume it's fillable
-        return strpos($pdf_path, 'ca3_custom_template.pdf') !== false;
+        // Check if it's our template (custom or official)
+        return strpos($pdf_path, 'ca3_custom_template.pdf') !== false || 
+               strpos($pdf_path, 'ca3_official_template.pdf') !== false;
     }
 
     /**