changes

fusion_rental/models/sale_order.py

@@ -1408,10 +1408,10 @@ class SaleOrder(models.Model):
                 pdf_content, _ = inv_report._render_qweb_pdf(
                     inv_report.report_name, [invoice.id]
                 )
-                inv_filename = (
-                    f"{self.name} - {type_label} - "
-                    f"{invoice.name or 'Draft'}.pdf"
-                )
+                name_parts = (self.partner_id.name or 'Client').strip().split()
+                first = name_parts[0] if name_parts else 'Client'
+                last = name_parts[-1] if len(name_parts) > 1 else ''
+                inv_filename = f"{first}_{last}_{type_label}_{invoice.name or 'Draft'}.pdf"
                 inv_attach = self.env['ir.attachment'].create({
                     'name': inv_filename,
                     'type': 'binary',