fix: correct PDF invoice address separator and translate label

- Replace ``<br>`` with ``\n`` in ``InvoicePDF::makeAddress()`` so
  dompdf renders line breaks instead of showing raw HTML tags.
- Translate ``order number`` to ``Numéro de commande`` in the custom
  fields passed to the invoice builder.

The amount-in-words was already in English because the container
lacked French ICU data (``icu-data-full``); that was fixed at
runtime, not in code.

app/Repositories/Shop/InvoicePDF.php

@@ -19,7 +19,7 @@ class InvoicePDF
         $invoice = Invoices::getFull($id);
         $customFields = [];
         if ($orderRef = optional($invoice->order)->ref) {
-            $customFields['order number'] = $orderRef;
+            $customFields['Numéro de commande'] = $orderRef;
         }
 
         $customer = new Party([
@@ -61,7 +61,7 @@ class InvoicePDF
             trim(($address->zipcode ?? '').' '.($address->city ?? '')),
         ]);
 
-        return implode('<br>', $lines);
+        return implode("\n", $lines);
     }
 
     public static function makeItems($details)