refactor: use correct contact person in mails

src/QUI/ERP/Accounting/Invoice/Output/OutputProviderInvoice.php

@@ -316,13 +316,19 @@ public static function getMailBody($entityId)
      */
     protected static function getInvoiceLocaleVar($Invoice, $Customer): array
     {
-        $user = $Customer->getName();
-        $user = \trim($user);
+        $CustomerAddress = $Customer->getAddress();
+        $user            = $CustomerAddress->getAttribute('contactPerson');
+
+        if (empty($user)) {
+            $user = $Customer->getName();
+        }
 
         if (empty($user)) {
             $user = $Customer->getAddress()->getName();
         }
 
+        $user = \trim($user);
+
         // contact person
         $contactPerson = $Invoice->getAttribute('contact_person');
 
@@ -394,13 +400,18 @@ public static function getCustomerVariables(QUI\ERP\User $Customer): array
         $Address = $Customer->getAddress();
 
         // customer name
-        $user = $Customer->getName();
-        $user = \trim($user);
+        $user = $Address->getAttribute('contactPerson');
+
+        if (empty($user)) {
+            $user = $Customer->getName();
+        }
 
         if (empty($user)) {
             $user = $Address->getName();
         }
 
+        $user = \trim($user);
+
         // email
         $email = $Customer->getAttribute('email');
 
@@ -412,7 +423,6 @@ public static function getCustomerVariables(QUI\ERP\User $Customer): array
             }
         }
 
-
         return [
             'user'          => $user,
             'name'          => $user,