roles guard + docs + logo

app/inventory/api/engine/manage_product.php

@@ -4,6 +4,8 @@
     require '../../../assets/utils/classes/FileUploader.php';
     require '../../../assets/utils/classes/ProductManager.php';
 
+    require_role($user_role, ['owner', 'admin']);
+
     $id            = (int)$data['id'];
     $min_stock     = (float)($data['min_stock']     ?? 0);
     $reorder_point = (float)($data['reorder_point'] ?? 0);
@@ -68,4 +70,4 @@
     }
 
     exit(json_encode($answer));
-?>
+?>