Merge branch 'next-2.x' into 'main'

fix: ensure option 'selected' key is set in AttributeGroupFrontendView

See merge request !111

src/QUI/ERP/Products/Field/Types/AttributeGroupFrontendView.php

@@ -135,6 +135,10 @@ public function create(): string
             $disabled = '';
             $userInput = '';
 
+            if (!isset($option['selected'])) {
+                $option['selected'] = false;
+            }
+
             if (
                 $option['selected']
                 || $value === $option['valueId']