Hidden field can never be required. Skip that validation (#716)

* Hidden field can never be required. Skip that validation

* Refactor form logic editor UI with improved text and styling

- Replace UAlert with plain text description
- Update action description text
- Remove help text from select input
- Simplify note about hidden field requirements

* Add test for form logic field visibility and validation

- Implement test case for fields hidden by logic conditions
- Update AnswerFormRequest to use new FormLogicPropertyResolver method for hidden field check
- Ensure required fields are skipped when hidden by form logic

---------

Co-authored-by: Julien Nahum <julien@nahum.net>

api/app/Http/Requests/AnswerFormRequest.php

@@ -87,7 +87,10 @@ class AnswerFormRequest extends FormRequest
                     $data[$field['id']] = isset($tmpop['name']) ? $tmpop['name'] : $data[$field['id']];
                 }
             }
-            if (FormLogicPropertyResolver::isRequired($property, $data)) {
+            if (
+                FormLogicPropertyResolver::isRequired($property, $data) &&
+                !FormLogicPropertyResolver::isHidden($property, $data)
+            ) {
                 $rules[] = 'required';
 
                 if ($property['type'] == 'checkbox') {