feat: guard to prevent premature form submissions while uploading

templates/administrative/system/document/modal_replace.html.twig

@@ -3,7 +3,8 @@
 {% block title %}Dokument ersetzen{% endblock %}
 
 {% block content %}
-    {{ form_start(form, { 'attr': { 'hx-post': app.request.uri, 'hx-target': '#htmx-modal', 'hx-swap': 'outerHTML' } }) }}
+    {% set formAttr = stimulus_controller('form-upload-guard')|stimulus_action('form-upload-guard', 'guard', 'submit') %}
+    {{ form_start(form, { 'attr': { 'hx-post': app.request.uri, 'hx-target': '#htmx-modal', 'hx-swap': 'outerHTML' }|merge(formAttr.toArray()) }) }}
     <div class="pb-4">
         {% include '_partials/_upload_collection_form.html.twig' with {
             'endpoint_upload': path('_uploader_upload_document'),
@@ -12,7 +13,7 @@
             'accepted_files': 'application/pdf',
         } %}
     </div>
-    <button type="submit" class="btn">
+    <button type="submit" class="btn" {{ stimulus_target('form-upload-guard', 'submit') }}>
         ersetzen
     </button>
     {{ form_rest(form) }}