add sticky thead to index, langues, and mots-clés tables

app/public/admin/actions/language.php

@@ -54,6 +54,16 @@ try {
             $db->deleteLanguage($id);
             break;
 
+        case 'delete_bulk':
+            $sourceIds = isset($_POST['selected_langs']) && is_array($_POST['selected_langs'])
+                ? array_map('intval', $_POST['selected_langs'])
+                : [];
+            if (empty($sourceIds)) throw new Exception("Aucune langue sélectionnée.");
+            foreach ($sourceIds as $sid) {
+                $db->deleteLanguage($sid);
+            }
+            break;
+
         default:
             throw new Exception("Action inconnue.");
     }