[BUGFIX] Fix array access on RecordInterface in ContentPreviewRenderer for TYPO3 v14

In TYPO3 v14, GridColumnItem::getRecord() returns a RecordInterface object
instead of an array. The previous code used array access syntax ($record['bodytext'])
which throws "Cannot use object of type ... as array" when used without the null
coalescing operator.

Fix by detecting RecordInterface and using ->get() for v14+, keeping the original
array access path for TYPO3 v10–v13 compatibility.

Author: davidsteeb

Classes/Backend/Preview/ContentPreviewRenderer.php

@@ -13,14 +13,18 @@
  */
 
 use TYPO3\CMS\Backend\View\BackendLayout\Grid\GridColumnItem;
+use TYPO3\CMS\Core\Domain\RecordInterface;
 
 class ContentPreviewRenderer extends \TYPO3\CMS\Backend\Preview\StandardContentPreviewRenderer
 {
     public function renderPageModulePreviewContent(GridColumnItem $item): string
     {
         $record = $item->getRecord();
-        if (trim($record['bodytext'] ?? '') !== '') {
-            return $this->linkEditContent(nl2br(htmlentities($record['bodytext'])), $record) . '<br />';
+        $bodytext = $record instanceof RecordInterface
+            ? (string)($record->get('bodytext') ?? '')
+            : (string)($record['bodytext'] ?? '');
+        if (trim($bodytext) !== '') {
+            return $this->linkEditContent(nl2br(htmlentities($bodytext)), $record) . '<br />';
         }
         return parent::renderPageModulePreviewContent($item);
     }