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

[davidsteeb]

Problem

In TYPO3 v14, GridColumnItem::getRecord() returns a RecordInterface object instead of an array. The ContentPreviewRenderer::renderPageModulePreviewContent() method used PHP array access syntax on the record:

if (trim($record['bodytext'] ?? '') !== '') {
    return $this->linkEditContent(nl2br(htmlentities($record['bodytext'])), $record) . '<br />';
}

• The condition silently returned null (due to ??) but the inner expression $record['bodytext'] (without ??) would throw Cannot use object of type TYPO3\CMS\Core\Domain\Record as array if the condition ever evaluated to true.
• Additionally, RecordInterface never implements ArrayAccess, making the ?? fallback behaviour version-dependent.

Fix

Detect whether the record is a RecordInterface (TYPO3 v14+) and use ->get() in that case, keeping the original array access path for TYPO3 v10–v13 compatibility. Note that linkEditContent() also had its signature updated in v14 to accept RecordInterface instead of array, so passing $record directly works correctly in all supported versions.

Compatibility

• TYPO3 v10.4 / v11.5 / v12.x / v13.x: $record is an array → uses $record['bodytext'] path
• TYPO3 v14.x: $record is a RecordInterface → uses $record->get('bodytext') path