// Handle bulk delete action
if (isset($_POST['action']) && $_POST['action'] === 'delete' && !empty($_POST['pfqt_selected'])) {
    $selected_indexes = array_map('intval', $_POST['pfqt_selected']);
    $questions = get_option('product_faq_questions', []);
    foreach ($selected_indexes as $index) {
        if (isset($questions[$index])) {
            unset($questions[$index]);
        }
    }
    update_option('product_faq_questions', array_values($questions)); // reindex
    echo '<div class="updated"><p>Selected questions deleted.</p></div>';
}