/**
 * Register a custom taxonomy for Lightroom collections/folders.
 */
add_action( 'init', function() {
    register_taxonomy( 'lightroom_collections', [ 'attachment' ], [
        'labels' => [
            'name'          => 'Lightroom Collections',
            'singular_name' => 'Lightroom Collection',
            'menu_name'     => 'Lightroom Collections',
            'add_new_item'  => 'Add New Lightroom Collection',
            'search_items'  => 'Search Lightroom Collections',
        ],
        'public'             => true,
        'show_ui'            => true,
        'show_admin_column'  => true,
        'show_in_rest'       => true, // ✅ exposes it to Gutenberg + REST API
        'hierarchical'       => true, // behaves like categories
        'rewrite'            => [ 'slug' => 'lightroom-collection' ],
    ] );
});