// ============================================================
// WPUF / WPUF Pro 界面英文 -> 中文（gettext 翻译补充，升级不丢失）
// ============================================================
function cpe_wpuf_zh( $translated, $text, $domain ) {
    if ( 'wpuf-pro' === $domain || 'wp-user-frontend' === $domain ) {
        $map = array(
            'Change Password'   => '更改密码',
            'Edit Profile'      => '编辑个人资料',
            'Billing Address'   => '账单地址',
            'Log out'           => '退出登录',
            'My Invoices'       => '我的发票',
            'Invoices'          => '发票',
            'No invoices found' => '未找到发票',
            'Transaction ID'    => '交易编号',
            'Link'              => '链接',
            'Amount'            => '金额',
            'Options'           => '操作',
            'View'              => '查看',
            'N/A'               => '无',
            'View Invoice'      => '查看发票',
            'Download'          => '下载',
            'Previous'          => '上一页',
            'Next'              => '下一页',
            'Dashboard'         => '仪表盘',
            'Subscription'      => '订阅',
        );
        if ( isset( $map[ $text ] ) ) {
            return $map[ $text ];
        }
    }
    return $translated;
}
add_filter( 'gettext', 'cpe_wpuf_zh', 10, 3 );

function cpe_wpuf_zh_n( $translated, $single, $plural, $number, $domain = '' ) {
    if ( 'wpuf-pro' === $domain || 'wp-user-frontend' === $domain ) {
        if ( '%s item' === $single && '%s items' === $plural ) {
            return '%s 条';
        }
    }
    return $translated;
}
add_filter( 'ngettext', 'cpe_wpuf_zh_n', 10, 5 );