api#347: передавать и настраивать UTM part без ссылки в Preland

tests/render-preland.php

@@ -3,4 +3,6 @@ if (PHP_SAPI !== 'cli') { http_response_code(404); exit; }
 $_SERVER['HTTP_HOST'] = $argv[1] ?? 'zoomstage.online';
 $_SERVER['SERVER_NAME'] = 'fixture.local';
 $_GET = ['theme' => 'abcd' . (($argv[2] ?? 'light') === 'dark' ? '1' : '2'), 'indpic' => 'abcd1'];
+if (isset($argv[3])) $_GET['part'] = $argv[3];
+if (isset($argv[4])) $_GET['lang'] = $argv[4];
 require dirname(__DIR__) . '/index.php';