feat: готовый бренд ZoomStage и минимальный доменный подвал (refs #12)

tests/render-preland.php

@@ -0,0 +1,6 @@
+<?php
+if (PHP_SAPI !== 'cli') { http_response_code(404); exit; }
+$_SERVER['HTTP_HOST'] = $argv[1] ?? 'zoomstage.online';
+$_SERVER['SERVER_NAME'] = 'fixture.local';
+$_GET = ['theme' => $argv[2] ?? 'light', 'indpic' => '1'];
+require dirname(__DIR__) . '/index.php';