fix: verify staged demo asset sets

tests/check-demo-layout.php

@@ -42,6 +42,17 @@ if (!str_contains($template, $pathBuilder)
     $failures[] = 'Template и examples должны строить путь из Index-совместимого имени demo/demo-N.';
 }
 
+$workflow = (string) file_get_contents($root . '/.gitea/workflows/deploy.yml');
+foreach ([
+    '"$PRELAND_URL/images/demo/1/source.avif"',
+    '"$PRELAND_URL/images/demo-2/1/source.avif"',
+    '"$PRELAND_URL/?indpic=2&nc=$(date +%s)"',
+] as $requiredStageSmokeCheck) {
+    if (!str_contains($workflow, $requiredStageSmokeCheck)) {
+        $failures[] = "Stage-деплой обязан проверять публикацию {$requiredStageSmokeCheck}.";
+    }
+}
+
 if ($failures !== []) {
     fwrite(STDERR, "FAILED\n- " . implode("\n- ", $failures) . "\n");
     exit(1);