fix: align stage preland picker and demo layout

components/examples.php

@@ -1,7 +1,8 @@
 <?php
 
-$demoBasePath = rtrim($assetsUriPrefix, '/') . "/images/demo/{$indpic}";
-$demoLocalPath = __DIR__ . "/../images/demo/{$indpic}";
+$demoDirName = 'demo' . ($indpic === '1' ? '' : '-' . $indpic);
+$demoBasePath = rtrim($assetsUriPrefix, '/') . "/images/{$demoDirName}";
+$demoLocalPath = __DIR__ . "/../images/{$demoDirName}";
 
 $getAssetUrl = function (string $relativePath) use ($demoBasePath, $demoLocalPath): string {
     $fullPath = $demoLocalPath . '/' . ltrim($relativePath, '/');