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, '/');

components/form.php

@@ -7,7 +7,7 @@ $createApiUrl = ($apiHost ?? '') . '/api/images/public/create';
 $uploadPolicyApiUrl = ($apiHost ?? '') . '/api/images/public/upload-policy';
 $redirectUrlBase = $redirect_url_base ?? '';
 $redirectUrlUtm = $redirect_url_utm ?? '';
-$basePickerAccept = 'image/jpeg,image/png,image/gif,image/webp,image/bmp,image/avif,image/heic,image/heif,image/jxl,image/tiff,.jpg,.jpeg,.png,.gif,.webp,.bmp,.avif,.heic,.heif,.jxl,.tif,.tiff,.dng';
+$basePickerAccept = 'image/jpeg,image/png,image/gif,image/webp,image/bmp,image/avif,image/heic,image/heif,image/jxl,image/tiff,application/pdf,.pdf,.jpg,.jpeg,.png,.gif,.webp,.bmp,.avif,.heic,.heif,.jxl,.tif,.tiff,.dng';
 
 ?>