fix(frontend): remove residual post thumbnail lazy path

inc/helpers/posts-renderer/config.php

@@ -39,7 +39,6 @@ if (!function_exists('aksrt_renderer_defaults')) {
 			'show_thumb'           => true,
 			'thumb_ratio'          => '4:3',
 			'thumb_fit'            => 'cover',
-			'thumb_lazy'           => true,
 			'thumb_if_has'         => false,
 			'target_blank'         => false,
 			'title_html'           => '',
@@ -328,9 +327,13 @@ if (!function_exists('aksrt_renderer_resolve_images')) {
 		}
 
 		$thumb_settings = class_exists('\AKSRT\Settings\Settings') ? \AKSRT\Settings\Settings::get_post_thumb_settings() : [];
-		$allow_fallback = !empty($thumb_settings['rand_thumb']) || !empty($cfg['thumb_if_has']);
-		if ($primary === '' && $allow_fallback) {
-			$primary = aksrt_renderer_random_fallback_image($post_id);
+		$fallback = sanitize_key((string) ($thumb_settings['fallback'] ?? 'placeholder'));
+		if ($primary === '' && empty($cfg['thumb_if_has'])) {
+			if ($fallback === 'random') {
+				$primary = aksrt_renderer_random_fallback_image($post_id);
+			} elseif ($fallback === 'placeholder') {
+				$primary = aksrt_get_lazy_thumb();
+			}
 		}
 
 		return [