feat(shop): category filter bar + sort/load-more 1:1 UX

Port zibll hierarchical cat tabs, multi-metric sort with price toggle,
skeleton/empty states, and REST archive payload (header/html/paginate)
while reusing product-card template for AJAX HTML.

src/AKSRT/Shop/ProductReview.php

@@ -85,7 +85,8 @@ class ProductReview {
             update_comment_meta($comment_id, '_aksrt_review_images', $images);
         }
 
-        $this->refresh_product_scores($product_id);
+        $scores = $this->refresh_product_scores($product_id);
+        update_post_meta($product_id, '_aksrt_score_average', (float) ($scores['average'] ?? $average));
 
         if (class_exists('\AKSRT\Payment\OrderRepository')) {
             $order = \AKSRT\Payment\OrderRepository::get_instance()->get($order_number);