chore: complete M1.1 runtime QA and release packaging

shop/xshop-theme/template-parts/components/empty-state.php

@@ -0,0 +1,23 @@
+<?php
+/**
+ * Empty state — no posts / no results.
+ *
+ * @package XShop
+ */
+
+declare(strict_types=1);
+
+defined('ABSPATH') || exit;
+
+$title = $args['title'] ?? esc_html__('Nothing found', 'xshop');
+$text  = $args['text'] ?? esc_html__('Try adjusting your search or browse categories.', 'xshop');
+$ctaLabel = $args['cta_label'] ?? '';
+$ctaUrl   = $args['cta_url'] ?? '';
+?>
+<div class="xshop-empty" role="status">
+  <h2 class="xshop-empty__title"><?php echo esc_html($title); ?></h2>
+  <p class="xshop-empty__text"><?php echo esc_html($text); ?></p>
+  <?php if ($ctaLabel !== '' && $ctaUrl !== ''): ?>
+    <a class="xshop-btn xshop-btn--primary" href="<?php echo esc_url($ctaUrl); ?>"><?php echo esc_html($ctaLabel); ?></a>
+  <?php endif; ?>
+</div>