feat(topics): restore topic taxonomy workflow

inc/core-hooks.php

@@ -385,11 +385,6 @@ add_action('pre_get_posts', function ($query) {
     // 站内搜索：分类/标签名搜索（内容类型始终为 post）
     if ($query->is_search() && empty($query->get('post_type'))) {
         $search_type = sanitize_key((string) $query->get('type'));
-        $trem = absint($query->get('trem'));
-        if ($trem > 0) {
-            $query->set('cat', $trem);
-        }
-
         if (in_array($search_type, ['category', 'tag'], true)) {
             $taxonomy = $search_type === 'category' ? 'category' : 'post_tag';
             $term_ids = get_terms([