feat(admin): topic governance meta box and product category term fields

Add native side meta box for forum topics (plate/sticky/lock/review/pay
visibility) and taxonomy form fields for aksrt_product_cat inheritance
settings. Source-only changes; no SPA build artifacts.

functions.php

@@ -311,6 +311,11 @@ if (is_admin() && class_exists('AKSRT_Plate_Meta_Box')) {
 if (is_admin() && class_exists('AKSRT_Topic_Admin_List')) {
     AKSRT_Topic_Admin_List::get_instance()->init();
 }
+// 论坛帖子治理 meta box
+if (is_admin() && class_exists('AKSRT_Topic_Meta_Box')) {
+    AKSRT_Topic_Meta_Box::get_instance()->init();
+}
+