feat(admin): express timeline, coupon scope, plate/topic permission fields

Native shipping can query/show express timelines; coupons accept
include/exclude/category product_scope; plate meta gains allow_view and
add_limit; topic list shows visibility column.

inc/classes/forum/class-aksrt-topic-admin-list.php

@@ -46,6 +46,7 @@ class AKSRT_Topic_Admin_List {
                 $new['aksrt_locked']  = __('锁定', 'aksrt');
                 $new['aksrt_review']  = __('审核', 'aksrt');
                 $new['aksrt_bbs_type']= __('类型', 'aksrt');
+                $new['aksrt_visibility'] = __('可见性', 'aksrt');
                 $new['aksrt_views']   = __('阅读', 'aksrt');
             }
         }
@@ -116,6 +117,20 @@ class AKSRT_Topic_Admin_List {
                 echo esc_html($type === 'question' ? __('提问', 'aksrt') : __('标准', 'aksrt'));
                 break;
 
+            case 'aksrt_visibility':
+                $visibility = (string) (get_post_meta($post_id, '_aksrt_visibility', true) ?: 'public');
+                $map = [
+                    'public'    => __('公开', 'aksrt'),
+                    'login'     => __('登录', 'aksrt'),
+                    'comment'   => __('评论', 'aksrt'),
+                    'role'      => __('角色', 'aksrt'),
+                    'credits'   => __('积分', 'aksrt'),
+                    'pay'       => __('付费', 'aksrt'),
+                    'moderator' => __('版主', 'aksrt'),
+                ];
+                echo esc_html($map[$visibility] ?? $visibility);
+                break;
+
             case 'aksrt_views':
                 echo esc_html((string) (int) get_post_meta($post_id, '_aksrt_views', true));
                 break;