feat(admin): plate moderator roles, advanced limits, coupon scope edit/batch

inc/classes/forum/board-service-traits/trait-aksrt-forum-board-service-part-2.php

@@ -252,10 +252,15 @@ trait AKSRT_Forum_Board_Service_Part_2 {
         }
 
         $add_limit = (string) (get_post_meta($plate_id, '_aksrt_add_limit', true) ?: 'all');
-        if ($add_limit === 'all') {
+        if ($add_limit === 'all' || $add_limit === 'login') {
             return true;
         }
 
+        // Moderators already returned true above.
+        if ($add_limit === 'moderator') {
+            return false;
+        }
+
         $user = get_userdata($user_id);
         if (!$user) {
             return false;
@@ -269,7 +274,8 @@ trait AKSRT_Forum_Board_Service_Part_2 {
             return !empty(array_intersect($user->roles, $allowed_roles));
         }
 
-        return true;
+        // Unknown contract → deny (no legacy fallthrough).
+        return false;
     }
 
     /**