fix(db): correct $wpdb->prepare usage in forum board and API audit

- Bind _aksrt_moderators with %s in get_user_managed_plates (stops 4× user-home notices)
- Guard API audit COUNT when no filter values (credits pattern)

inc/classes/class-aksrt-api-audit.php

@@ -214,9 +214,10 @@ class AKSRT_API_Audit {
         $where_sql = implode(' AND ', $where);
         $offset = ($args['page'] - 1) * $args['per_page'];
 
-        $total = (int) $wpdb->get_var(
-            $wpdb->prepare("SELECT COUNT(*) FROM " . self::$table_name . " WHERE {$where_sql}", $values)
-        );
+        $count_sql = "SELECT COUNT(*) FROM " . self::$table_name . " WHERE {$where_sql}";
+        $total = (int) ($values
+            ? $wpdb->get_var($wpdb->prepare($count_sql, $values))
+            : $wpdb->get_var($count_sql));
 
         $values[] = $args['per_page'];
         $values[] = $offset;

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

@@ -699,7 +699,8 @@ trait AKSRT_Forum_Board_Service_Part_2 {
         $mod_plate_ids = $wpdb->get_col($wpdb->prepare(
             "SELECT pm.post_id FROM {$wpdb->postmeta} pm
              INNER JOIN {$wpdb->posts} p ON p.ID = pm.post_id AND p.post_type = 'aksrt_forum_plate' AND p.post_status = 'publish'
-             WHERE pm.meta_key = '_aksrt_moderators'",
+             WHERE pm.meta_key = %s",
+            '_aksrt_moderators'
         ));
 
         foreach ($mod_plate_ids as $plate_id) {