feat(forum): topic list widget AJAX load-more like zibll

Shared query_payload + REST /forum/frontend/widgets/topics wired
to ajax-list for sidebar forum posts lists.

src/AKSRT/Forum/Forum.php

@@ -246,6 +246,40 @@ class Forum {
         $this->view_builder()->ajax_board_topics();
     }
 
+    public function register_widget_routes(): void {
+        register_rest_route('aksrt/v1', '/forum/frontend/widgets/topics', [
+            'methods'             => 'GET',
+            'callback'            => [$this, 'rest_widget_topics'],
+            'permission_callback' => '__return_true',
+        ]);
+    }
+
+    public function rest_widget_topics(\WP_REST_Request $request) {
+        if (!class_exists('\AKSRT\Widgets\WidgetForumTopicLists')) {
+            return new \WP_REST_Response(['success' => false, 'message' => 'widget unavailable'], 500);
+        }
+        $instance = [
+            'count'    => max(1, min(30, (int) ($request->get_param('count') ?? 8))),
+            'orderby'  => sanitize_key((string) ($request->get_param('orderby') ?? 'date')),
+            'style'    => sanitize_key((string) ($request->get_param('style') ?? 'mini')),
+            'plate_id' => max(0, (int) ($request->get_param('plate_id') ?? 0)),
+            'paginate' => sanitize_key((string) ($request->get_param('paginate') ?? 'ajax')),
+        ];
+        $page = max(1, (int) ($request->get_param('page') ?? $request->get_param('paged') ?? 1));
+        $payload = \AKSRT\Widgets\WidgetForumTopicLists::query_payload($instance, $page);
+        return new \WP_REST_Response([
+            'success' => true,
+            'html' => (string) ($payload['html'] ?? ''),
+            'paginate_html' => (string) ($payload['paginate_html'] ?? ''),
+            'has_more' => !empty($payload['has_more']),
+            'page' => (int) ($payload['page'] ?? $page),
+            'max_pages' => (int) ($payload['max_pages'] ?? 1),
+            'total' => (int) ($payload['total'] ?? 0),
+        ], 200);
+    }
+
+
+
     public function render_board_cards(array $boards): void {
         $this->view_builder()->render_board_cards($boards);
     }
@@ -396,6 +430,7 @@ class Forum {
         // Public plate/board topic list (sort tabs)
         add_action('wp_ajax_aksrt_forum_board_topics', [$this, 'ajax_board_topics']);
         add_action('wp_ajax_nopriv_aksrt_forum_board_topics', [$this, 'ajax_board_topics']);
+        add_action('rest_api_init', [$this, 'register_widget_routes']);
 
         add_action('admin_init', [$this, 'maybe_migrate_boards'], 25);
         add_filter('template_include', [$this, 'template_routing']);