feat(admin): native paid-post sales report page

Add aksrt_pay_products under payment center for content-pay posts
(resource orders), with order aggregation and deep-link filters.

inc/classes/admin/native/class-aksrt-admin-pay-menus.php

@@ -54,6 +54,17 @@ class AKSRT_Admin_Pay_Menus {
                     wp_die(esc_html__('订单模块未初始化。', 'aksrt'));
                 },
             ],
+            'products' => [
+                'slug'     => 'aksrt_pay_products',
+                'title'    => __('付费文章', 'aksrt'),
+                'callback' => static function (): void {
+                    if (class_exists('AKSRT_Admin_Pay_Products')) {
+                        AKSRT_Admin_Pay_Products::get_instance()->render_products_page();
+                        return;
+                    }
+                    wp_die(esc_html__('付费文章模块未初始化。', 'aksrt'));
+                },
+            ],
             'shipping' => [
                 'slug'     => 'aksrt_shipping',
                 'title'    => __('发货及物流', 'aksrt'),