feat(orders): embed My Orders inside user center (zibll-style)

Register UC panel tab=orders with full order list/actions UI; route
aksrt_get_orders_page_url and /orders template to profile?tab=orders;
enqueue order assets when the UC orders tab is active.

src/AKSRT/Core/ScriptsPart1b.php

@@ -666,8 +666,15 @@ $hmb_js = get_template_directory() . '/assets/js/header-newadd.js';
             }
         }
 
-        // 订单中心页
-        if (is_page_template('templates/pages/page-orders.php') || (bool) get_query_var('aksrt_orders')) {
+        // 订单中心：独立页 / 虚拟 rewrite / 用户中心 tab=orders
+        $is_orders_surface = is_page_template('templates/pages/page-orders.php')
+            || (bool) get_query_var('aksrt_orders')
+            || (
+                (function_exists('aksrt_is_user_center_page') && aksrt_is_user_center_page())
+                && isset($_GET['tab'])
+                && sanitize_key((string) wp_unslash($_GET['tab'])) === 'orders'
+            );
+        if ($is_orders_surface) {
             wp_enqueue_style(
                 'aksrt-orders',
                 $base_uri . '/assets/css/routes/orders.css',