feat(users): add inline promotion center

inc/helpers/user-center-renderers/sidebar-nav.php

@@ -11,6 +11,7 @@ $level_url = isset($dashboard_tabs['level'])
 	? aksrt_get_user_center_tab_url('level')
 	: '';
 $auth_url = isset($dashboard_tabs['auth']) ? aksrt_get_user_center_tab_url('auth') : '';
+$promotion_url = isset($dashboard_tabs['promotion']) ? aksrt_get_user_center_tab_url('promotion') : '';
 $orders_available = isset($dashboard_tabs['orders']);
 $orders_url = $orders_available ? (string) ($orders_url ?? '') : '';
 
@@ -28,6 +29,13 @@ $services = array_values(array_filter([
 		'url'   => $auth_url,
 		'tab'   => 'auth',
 	],
+	[
+		'label' => __('推广中心', 'aksrt'),
+		'icon'  => 'user-plus',
+		'tone'  => 'promotion',
+		'url'   => $promotion_url,
+		'tab'   => 'promotion',
+	],
 	[
 		'label' => __('我的订单', 'aksrt'),
 		'icon'  => 'receipt',