fix(web): 恢复 PromotionManagement 路由缺失的 path/name（构建阻断回归）

cfc-web/src/router/index.js

@@ -733,6 +733,9 @@ const routes = [
         component: () => import('@/views/admin/RecommendationRules.vue'),
         meta: { title: '商品推荐规则管理', perm: 'config:recommendation' }
       },
+      {
+        path: 'promotion',
+        name: 'PromotionManagement',
         component: () => import('@/views/admin/PromotionManagement'),
         meta: { title: '推广管理', perm: 'marketing:promotion' }
       },