feat(customer-service): 新增客户服务问题反馈管理功能

- 重命名语言文件中相关关键字，统一改为 customer-service_feedbacks
- 新增客户服务反馈页面路由及组件导入，移除旧的 www_support_feedbacks 相关路由
- 实现客户服务反馈列表及详情查看，支持状态筛选、分页查询和消息对话展示
- 支持反馈状态变更，包括待处理、处理中和已解决状态切换
- 支持在对话中发送回复消息，且针对已解决状态自动停止轮询
- 优化状态标签样式，采用更易区分的颜色与视觉样式
- 组件及类型定义中新增 NCollapse 和 NCollapseItem 支持
- 移除旧的 www 支持反馈组件代码，清理无用路由及类型定义相关项

dashboard/frontend/src/typings/elegant-router.d.ts

@@ -20,6 +20,8 @@ declare module "@elegant-router/types" {
     "403": "/403";
     "404": "/404";
     "500": "/500";
+    "customer-service": "/customer-service";
+    "customer-service_feedbacks": "/customer-service/feedbacks";
     "headphone": "/headphone";
     "headphone_brand": "/headphone/brand";
     "headphone_impedance": "/headphone/impedance";
@@ -65,8 +67,6 @@ declare module "@elegant-router/types" {
     "www_product_detail": "/www/product/detail";
     "www_product_list": "/www/product/list";
     "www_product_series": "/www/product/series";
-    "customer-service": "/www/support";
-    "www_support_feedbacks": "/www/support/feedbacks";
   };
 
   /**
@@ -101,6 +101,7 @@ declare module "@elegant-router/types" {
     | "403"
     | "404"
     | "500"
+    | "customer-service"
     | "headphone"
     | "home"
     | "iframe-page"
@@ -111,7 +112,6 @@ declare module "@elegant-router/types" {
     | "toolbox"
     | "upgrade"
     | "www"
-    | "customer-service"
   >;
 
   /**
@@ -133,6 +133,7 @@ declare module "@elegant-router/types" {
     | "500"
     | "iframe-page"
     | "login"
+    | "customer-service_feedbacks"
     | "headphone_brand"
     | "headphone_impedance"
     | "headphone_model"
@@ -164,7 +165,6 @@ declare module "@elegant-router/types" {
     | "www_product_detail"
     | "www_product_list"
     | "www_product_series"
-    | "www_support_feedbacks"
   >;
 
   /**