www：新增问题反馈功能；dashboard：适配问题反馈功能，可以在后台系统和用户沟通

www/app/composables/useRequest.ts

@@ -50,5 +50,10 @@ export function useRequest() {
     return request<T>(url, { method: 'POST', body });
   }
 
-  return { request, get, post };
+  /** POST multipart/form-data（文件上传；ofetch 自动设置 boundary） */
+  function postForm<T = unknown>(url: string, body: FormData) {
+    return request<T>(url, { method: 'POST', body });
+  }
+
+  return { request, get, post, postForm };
 }

www/app/composables/useSiteApi.ts

@@ -11,6 +11,8 @@ import type {
   AboutConfig,
   SupportConfig,
   ContactConfig,
+  SupportFeedbackItem,
+  SupportFeedbackMessage,
   PageSeo
 } from '~/types/site';
 
@@ -81,5 +83,33 @@ export function useSiteApi() {
     return useRequest().post<null>('/site/contact/submit', { form_data: formData });
   }
 
-  return { getGlobal, getNav, getSections, getI18n, getProducts, getNews, getNewsDetail, getPageConfig, getPageSeo, getContact, submitContact };
+  /** 提交问题反馈（multipart/form-data：product_id / description / email / log_file[可选]） */
+  function submitSupportFeedback(formData: FormData) {
+    return useRequest().postForm<{ feedback_no: string }>('/site/support/feedback', formData);
+  }
+
+  /** 按邮箱或反馈编号查询问题反馈 */
+  function getSupportFeedbacks(params: { email?: string; feedback_no?: string }) {
+    return get<{ items: SupportFeedbackItem[]; total: number }>('/site/support/feedbacks', params);
+  }
+
+  /** 拉取反馈对话消息（含当前反馈状态，便于轮询时同步状态） */
+  function getFeedbackMessages(feedbackNo: string, email: string, sinceId?: number) {
+    const params: Record<string, unknown> = { email };
+    if (sinceId && sinceId > 0) params.since_id = sinceId;
+    return get<{ items: SupportFeedbackMessage[]; total: number; status: string }>(
+      `/site/support/feedbacks/${encodeURIComponent(feedbackNo)}/messages`,
+      params,
+    );
+  }
+
+  /** 用户发送反馈对话消息 */
+  function sendFeedbackMessage(feedbackNo: string, email: string, content: string) {
+    return useRequest().post<{ items: SupportFeedbackMessage[]; total: number }>(
+      `/site/support/feedbacks/${encodeURIComponent(feedbackNo)}/messages`,
+      { email, content },
+    );
+  }
+
+  return { getGlobal, getNav, getSections, getI18n, getProducts, getNews, getNewsDetail, getPageConfig, getPageSeo, getContact, submitContact, submitSupportFeedback, getSupportFeedbacks, getFeedbackMessages, sendFeedbackMessage };
 }