feat:前端修改(最后一次)

frontend/lib/api.ts

@@ -29,6 +29,22 @@ function handleUnauthorized(status: number) {
   if (!window.location.pathname.startsWith("/login")) window.location.href = "/login";
 }
 
+/**
+ * 从错误响应体里取后端给的原因（如「会话不存在或已过期」）。
+ * 非 2xx 时后端返回的是 JSON（utils/response.fail），部分场景也会包成 SSE。
+ */
+function extractErrorMessage(body: string): string | undefined {
+  const text = body.trim();
+  if (!text) return undefined;
+  const jsonText = text.startsWith("data:") ? text.split("\n")[0].slice(5).trim() : text;
+  try {
+    const payload = JSON.parse(jsonText) as { message?: string; error?: string };
+    return payload?.message ?? payload?.error;
+  } catch {
+    return undefined;
+  }
+}
+
 /**
  * 后端存在两套成功码，必须都认：
  * - utils/response.success → code 200（工作台、风控、工单等）
@@ -126,6 +142,8 @@ export interface SSESummary {
   traceId?: string;
   /** error 事件里的提示文案。 */
   error?: string;
+  /** 客服 Agent 命中的知识来源（裸 JSON 响应里的 sources）。 */
+  sources?: unknown[];
 }
 
 /**
@@ -152,7 +170,13 @@ export async function readSSE(
   });
 
   handleUnauthorized(response.status);
-  if (!response.ok) throw new ApiError("请求失败，请稍后重试", response.status);
+  if (!response.ok) {
+    const body = await response.text();
+    throw new ApiError(
+      extractErrorMessage(body) ?? "请求失败，请稍后重试",
+      response.status
+    );
+  }
 
   const summary: SSESummary = { text: "" };
   const raw = await response.text();
@@ -170,29 +194,45 @@ export async function readSSE(
       continue; /* 忽略心跳与非 JSON 块 */
     }
 
-    if (event.type === "text") {
-      summary.text += event.content ?? "";
-    } else if (event.type === "meta") {
-      summary.intent = event.intent;
-      summary.draftId = event.draft_id;
-      summary.queryId = event.query_id;
-      summary.traceId = event.trace_id;
-    } else if (event.type === "done") {
-      if (event.draft_id) summary.draftId = event.draft_id;
-      if (event.query_id) summary.queryId = event.query_id;
-    } else if (event.type === "error") {
-      summary.error = event.message ?? "助手返回错误，请稍后重试";
+    const record = event as Record<string, unknown>;
+    const type = typeof record.type === "string" ? record.type : undefined;
+
+    if (type === "text") {
+      summary.text += (record.content as string) ?? "";
+    } else if (type === "meta") {
+      summary.intent = record.intent as string | undefined;
+      summary.draftId = record.draft_id as string | undefined;
+      summary.queryId = record.query_id as string | undefined;
+      summary.traceId = record.trace_id as string | undefined;
+    } else if (type === "done") {
+      if (record.draft_id) summary.draftId = record.draft_id as string;
+      if (record.query_id) summary.queryId = record.query_id as string;
+    } else if (type === "error") {
+      summary.error = (record.message as string) ?? "助手返回错误，请稍后重试";
+    } else if (!type) {
+      /*
+       * 无 type 的响应——客服 Agent / 客户 Agent 不用事件包装，直接 dump 业务对象：
+       * service/customer_agent/chat.py → {answer, sources, intent, rewritten_query, trace_id}
+       * 另兼容 success() 包装的 {code, message, data}（取值时自动下钻一层 data）。
+       * 旧实现只认 type=text，导致这两个 Agent 的回复恒为空串（聊天框永远回「暂时没有找到合适的回答」）。
+       */
+      const node =
+        record.data && typeof record.data === "object"
+          ? (record.data as Record<string, unknown>)
+          : record;
+      const answer = node.answer ?? node.content ?? node.summary;
+      if (typeof answer === "string" && answer) {
+        summary.text += answer;
+      } else if (typeof record.message === "string" && record.message) {
+        summary.error = record.message;
+      }
+      if (typeof node.intent === "string") summary.intent = node.intent;
+      if (typeof node.query_id === "string") summary.queryId = node.query_id;
+      const trace = node.trace_id ?? record.trace_id;
+      if (typeof trace === "string") summary.traceId = trace;
+      if (Array.isArray(node.sources)) summary.sources = node.sources;
     }
   }
 
   return summary;
 }
-
-/**
- * 取 SSE 响应的正文文本（客服/客户 Agent 聊天用）。
- * 旧实现只取第一个 data 行，命中 meta 事件时会拿到空串，这里改为聚合全部 text 事件。
- */
-export async function apiStream(path: string, body: unknown): Promise<string> {
-  const summary = await readSSE(path, body);
-  return summary.error || summary.text;
-}