接口报错异常处理

frontend-web/src/open-canvas/components/ai-writing/TimelineStep.tsx

@@ -77,6 +77,17 @@ export function TimelineStep({ event, isLast, children }: TimelineStepProps) {
                 {event.detail}
               </p>
             )}
+            {/* 接口解析失败时的原始错误响应体，默认折叠，点击展开 */}
+            {event.raw && (
+              <details className="mt-1">
+                <summary className="cursor-pointer select-none text-[11px] font-medium text-muted-foreground hover:text-foreground">
+                  错误返回结果（点击展开）
+                </summary>
+                <pre className="mt-1 max-h-60 overflow-auto whitespace-pre-wrap break-all rounded bg-muted/60 p-2 text-[10px] leading-relaxed text-muted-foreground">
+                  {event.raw}
+                </pre>
+              </details>
+            )}
           </div>
         ) : (
           <span className="ml-1.5 text-xs text-muted-foreground">{event.message}</span>

frontend-web/src/open-canvas/types/ai-writing.ts

@@ -90,6 +90,8 @@ export interface ProgressEvent {
   // notice（非致命告警）/ error：标题 + 真实原因
   title?: string;
   detail?: string;
+  // 接口解析失败时的原始错误响应体，前端默认折叠展示
+  raw?: string;
   // materials_ready
   materials?: AIMaterial[];
   keywords?: string[];