fix: 支持模型异常后继续文档对话

- 将本轮文档上下文纳入可持久化的 Agent 用户消息

=- 在异常提示中提供请重试动作并自动发送继续

easyflow-ui-admin/app/src/views/ai/shared/agent-agui/projection.ts

@@ -18,6 +18,7 @@ import { easyFlowAguiCustomEvent } from './custom-events';
 export interface AguiTimelineProjectionOptions {
   finishedAt?: number;
   onInputAccepted?: (payload: Record<string, unknown>) => Promise<void> | void;
+  runErrorMessage?: string;
   roundId?: string;
   startedAt?: number;
 }
@@ -361,7 +362,7 @@ export function applyAguiEventToTimeline(
       }
       ChatTimelineBuilder.appendError(
         items,
-        event.message || '请求失败',
+        options.runErrorMessage || event.message || '请求失败',
         metadata(options, state),
       );
       ChatTimelineBuilder.finalize(items, {