feat: 全新智能体功能

- 基于先进智能体框架，增加智能体编排功能
- 增加智能体聊天，并对接持久化

easyflow-ui-usercenter/packages/utils/src/helpers/__tests__/chat-time.test.ts

@@ -1,9 +1,6 @@
-import { describe, expect, it } from 'vitest';
+import {describe, expect, it} from 'vitest';
 
-import {
-  ChatTimeHistoryMapper,
-  ChatTimeTimelineBuilder,
-} from '../chat-time';
+import {ChatTimeHistoryMapper, ChatTimeTimelineBuilder,} from '../chat-time';
 
 describe('chat-time timeline builder', () => {
   it('builds assistant thinking and message in the same assistant item', () => {
@@ -29,6 +26,37 @@ describe('chat-time timeline builder', () => {
     ]);
   });
 
+  it('appends markdown deltas without altering repeated symbols', () => {
+    const items: any[] = [];
+
+    ChatTimeTimelineBuilder.appendThinkingDelta(items, '先想一下', 1);
+    ChatTimeTimelineBuilder.appendMessageDelta(items, '## 标题\n', 2);
+    ChatTimeTimelineBuilder.appendMessageDelta(items, '| 模型 | 说明 |\n', 3);
+    ChatTimeTimelineBuilder.appendMessageDelta(items, '| --- | --- |\n', 4);
+    ChatTimeTimelineBuilder.appendMessageDelta(items, '| ACL | 访问控制列表 |\n', 5);
+    ChatTimeTimelineBuilder.appendMessageDelta(
+      items,
+      'Final Answer: ```echartsoption',
+      6,
+    );
+
+    expect(items).toHaveLength(1);
+    expect(items[0]).toMatchObject({
+      content:
+        '## 标题\n| 模型 | 说明 |\n| --- | --- |\n| ACL | 访问控制列表 |\nFinal Answer: ```echartsoption',
+      role: 'assistant',
+      typing: true,
+    });
+    expect(items[0].segments).toMatchObject([
+      { content: '先想一下', status: 'end', type: 'thinking' },
+      {
+        content:
+          '## 标题\n| 模型 | 说明 |\n| --- | --- |\n| ACL | 访问控制列表 |\nFinal Answer: ```echartsoption',
+        type: 'text',
+      },
+    ]);
+  });
+
   it('creates a new assistant item after tool result', () => {
     const items: any[] = [];