feat: 先进智能体功能上线

- 基于 agent-runtime 打造，默认 ReAct agent
- 支持 agent 能力对接，已对接工作流、插件、知识库等 tool 能力
- 全新 agent 编排界面，支持可视化便捷配置 agent
- 全新 agent 聊天界面，支持快捷操作、额外知识库选择等

easyflow-ui-admin/app/src/views/ai/agent-chat/agentChatRuntimeManager.ts

@@ -1,7 +1,9 @@
 import type {ChatTimelineItem} from '@easyflow/common-ui';
 import {ChatTimelineBuilder} from '@easyflow/common-ui';
 
+import type {AgentChatCapabilityPayload} from './api';
 import {generateAgentSessionId, sendAgentChat, stopAgentChatStream,} from './api';
+
 import {applyAgentSseEnvelope, parseAgentSseMessage,} from './adapters/agentTimelineAdapter';
 
 interface RuntimeSessionState {
@@ -34,6 +36,7 @@ interface StartOptions {
   agentId: string;
   agentName?: string;
   baseItems?: ChatTimelineItem[];
+  capabilities?: AgentChatCapabilityPayload[];
   prompt: string;
   sessionId?: string;
 }
@@ -47,7 +50,8 @@ const listeners = new Set<() => void>();
 let latestSessionId = '';
 
 function clone<T>(value: T): T {
-  return JSON.parse(JSON.stringify(value)) as T;
+  const serialized = JSON.stringify(value);
+  return JSON.parse(serialized) as T;
 }
 
 function createRoundId() {
@@ -225,6 +229,7 @@ export const agentChatRuntimeManager = {
     void sendAgentChat(
       {
         agentId: options.agentId,
+        capabilities: options.capabilities,
         prompt: options.prompt,
         sessionId,
       },