feat: 增强 Agent 系统和完善项目结构

主要改进:
- Agent 增强: 订单查询、售后支持、客服路由等功能优化
- 新增语言检测和 Token 管理模块
- 改进 Chatwoot webhook 处理和用户标识
- MCP 服务器增强: 订单 MCP 和 Strapi MCP 功能扩展
- 新增商城客户端、知识库、缓存和同步模块
- 添加多语言提示词系统 (YAML)
- 完善项目结构: 整理文档、脚本和测试文件
- 新增调试和测试工具脚本

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

agent/integrations/chatwoot.py

@@ -56,10 +56,10 @@ class ChatwootClient:
         self,
         api_url: Optional[str] = None,
         api_token: Optional[str] = None,
-        account_id: int = 1
+        account_id: int = 2
     ):
         """Initialize Chatwoot client
-        
+
         Args:
             api_url: Chatwoot API URL, defaults to settings
             api_token: API access token, defaults to settings
@@ -69,7 +69,7 @@ class ChatwootClient:
         self.api_token = api_token or settings.chatwoot_api_token
         self.account_id = account_id
         self._client: Optional[httpx.AsyncClient] = None
-        
+
         logger.info("Chatwoot client initialized", api_url=self.api_url)
     
     async def _get_client(self) -> httpx.AsyncClient: