feat: 添加物流查询功能和完善 token 传递

- 添加 get_logistics 工具查询 Mall API /mall/api/order/parcel
- 修复 Cookie token 传递到 MCP 的问题
- 增强 LLM 客户端超时处理和日志
- 移除 MALL_API_TOKEN，使用用户登录 token
- 更新测试页面使用 setUser 设置用户属性
- 增强 webhook 调试日志

agent/agents/router.py

@@ -81,12 +81,27 @@ async def classify_intent(state: AgentState) -> AgentState:
         
         # Parse JSON response
         content = response.content.strip()
+        
+        # Log raw response for debugging
+        logger.debug(
+            "LLM response for intent classification",
+            response_preview=content[:500] if content else "EMPTY",
+            content_length=len(content) if content else 0
+        )
+        
         # Handle markdown code blocks
         if content.startswith("```"):
             content = content.split("```")[1]
             if content.startswith("json"):
                 content = content[4:]
         
+        # Check for empty response
+        if not content:
+            logger.warning("LLM returned empty response for intent classification")
+            state["intent"] = Intent.CUSTOMER_SERVICE.value  # Default to customer service
+            state["intent_confidence"] = 0.5
+            return state
+        
         result = json.loads(content)
         
         # Extract intent