feat: 完善物流信息展示功能

- 修复物流信息中 order_id 字段缺失的问题，确保按钮正常生成
- 添加 tracking_url 支持，新增"官网追踪"按钮
- "官网追踪"按钮在新标签页打开 (target: "_blank")
- 改进日志记录，添加完整的 payload 预览

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

agent/agents/order.py

@@ -815,8 +815,10 @@ def _parse_logistics_data(data: dict[str, Any]) -> dict[str, Any]:
     )
 
     return {
+        "order_id": mcp_result.get("order_id", ""),  # 添加订单号
         "carrier": mcp_result.get("courier", mcp_result.get("carrier", mcp_result.get("express_name", "未知"))),
         "tracking_number": mcp_result.get("tracking_number") or "",
+        "tracking_url": mcp_result.get("tracking_url", mcp_result.get("trackingUrl", "")),  # 添加追踪链接
         "status": mcp_result.get("status"),
         "estimated_delivery": mcp_result.get("estimatedDelivery"),
         "timeline": mcp_result.get("timeline", [])