refactor: unify agent data port access

app/agent/tools/impl/test_site.py

@@ -7,7 +7,7 @@ from pydantic import BaseModel, Field
 from app.agent.tools.base import MoviePilotTool
 from app.agent.tools.tags import ToolTag
 from app.chain.site import SiteChain
-from app.application.agentdata import SitePort as SiteOper
+from app.application.agentdata import get_agent_site_port
 from app.runtime.log import logger
 
 
@@ -33,7 +33,7 @@ class TestSiteTool(MoviePilotTool):
     @staticmethod
     def _test_site_sync(site_identifier: int) -> tuple[Optional[str], Optional[str], bool, str]:
         """在同步线程里执行站点联通测试，避免网络请求卡住事件循环。"""
-        site = SiteOper().get(site_identifier)
+        site = get_agent_site_port().get(site_identifier)
         if not site:
             return None, None, False, f"未找到站点：{site_identifier}，请使用 query_sites 工具查询可用的站点"