diff --git a/api_service.py b/api_service.py
index 6694efe..1ea1b83 100644
--- a/api_service.py
+++ b/api_service.py
@@ -4,17 +4,18 @@ This can run independently to support the PHP application.
 """
 
 from __future__ import annotations
+
 import asyncio
-from contextlib import asynccontextmanager
 import json
 import logging
 import os
 import re
 import time
-from typing import Any, TYPE_CHECKING
+from contextlib import asynccontextmanager
+from typing import TYPE_CHECKING, Any
 
 if TYPE_CHECKING:
-    from collections.abc import AsyncIterator, Callable, Awaitable
+    from collections.abc import AsyncIterator, Awaitable, Callable
 
 # Avoid importing heavy modules at top-level to keep `import api_service` lightweight
 from fastapi import FastAPI, Query, Request, Response