[moz] fix(api): flake8 lint 修复 — 移除未使用 import

src/api/shared.py

@@ -1,6 +1,5 @@
 """共享 helper 和常量"""
 
-from pathlib import Path
 from typing import Any, Dict
 from fastapi import HTTPException
 
@@ -56,7 +55,8 @@ def _init_agent_ids():
     if _KNOWN_AGENT_IDS:
         return
     try:
-        import yaml, os
+        import yaml
+        import os
         cfg_path = os.path.join(os.path.dirname(__file__), "..", "..", "config", "default.yaml")
         with open(cfg_path) as f:
             cfg = yaml.safe_load(f)