fix: auto-fix code issues (cron)

- 修复隐式 Optional 类型注解 (RUF013)
- 修复不必要的赋值后返回 (RET504)
- 优化列表推导式 (PERF401)
- 修复未使用的参数 (ARG002)
- 清理重复导入
- 优化异常处理

backend/api_key_manager.py

@@ -132,7 +132,7 @@ class ApiKeyManager:
         self,
         name: str,
         owner_id: str | None = None,
-        permissions: list[str] = None,
+        permissions: list[str] | None = None,
         rate_limit: int = 60,
         expires_days: int | None = None,
     ) -> tuple[str, ApiKey]:
@@ -238,7 +238,8 @@ class ApiKeyManager:
             # 验证所有权（如果提供了 owner_id）
             if owner_id:
                 row = conn.execute(
-                    "SELECT owner_id FROM api_keys WHERE id = ?", (key_id,),
+                    "SELECT owner_id FROM api_keys WHERE id = ?",
+                    (key_id,),
                 ).fetchone()
                 if not row or row[0] != owner_id:
                     return False
@@ -267,7 +268,8 @@ class ApiKeyManager:
 
             if owner_id:
                 row = conn.execute(
-                    "SELECT * FROM api_keys WHERE id = ? AND owner_id = ?", (key_id, owner_id),
+                    "SELECT * FROM api_keys WHERE id = ? AND owner_id = ?",
+                    (key_id, owner_id),
                 ).fetchone()
             else:
                 row = conn.execute("SELECT * FROM api_keys WHERE id = ?", (key_id,)).fetchone()
@@ -337,7 +339,8 @@ class ApiKeyManager:
             # 验证所有权
             if owner_id:
                 row = conn.execute(
-                    "SELECT owner_id FROM api_keys WHERE id = ?", (key_id,),
+                    "SELECT owner_id FROM api_keys WHERE id = ?",
+                    (key_id,),
                 ).fetchone()
                 if not row or row[0] != owner_id:
                     return False
@@ -465,7 +468,8 @@ class ApiKeyManager:
             endpoint_params = []
             if api_key_id:
                 endpoint_query = endpoint_query.replace(
-                    "WHERE created_at", "WHERE api_key_id = ? AND created_at",
+                    "WHERE created_at",
+                    "WHERE api_key_id = ? AND created_at",
                 )
                 endpoint_params.insert(0, api_key_id)
 
@@ -486,7 +490,8 @@ class ApiKeyManager:
             daily_params = []
             if api_key_id:
                 daily_query = daily_query.replace(
-                    "WHERE created_at", "WHERE api_key_id = ? AND created_at",
+                    "WHERE created_at",
+                    "WHERE api_key_id = ? AND created_at",
                 )
                 daily_params.insert(0, api_key_id)