fix: make detail field optional in APIResponse model

Author: vastsa

core/response.py

@@ -2,7 +2,7 @@
 # @Author  : Lan
 # @File    : response.py
 # @Software: PyCharm
-from typing import Generic, TypeVar
+from typing import Generic, Optional, TypeVar
 
 from pydantic import BaseModel
 
@@ -12,4 +12,4 @@
 class APIResponse(BaseModel, Generic[T]):
     code: int = 200
     message: str = "ok"
-    detail: T
+    detail: Optional[T] = None