费用管理内容优化-初步

backend/app/schemas/fee_common.py

@@ -0,0 +1,11 @@
+from typing import Generic, TypeVar
+
+from pydantic.generics import GenericModel
+
+T = TypeVar("T")
+
+
+class FeeApiResponse(GenericModel, Generic[T]):
+    data: T | None = None
+    error: str | dict | None = None
+    meta: dict | None = None