from typing import Union
from fastapi.responses import JSONResponse
from fastapi.encoders import jsonable_encoder

def create_api_response(code: str, message: str, data: Union[dict, list, None] = None) -> JSONResponse:
    """Creates a standardized API JSON response."""
    return JSONResponse(
        status_code=200,
        content={
            "code": str(code),
            "message": message,
            "data": jsonable_encoder(data) if data is not None else {},
        },
    )