fix: 平台微信退款改用俱乐部收款配置（付呗/直连分路，不动支付宝）

Co-authored-by: Cursor <cursoragent@cursor.com>

users/views/kefu_orders.py

@@ -918,84 +918,29 @@ class KefuPlatformRefundView(APIView):
 
     def call_wechat_refund(self, dingdan_id, jine, transaction_id=None):
         """
-        调用微信支付退款接口
-        :param dingdan_id: 商户订单号（我们的订单ID）
-        :param jine: 退款金额
-        :param transaction_id: 微信支付订单号（优先使用）
-        :return: {'code': 0, 'msg': '成功', 'refund_id': 'xxx'} 或 {'code': 非0, 'msg': '错误信息'}
+        平台订单退款：付呗单走付呗；微信直连单按订单 Club 的「收款」配置 V2 退款（不用全局 settings、不用提现 V3）。
+        不处理支付宝。
         """
         from jituan.services.pay_refund_router import try_fubei_refund
         from jituan.services.wechat_pay import club_id_from_order
+        from jituan.services.wechat_v2_refund import refund_wechat_v2_by_club
+
+        club_id = club_id_from_order(dingdan_id)
         fb = try_fubei_refund(
             out_trade_no=dingdan_id,
             amount_yuan=jine,
-            club_id=club_id_from_order(dingdan_id),
+            club_id=club_id,
         )
         if fb is not None:
             return fb
 
-        # 获取配置
-        appid = getattr(settings, 'WEIXIN_APPID', '')
-        mch_id = getattr(settings, 'WEIXIN_MCHID', '')
-        key = getattr(settings, 'WEIXIN_SHANGHUMIYAO', '')
-        cert_path = getattr(settings, 'WEIXIN_CERT_PATH', '')
-        key_path = getattr(settings, 'WEIXIN_KEY_PATH', '')
-
-        if not all([appid, mch_id, key, cert_path, key_path]):
-            missing = [k for k, v in {'appid': appid, 'mch_id': mch_id, 'key': key, 'cert_path': cert_path, 'key_path': key_path}.items() if not v]
-            logger.error(f"微信支付配置缺失: {missing}")
-            return {'code': 500, 'msg': f'系统支付配置缺失: {missing}'}
-
-        # 生成退款单号
-        out_refund_no = self.generate_refund_no(dingdan_id)
-        total_fee = yuan_to_fen(jine)
-        refund_fee = total_fee
-        refund_desc = '客服退款'
-
-        # 构造请求参数
-        params = {
-            'appid': appid,
-            'mch_id': mch_id,
-            'nonce_str': self.generate_nonce_str(),
-            'out_refund_no': out_refund_no,
-            'total_fee': total_fee,
-            'refund_fee': refund_fee,
-            'refund_desc': refund_desc,
-        }
-        if transaction_id:
-            params['transaction_id'] = transaction_id
-        else:
-            params['out_trade_no'] = dingdan_id  # 使用订单ID作为商户订单号
-
-        # 生成签名
-        sorted_keys = sorted(params.keys())
-        stringA = '&'.join([f"{k}={params[k]}" for k in sorted_keys])
-        stringSignTemp = f"{stringA}&key={key}"
-        sign = hashlib.md5(stringSignTemp.encode('utf-8')).hexdigest().upper()
-        params['sign'] = sign
-
-        xml_data = self.dict_to_xml(params)
-        url = 'https://api.mch.weixin.qq.com/secapi/pay/refund'
-
-        try:
-            response = requests.post(
-                url,
-                data=xml_data,
-                cert=(cert_path, key_path),
-                timeout=10
-            )
-            result = xmltodict.parse(response.content)['xml']
-            logger.info(f"微信退款响应: {result}")
-        except Exception as e:
-            logger.error(f"微信退款请求异常: {str(e)}", exc_info=True)
-            return {'code': 500, 'msg': '微信退款请求异常'}
-
-        if result.get('return_code') == 'SUCCESS' and result.get('result_code') == 'SUCCESS':
-            return {'code': 0, 'msg': 'success', 'refund_id': out_refund_no}
-        else:
-            err_msg = result.get('err_code_des', result.get('return_msg', '未知错误'))
-            logger.warning(f"微信退款失败: {err_msg}")
-            return {'code': 400, 'msg': err_msg}
+        return refund_wechat_v2_by_club(
+            out_trade_no=dingdan_id,
+            amount_yuan=jine,
+            club_id=club_id,
+            transaction_id=transaction_id,
+            reason='客服退款',
+        )
 
     def generate_nonce_str(self):
         return ''.join(random.choices(string.ascii_letters + string.digits, k=32))