feat: 分俱乐部付呗收款通道，默认仍走微信直连

小程序前端仍传 wechat；后台可切换 wechat/fubei，支持配置多套付呗并退款按原通道路由。

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

orders/views/admin.py

@@ -1305,6 +1305,18 @@ class AdTongYiTuiKuanPingTai(APIView):
         :return: {'success': True/False, 'msg': '消息', 'refund_id': '退款单号'}
         """
         try:
+            from jituan.services.pay_refund_router import try_fubei_refund
+            from jituan.services.wechat_pay import club_id_from_order
+            fb = try_fubei_refund(
+                out_trade_no=out_trade_no,
+                amount_yuan=jine,
+                club_id=club_id_from_order(out_trade_no),
+            )
+            if fb is not None:
+                if fb.get('code') == 0:
+                    return {'success': True, 'msg': fb.get('msg') or 'success', 'refund_id': fb.get('refund_id')}
+                return {'success': False, 'msg': fb.get('msg') or '付呗退款失败'}
+
             # 检查配置
             required_settings = ['WEIXIN_APPID', 'WEIXIN_MCHID', 'WEIXIN_SHANGHUMIYAO', 'WEIXIN_CERT_PATH', 'WEIXIN_KEY_PATH']
             for setting in required_settings: