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/payment.py

@@ -1035,6 +1035,8 @@ class CreateOrderView(APIView):
         调用微信支付统一下单接口，生成支付参数
         """
         try:
+            from jituan.constants import FUBEI_BIZ_ORDER
+            from jituan.services.mini_pay_router import maybe_create_fubei_jsapi_params
             from jituan.services.wechat_pay import get_wechat_v2_config
             pay_cfg = get_wechat_v2_config(club_id)
             APPID = pay_cfg['appid']
@@ -1042,6 +1044,18 @@ class CreateOrderView(APIView):
             KEY = pay_cfg['key']
             NOTIFY_URL = getattr(settings, 'WEIXIN_NOTIFY_URL', '')
 
+            fb_params = maybe_create_fubei_jsapi_params(
+                club_id=club_id,
+                out_trade_no=dingdanid,
+                amount_yuan=jine,
+                body=beizhu,
+                openid=openid,
+                notify_url=NOTIFY_URL,
+                biz_type=FUBEI_BIZ_ORDER,
+            )
+            if fb_params is not None:
+                return fb_params
+
             # NOAUTH 诊断日志：打印生效的 club_id / appid / mchid / openid 指纹
             _oid_preview = (openid or '')[:6] + '...' + (openid or '')[-4:] if (openid or '') else '(empty)'
             logger.warning(