feat: 待付款续付 jixuzhifu，复用原单号且不误改支付状态

仅 Status=9 可续付；续付前渠道查单，已付走现有 fucha 履约；本接口不把未付标成已付。

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

orders/views/__init__.py

@@ -8,6 +8,7 @@ from .payment import (
     AlipayPayNotifyView,
     PaymentVerifyView,
     CreateOrderView,
+    ContinuePayView,
     alipay_pay_page,
 )
 from .boss_orders import (
@@ -68,7 +69,8 @@ from .merchant_penalty import (
 )
 
 __all__ = [
-    "PaymentFailView", "WechatPayNotifyView", "AlipayPayNotifyView", "PaymentVerifyView", "CreateOrderView",
+    "PaymentFailView", "WechatPayNotifyView", "AlipayPayNotifyView", "PaymentVerifyView", "CreateOrderView",
+    "ContinuePayView",
     "alipay_pay_page",
     "DingdanHuoquView", "DingdanXiangqingView", "JiedanView",
     "DingdanXiangqingView2", "JiedanView2",