fix: createOrder 透传 couponId(会员优惠券此前未生效)

cfc-frontend/utils/api.js

@@ -366,11 +366,14 @@ export const getCurrentLevel = () => {
 	return request('/api/membership/current', 'POST')
 }
 
-export const createOrder = (levelCode, paymentType, period) => {
+export const createOrder = (levelCode, paymentType, period, couponId) => {
 	var data = { levelCode: levelCode, paymentType: paymentType }
 	if (period) {
 		data.period = period
 	}
+	if (couponId) {
+		data.couponId = couponId
+	}
 	return request('/api/membership/orders', 'POST', data)
 }