feat: 完善商品筛选、发布配置与优质号主流程

backend/internal/modules/payment/quality_owner_payment.go

@@ -52,7 +52,7 @@ func (r *Repository) prepareQualityOwnerPayment(ctx context.Context, userID uint
 			Order("id DESC").
 			First(&existing).Error
 		if err == nil {
-			if canReuseOrderPayment(existing, *runtimeConfig) {
+			if canReuseQualityOwnerPayment(existing, *runtimeConfig) {
 				existing.PayWay = firstNonEmpty(req.PayWay, existing.PayWay, runtimeConfig.PayWay, "ZFBZF")
 				existing.JSPayFlag = firstNonEmpty(req.JSPayFlag, existing.JSPayFlag, runtimeConfig.JSPayFlag, "2")
 				existing.AmountCent = amountCent
@@ -87,6 +87,15 @@ func (r *Repository) prepareQualityOwnerPayment(ctx context.Context, userID uint
 	return r.findPaymentByID(ctx, paymentID)
 }
 
+// canReuseQualityOwnerPayment 仅复用尚未完成的有效支付单。
+// 已支付单属于上一轮开通周期，取消后必须重新创建支付单，避免“旧单已支付”被误当成新一轮开通。
+func canReuseQualityOwnerPayment(payment model.PaymentOrder, runtimeConfig runtimePaymentConfig) bool {
+	if payment.Status == "paid" {
+		return false
+	}
+	return canReuseOrderPayment(payment, runtimeConfig)
+}
+
 func newQualityOwnerPayment(userID uint64, amountCent int64, req StartPaymentRequest, runtimeConfig runtimePaymentConfig) (model.PaymentOrder, error) {
 	paymentNo, err := newPaymentNo()
 	if err != nil {