各种配置项修复，优化到后台管理端配置

internal/logic/public/order/preCreateOrderLogic.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"math"
 
+	commonLogic "github.com/perfect-panel/server/internal/logic/common"
 	"github.com/perfect-panel/server/internal/model/order"
 	"github.com/perfect-panel/server/pkg/tool"
 
@@ -52,25 +53,30 @@ func (l *PreCreateOrderLogic) PreCreateOrder(req *types.PurchaseOrderRequest) (r
 
 	targetSubscribeID := req.SubscribeId
 	isSingleModeRenewal := false
-	if l.svcCtx.Config.Subscribe.SingleModel {
-		anchorSub, anchorErr := l.svcCtx.UserModel.FindSingleModeAnchorSubscribe(l.ctx, u.Id)
-		switch {
-		case anchorErr == nil && anchorSub != nil:
-			targetSubscribeID = anchorSub.SubscribeId
-			isSingleModeRenewal = true
-			if req.SubscribeId != targetSubscribeID {
-				return nil, errors.Wrapf(xerr.NewErrCode(xerr.SingleSubscribePlanMismatch), "single subscribe mode plan mismatch")
-			}
+	decision, routeErr := commonLogic.ResolvePurchaseRoute(
+		l.ctx,
+		l.svcCtx.Config.Subscribe.SingleModel,
+		u.Id,
+		req.SubscribeId,
+		l.svcCtx.UserModel.FindSingleModeAnchorSubscribe,
+	)
+	switch {
+	case errors.Is(routeErr, commonLogic.ErrSingleModePlanMismatch):
+		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SingleSubscribePlanMismatch), "single subscribe mode plan mismatch")
+	case errors.Is(routeErr, gorm.ErrRecordNotFound):
+	case routeErr != nil:
+		l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", routeErr.Error()), logger.Field("user_id", u.Id))
+		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find single mode anchor subscribe error: %v", routeErr.Error())
+	case decision != nil:
+		targetSubscribeID = decision.ResolvedSubscribeID
+		isSingleModeRenewal = decision.Route == commonLogic.PurchaseRoutePurchaseToRenewal
+		if isSingleModeRenewal && decision.Anchor != nil {
 			l.Infow("[PreCreateOrder] single mode purchase routed to renewal preview",
 				logger.Field("mode", "single"),
 				logger.Field("route", "purchase_to_renewal"),
-				logger.Field("anchor_user_subscribe_id", anchorSub.Id),
+				logger.Field("anchor_user_subscribe_id", decision.Anchor.Id),
 				logger.Field("user_id", u.Id),
 			)
-		case errors.Is(anchorErr, gorm.ErrRecordNotFound):
-		case anchorErr != nil:
-			l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", anchorErr.Error()), logger.Field("user_id", u.Id))
-			return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find single mode anchor subscribe error: %v", anchorErr.Error())
 		}
 	}