让 C 端在续费前展示当前应付价格

Constraint: 续费展示价必须与当前销售渠道的生效零售价一致
Rejected: 新增专用续费报价接口 | 现有资产信息已承载续费入口上下文
Confidence: high
Scope-risk: narrow
Directive: 下单时仍须重新校验续费资格和最终价格
Tested: go build ./internal/handler/app
Not-tested: 按用户要求未添加或运行测试

internal/handler/app/client_asset.go

@@ -191,6 +191,10 @@ func (h *ClientAssetHandler) GetAssetInfo(c *fiber.Ctx) error {
 	if err != nil {
 		return err
 	}
+	renewalPrice, err := h.getRenewalPrice(resolved.SkipPermissionCtx, currentPackageID, resolved.SellerShopID)
+	if err != nil {
+		return err
+	}
 	if h.paymentMethodPolicy == nil {
 		return errors.New(errors.CodeNoPaymentConfig)
 	}
@@ -239,6 +243,7 @@ func (h *ClientAssetHandler) GetAssetInfo(c *fiber.Ctx) error {
 		ActivatedAt:               resolved.Asset.ActivatedAt,
 		CurrentPackage:            resolved.Asset.CurrentPackage,
 		CurrentPackageID:          currentPackageID,
+		RenewalPrice:              renewalPrice,
 		CurrentPackageUsageID:     resolved.Asset.CurrentPackageUsageID,
 		CurrentPackageActivatedAt: resolved.Asset.CurrentPackageActivatedAt,
 		CurrentPackageExpiresAt:   resolved.Asset.CurrentPackageExpiresAt,
@@ -302,6 +307,26 @@ func (h *ClientAssetHandler) getCurrentPackageID(ctx context.Context, usageID *u
 	return usage.PackageID, nil
 }
 
+func (h *ClientAssetHandler) getRenewalPrice(ctx context.Context, packageID, sellerShopID uint) (int64, error) {
+	if packageID == 0 {
+		return 0, nil
+	}
+
+	pkg, err := h.packageStore.GetByID(ctx, packageID)
+	if err != nil {
+		return 0, errors.Wrap(errors.CodeDatabaseError, err, "查询续费套餐失败")
+	}
+	if sellerShopID == 0 {
+		return packageprice.PackageEffectiveRetailPrice(pkg), nil
+	}
+
+	allocation, err := h.shopPackageAllocationStore.GetByShopAndPackageForSystem(ctx, sellerShopID, packageID)
+	if err != nil {
+		return 0, errors.Wrap(errors.CodeDatabaseError, err, "查询续费套餐价格失败")
+	}
+	return packageprice.AllocationEffectiveRetailPrice(allocation), nil
+}
+
 func (h *ClientAssetHandler) dispatchAssetReadObservations(ctx context.Context, asset *dto.AssetResolveResponse) {
 	if h.observationSeries == nil || asset == nil {
 		return