feat(iap/apple): 从Apple商品ID解析购买数量并匹配订阅折扣

添加从Apple商品ID中解析购买数量（天数）的逻辑，并基于订阅列表的折扣配置进行匹配。当商品ID包含"day"时，提取后续数字作为购买数量，然后查找对应数量的订阅折扣配置。

internal/logic/public/iap/apple/attachTransactionLogic.go

@@ -6,11 +6,14 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
+	"strconv"
+	"strings"
 	"time"
 
 	"github.com/google/uuid"
 	"github.com/hibiken/asynq"
 	iapmodel "github.com/perfect-panel/server/internal/model/iap/apple"
+	"github.com/perfect-panel/server/internal/model/subscribe"
 	"github.com/perfect-panel/server/internal/model/user"
 	"github.com/perfect-panel/server/internal/svc"
 	"github.com/perfect-panel/server/internal/types"
@@ -54,18 +57,67 @@ func (l *AttachTransactionLogic) Attach(req *types.AttachAppleTransactionRequest
 	var existTx *iapmodel.Transaction
 	existTx, _ = iapmodel.NewModel(l.svcCtx.DB, l.svcCtx.Redis).FindByOriginalId(l.ctx, txPayload.OriginalTransactionId)
 	l.Infow("幂等等检查", logger.Field("originalTransactionId", txPayload.OriginalTransactionId), logger.Field("exists", existTx != nil && existTx.Id > 0))
-	pm, _ := iapapple.ParseProductMap(l.svcCtx.Config.Site.CustomData)
-	m, ok := pm.Items[txPayload.ProductId]
-	l.Infow("商品映射解析", logger.Field("items_count", len(pm.Items)), logger.Field("命中映射", ok))
+
+	// 从 Apple 商品ID中解析购买数量（天数），形如 com.hifastvpn.plan.day7 -> 7
+	var parsedQuantity int64
+	if idx := strings.Index(strings.ToLower(txPayload.ProductId), "day"); idx >= 0 {
+		sub := txPayload.ProductId[idx+3:]
+		for i := 0; i < len(sub); i++ {
+			if sub[i] < '0' || sub[i] > '9' {
+				sub = sub[:i]
+				break
+			}
+		}
+		if q, e := strconv.ParseInt(sub, 10, 64); e == nil && q > 0 {
+			parsedQuantity = q
+		}
+	}
+	l.Infow("商品映射解析", logger.Field("productId", txPayload.ProductId), logger.Field("解析数量", parsedQuantity))
+
+	// 基于订阅列表的折扣配置做匹配：UnitTime=Day 且 Discount.quantity == parsedQuantity
 	var duration int64
 	var tier string
 	var subscribeId int64
-	if ok {
-		duration = m.DurationDays
-		tier = m.Tier
-		subscribeId = m.SubscribeId
-		l.Infow("命中商品映射", logger.Field("productId", txPayload.ProductId), logger.Field("durationDays", duration), logger.Field("tier", tier), logger.Field("subscribeId", subscribeId))
+	if parsedQuantity > 0 {
+		_, subs, e := l.svcCtx.SubscribeModel.FilterList(l.ctx, &subscribe.FilterParams{
+			Page:            1,
+			Size:            9999,
+			Show:            true,
+			Sell:            true,
+			DefaultLanguage: true,
+		})
+		if e == nil && len(subs) > 0 {
+			for _, item := range subs {
+				if !strings.EqualFold(item.UnitTime, "Day") {
+					continue
+				}
+				var discounts []types.SubscribeDiscount
+				if item.Discount != "" {
+					_ = json.Unmarshal([]byte(item.Discount), &discounts)
+				}
+				for _, d := range discounts {
+					if int64(d.Quantity) == parsedQuantity {
+						duration = parsedQuantity
+						subscribeId = item.Id
+						tier = item.Name
+						l.Infow("订阅映射命中", logger.Field("subscribeId", subscribeId), logger.Field("name", tier), logger.Field("durationDays", duration))
+						break
+					}
+				}
+				if subscribeId > 0 {
+					break
+				}
+			}
 		} else {
+			l.Infow("订阅列表为空或查询失败", logger.Field("error", func() string {
+				if e != nil {
+					return e.Error()
+				}
+				return ""
+			}()))
+		}
+	}
+	if subscribeId == 0 {
 		// fallback from order_no if provided
 		if req.OrderNo != "" {
 			if ord, e := l.svcCtx.OrderModel.FindOneByOrderNo(l.ctx, req.OrderNo); e == nil && ord != nil && ord.Id != 0 {