新功能(#69): 用户级限速覆盖 — 数据层 + 核心逻辑 + 管理接口

- 新增 migration 02153: user_subscribe 表添加 speed_limit、traffic_limit 列（幂等）
- model 层 Subscribe/SubscribeDetails 新增用户级限速字段（*string 类型支持 nil 回退）
- server 用户列表和管理员详情接口支持用户级限速覆盖优先级计算
- 更新管理员订阅更新接口支持写入/清除用户级限速

Co-authored-by: multica-agent <github@multica.ai>

internal/logic/admin/user/getUserSubscribeByIdLogic.go

@@ -2,6 +2,7 @@ package user
 
 import (
 	"context"
+	"encoding/json"
 
 	"github.com/perfect-panel/server/internal/model/group"
 	"github.com/perfect-panel/server/internal/svc"
@@ -36,6 +37,13 @@ func (l *GetUserSubscribeByIdLogic) GetUserSubscribeById(req *types.GetUserSubsc
 	}
 	var subscribeDetails types.UserSubscribeDetail
 	tool.DeepCopy(&subscribeDetails, sub)
+	subscribeDetails.SpeedLimit = sub.SpeedLimit
+	if sub.TrafficLimit != nil && *sub.TrafficLimit != "" {
+		_ = json.Unmarshal([]byte(*sub.TrafficLimit), &subscribeDetails.TrafficLimit)
+	}
+	if sub.Subscribe != nil {
+		subscribeDetails.PlanSpeedLimit = sub.Subscribe.SpeedLimit
+	}
 
 	// 填充分组名
 	if sub.NodeGroupId > 0 {
@@ -47,7 +55,17 @@ func (l *GetUserSubscribeByIdLogic) GetUserSubscribeById(req *types.GetUserSubsc
 
 	// Calculate speed limit status
 	if sub.Subscribe != nil && sub.Status == 1 {
-		result := speedlimit.Calculate(l.ctx, l.svcCtx.DB, sub.UserId, sub.Id, sub.Subscribe.SpeedLimit, sub.Subscribe.TrafficLimit)
+		baseSpeed := sub.Subscribe.SpeedLimit
+		if sub.SpeedLimit > 0 {
+			baseSpeed = sub.SpeedLimit
+		}
+
+		trafficLimit := sub.Subscribe.TrafficLimit
+		if sub.TrafficLimit != nil && *sub.TrafficLimit != "" {
+			trafficLimit = *sub.TrafficLimit
+		}
+
+		result := speedlimit.Calculate(l.ctx, l.svcCtx.DB, sub.UserId, sub.Id, baseSpeed, trafficLimit)
 		subscribeDetails.EffectiveSpeed = result.EffectiveSpeed
 		subscribeDetails.IsThrottled = result.IsThrottled
 		subscribeDetails.ThrottleRule = result.ThrottleRule

internal/logic/admin/user/updateUserSubscribeLogic.go

@@ -45,7 +45,7 @@ func (l *UpdateUserSubscribeLogic) UpdateUserSubscribe(req *types.UpdateUserSubs
 	}
 	trafficLimit := userSub.TrafficLimit
 	if req.TrafficLimit != nil {
-		trafficLimit = *req.TrafficLimit
+		trafficLimit = req.TrafficLimit
 	}
 
 	err = l.svcCtx.UserModel.UpdateSubscribe(l.ctx, &user.Subscribe{

internal/logic/server/getServerUserListLogic.go

@@ -307,14 +307,24 @@ func (l *GetServerUserListLogic) canUseExpiredNodeGroup(userSub *user.Subscribe,
 
 // calculateEffectiveSpeedLimit 计算用户的实际限速值（考虑按量限速规则）
 func (l *GetServerUserListLogic) calculateEffectiveSpeedLimit(sub *subscribe.Subscribe, userSub *user.Subscribe) int64 {
+	baseSpeed := sub.SpeedLimit
+	if userSub.SpeedLimit > 0 {
+		baseSpeed = userSub.SpeedLimit
+	}
+
+	trafficLimit := sub.TrafficLimit
+	if userSub.TrafficLimit != nil && *userSub.TrafficLimit != "" {
+		trafficLimit = *userSub.TrafficLimit
+	}
+
 	result := speedlimit.CalculateWithCache(
 		l.ctx.Request.Context(),
 		l.svcCtx.Redis,
 		l.svcCtx.DB,
 		userSub.UserId,
 		userSub.Id,
-		sub.SpeedLimit,
-		sub.TrafficLimit,
+		baseSpeed,
+		trafficLimit,
 		30*time.Second,
 	)
 	return result.EffectiveSpeed

internal/model/user/model.go

@@ -23,25 +23,27 @@ const (
 )
 
 type SubscribeDetails struct {
-	Id          int64                `gorm:"primarykey"`
-	UserId      int64                `gorm:"index:idx_user_id;not null;comment:User ID"`
-	User        *User                `gorm:"foreignKey:UserId;references:Id"`
-	OrderId     int64                `gorm:"index:idx_order_id;not null;comment:Order ID"`
-	SubscribeId int64                `gorm:"index:idx_subscribe_id;not null;comment:Subscription ID"`
-	Subscribe   *subscribe.Subscribe `gorm:"foreignKey:SubscribeId;references:Id"`
-	NodeGroupId int64                `gorm:"index:idx_node_group_id;not null;default:0;comment:Node Group ID (single ID)"`
-	StartTime   time.Time            `gorm:"default:CURRENT_TIMESTAMP(3);not null;comment:Subscription Start Time"`
-	ExpireTime  time.Time            `gorm:"default:NULL;comment:Subscription Expire Time"`
-	FinishedAt  *time.Time           `gorm:"default:NULL;comment:Finished Time"`
-	Traffic     int64                `gorm:"default:0;comment:Traffic"`
-	Download    int64                `gorm:"default:0;comment:Download Traffic"`
-	Upload      int64                `gorm:"default:0;comment:Upload Traffic"`
-	Token       string               `gorm:"index:idx_token;unique;type:varchar(255);default:'';comment:Token"`
-	UUID        string               `gorm:"type:varchar(255);unique;index:idx_uuid;default:'';comment:UUID"`
-	Status      uint8                `gorm:"type:tinyint(1);default:0;comment:Subscription Status: 0: Pending 1: Active 2: Finished 3: Expired; 4: Cancelled"`
-	Note        string               `gorm:"type:varchar(500);default:'';comment:User note for subscription"`
-	CreatedAt   time.Time            `gorm:"<-:create;comment:Creation Time"`
-	UpdatedAt   time.Time            `gorm:"comment:Update Time"`
+	Id           int64                `gorm:"primarykey"`
+	UserId       int64                `gorm:"index:idx_user_id;not null;comment:User ID"`
+	User         *User                `gorm:"foreignKey:UserId;references:Id"`
+	OrderId      int64                `gorm:"index:idx_order_id;not null;comment:Order ID"`
+	SubscribeId  int64                `gorm:"index:idx_subscribe_id;not null;comment:Subscription ID"`
+	Subscribe    *subscribe.Subscribe `gorm:"foreignKey:SubscribeId;references:Id"`
+	NodeGroupId  int64                `gorm:"index:idx_node_group_id;not null;default:0;comment:Node Group ID (single ID)"`
+	StartTime    time.Time            `gorm:"default:CURRENT_TIMESTAMP(3);not null;comment:Subscription Start Time"`
+	ExpireTime   time.Time            `gorm:"default:NULL;comment:Subscription Expire Time"`
+	FinishedAt   *time.Time           `gorm:"default:NULL;comment:Finished Time"`
+	Traffic      int64                `gorm:"default:0;comment:Traffic"`
+	Download     int64                `gorm:"default:0;comment:Download Traffic"`
+	Upload       int64                `gorm:"default:0;comment:Upload Traffic"`
+	SpeedLimit   int64                `gorm:"default:0;comment:User-level speed limit override (Mbps), 0 uses plan-level"`
+	TrafficLimit *string              `gorm:"type:text;default:null;comment:User-level traffic limit override (JSON), NULL uses plan-level"`
+	Token        string               `gorm:"index:idx_token;unique;type:varchar(255);default:'';comment:Token"`
+	UUID         string               `gorm:"type:varchar(255);unique;index:idx_uuid;default:'';comment:UUID"`
+	Status       uint8                `gorm:"type:tinyint(1);default:0;comment:Subscription Status: 0: Pending 1: Active 2: Finished 3: Expired; 4: Cancelled"`
+	Note         string               `gorm:"type:varchar(500);default:'';comment:User note for subscription"`
+	CreatedAt    time.Time            `gorm:"<-:create;comment:Creation Time"`
+	UpdatedAt    time.Time            `gorm:"comment:Update Time"`
 }
 
 type SubscribeLogFilterParams struct {

internal/model/user/user.go

@@ -101,10 +101,10 @@ type Subscribe struct {
 	Traffic         int64      `gorm:"default:0;comment:Traffic"`
 	Download        int64      `gorm:"default:0;comment:Download Traffic"`
 	Upload          int64      `gorm:"default:0;comment:Upload Traffic"`
-	SpeedLimit      int64      `gorm:"default:0;comment:User-level speed limit override (Mbps, 0=use plan default)"`
-	TrafficLimit    string     `gorm:"type:text;default:null;comment:User-level traffic limit rules override (JSON)"`
 	ExpiredDownload int64      `gorm:"default:0;comment:Expired period download traffic (bytes)"`
 	ExpiredUpload   int64      `gorm:"default:0;comment:Expired period upload traffic (bytes)"`
+	SpeedLimit      int64      `gorm:"default:0;comment:User-level speed limit override (Mbps), 0 uses plan-level"`
+	TrafficLimit    *string    `gorm:"type:text;default:null;comment:User-level traffic limit override (JSON), NULL uses plan-level"`
 	Token           string     `gorm:"index:idx_token;unique;type:varchar(255);default:'';comment:Token"`
 	UUID            string     `gorm:"type:varchar(255);unique;index:idx_uuid;default:'';comment:UUID"`
 	Status          uint8      `gorm:"type:tinyint(1);default:0;comment:Subscription Status: 0: Pending 1: Active 2: Finished 3: Expired 4: Deducted 5: stopped"`