feat(auth): 实现用户会话数限制功能

添加用户会话数限制功能，当超过最大会话数时自动移除最旧的会话
- 在config中添加UserSessionsKeyPrefix常量
- 在JwtAuth配置中新增MaxSessionsPerUser字段
- 在ServiceContext中实现EnforceUserSessionLimit方法
- 在所有登录逻辑中调用会话限制检查

internal/svc/serviceContext.go

@@ -1,34 +1,36 @@
 package svc
 
 import (
-	"context"
+    "context"
+    "fmt"
+    "time"
 
-	"github.com/perfect-panel/server/internal/model/client"
-	"github.com/perfect-panel/server/internal/model/node"
-	"github.com/perfect-panel/server/pkg/device"
+    "github.com/perfect-panel/server/internal/model/client"
+    "github.com/perfect-panel/server/internal/model/node"
+    "github.com/perfect-panel/server/pkg/device"
 
-	"github.com/perfect-panel/server/internal/config"
-	"github.com/perfect-panel/server/internal/model/ads"
-	"github.com/perfect-panel/server/internal/model/announcement"
-	"github.com/perfect-panel/server/internal/model/auth"
-	"github.com/perfect-panel/server/internal/model/coupon"
-	"github.com/perfect-panel/server/internal/model/document"
-	"github.com/perfect-panel/server/internal/model/log"
-	"github.com/perfect-panel/server/internal/model/order"
-	"github.com/perfect-panel/server/internal/model/payment"
-	"github.com/perfect-panel/server/internal/model/subscribe"
-	"github.com/perfect-panel/server/internal/model/system"
-	"github.com/perfect-panel/server/internal/model/ticket"
-	"github.com/perfect-panel/server/internal/model/traffic"
-	"github.com/perfect-panel/server/internal/model/user"
-	"github.com/perfect-panel/server/pkg/limit"
-	"github.com/perfect-panel/server/pkg/nodeMultiplier"
-	"github.com/perfect-panel/server/pkg/orm"
+    "github.com/perfect-panel/server/internal/config"
+    "github.com/perfect-panel/server/internal/model/ads"
+    "github.com/perfect-panel/server/internal/model/announcement"
+    "github.com/perfect-panel/server/internal/model/auth"
+    "github.com/perfect-panel/server/internal/model/coupon"
+    "github.com/perfect-panel/server/internal/model/document"
+    "github.com/perfect-panel/server/internal/model/log"
+    "github.com/perfect-panel/server/internal/model/order"
+    "github.com/perfect-panel/server/internal/model/payment"
+    "github.com/perfect-panel/server/internal/model/subscribe"
+    "github.com/perfect-panel/server/internal/model/system"
+    "github.com/perfect-panel/server/internal/model/ticket"
+    "github.com/perfect-panel/server/internal/model/traffic"
+    "github.com/perfect-panel/server/internal/model/user"
+    "github.com/perfect-panel/server/pkg/limit"
+    "github.com/perfect-panel/server/pkg/nodeMultiplier"
+    "github.com/perfect-panel/server/pkg/orm"
 
-	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
-	"github.com/hibiken/asynq"
-	"github.com/redis/go-redis/v9"
-	"gorm.io/gorm"
+    tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
+    "github.com/hibiken/asynq"
+    "github.com/redis/go-redis/v9"
+    "gorm.io/gorm"
 )
 
 type ServiceContext struct {
@@ -108,7 +110,34 @@ func NewServiceContext(c config.Config) *ServiceContext {
 		TrafficLogModel:   traffic.NewModel(db),
 		AnnouncementModel: announcement.NewModel(db, rds),
 	}
-	srv.DeviceManager = NewDeviceManager(srv)
-	return srv
+    srv.DeviceManager = NewDeviceManager(srv)
+    return srv
 
 }
+
+func (srv *ServiceContext) EnforceUserSessionLimit(ctx context.Context, userId int64, newSessionId string, max int64) error {
+    if max <= 0 {
+        return nil
+    }
+    sessionsKey := fmt.Sprintf("%s%v", config.UserSessionsKeyPrefix, userId)
+    now := time.Now().Unix()
+    if err := srv.Redis.ZAdd(ctx, sessionsKey, redis.Z{Score: float64(now), Member: newSessionId}).Err(); err != nil {
+        return err
+    }
+    count, err := srv.Redis.ZCard(ctx, sessionsKey).Result()
+    if err != nil {
+        return err
+    }
+    if count > max {
+        popped, err := srv.Redis.ZPopMin(ctx, sessionsKey, count-max).Result()
+        if err != nil {
+            return err
+        }
+        for _, z := range popped {
+            sid := fmt.Sprintf("%v", z.Member)
+            _ = srv.Redis.Del(ctx, fmt.Sprintf("%v:%v", config.SessionIdKey, sid)).Err()
+        }
+    }
+    _ = srv.Redis.Expire(ctx, sessionsKey, time.Duration(srv.Config.JwtAuth.AccessExpire)*time.Second).Err()
+    return nil
+}