Merge branch 'Wei-Shaw:main' into main

backend/internal/service/ops_trend_models.go

@@ -6,6 +6,7 @@ type OpsThroughputTrendPoint struct {
 	BucketStart   time.Time `json:"bucket_start"`
 	RequestCount  int64     `json:"request_count"`
 	TokenConsumed int64     `json:"token_consumed"`
+	SwitchCount   int64     `json:"switch_count"`
 	QPS           float64   `json:"qps"`
 	TPS           float64   `json:"tps"`
 }

backend/internal/service/user_service.go

@@ -39,7 +39,7 @@ type UserRepository interface {
 	ExistsByEmail(ctx context.Context, email string) (bool, error)
 	RemoveGroupFromAllowedGroups(ctx context.Context, groupID int64) (int64, error)
 
-	// TOTP 相关方法
+	// TOTP 双因素认证
 	UpdateTotpSecret(ctx context.Context, userID int64, encryptedSecret *string) error
 	EnableTotp(ctx context.Context, userID int64) error
 	DisableTotp(ctx context.Context, userID int64) error

backend/migrations/042b_add_ops_system_metrics_switch_count.sql

+-- ops_system_metrics 增加账号切换次数统计（按分钟窗口）
+ALTER TABLE ops_system_metrics
+    ADD COLUMN IF NOT EXISTS account_switch_count BIGINT NOT NULL DEFAULT 0;