Merge branch 'main' of github.com:Wei-Shaw/sub2api

backend/internal/service/user.go

@@ -21,6 +21,11 @@ type User struct {
 	CreatedAt     time.Time
 	UpdatedAt     time.Time
 
+	// TOTP 双因素认证字段
+	TotpSecretEncrypted *string    // AES-256-GCM 加密的 TOTP 密钥
+	TotpEnabled         bool       // 是否启用 TOTP
+	TotpEnabledAt       *time.Time // TOTP 启用时间
+
 	APIKeys       []APIKey
 	Subscriptions []UserSubscription
 }