refactor: 调整项目结构为单向依赖

backend/internal/service/domain_constants.go

@@ -0,0 +1,96 @@
+package service
+
+// Status constants
+const (
+	StatusActive   = "active"
+	StatusDisabled = "disabled"
+	StatusError    = "error"
+	StatusUnused   = "unused"
+	StatusUsed     = "used"
+	StatusExpired  = "expired"
+)
+
+// Role constants
+const (
+	RoleAdmin = "admin"
+	RoleUser  = "user"
+)
+
+// Platform constants
+const (
+	PlatformAnthropic = "anthropic"
+	PlatformOpenAI    = "openai"
+	PlatformGemini    = "gemini"
+)
+
+// Account type constants
+const (
+	AccountTypeOAuth      = "oauth"       // OAuth类型账号（full scope: profile + inference）
+	AccountTypeSetupToken = "setup-token" // Setup Token类型账号（inference only scope）
+	AccountTypeApiKey     = "apikey"      // API Key类型账号
+)
+
+// Redeem type constants
+const (
+	RedeemTypeBalance      = "balance"
+	RedeemTypeConcurrency  = "concurrency"
+	RedeemTypeSubscription = "subscription"
+)
+
+// Admin adjustment type constants
+const (
+	AdjustmentTypeAdminBalance     = "admin_balance"     // 管理员调整余额
+	AdjustmentTypeAdminConcurrency = "admin_concurrency" // 管理员调整并发数
+)
+
+// Group subscription type constants
+const (
+	SubscriptionTypeStandard     = "standard"     // 标准计费模式（按余额扣费）
+	SubscriptionTypeSubscription = "subscription" // 订阅模式（按限额控制）
+)
+
+// Subscription status constants
+const (
+	SubscriptionStatusActive    = "active"
+	SubscriptionStatusExpired   = "expired"
+	SubscriptionStatusSuspended = "suspended"
+)
+
+// Setting keys
+const (
+	// 注册设置
+	SettingKeyRegistrationEnabled = "registration_enabled" // 是否开放注册
+	SettingKeyEmailVerifyEnabled  = "email_verify_enabled" // 是否开启邮件验证
+
+	// 邮件服务设置
+	SettingKeySmtpHost     = "smtp_host"      // SMTP服务器地址
+	SettingKeySmtpPort     = "smtp_port"      // SMTP端口
+	SettingKeySmtpUsername = "smtp_username"  // SMTP用户名
+	SettingKeySmtpPassword = "smtp_password"  // SMTP密码（加密存储）
+	SettingKeySmtpFrom     = "smtp_from"      // 发件人地址
+	SettingKeySmtpFromName = "smtp_from_name" // 发件人名称
+	SettingKeySmtpUseTLS   = "smtp_use_tls"   // 是否使用TLS
+
+	// Cloudflare Turnstile 设置
+	SettingKeyTurnstileEnabled   = "turnstile_enabled"    // 是否启用 Turnstile 验证
+	SettingKeyTurnstileSiteKey   = "turnstile_site_key"   // Turnstile Site Key
+	SettingKeyTurnstileSecretKey = "turnstile_secret_key" // Turnstile Secret Key
+
+	// OEM设置
+	SettingKeySiteName     = "site_name"     // 网站名称
+	SettingKeySiteLogo     = "site_logo"     // 网站Logo (base64)
+	SettingKeySiteSubtitle = "site_subtitle" // 网站副标题
+	SettingKeyApiBaseUrl   = "api_base_url"  // API端点地址（用于客户端配置和导入）
+	SettingKeyContactInfo  = "contact_info"  // 客服联系方式
+	SettingKeyDocUrl       = "doc_url"       // 文档链接
+
+	// 默认配置
+	SettingKeyDefaultConcurrency = "default_concurrency" // 新用户默认并发量
+	SettingKeyDefaultBalance     = "default_balance"     // 新用户默认余额
+
+	// 管理员 API Key
+	SettingKeyAdminApiKey = "admin_api_key" // 全局管理员 API Key（用于外部系统集成）
+)
+
+// Admin API Key prefix (distinct from user "sk-" keys)
+const AdminApiKeyPrefix = "admin-"