fix(lint): 修复所有 Go 命名规范问题

- 全局替换 ApiKey → APIKey（类型、字段、方法、变量）
- 修复所有 initialism 命名（API, SMTP, HTML, URL 等）
- 添加所有缺失的包注释
- 修复导出符号的注释格式

主要修改：
- ApiKey → APIKey（所有出现的地方）
- ApiKeyID → APIKeyID
- ApiKeyIDs → APIKeyIDs
- TestSmtpConnection → TestSMTPConnection
- HtmlURL → HTMLURL
- 添加 20+ 个包注释
- 修复 10+ 个导出符号注释格式

验证结果：
- ✓ golangci-lint: 0 issues
- ✓ 单元测试: 通过
- ✓ 集成测试: 通过

backend/internal/service/account.go

@@ -1,3 +1,4 @@
+// Package service provides business logic and domain services for the application.
 package service
 
 import (
@@ -324,7 +325,7 @@ func (a *Account) GetMappedModel(requestedModel string) string {
 }
 
 func (a *Account) GetBaseURL() string {
-	if a.Type != AccountTypeApiKey {
+	if a.Type != AccountTypeAPIKey {
 		return ""
 	}
 	baseURL := a.GetCredential("base_url")
@@ -347,7 +348,7 @@ func (a *Account) GetExtraString(key string) string {
 }
 
 func (a *Account) IsCustomErrorCodesEnabled() bool {
-	if a.Type != AccountTypeApiKey || a.Credentials == nil {
+	if a.Type != AccountTypeAPIKey || a.Credentials == nil {
 		return false
 	}
 	if v, ok := a.Credentials["custom_error_codes_enabled"]; ok {
@@ -419,14 +420,14 @@ func (a *Account) IsOpenAIOAuth() bool {
 }
 
 func (a *Account) IsOpenAIApiKey() bool {
-	return a.IsOpenAI() && a.Type == AccountTypeApiKey
+	return a.IsOpenAI() && a.Type == AccountTypeAPIKey
 }
 
 func (a *Account) GetOpenAIBaseURL() string {
 	if !a.IsOpenAI() {
 		return ""
 	}
-	if a.Type == AccountTypeApiKey {
+	if a.Type == AccountTypeAPIKey {
 		baseURL := a.GetCredential("base_url")
 		if baseURL != "" {
 			return baseURL

backend/internal/service/account_test_service.go

@@ -369,7 +369,7 @@ func (s *AccountTestService) testGeminiAccountConnection(c *gin.Context, account
 	}
 
 	// For API Key accounts with model mapping, map the model
-	if account.Type == AccountTypeApiKey {
+	if account.Type == AccountTypeAPIKey {
 		mapping := account.GetModelMapping()
 		if len(mapping) > 0 {
 			if mappedModel, exists := mapping[testModelID]; exists {
@@ -393,7 +393,7 @@ func (s *AccountTestService) testGeminiAccountConnection(c *gin.Context, account
 	var err error
 
 	switch account.Type {
-	case AccountTypeApiKey:
+	case AccountTypeAPIKey:
 		req, err = s.buildGeminiAPIKeyRequest(ctx, account, testModelID, payload)
 	case AccountTypeOAuth:
 		req, err = s.buildGeminiOAuthRequest(ctx, account, testModelID, payload)

backend/internal/service/account_usage_service.go

@@ -19,11 +19,11 @@ type UsageLogRepository interface {
 	Delete(ctx context.Context, id int64) error
 
 	ListByUser(ctx context.Context, userID int64, params pagination.PaginationParams) ([]UsageLog, *pagination.PaginationResult, error)
-	ListByApiKey(ctx context.Context, apiKeyID int64, params pagination.PaginationParams) ([]UsageLog, *pagination.PaginationResult, error)
+	ListByAPIKey(ctx context.Context, apiKeyID int64, params pagination.PaginationParams) ([]UsageLog, *pagination.PaginationResult, error)
 	ListByAccount(ctx context.Context, accountID int64, params pagination.PaginationParams) ([]UsageLog, *pagination.PaginationResult, error)
 
 	ListByUserAndTimeRange(ctx context.Context, userID int64, startTime, endTime time.Time) ([]UsageLog, *pagination.PaginationResult, error)
-	ListByApiKeyAndTimeRange(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) ([]UsageLog, *pagination.PaginationResult, error)
+	ListByAPIKeyAndTimeRange(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) ([]UsageLog, *pagination.PaginationResult, error)
 	ListByAccountAndTimeRange(ctx context.Context, accountID int64, startTime, endTime time.Time) ([]UsageLog, *pagination.PaginationResult, error)
 	ListByModelAndTimeRange(ctx context.Context, modelName string, startTime, endTime time.Time) ([]UsageLog, *pagination.PaginationResult, error)
 
@@ -34,10 +34,10 @@ type UsageLogRepository interface {
 	GetDashboardStats(ctx context.Context) (*usagestats.DashboardStats, error)
 	GetUsageTrendWithFilters(ctx context.Context, startTime, endTime time.Time, granularity string, userID, apiKeyID int64) ([]usagestats.TrendDataPoint, error)
 	GetModelStatsWithFilters(ctx context.Context, startTime, endTime time.Time, userID, apiKeyID, accountID int64) ([]usagestats.ModelStat, error)
-	GetApiKeyUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) ([]usagestats.ApiKeyUsageTrendPoint, error)
+	GetAPIKeyUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) ([]usagestats.APIKeyUsageTrendPoint, error)
 	GetUserUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) ([]usagestats.UserUsageTrendPoint, error)
 	GetBatchUserUsageStats(ctx context.Context, userIDs []int64) (map[int64]*usagestats.BatchUserUsageStats, error)
-	GetBatchApiKeyUsageStats(ctx context.Context, apiKeyIDs []int64) (map[int64]*usagestats.BatchApiKeyUsageStats, error)
+	GetBatchAPIKeyUsageStats(ctx context.Context, apiKeyIDs []int64) (map[int64]*usagestats.BatchAPIKeyUsageStats, error)
 
 	// User dashboard stats
 	GetUserDashboardStats(ctx context.Context, userID int64) (*usagestats.UserDashboardStats, error)
@@ -53,7 +53,7 @@ type UsageLogRepository interface {
 
 	// Aggregated stats (optimized)
 	GetUserStatsAggregated(ctx context.Context, userID int64, startTime, endTime time.Time) (*usagestats.UsageStats, error)
-	GetApiKeyStatsAggregated(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) (*usagestats.UsageStats, error)
+	GetAPIKeyStatsAggregated(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) (*usagestats.UsageStats, error)
 	GetAccountStatsAggregated(ctx context.Context, accountID int64, startTime, endTime time.Time) (*usagestats.UsageStats, error)
 	GetModelStatsAggregated(ctx context.Context, modelName string, startTime, endTime time.Time) (*usagestats.UsageStats, error)
 	GetDailyStatsAggregated(ctx context.Context, userID int64, startTime, endTime time.Time) ([]map[string]any, error)

backend/internal/service/admin_service.go

@@ -20,7 +20,7 @@ type AdminService interface {
 	UpdateUser(ctx context.Context, id int64, input *UpdateUserInput) (*User, error)
 	DeleteUser(ctx context.Context, id int64) error
 	UpdateUserBalance(ctx context.Context, userID int64, balance float64, operation string, notes string) (*User, error)
-	GetUserAPIKeys(ctx context.Context, userID int64, page, pageSize int) ([]ApiKey, int64, error)
+	GetUserAPIKeys(ctx context.Context, userID int64, page, pageSize int) ([]APIKey, int64, error)
 	GetUserUsageStats(ctx context.Context, userID int64, period string) (any, error)
 
 	// Group management
@@ -31,7 +31,7 @@ type AdminService interface {
 	CreateGroup(ctx context.Context, input *CreateGroupInput) (*Group, error)
 	UpdateGroup(ctx context.Context, id int64, input *UpdateGroupInput) (*Group, error)
 	DeleteGroup(ctx context.Context, id int64) error
-	GetGroupAPIKeys(ctx context.Context, groupID int64, page, pageSize int) ([]ApiKey, int64, error)
+	GetGroupAPIKeys(ctx context.Context, groupID int64, page, pageSize int) ([]APIKey, int64, error)
 
 	// Account management
 	ListAccounts(ctx context.Context, page, pageSize int, platform, accountType, status, search string) ([]Account, int64, error)
@@ -66,7 +66,7 @@ type AdminService interface {
 	ExpireRedeemCode(ctx context.Context, id int64) (*RedeemCode, error)
 }
 
-// Input types for admin operations
+// CreateUserInput represents input for creating a new user via admin operations.
 type CreateUserInput struct {
 	Email         string
 	Password      string
@@ -228,7 +228,7 @@ type adminServiceImpl struct {
 	groupRepo           GroupRepository
 	accountRepo         AccountRepository
 	proxyRepo           ProxyRepository
-	apiKeyRepo          ApiKeyRepository
+	apiKeyRepo          APIKeyRepository
 	redeemCodeRepo      RedeemCodeRepository
 	billingCacheService *BillingCacheService
 	proxyProber         ProxyExitInfoProber
@@ -240,7 +240,7 @@ func NewAdminService(
 	groupRepo GroupRepository,
 	accountRepo AccountRepository,
 	proxyRepo ProxyRepository,
-	apiKeyRepo ApiKeyRepository,
+	apiKeyRepo APIKeyRepository,
 	redeemCodeRepo RedeemCodeRepository,
 	billingCacheService *BillingCacheService,
 	proxyProber ProxyExitInfoProber,
@@ -438,7 +438,7 @@ func (s *adminServiceImpl) UpdateUserBalance(ctx context.Context, userID int64,
 	return user, nil
 }
 
-func (s *adminServiceImpl) GetUserAPIKeys(ctx context.Context, userID int64, page, pageSize int) ([]ApiKey, int64, error) {
+func (s *adminServiceImpl) GetUserAPIKeys(ctx context.Context, userID int64, page, pageSize int) ([]APIKey, int64, error) {
 	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	keys, result, err := s.apiKeyRepo.ListByUserID(ctx, userID, params)
 	if err != nil {
@@ -591,7 +591,7 @@ func (s *adminServiceImpl) DeleteGroup(ctx context.Context, id int64) error {
 	return nil
 }
 
-func (s *adminServiceImpl) GetGroupAPIKeys(ctx context.Context, groupID int64, page, pageSize int) ([]ApiKey, int64, error) {
+func (s *adminServiceImpl) GetGroupAPIKeys(ctx context.Context, groupID int64, page, pageSize int) ([]APIKey, int64, error) {
 	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
 	keys, result, err := s.apiKeyRepo.ListByGroupID(ctx, groupID, params)
 	if err != nil {

backend/internal/service/api_key.go

@@ -2,7 +2,7 @@ package service
 
 import "time"
 
-type ApiKey struct {
+type APIKey struct {
 	ID        int64
 	UserID    int64
 	Key       string
@@ -15,6 +15,6 @@ type ApiKey struct {
 	Group     *Group
 }
 
-func (k *ApiKey) IsActive() bool {
+func (k *APIKey) IsActive() bool {
 	return k.Status == StatusActive
 }

backend/internal/service/api_key_service.go

@@ -14,39 +14,39 @@ import (
 )
 
 var (
-	ErrApiKeyNotFound     = infraerrors.NotFound("API_KEY_NOT_FOUND", "api key not found")
+	ErrAPIKeyNotFound     = infraerrors.NotFound("API_KEY_NOT_FOUND", "api key not found")
 	ErrGroupNotAllowed    = infraerrors.Forbidden("GROUP_NOT_ALLOWED", "user is not allowed to bind this group")
-	ErrApiKeyExists       = infraerrors.Conflict("API_KEY_EXISTS", "api key already exists")
-	ErrApiKeyTooShort     = infraerrors.BadRequest("API_KEY_TOO_SHORT", "api key must be at least 16 characters")
-	ErrApiKeyInvalidChars = infraerrors.BadRequest("API_KEY_INVALID_CHARS", "api key can only contain letters, numbers, underscores, and hyphens")
-	ErrApiKeyRateLimited  = infraerrors.TooManyRequests("API_KEY_RATE_LIMITED", "too many failed attempts, please try again later")
+	ErrAPIKeyExists       = infraerrors.Conflict("API_KEY_EXISTS", "api key already exists")
+	ErrAPIKeyTooShort     = infraerrors.BadRequest("API_KEY_TOO_SHORT", "api key must be at least 16 characters")
+	ErrAPIKeyInvalidChars = infraerrors.BadRequest("API_KEY_INVALID_CHARS", "api key can only contain letters, numbers, underscores, and hyphens")
+	ErrAPIKeyRateLimited  = infraerrors.TooManyRequests("API_KEY_RATE_LIMITED", "too many failed attempts, please try again later")
 )
 
 const (
 	apiKeyMaxErrorsPerHour = 20
 )
 
-type ApiKeyRepository interface {
-	Create(ctx context.Context, key *ApiKey) error
-	GetByID(ctx context.Context, id int64) (*ApiKey, error)
+type APIKeyRepository interface {
+	Create(ctx context.Context, key *APIKey) error
+	GetByID(ctx context.Context, id int64) (*APIKey, error)
 	// GetOwnerID 仅获取 API Key 的所有者 ID，用于删除前的轻量级权限验证
 	GetOwnerID(ctx context.Context, id int64) (int64, error)
-	GetByKey(ctx context.Context, key string) (*ApiKey, error)
-	Update(ctx context.Context, key *ApiKey) error
+	GetByKey(ctx context.Context, key string) (*APIKey, error)
+	Update(ctx context.Context, key *APIKey) error
 	Delete(ctx context.Context, id int64) error
 
-	ListByUserID(ctx context.Context, userID int64, params pagination.PaginationParams) ([]ApiKey, *pagination.PaginationResult, error)
+	ListByUserID(ctx context.Context, userID int64, params pagination.PaginationParams) ([]APIKey, *pagination.PaginationResult, error)
 	VerifyOwnership(ctx context.Context, userID int64, apiKeyIDs []int64) ([]int64, error)
 	CountByUserID(ctx context.Context, userID int64) (int64, error)
 	ExistsByKey(ctx context.Context, key string) (bool, error)
-	ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]ApiKey, *pagination.PaginationResult, error)
-	SearchApiKeys(ctx context.Context, userID int64, keyword string, limit int) ([]ApiKey, error)
+	ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]APIKey, *pagination.PaginationResult, error)
+	SearchAPIKeys(ctx context.Context, userID int64, keyword string, limit int) ([]APIKey, error)
 	ClearGroupIDByGroupID(ctx context.Context, groupID int64) (int64, error)
 	CountByGroupID(ctx context.Context, groupID int64) (int64, error)
 }
 
-// ApiKeyCache defines cache operations for API key service
-type ApiKeyCache interface {
+// APIKeyCache defines cache operations for API key service
+type APIKeyCache interface {
 	GetCreateAttemptCount(ctx context.Context, userID int64) (int, error)
 	IncrementCreateAttemptCount(ctx context.Context, userID int64) error
 	DeleteCreateAttemptCount(ctx context.Context, userID int64) error
@@ -55,40 +55,40 @@ type ApiKeyCache interface {
 	SetDailyUsageExpiry(ctx context.Context, apiKey string, ttl time.Duration) error
 }
 
-// CreateApiKeyRequest 创建API Key请求
-type CreateApiKeyRequest struct {
+// CreateAPIKeyRequest 创建API Key请求
+type CreateAPIKeyRequest struct {
 	Name      string  `json:"name"`
 	GroupID   *int64  `json:"group_id"`
 	CustomKey *string `json:"custom_key"` // 可选的自定义key
 }
 
-// UpdateApiKeyRequest 更新API Key请求
-type UpdateApiKeyRequest struct {
+// UpdateAPIKeyRequest 更新API Key请求
+type UpdateAPIKeyRequest struct {
 	Name    *string `json:"name"`
 	GroupID *int64  `json:"group_id"`
 	Status  *string `json:"status"`
 }
 
-// ApiKeyService API Key服务
-type ApiKeyService struct {
-	apiKeyRepo  ApiKeyRepository
+// APIKeyService API Key服务
+type APIKeyService struct {
+	apiKeyRepo  APIKeyRepository
 	userRepo    UserRepository
 	groupRepo   GroupRepository
 	userSubRepo UserSubscriptionRepository
-	cache       ApiKeyCache
+	cache       APIKeyCache
 	cfg         *config.Config
 }
 
-// NewApiKeyService 创建API Key服务实例
-func NewApiKeyService(
-	apiKeyRepo ApiKeyRepository,
+// NewAPIKeyService 创建API Key服务实例
+func NewAPIKeyService(
+	apiKeyRepo APIKeyRepository,
 	userRepo UserRepository,
 	groupRepo GroupRepository,
 	userSubRepo UserSubscriptionRepository,
-	cache ApiKeyCache,
+	cache APIKeyCache,
 	cfg *config.Config,
-) *ApiKeyService {
-	return &ApiKeyService{
+) *APIKeyService {
+	return &APIKeyService{
 		apiKeyRepo:  apiKeyRepo,
 		userRepo:    userRepo,
 		groupRepo:   groupRepo,
@@ -99,7 +99,7 @@ func NewApiKeyService(
 }
 
 // GenerateKey 生成随机API Key
-func (s *ApiKeyService) GenerateKey() (string, error) {
+func (s *APIKeyService) GenerateKey() (string, error) {
 	// 生成32字节随机数据
 	bytes := make([]byte, 32)
 	if _, err := rand.Read(bytes); err != nil {
@@ -107,7 +107,7 @@ func (s *ApiKeyService) GenerateKey() (string, error) {
 	}
 
 	// 转换为十六进制字符串并添加前缀
-	prefix := s.cfg.Default.ApiKeyPrefix
+	prefix := s.cfg.Default.APIKeyPrefix
 	if prefix == "" {
 		prefix = "sk-"
 	}
@@ -117,10 +117,10 @@ func (s *ApiKeyService) GenerateKey() (string, error) {
 }
 
 // ValidateCustomKey 验证自定义API Key格式
-func (s *ApiKeyService) ValidateCustomKey(key string) error {
+func (s *APIKeyService) ValidateCustomKey(key string) error {
 	// 检查长度
 	if len(key) < 16 {
-		return ErrApiKeyTooShort
+		return ErrAPIKeyTooShort
 	}
 
 	// 检查字符：只允许字母、数字、下划线、连字符
@@ -131,14 +131,14 @@ func (s *ApiKeyService) ValidateCustomKey(key string) error {
 			c == '_' || c == '-' {
 			continue
 		}
-		return ErrApiKeyInvalidChars
+		return ErrAPIKeyInvalidChars
 	}
 
 	return nil
 }
 
-// checkApiKeyRateLimit 检查用户创建自定义Key的错误次数是否超限
-func (s *ApiKeyService) checkApiKeyRateLimit(ctx context.Context, userID int64) error {
+// checkAPIKeyRateLimit 检查用户创建自定义Key的错误次数是否超限
+func (s *APIKeyService) checkAPIKeyRateLimit(ctx context.Context, userID int64) error {
 	if s.cache == nil {
 		return nil
 	}
@@ -150,14 +150,14 @@ func (s *ApiKeyService) checkApiKeyRateLimit(ctx context.Context, userID int64)
 	}
 
 	if count >= apiKeyMaxErrorsPerHour {
-		return ErrApiKeyRateLimited
+		return ErrAPIKeyRateLimited
 	}
 
 	return nil
 }
 
-// incrementApiKeyErrorCount 增加用户创建自定义Key的错误计数
-func (s *ApiKeyService) incrementApiKeyErrorCount(ctx context.Context, userID int64) {
+// incrementAPIKeyErrorCount 增加用户创建自定义Key的错误计数
+func (s *APIKeyService) incrementAPIKeyErrorCount(ctx context.Context, userID int64) {
 	if s.cache == nil {
 		return
 	}
@@ -168,7 +168,7 @@ func (s *ApiKeyService) incrementApiKeyErrorCount(ctx context.Context, userID in
 // canUserBindGroup 检查用户是否可以绑定指定分组
 // 对于订阅类型分组：检查用户是否有有效订阅
 // 对于标准类型分组：使用原有的 AllowedGroups 和 IsExclusive 逻辑
-func (s *ApiKeyService) canUserBindGroup(ctx context.Context, user *User, group *Group) bool {
+func (s *APIKeyService) canUserBindGroup(ctx context.Context, user *User, group *Group) bool {
 	// 订阅类型分组：需要有效订阅
 	if group.IsSubscriptionType() {
 		_, err := s.userSubRepo.GetActiveByUserIDAndGroupID(ctx, user.ID, group.ID)
@@ -179,7 +179,7 @@ func (s *ApiKeyService) canUserBindGroup(ctx context.Context, user *User, group
 }
 
 // Create 创建API Key
-func (s *ApiKeyService) Create(ctx context.Context, userID int64, req CreateApiKeyRequest) (*ApiKey, error) {
+func (s *APIKeyService) Create(ctx context.Context, userID int64, req CreateAPIKeyRequest) (*APIKey, error) {
 	// 验证用户存在
 	user, err := s.userRepo.GetByID(ctx, userID)
 	if err != nil {
@@ -204,7 +204,7 @@ func (s *ApiKeyService) Create(ctx context.Context, userID int64, req CreateApiK
 	// 判断是否使用自定义Key
 	if req.CustomKey != nil && *req.CustomKey != "" {
 		// 检查限流（仅对自定义key进行限流）
-		if err := s.checkApiKeyRateLimit(ctx, userID); err != nil {
+		if err := s.checkAPIKeyRateLimit(ctx, userID); err != nil {
 			return nil, err
 		}
 
@@ -220,8 +220,8 @@ func (s *ApiKeyService) Create(ctx context.Context, userID int64, req CreateApiK
 		}
 		if exists {
 			// Key已存在，增加错误计数
-			s.incrementApiKeyErrorCount(ctx, userID)
-			return nil, ErrApiKeyExists
+			s.incrementAPIKeyErrorCount(ctx, userID)
+			return nil, ErrAPIKeyExists
 		}
 
 		key = *req.CustomKey
@@ -235,7 +235,7 @@ func (s *ApiKeyService) Create(ctx context.Context, userID int64, req CreateApiK
 	}
 
 	// 创建API Key记录
-	apiKey := &ApiKey{
+	apiKey := &APIKey{
 		UserID:  userID,
 		Key:     key,
 		Name:    req.Name,
@@ -251,7 +251,7 @@ func (s *ApiKeyService) Create(ctx context.Context, userID int64, req CreateApiK
 }
 
 // List 获取用户的API Key列表
-func (s *ApiKeyService) List(ctx context.Context, userID int64, params pagination.PaginationParams) ([]ApiKey, *pagination.PaginationResult, error) {
+func (s *APIKeyService) List(ctx context.Context, userID int64, params pagination.PaginationParams) ([]APIKey, *pagination.PaginationResult, error) {
 	keys, pagination, err := s.apiKeyRepo.ListByUserID(ctx, userID, params)
 	if err != nil {
 		return nil, nil, fmt.Errorf("list api keys: %w", err)
@@ -259,7 +259,7 @@ func (s *ApiKeyService) List(ctx context.Context, userID int64, params paginatio
 	return keys, pagination, nil
 }
 
-func (s *ApiKeyService) VerifyOwnership(ctx context.Context, userID int64, apiKeyIDs []int64) ([]int64, error) {
+func (s *APIKeyService) VerifyOwnership(ctx context.Context, userID int64, apiKeyIDs []int64) ([]int64, error) {
 	if len(apiKeyIDs) == 0 {
 		return []int64{}, nil
 	}
@@ -272,7 +272,7 @@ func (s *ApiKeyService) VerifyOwnership(ctx context.Context, userID int64, apiKe
 }
 
 // GetByID 根据ID获取API Key
-func (s *ApiKeyService) GetByID(ctx context.Context, id int64) (*ApiKey, error) {
+func (s *APIKeyService) GetByID(ctx context.Context, id int64) (*APIKey, error) {
 	apiKey, err := s.apiKeyRepo.GetByID(ctx, id)
 	if err != nil {
 		return nil, fmt.Errorf("get api key: %w", err)
@@ -281,7 +281,7 @@ func (s *ApiKeyService) GetByID(ctx context.Context, id int64) (*ApiKey, error)
 }
 
 // GetByKey 根据Key字符串获取API Key（用于认证）
-func (s *ApiKeyService) GetByKey(ctx context.Context, key string) (*ApiKey, error) {
+func (s *APIKeyService) GetByKey(ctx context.Context, key string) (*APIKey, error) {
 	// 尝试从Redis缓存获取
 	cacheKey := fmt.Sprintf("apikey:%s", key)
 
@@ -301,7 +301,7 @@ func (s *ApiKeyService) GetByKey(ctx context.Context, key string) (*ApiKey, erro
 }
 
 // Update 更新API Key
-func (s *ApiKeyService) Update(ctx context.Context, id int64, userID int64, req UpdateApiKeyRequest) (*ApiKey, error) {
+func (s *APIKeyService) Update(ctx context.Context, id int64, userID int64, req UpdateAPIKeyRequest) (*APIKey, error) {
 	apiKey, err := s.apiKeyRepo.GetByID(ctx, id)
 	if err != nil {
 		return nil, fmt.Errorf("get api key: %w", err)
@@ -353,8 +353,8 @@ func (s *ApiKeyService) Update(ctx context.Context, id int64, userID int64, req
 
 // Delete 删除API Key
 // 优化：使用 GetOwnerID 替代 GetByID 进行权限验证，
-// 避免加载完整 ApiKey 对象及其关联数据（User、Group），提升删除操作的性能
-func (s *ApiKeyService) Delete(ctx context.Context, id int64, userID int64) error {
+// 避免加载完整 APIKey 对象及其关联数据（User、Group），提升删除操作的性能
+func (s *APIKeyService) Delete(ctx context.Context, id int64, userID int64) error {
 	// 仅获取所有者 ID 用于权限验证，而非加载完整对象
 	ownerID, err := s.apiKeyRepo.GetOwnerID(ctx, id)
 	if err != nil {
@@ -379,7 +379,7 @@ func (s *ApiKeyService) Delete(ctx context.Context, id int64, userID int64) erro
 }
 
 // ValidateKey 验证API Key是否有效（用于认证中间件）
-func (s *ApiKeyService) ValidateKey(ctx context.Context, key string) (*ApiKey, *User, error) {
+func (s *APIKeyService) ValidateKey(ctx context.Context, key string) (*APIKey, *User, error) {
 	// 获取API Key
 	apiKey, err := s.GetByKey(ctx, key)
 	if err != nil {
@@ -406,7 +406,7 @@ func (s *ApiKeyService) ValidateKey(ctx context.Context, key string) (*ApiKey, *
 }
 
 // IncrementUsage 增加API Key使用次数（可选：用于统计）
-func (s *ApiKeyService) IncrementUsage(ctx context.Context, keyID int64) error {
+func (s *APIKeyService) IncrementUsage(ctx context.Context, keyID int64) error {
 	// 使用Redis计数器
 	if s.cache != nil {
 		cacheKey := fmt.Sprintf("apikey:usage:%d:%s", keyID, timezone.Now().Format("2006-01-02"))
@@ -423,7 +423,7 @@ func (s *ApiKeyService) IncrementUsage(ctx context.Context, keyID int64) error {
 // 返回用户可以选择的分组：
 // - 标准类型分组：公开的（非专属）或用户被明确允许的
 // - 订阅类型分组：用户有有效订阅的
-func (s *ApiKeyService) GetAvailableGroups(ctx context.Context, userID int64) ([]Group, error) {
+func (s *APIKeyService) GetAvailableGroups(ctx context.Context, userID int64) ([]Group, error) {
 	// 获取用户信息
 	user, err := s.userRepo.GetByID(ctx, userID)
 	if err != nil {
@@ -460,7 +460,7 @@ func (s *ApiKeyService) GetAvailableGroups(ctx context.Context, userID int64) ([
 }
 
 // canUserBindGroupInternal 内部方法，检查用户是否可以绑定分组（使用预加载的订阅数据）
-func (s *ApiKeyService) canUserBindGroupInternal(user *User, group *Group, subscribedGroupIDs map[int64]bool) bool {
+func (s *APIKeyService) canUserBindGroupInternal(user *User, group *Group, subscribedGroupIDs map[int64]bool) bool {
 	// 订阅类型分组：需要有效订阅
 	if group.IsSubscriptionType() {
 		return subscribedGroupIDs[group.ID]
@@ -469,8 +469,8 @@ func (s *ApiKeyService) canUserBindGroupInternal(user *User, group *Group, subsc
 	return user.CanBindGroup(group.ID, group.IsExclusive)
 }
 
-func (s *ApiKeyService) SearchApiKeys(ctx context.Context, userID int64, keyword string, limit int) ([]ApiKey, error) {
-	keys, err := s.apiKeyRepo.SearchApiKeys(ctx, userID, keyword, limit)
+func (s *APIKeyService) SearchAPIKeys(ctx context.Context, userID int64, keyword string, limit int) ([]APIKey, error) {
+	keys, err := s.apiKeyRepo.SearchAPIKeys(ctx, userID, keyword, limit)
 	if err != nil {
 		return nil, fmt.Errorf("search api keys: %w", err)
 	}

backend/internal/service/api_key_service_delete_test.go

@@ -1,7 +1,7 @@
 //go:build unit
 
 // API Key 服务删除方法的单元测试
-// 测试 ApiKeyService.Delete 方法在各种场景下的行为，
+// 测试 APIKeyService.Delete 方法在各种场景下的行为，
 // 包括权限验证、缓存清理和错误处理
 
 package service
@@ -16,12 +16,12 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-// apiKeyRepoStub 是 ApiKeyRepository 接口的测试桩实现。
-// 用于隔离测试 ApiKeyService.Delete 方法，避免依赖真实数据库。
+// apiKeyRepoStub 是 APIKeyRepository 接口的测试桩实现。
+// 用于隔离测试 APIKeyService.Delete 方法，避免依赖真实数据库。
 //
 // 设计说明：
 //   - ownerID: 模拟 GetOwnerID 返回的所有者 ID
-//   - ownerErr: 模拟 GetOwnerID 返回的错误（如 ErrApiKeyNotFound）
+//   - ownerErr: 模拟 GetOwnerID 返回的错误（如 ErrAPIKeyNotFound）
 //   - deleteErr: 模拟 Delete 返回的错误
 //   - deletedIDs: 记录被调用删除的 API Key ID，用于断言验证
 type apiKeyRepoStub struct {
@@ -33,11 +33,11 @@ type apiKeyRepoStub struct {
 
 // 以下方法在本测试中不应被调用，使用 panic 确保测试失败时能快速定位问题
 
-func (s *apiKeyRepoStub) Create(ctx context.Context, key *ApiKey) error {
+func (s *apiKeyRepoStub) Create(ctx context.Context, key *APIKey) error {
 	panic("unexpected Create call")
 }
 
-func (s *apiKeyRepoStub) GetByID(ctx context.Context, id int64) (*ApiKey, error) {
+func (s *apiKeyRepoStub) GetByID(ctx context.Context, id int64) (*APIKey, error) {
 	panic("unexpected GetByID call")
 }
 
@@ -47,11 +47,11 @@ func (s *apiKeyRepoStub) GetOwnerID(ctx context.Context, id int64) (int64, error
 	return s.ownerID, s.ownerErr
 }
 
-func (s *apiKeyRepoStub) GetByKey(ctx context.Context, key string) (*ApiKey, error) {
+func (s *apiKeyRepoStub) GetByKey(ctx context.Context, key string) (*APIKey, error) {
 	panic("unexpected GetByKey call")
 }
 
-func (s *apiKeyRepoStub) Update(ctx context.Context, key *ApiKey) error {
+func (s *apiKeyRepoStub) Update(ctx context.Context, key *APIKey) error {
 	panic("unexpected Update call")
 }
 
@@ -64,7 +64,7 @@ func (s *apiKeyRepoStub) Delete(ctx context.Context, id int64) error {
 
 // 以下是接口要求实现但本测试不关心的方法
 
-func (s *apiKeyRepoStub) ListByUserID(ctx context.Context, userID int64, params pagination.PaginationParams) ([]ApiKey, *pagination.PaginationResult, error) {
+func (s *apiKeyRepoStub) ListByUserID(ctx context.Context, userID int64, params pagination.PaginationParams) ([]APIKey, *pagination.PaginationResult, error) {
 	panic("unexpected ListByUserID call")
 }
 
@@ -80,12 +80,12 @@ func (s *apiKeyRepoStub) ExistsByKey(ctx context.Context, key string) (bool, err
 	panic("unexpected ExistsByKey call")
 }
 
-func (s *apiKeyRepoStub) ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]ApiKey, *pagination.PaginationResult, error) {
+func (s *apiKeyRepoStub) ListByGroupID(ctx context.Context, groupID int64, params pagination.PaginationParams) ([]APIKey, *pagination.PaginationResult, error) {
 	panic("unexpected ListByGroupID call")
 }
 
-func (s *apiKeyRepoStub) SearchApiKeys(ctx context.Context, userID int64, keyword string, limit int) ([]ApiKey, error) {
-	panic("unexpected SearchApiKeys call")
+func (s *apiKeyRepoStub) SearchAPIKeys(ctx context.Context, userID int64, keyword string, limit int) ([]APIKey, error) {
+	panic("unexpected SearchAPIKeys call")
 }
 
 func (s *apiKeyRepoStub) ClearGroupIDByGroupID(ctx context.Context, groupID int64) (int64, error) {
@@ -96,7 +96,7 @@ func (s *apiKeyRepoStub) CountByGroupID(ctx context.Context, groupID int64) (int
 	panic("unexpected CountByGroupID call")
 }
 
-// apiKeyCacheStub 是 ApiKeyCache 接口的测试桩实现。
+// apiKeyCacheStub 是 APIKeyCache 接口的测试桩实现。
 // 用于验证删除操作时缓存清理逻辑是否被正确调用。
 //
 // 设计说明：
@@ -142,7 +142,7 @@ func (s *apiKeyCacheStub) SetDailyUsageExpiry(ctx context.Context, apiKey string
 func TestApiKeyService_Delete_OwnerMismatch(t *testing.T) {
 	repo := &apiKeyRepoStub{ownerID: 1}
 	cache := &apiKeyCacheStub{}
-	svc := &ApiKeyService{apiKeyRepo: repo, cache: cache}
+	svc := &APIKeyService{apiKeyRepo: repo, cache: cache}
 
 	err := svc.Delete(context.Background(), 10, 2) // API Key ID=10, 调用者 userID=2
 	require.ErrorIs(t, err, ErrInsufficientPerms)
@@ -160,7 +160,7 @@ func TestApiKeyService_Delete_OwnerMismatch(t *testing.T) {
 func TestApiKeyService_Delete_Success(t *testing.T) {
 	repo := &apiKeyRepoStub{ownerID: 7}
 	cache := &apiKeyCacheStub{}
-	svc := &ApiKeyService{apiKeyRepo: repo, cache: cache}
+	svc := &APIKeyService{apiKeyRepo: repo, cache: cache}
 
 	err := svc.Delete(context.Background(), 42, 7) // API Key ID=42, 调用者 userID=7
 	require.NoError(t, err)
@@ -170,17 +170,17 @@ func TestApiKeyService_Delete_Success(t *testing.T) {
 
 // TestApiKeyService_Delete_NotFound 测试删除不存在的 API Key 时返回正确的错误。
 // 预期行为：
-//   - GetOwnerID 返回 ErrApiKeyNotFound 错误
-//   - 返回 ErrApiKeyNotFound 错误（被 fmt.Errorf 包装）
+//   - GetOwnerID 返回 ErrAPIKeyNotFound 错误
+//   - 返回 ErrAPIKeyNotFound 错误（被 fmt.Errorf 包装）
 //   - Delete 方法不被调用
 //   - 缓存不被清除
 func TestApiKeyService_Delete_NotFound(t *testing.T) {
-	repo := &apiKeyRepoStub{ownerErr: ErrApiKeyNotFound}
+	repo := &apiKeyRepoStub{ownerErr: ErrAPIKeyNotFound}
 	cache := &apiKeyCacheStub{}
-	svc := &ApiKeyService{apiKeyRepo: repo, cache: cache}
+	svc := &APIKeyService{apiKeyRepo: repo, cache: cache}
 
 	err := svc.Delete(context.Background(), 99, 1)
-	require.ErrorIs(t, err, ErrApiKeyNotFound)
+	require.ErrorIs(t, err, ErrAPIKeyNotFound)
 	require.Empty(t, repo.deletedIDs)
 	require.Empty(t, cache.invalidated)
 }
@@ -198,7 +198,7 @@ func TestApiKeyService_Delete_DeleteFails(t *testing.T) {
 		deleteErr: errors.New("delete failed"),
 	}
 	cache := &apiKeyCacheStub{}
-	svc := &ApiKeyService{apiKeyRepo: repo, cache: cache}
+	svc := &APIKeyService{apiKeyRepo: repo, cache: cache}
 
 	err := svc.Delete(context.Background(), 3, 3) // API Key ID=3, 调用者 userID=3
 	require.Error(t, err)

backend/internal/service/billing_cache_service.go

@@ -445,7 +445,7 @@ func (s *BillingCacheService) InvalidateSubscription(ctx context.Context, userID
 // CheckBillingEligibility 检查用户是否有资格发起请求
 // 余额模式：检查缓存余额 > 0
 // 订阅模式：检查缓存用量未超过限额（Group限额从参数传入）
-func (s *BillingCacheService) CheckBillingEligibility(ctx context.Context, user *User, apiKey *ApiKey, group *Group, subscription *UserSubscription) error {
+func (s *BillingCacheService) CheckBillingEligibility(ctx context.Context, user *User, apiKey *APIKey, group *Group, subscription *UserSubscription) error {
 	// 简易模式：跳过所有计费检查
 	if s.cfg.RunMode == config.RunModeSimple {
 		return nil

backend/internal/service/crs_sync_service.go

@@ -430,7 +430,7 @@ func (s *CRSSyncService) SyncFromCRS(ctx context.Context, input SyncFromCRSInput
 			account := &Account{
 				Name:        defaultName(src.Name, src.ID),
 				Platform:    PlatformAnthropic,
-				Type:        AccountTypeApiKey,
+				Type:        AccountTypeAPIKey,
 				Credentials: credentials,
 				Extra:       extra,
 				ProxyID:     proxyID,
@@ -455,7 +455,7 @@ func (s *CRSSyncService) SyncFromCRS(ctx context.Context, input SyncFromCRSInput
 		existing.Extra = mergeMap(existing.Extra, extra)
 		existing.Name = defaultName(src.Name, src.ID)
 		existing.Platform = PlatformAnthropic
-		existing.Type = AccountTypeApiKey
+		existing.Type = AccountTypeAPIKey
 		existing.Credentials = mergeMap(existing.Credentials, credentials)
 		if proxyID != nil {
 			existing.ProxyID = proxyID
@@ -674,7 +674,7 @@ func (s *CRSSyncService) SyncFromCRS(ctx context.Context, input SyncFromCRSInput
 			account := &Account{
 				Name:        defaultName(src.Name, src.ID),
 				Platform:    PlatformOpenAI,
-				Type:        AccountTypeApiKey,
+				Type:        AccountTypeAPIKey,
 				Credentials: credentials,
 				Extra:       extra,
 				ProxyID:     proxyID,
@@ -699,7 +699,7 @@ func (s *CRSSyncService) SyncFromCRS(ctx context.Context, input SyncFromCRSInput
 		existing.Extra = mergeMap(existing.Extra, extra)
 		existing.Name = defaultName(src.Name, src.ID)
 		existing.Platform = PlatformOpenAI
-		existing.Type = AccountTypeApiKey
+		existing.Type = AccountTypeAPIKey
 		existing.Credentials = mergeMap(existing.Credentials, credentials)
 		if proxyID != nil {
 			existing.ProxyID = proxyID
@@ -893,7 +893,7 @@ func (s *CRSSyncService) SyncFromCRS(ctx context.Context, input SyncFromCRSInput
 			account := &Account{
 				Name:        defaultName(src.Name, src.ID),
 				Platform:    PlatformGemini,
-				Type:        AccountTypeApiKey,
+				Type:        AccountTypeAPIKey,
 				Credentials: credentials,
 				Extra:       extra,
 				ProxyID:     proxyID,
@@ -918,7 +918,7 @@ func (s *CRSSyncService) SyncFromCRS(ctx context.Context, input SyncFromCRSInput
 		existing.Extra = mergeMap(existing.Extra, extra)
 		existing.Name = defaultName(src.Name, src.ID)
 		existing.Platform = PlatformGemini
-		existing.Type = AccountTypeApiKey
+		existing.Type = AccountTypeAPIKey
 		existing.Credentials = mergeMap(existing.Credentials, credentials)
 		if proxyID != nil {
 			existing.ProxyID = proxyID

backend/internal/service/dashboard_service.go

@@ -43,8 +43,8 @@ func (s *DashboardService) GetModelStatsWithFilters(ctx context.Context, startTi
 	return stats, nil
 }
 
-func (s *DashboardService) GetApiKeyUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) ([]usagestats.ApiKeyUsageTrendPoint, error) {
-	trend, err := s.usageRepo.GetApiKeyUsageTrend(ctx, startTime, endTime, granularity, limit)
+func (s *DashboardService) GetAPIKeyUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) ([]usagestats.APIKeyUsageTrendPoint, error) {
+	trend, err := s.usageRepo.GetAPIKeyUsageTrend(ctx, startTime, endTime, granularity, limit)
 	if err != nil {
 		return nil, fmt.Errorf("get api key usage trend: %w", err)
 	}
@@ -67,8 +67,8 @@ func (s *DashboardService) GetBatchUserUsageStats(ctx context.Context, userIDs [
 	return stats, nil
 }
 
-func (s *DashboardService) GetBatchApiKeyUsageStats(ctx context.Context, apiKeyIDs []int64) (map[int64]*usagestats.BatchApiKeyUsageStats, error) {
-	stats, err := s.usageRepo.GetBatchApiKeyUsageStats(ctx, apiKeyIDs)
+func (s *DashboardService) GetBatchAPIKeyUsageStats(ctx context.Context, apiKeyIDs []int64) (map[int64]*usagestats.BatchAPIKeyUsageStats, error) {
+	stats, err := s.usageRepo.GetBatchAPIKeyUsageStats(ctx, apiKeyIDs)
 	if err != nil {
 		return nil, fmt.Errorf("get batch api key usage stats: %w", err)
 	}

backend/internal/service/domain_constants.go

@@ -28,7 +28,7 @@ const (
 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
+	AccountTypeAPIKey     = "apikey"      // API Key类型账号
 )
 
 // Redeem type constants
@@ -64,13 +64,13 @@ const (
 	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
+	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
@@ -81,16 +81,16 @@ const (
 	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）
+	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
+	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）
+	SettingKeyAdminAPIKey = "admin_api_key" // 全局管理员 API Key（用于外部系统集成）
 
 	// Gemini 配额策略（JSON）
 	SettingKeyGeminiQuotaPolicy = "gemini_quota_policy"
@@ -103,5 +103,5 @@ const (
 	SettingKeyFallbackModelAntigravity = "fallback_model_antigravity"
 )
 
-// Admin API Key prefix (distinct from user "sk-" keys)
-const AdminApiKeyPrefix = "admin-"
+// AdminAPIKeyPrefix is the prefix for admin API keys (distinct from user "sk-" keys).
+const AdminAPIKeyPrefix = "admin-"

backend/internal/service/email_service.go

@@ -40,8 +40,8 @@ const (
 	maxVerifyCodeAttempts = 5
 )
 
-// SmtpConfig SMTP配置
-type SmtpConfig struct {
+// SMTPConfig SMTP配置
+type SMTPConfig struct {
 	Host     string
 	Port     int
 	Username string
@@ -65,16 +65,16 @@ func NewEmailService(settingRepo SettingRepository, cache EmailCache) *EmailServ
 	}
 }
 
-// GetSmtpConfig 从数据库获取SMTP配置
-func (s *EmailService) GetSmtpConfig(ctx context.Context) (*SmtpConfig, error) {
+// GetSMTPConfig 从数据库获取SMTP配置
+func (s *EmailService) GetSMTPConfig(ctx context.Context) (*SMTPConfig, error) {
 	keys := []string{
-		SettingKeySmtpHost,
-		SettingKeySmtpPort,
-		SettingKeySmtpUsername,
-		SettingKeySmtpPassword,
-		SettingKeySmtpFrom,
-		SettingKeySmtpFromName,
-		SettingKeySmtpUseTLS,
+		SettingKeySMTPHost,
+		SettingKeySMTPPort,
+		SettingKeySMTPUsername,
+		SettingKeySMTPPassword,
+		SettingKeySMTPFrom,
+		SettingKeySMTPFromName,
+		SettingKeySMTPUseTLS,
 	}
 
 	settings, err := s.settingRepo.GetMultiple(ctx, keys)
@@ -82,34 +82,34 @@ func (s *EmailService) GetSmtpConfig(ctx context.Context) (*SmtpConfig, error) {
 		return nil, fmt.Errorf("get smtp settings: %w", err)
 	}
 
-	host := settings[SettingKeySmtpHost]
+	host := settings[SettingKeySMTPHost]
 	if host == "" {
 		return nil, ErrEmailNotConfigured
 	}
 
 	port := 587 // 默认端口
-	if portStr := settings[SettingKeySmtpPort]; portStr != "" {
+	if portStr := settings[SettingKeySMTPPort]; portStr != "" {
 		if p, err := strconv.Atoi(portStr); err == nil {
 			port = p
 		}
 	}
 
-	useTLS := settings[SettingKeySmtpUseTLS] == "true"
+	useTLS := settings[SettingKeySMTPUseTLS] == "true"
 
-	return &SmtpConfig{
+	return &SMTPConfig{
 		Host:     host,
 		Port:     port,
-		Username: settings[SettingKeySmtpUsername],
-		Password: settings[SettingKeySmtpPassword],
-		From:     settings[SettingKeySmtpFrom],
-		FromName: settings[SettingKeySmtpFromName],
+		Username: settings[SettingKeySMTPUsername],
+		Password: settings[SettingKeySMTPPassword],
+		From:     settings[SettingKeySMTPFrom],
+		FromName: settings[SettingKeySMTPFromName],
 		UseTLS:   useTLS,
 	}, nil
 }
 
 // SendEmail 发送邮件（使用数据库中保存的配置）
 func (s *EmailService) SendEmail(ctx context.Context, to, subject, body string) error {
-	config, err := s.GetSmtpConfig(ctx)
+	config, err := s.GetSMTPConfig(ctx)
 	if err != nil {
 		return err
 	}
@@ -117,7 +117,7 @@ func (s *EmailService) SendEmail(ctx context.Context, to, subject, body string)
 }
 
 // SendEmailWithConfig 使用指定配置发送邮件
-func (s *EmailService) SendEmailWithConfig(config *SmtpConfig, to, subject, body string) error {
+func (s *EmailService) SendEmailWithConfig(config *SMTPConfig, to, subject, body string) error {
 	from := config.From
 	if config.FromName != "" {
 		from = fmt.Sprintf("%s <%s>", config.FromName, config.From)
@@ -306,8 +306,8 @@ func (s *EmailService) buildVerifyCodeEmailBody(code, siteName string) string {
 `, siteName, code)
 }
 
-// TestSmtpConnectionWithConfig 使用指定配置测试SMTP连接
-func (s *EmailService) TestSmtpConnectionWithConfig(config *SmtpConfig) error {
+// TestSMTPConnectionWithConfig 使用指定配置测试SMTP连接
+func (s *EmailService) TestSMTPConnectionWithConfig(config *SMTPConfig) error {
 	addr := fmt.Sprintf("%s:%d", config.Host, config.Port)
 
 	if config.UseTLS {

backend/internal/service/gateway_multiplatform_test.go

@@ -282,7 +282,7 @@ func TestGatewayService_SelectAccountForModelWithPlatform_GeminiOAuthPreference(
 
 	repo := &mockAccountRepoForPlatform{
 		accounts: []Account{
-			{ID: 1, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true, Type: AccountTypeApiKey},
+			{ID: 1, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true, Type: AccountTypeAPIKey},
 			{ID: 2, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true, Type: AccountTypeOAuth},
 		},
 		accountsByID: map[int64]*Account{},
@@ -623,7 +623,7 @@ func TestGatewayService_selectAccountWithMixedScheduling(t *testing.T) {
 	t.Run("混合调度-Gemini优先选择OAuth账户", func(t *testing.T) {
 		repo := &mockAccountRepoForPlatform{
 			accounts: []Account{
-				{ID: 1, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true, Type: AccountTypeApiKey},
+				{ID: 1, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true, Type: AccountTypeAPIKey},
 				{ID: 2, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true, Type: AccountTypeOAuth},
 			},
 			accountsByID: map[int64]*Account{},

backend/internal/service/gateway_service.go

@@ -907,7 +907,7 @@ func (s *GatewayService) GetAccessToken(ctx context.Context, account *Account) (
 	case AccountTypeOAuth, AccountTypeSetupToken:
 		// Both oauth and setup-token use OAuth token flow
 		return s.getOAuthToken(ctx, account)
-	case AccountTypeApiKey:
+	case AccountTypeAPIKey:
 		apiKey := account.GetCredential("api_key")
 		if apiKey == "" {
 			return "", "", errors.New("api_key not found in credentials")
@@ -1045,7 +1045,7 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *A
 
 	// 应用模型映射（仅对apikey类型账号）
 	originalModel := reqModel
-	if account.Type == AccountTypeApiKey {
+	if account.Type == AccountTypeAPIKey {
 		mappedModel := account.GetMappedModel(reqModel)
 		if mappedModel != reqModel {
 			// 替换请求体中的模型名
@@ -1223,7 +1223,7 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *A
 func (s *GatewayService) buildUpstreamRequest(ctx context.Context, c *gin.Context, account *Account, body []byte, token, tokenType, modelID string) (*http.Request, error) {
 	// 确定目标URL
 	targetURL := claudeAPIURL
-	if account.Type == AccountTypeApiKey {
+	if account.Type == AccountTypeAPIKey {
 		baseURL := account.GetBaseURL()
 		targetURL = baseURL + "/v1/messages"
 	}
@@ -1287,10 +1287,10 @@ func (s *GatewayService) buildUpstreamRequest(ctx context.Context, c *gin.Contex
 	// 处理anthropic-beta header（OAuth账号需要特殊处理）
 	if tokenType == "oauth" {
 		req.Header.Set("anthropic-beta", s.getBetaHeader(modelID, c.GetHeader("anthropic-beta")))
-	} else if s.cfg != nil && s.cfg.Gateway.InjectBetaForApiKey && req.Header.Get("anthropic-beta") == "" {
+	} else if s.cfg != nil && s.cfg.Gateway.InjectBetaForAPIKey && req.Header.Get("anthropic-beta") == "" {
 		// API-key：仅在请求显式使用 beta 特性且客户端未提供时，按需补齐（默认关闭）
 		if requestNeedsBetaFeatures(body) {
-			if beta := defaultApiKeyBetaHeader(body); beta != "" {
+			if beta := defaultAPIKeyBetaHeader(body); beta != "" {
 				req.Header.Set("anthropic-beta", beta)
 			}
 		}
@@ -1357,12 +1357,12 @@ func requestNeedsBetaFeatures(body []byte) bool {
 	return false
 }
 
-func defaultApiKeyBetaHeader(body []byte) string {
+func defaultAPIKeyBetaHeader(body []byte) string {
 	modelID := gjson.GetBytes(body, "model").String()
 	if strings.Contains(strings.ToLower(modelID), "haiku") {
-		return claude.ApiKeyHaikuBetaHeader
+		return claude.APIKeyHaikuBetaHeader
 	}
-	return claude.ApiKeyBetaHeader
+	return claude.APIKeyBetaHeader
 }
 
 func truncateForLog(b []byte, maxBytes int) string {
@@ -1780,7 +1780,7 @@ func (s *GatewayService) replaceModelInResponseBody(body []byte, fromModel, toMo
 // RecordUsageInput 记录使用量的输入参数
 type RecordUsageInput struct {
 	Result       *ForwardResult
-	ApiKey       *ApiKey
+	APIKey       *APIKey
 	User         *User
 	Account      *Account
 	Subscription *UserSubscription // 可选：订阅信息
@@ -1789,7 +1789,7 @@ type RecordUsageInput struct {
 // RecordUsage 记录使用量并扣费（或更新订阅用量）
 func (s *GatewayService) RecordUsage(ctx context.Context, input *RecordUsageInput) error {
 	result := input.Result
-	apiKey := input.ApiKey
+	apiKey := input.APIKey
 	user := input.User
 	account := input.Account
 	subscription := input.Subscription
@@ -1826,7 +1826,7 @@ func (s *GatewayService) RecordUsage(ctx context.Context, input *RecordUsageInpu
 	durationMs := int(result.Duration.Milliseconds())
 	usageLog := &UsageLog{
 		UserID:              user.ID,
-		ApiKeyID:            apiKey.ID,
+		APIKeyID:            apiKey.ID,
 		AccountID:           account.ID,
 		RequestID:           result.RequestID,
 		Model:               result.Model,
@@ -1914,7 +1914,7 @@ func (s *GatewayService) ForwardCountTokens(ctx context.Context, c *gin.Context,
 	}
 
 	// 应用模型映射（仅对 apikey 类型账号）
-	if account.Type == AccountTypeApiKey {
+	if account.Type == AccountTypeAPIKey {
 		if reqModel != "" {
 			mappedModel := account.GetMappedModel(reqModel)
 			if mappedModel != reqModel {
@@ -2018,7 +2018,7 @@ func (s *GatewayService) ForwardCountTokens(ctx context.Context, c *gin.Context,
 func (s *GatewayService) buildCountTokensRequest(ctx context.Context, c *gin.Context, account *Account, body []byte, token, tokenType, modelID string) (*http.Request, error) {
 	// 确定目标 URL
 	targetURL := claudeAPICountTokensURL
-	if account.Type == AccountTypeApiKey {
+	if account.Type == AccountTypeAPIKey {
 		baseURL := account.GetBaseURL()
 		targetURL = baseURL + "/v1/messages/count_tokens"
 	}
@@ -2077,10 +2077,10 @@ func (s *GatewayService) buildCountTokensRequest(ctx context.Context, c *gin.Con
 	// OAuth 账号：处理 anthropic-beta header
 	if tokenType == "oauth" {
 		req.Header.Set("anthropic-beta", s.getBetaHeader(modelID, c.GetHeader("anthropic-beta")))
-	} else if s.cfg != nil && s.cfg.Gateway.InjectBetaForApiKey && req.Header.Get("anthropic-beta") == "" {
+	} else if s.cfg != nil && s.cfg.Gateway.InjectBetaForAPIKey && req.Header.Get("anthropic-beta") == "" {
 		// API-key：与 messages 同步的按需 beta 注入（默认关闭）
 		if requestNeedsBetaFeatures(body) {
-			if beta := defaultApiKeyBetaHeader(body); beta != "" {
+			if beta := defaultAPIKeyBetaHeader(body); beta != "" {
 				req.Header.Set("anthropic-beta", beta)
 			}
 		}

backend/internal/service/gemini_messages_compat_service.go

@@ -273,7 +273,7 @@ func (s *GeminiMessagesCompatService) SelectAccountForAIStudioEndpoints(ctx cont
 			return 999
 		}
 		switch a.Type {
-		case AccountTypeApiKey:
+		case AccountTypeAPIKey:
 			if strings.TrimSpace(a.GetCredential("api_key")) != "" {
 				return 0
 			}
@@ -351,7 +351,7 @@ func (s *GeminiMessagesCompatService) Forward(ctx context.Context, c *gin.Contex
 
 	originalModel := req.Model
 	mappedModel := req.Model
-	if account.Type == AccountTypeApiKey {
+	if account.Type == AccountTypeAPIKey {
 		mappedModel = account.GetMappedModel(req.Model)
 	}
 
@@ -374,7 +374,7 @@ func (s *GeminiMessagesCompatService) Forward(ctx context.Context, c *gin.Contex
 	}
 
 	switch account.Type {
-	case AccountTypeApiKey:
+	case AccountTypeAPIKey:
 		buildReq = func(ctx context.Context) (*http.Request, string, error) {
 			apiKey := account.GetCredential("api_key")
 			if strings.TrimSpace(apiKey) == "" {
@@ -621,7 +621,7 @@ func (s *GeminiMessagesCompatService) ForwardNative(ctx context.Context, c *gin.
 	}
 
 	mappedModel := originalModel
-	if account.Type == AccountTypeApiKey {
+	if account.Type == AccountTypeAPIKey {
 		mappedModel = account.GetMappedModel(originalModel)
 	}
 
@@ -643,7 +643,7 @@ func (s *GeminiMessagesCompatService) ForwardNative(ctx context.Context, c *gin.
 	var buildReq func(ctx context.Context) (*http.Request, string, error)
 
 	switch account.Type {
-	case AccountTypeApiKey:
+	case AccountTypeAPIKey:
 		buildReq = func(ctx context.Context) (*http.Request, string, error) {
 			apiKey := account.GetCredential("api_key")
 			if strings.TrimSpace(apiKey) == "" {
@@ -1790,7 +1790,7 @@ func (s *GeminiMessagesCompatService) ForwardAIStudioGET(ctx context.Context, ac
 	}
 
 	switch account.Type {
-	case AccountTypeApiKey:
+	case AccountTypeAPIKey:
 		apiKey := strings.TrimSpace(account.GetCredential("api_key"))
 		if apiKey == "" {
 			return nil, errors.New("gemini api_key not configured")

backend/internal/service/gemini_multiplatform_test.go

@@ -281,7 +281,7 @@ func TestGeminiMessagesCompatService_SelectAccountForModelWithExclusions_OAuthPr
 
 	repo := &mockAccountRepoForGemini{
 		accounts: []Account{
-			{ID: 1, Platform: PlatformGemini, Type: AccountTypeApiKey, Priority: 1, Status: StatusActive, Schedulable: true, LastUsedAt: nil},
+			{ID: 1, Platform: PlatformGemini, Type: AccountTypeAPIKey, Priority: 1, Status: StatusActive, Schedulable: true, LastUsedAt: nil},
 			{ID: 2, Platform: PlatformGemini, Type: AccountTypeOAuth, Priority: 1, Status: StatusActive, Schedulable: true, LastUsedAt: nil},
 		},
 		accountsByID: map[int64]*Account{},

backend/internal/service/gemini_oauth_service.go

@@ -353,7 +353,7 @@ func inferGoogleOneTier(storageBytes int64) string {
 	return GeminiTierGoogleOneUnknown
 }
 
-// fetchGoogleOneTier fetches Google One tier from Drive API
+// FetchGoogleOneTier fetches Google One tier from Drive API.
 // Note: LoadCodeAssist API is NOT called for Google One accounts because:
 // 1. It's designed for GCP IAM (enterprise), not personal Google accounts
 // 2. Personal accounts will get 403/404 from cloudaicompanion.googleapis.com

backend/internal/service/openai_gateway_service.go

@@ -487,7 +487,7 @@ func (s *OpenAIGatewayService) GetAccessToken(ctx context.Context, account *Acco
 			return "", "", errors.New("access_token not found in credentials")
 		}
 		return accessToken, "oauth", nil
-	case AccountTypeApiKey:
+	case AccountTypeAPIKey:
 		apiKey := account.GetOpenAIApiKey()
 		if apiKey == "" {
 			return "", "", errors.New("api_key not found in credentials")
@@ -627,7 +627,7 @@ func (s *OpenAIGatewayService) buildUpstreamRequest(ctx context.Context, c *gin.
 	case AccountTypeOAuth:
 		// OAuth accounts use ChatGPT internal API
 		targetURL = chatgptCodexURL
-	case AccountTypeApiKey:
+	case AccountTypeAPIKey:
 		// API Key accounts use Platform API or custom base URL
 		baseURL := account.GetOpenAIBaseURL()
 		if baseURL != "" {
@@ -946,7 +946,7 @@ func (s *OpenAIGatewayService) replaceModelInResponseBody(body []byte, fromModel
 // OpenAIRecordUsageInput input for recording usage
 type OpenAIRecordUsageInput struct {
 	Result       *OpenAIForwardResult
-	ApiKey       *ApiKey
+	APIKey       *APIKey
 	User         *User
 	Account      *Account
 	Subscription *UserSubscription
@@ -955,7 +955,7 @@ type OpenAIRecordUsageInput struct {
 // RecordUsage records usage and deducts balance
 func (s *OpenAIGatewayService) RecordUsage(ctx context.Context, input *OpenAIRecordUsageInput) error {
 	result := input.Result
-	apiKey := input.ApiKey
+	apiKey := input.APIKey
 	user := input.User
 	account := input.Account
 	subscription := input.Subscription
@@ -997,7 +997,7 @@ func (s *OpenAIGatewayService) RecordUsage(ctx context.Context, input *OpenAIRec
 	durationMs := int(result.Duration.Milliseconds())
 	usageLog := &UsageLog{
 		UserID:              user.ID,
-		ApiKeyID:            apiKey.ID,
+		APIKeyID:            apiKey.ID,
 		AccountID:           account.ID,
 		RequestID:           result.RequestID,
 		Model:               result.Model,

backend/internal/service/setting_service.go

@@ -61,9 +61,9 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		SettingKeySiteName,
 		SettingKeySiteLogo,
 		SettingKeySiteSubtitle,
-		SettingKeyApiBaseUrl,
+		SettingKeyAPIBaseURL,
 		SettingKeyContactInfo,
-		SettingKeyDocUrl,
+		SettingKeyDocURL,
 	}
 
 	settings, err := s.settingRepo.GetMultiple(ctx, keys)
@@ -79,9 +79,9 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		SiteName:            s.getStringOrDefault(settings, SettingKeySiteName, "Sub2API"),
 		SiteLogo:            settings[SettingKeySiteLogo],
 		SiteSubtitle:        s.getStringOrDefault(settings, SettingKeySiteSubtitle, "Subscription to API Conversion Platform"),
-		APIBaseURL:          settings[SettingKeyApiBaseUrl],
+		APIBaseURL:          settings[SettingKeyAPIBaseURL],
 		ContactInfo:         settings[SettingKeyContactInfo],
-		DocURL:              settings[SettingKeyDocUrl],
+		DocURL:              settings[SettingKeyDocURL],
 	}, nil
 }
 
@@ -94,15 +94,15 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 	updates[SettingKeyEmailVerifyEnabled] = strconv.FormatBool(settings.EmailVerifyEnabled)
 
 	// 邮件服务设置（只有非空才更新密码）
-	updates[SettingKeySmtpHost] = settings.SMTPHost
-	updates[SettingKeySmtpPort] = strconv.Itoa(settings.SMTPPort)
-	updates[SettingKeySmtpUsername] = settings.SMTPUsername
+	updates[SettingKeySMTPHost] = settings.SMTPHost
+	updates[SettingKeySMTPPort] = strconv.Itoa(settings.SMTPPort)
+	updates[SettingKeySMTPUsername] = settings.SMTPUsername
 	if settings.SMTPPassword != "" {
-		updates[SettingKeySmtpPassword] = settings.SMTPPassword
+		updates[SettingKeySMTPPassword] = settings.SMTPPassword
 	}
-	updates[SettingKeySmtpFrom] = settings.SMTPFrom
-	updates[SettingKeySmtpFromName] = settings.SMTPFromName
-	updates[SettingKeySmtpUseTLS] = strconv.FormatBool(settings.SMTPUseTLS)
+	updates[SettingKeySMTPFrom] = settings.SMTPFrom
+	updates[SettingKeySMTPFromName] = settings.SMTPFromName
+	updates[SettingKeySMTPUseTLS] = strconv.FormatBool(settings.SMTPUseTLS)
 
 	// Cloudflare Turnstile 设置（只有非空才更新密钥）
 	updates[SettingKeyTurnstileEnabled] = strconv.FormatBool(settings.TurnstileEnabled)
@@ -115,9 +115,9 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 	updates[SettingKeySiteName] = settings.SiteName
 	updates[SettingKeySiteLogo] = settings.SiteLogo
 	updates[SettingKeySiteSubtitle] = settings.SiteSubtitle
-	updates[SettingKeyApiBaseUrl] = settings.APIBaseURL
+	updates[SettingKeyAPIBaseURL] = settings.APIBaseURL
 	updates[SettingKeyContactInfo] = settings.ContactInfo
-	updates[SettingKeyDocUrl] = settings.DocURL
+	updates[SettingKeyDocURL] = settings.DocURL
 
 	// 默认配置
 	updates[SettingKeyDefaultConcurrency] = strconv.Itoa(settings.DefaultConcurrency)
@@ -205,8 +205,8 @@ func (s *SettingService) InitializeDefaultSettings(ctx context.Context) error {
 		SettingKeySiteLogo:            "",
 		SettingKeyDefaultConcurrency:  strconv.Itoa(s.cfg.Default.UserConcurrency),
 		SettingKeyDefaultBalance:      strconv.FormatFloat(s.cfg.Default.UserBalance, 'f', 8, 64),
-		SettingKeySmtpPort:            "587",
-		SettingKeySmtpUseTLS:          "false",
+		SettingKeySMTPPort:            "587",
+		SettingKeySMTPUseTLS:          "false",
 		// Model fallback defaults
 		SettingKeyEnableModelFallback:      "false",
 		SettingKeyFallbackModelAnthropic:   "claude-3-5-sonnet-20241022",
@@ -223,23 +223,23 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 	result := &SystemSettings{
 		RegistrationEnabled: settings[SettingKeyRegistrationEnabled] == "true",
 		EmailVerifyEnabled:  settings[SettingKeyEmailVerifyEnabled] == "true",
-		SMTPHost:            settings[SettingKeySmtpHost],
-		SMTPUsername:        settings[SettingKeySmtpUsername],
-		SMTPFrom:            settings[SettingKeySmtpFrom],
-		SMTPFromName:        settings[SettingKeySmtpFromName],
-		SMTPUseTLS:          settings[SettingKeySmtpUseTLS] == "true",
+		SMTPHost:            settings[SettingKeySMTPHost],
+		SMTPUsername:        settings[SettingKeySMTPUsername],
+		SMTPFrom:            settings[SettingKeySMTPFrom],
+		SMTPFromName:        settings[SettingKeySMTPFromName],
+		SMTPUseTLS:          settings[SettingKeySMTPUseTLS] == "true",
 		TurnstileEnabled:    settings[SettingKeyTurnstileEnabled] == "true",
 		TurnstileSiteKey:    settings[SettingKeyTurnstileSiteKey],
 		SiteName:            s.getStringOrDefault(settings, SettingKeySiteName, "Sub2API"),
 		SiteLogo:            settings[SettingKeySiteLogo],
 		SiteSubtitle:        s.getStringOrDefault(settings, SettingKeySiteSubtitle, "Subscription to API Conversion Platform"),
-		APIBaseURL:          settings[SettingKeyApiBaseUrl],
+		APIBaseURL:          settings[SettingKeyAPIBaseURL],
 		ContactInfo:         settings[SettingKeyContactInfo],
-		DocURL:              settings[SettingKeyDocUrl],
+		DocURL:              settings[SettingKeyDocURL],
 	}
 
 	// 解析整数类型
-	if port, err := strconv.Atoi(settings[SettingKeySmtpPort]); err == nil {
+	if port, err := strconv.Atoi(settings[SettingKeySMTPPort]); err == nil {
 		result.SMTPPort = port
 	} else {
 		result.SMTPPort = 587
@@ -259,7 +259,7 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 	}
 
 	// 敏感信息直接返回，方便测试连接时使用
-	result.SMTPPassword = settings[SettingKeySmtpPassword]
+	result.SMTPPassword = settings[SettingKeySMTPPassword]
 	result.TurnstileSecretKey = settings[SettingKeyTurnstileSecretKey]
 
 	// Model fallback settings
@@ -298,28 +298,28 @@ func (s *SettingService) GetTurnstileSecretKey(ctx context.Context) string {
 	return value
 }
 
-// GenerateAdminApiKey 生成新的管理员 API Key
-func (s *SettingService) GenerateAdminApiKey(ctx context.Context) (string, error) {
+// GenerateAdminAPIKey 生成新的管理员 API Key
+func (s *SettingService) GenerateAdminAPIKey(ctx context.Context) (string, error) {
 	// 生成 32 字节随机数 = 64 位十六进制字符
 	bytes := make([]byte, 32)
 	if _, err := rand.Read(bytes); err != nil {
 		return "", fmt.Errorf("generate random bytes: %w", err)
 	}
 
-	key := AdminApiKeyPrefix + hex.EncodeToString(bytes)
+	key := AdminAPIKeyPrefix + hex.EncodeToString(bytes)
 
 	// 存储到 settings 表
-	if err := s.settingRepo.Set(ctx, SettingKeyAdminApiKey, key); err != nil {
+	if err := s.settingRepo.Set(ctx, SettingKeyAdminAPIKey, key); err != nil {
 		return "", fmt.Errorf("save admin api key: %w", err)
 	}
 
 	return key, nil
 }
 
-// GetAdminApiKeyStatus 获取管理员 API Key 状态
+// GetAdminAPIKeyStatus 获取管理员 API Key 状态
 // 返回脱敏的 key、是否存在、错误
-func (s *SettingService) GetAdminApiKeyStatus(ctx context.Context) (maskedKey string, exists bool, err error) {
-	key, err := s.settingRepo.GetValue(ctx, SettingKeyAdminApiKey)
+func (s *SettingService) GetAdminAPIKeyStatus(ctx context.Context) (maskedKey string, exists bool, err error) {
+	key, err := s.settingRepo.GetValue(ctx, SettingKeyAdminAPIKey)
 	if err != nil {
 		if errors.Is(err, ErrSettingNotFound) {
 			return "", false, nil
@@ -340,10 +340,10 @@ func (s *SettingService) GetAdminApiKeyStatus(ctx context.Context) (maskedKey st
 	return maskedKey, true, nil
 }
 
-// GetAdminApiKey 获取完整的管理员 API Key（仅供内部验证使用）
+// GetAdminAPIKey 获取完整的管理员 API Key（仅供内部验证使用）
 // 如果未配置返回空字符串和 nil 错误，只有数据库错误时才返回 error
-func (s *SettingService) GetAdminApiKey(ctx context.Context) (string, error) {
-	key, err := s.settingRepo.GetValue(ctx, SettingKeyAdminApiKey)
+func (s *SettingService) GetAdminAPIKey(ctx context.Context) (string, error) {
+	key, err := s.settingRepo.GetValue(ctx, SettingKeyAdminAPIKey)
 	if err != nil {
 		if errors.Is(err, ErrSettingNotFound) {
 			return "", nil // 未配置，返回空字符串
@@ -353,9 +353,9 @@ func (s *SettingService) GetAdminApiKey(ctx context.Context) (string, error) {
 	return key, nil
 }
 
-// DeleteAdminApiKey 删除管理员 API Key
-func (s *SettingService) DeleteAdminApiKey(ctx context.Context) error {
-	return s.settingRepo.Delete(ctx, SettingKeyAdminApiKey)
+// DeleteAdminAPIKey 删除管理员 API Key
+func (s *SettingService) DeleteAdminAPIKey(ctx context.Context) error {
+	return s.settingRepo.Delete(ctx, SettingKeyAdminAPIKey)
 }
 
 // IsModelFallbackEnabled 检查是否启用模型兜底机制

backend/internal/service/token_refresher_test.go

@@ -197,7 +197,7 @@ func TestClaudeTokenRefresher_CanRefresh(t *testing.T) {
 		{
 			name:     "anthropic api-key - cannot refresh",
 			platform: PlatformAnthropic,
-			accType:  AccountTypeApiKey,
+			accType:  AccountTypeAPIKey,
 			want:     false,
 		},
 		{

backend/internal/service/update_service.go

@@ -79,7 +79,7 @@ type ReleaseInfo struct {
 	Name        string  `json:"name"`
 	Body        string  `json:"body"`
 	PublishedAt string  `json:"published_at"`
-	HtmlURL     string  `json:"html_url"`
+	HTMLURL     string  `json:"html_url"`
 	Assets      []Asset `json:"assets,omitempty"`
 }
 
@@ -96,13 +96,13 @@ type GitHubRelease struct {
 	Name        string        `json:"name"`
 	Body        string        `json:"body"`
 	PublishedAt string        `json:"published_at"`
-	HtmlUrl     string        `json:"html_url"`
+	HTMLURL     string        `json:"html_url"`
 	Assets      []GitHubAsset `json:"assets"`
 }
 
 type GitHubAsset struct {
 	Name               string `json:"name"`
-	BrowserDownloadUrl string `json:"browser_download_url"`
+	BrowserDownloadURL string `json:"browser_download_url"`
 	Size               int64  `json:"size"`
 }
 
@@ -285,7 +285,7 @@ func (s *UpdateService) fetchLatestRelease(ctx context.Context) (*UpdateInfo, er
 	for i, a := range release.Assets {
 		assets[i] = Asset{
 			Name:        a.Name,
-			DownloadURL: a.BrowserDownloadUrl,
+			DownloadURL: a.BrowserDownloadURL,
 			Size:        a.Size,
 		}
 	}
@@ -298,7 +298,7 @@ func (s *UpdateService) fetchLatestRelease(ctx context.Context) (*UpdateInfo, er
 			Name:        release.Name,
 			Body:        release.Body,
 			PublishedAt: release.PublishedAt,
-			HtmlURL:     release.HtmlUrl,
+			HTMLURL:     release.HTMLURL,
 			Assets:      assets,
 		},
 		Cached:    false,

backend/internal/service/usage_log.go

@@ -10,7 +10,7 @@ const (
 type UsageLog struct {
 	ID        int64
 	UserID    int64
-	ApiKeyID  int64
+	APIKeyID  int64
 	AccountID int64
 	RequestID string
 	Model     string
@@ -42,7 +42,7 @@ type UsageLog struct {
 	CreatedAt time.Time
 
 	User         *User
-	ApiKey       *ApiKey
+	APIKey       *APIKey
 	Account      *Account
 	Group        *Group
 	Subscription *UserSubscription

backend/internal/service/usage_service.go

@@ -19,7 +19,7 @@ var (
 // CreateUsageLogRequest 创建使用日志请求
 type CreateUsageLogRequest struct {
 	UserID                int64   `json:"user_id"`
-	ApiKeyID              int64   `json:"api_key_id"`
+	APIKeyID              int64   `json:"api_key_id"`
 	AccountID             int64   `json:"account_id"`
 	RequestID             string  `json:"request_id"`
 	Model                 string  `json:"model"`
@@ -91,7 +91,7 @@ func (s *UsageService) Create(ctx context.Context, req CreateUsageLogRequest) (*
 	// 创建使用日志
 	usageLog := &UsageLog{
 		UserID:                req.UserID,
-		ApiKeyID:              req.ApiKeyID,
+		APIKeyID:              req.APIKeyID,
 		AccountID:             req.AccountID,
 		RequestID:             req.RequestID,
 		Model:                 req.Model,
@@ -151,9 +151,9 @@ func (s *UsageService) ListByUser(ctx context.Context, userID int64, params pagi
 	return logs, pagination, nil
 }
 
-// ListByApiKey 获取API Key的使用日志列表
-func (s *UsageService) ListByApiKey(ctx context.Context, apiKeyID int64, params pagination.PaginationParams) ([]UsageLog, *pagination.PaginationResult, error) {
-	logs, pagination, err := s.usageRepo.ListByApiKey(ctx, apiKeyID, params)
+// ListByAPIKey 获取API Key的使用日志列表
+func (s *UsageService) ListByAPIKey(ctx context.Context, apiKeyID int64, params pagination.PaginationParams) ([]UsageLog, *pagination.PaginationResult, error) {
+	logs, pagination, err := s.usageRepo.ListByAPIKey(ctx, apiKeyID, params)
 	if err != nil {
 		return nil, nil, fmt.Errorf("list usage logs: %w", err)
 	}
@@ -188,9 +188,9 @@ func (s *UsageService) GetStatsByUser(ctx context.Context, userID int64, startTi
 	}, nil
 }
 
-// GetStatsByApiKey 获取API Key的使用统计
-func (s *UsageService) GetStatsByApiKey(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) (*UsageStats, error) {
-	stats, err := s.usageRepo.GetApiKeyStatsAggregated(ctx, apiKeyID, startTime, endTime)
+// GetStatsByAPIKey 获取API Key的使用统计
+func (s *UsageService) GetStatsByAPIKey(ctx context.Context, apiKeyID int64, startTime, endTime time.Time) (*UsageStats, error) {
+	stats, err := s.usageRepo.GetAPIKeyStatsAggregated(ctx, apiKeyID, startTime, endTime)
 	if err != nil {
 		return nil, fmt.Errorf("get api key stats: %w", err)
 	}
@@ -293,9 +293,9 @@ func (s *UsageService) GetUserModelStats(ctx context.Context, userID int64, star
 	return stats, nil
 }
 
-// GetBatchApiKeyUsageStats returns today/total actual_cost for given api keys.
-func (s *UsageService) GetBatchApiKeyUsageStats(ctx context.Context, apiKeyIDs []int64) (map[int64]*usagestats.BatchApiKeyUsageStats, error) {
-	stats, err := s.usageRepo.GetBatchApiKeyUsageStats(ctx, apiKeyIDs)
+// GetBatchAPIKeyUsageStats returns today/total actual_cost for given api keys.
+func (s *UsageService) GetBatchAPIKeyUsageStats(ctx context.Context, apiKeyIDs []int64) (map[int64]*usagestats.BatchAPIKeyUsageStats, error) {
+	stats, err := s.usageRepo.GetBatchAPIKeyUsageStats(ctx, apiKeyIDs)
 	if err != nil {
 		return nil, fmt.Errorf("get batch api key usage stats: %w", err)
 	}

backend/internal/service/user.go

@@ -21,7 +21,7 @@ type User struct {
 	CreatedAt     time.Time
 	UpdatedAt     time.Time
 
-	ApiKeys       []ApiKey
+	APIKeys       []APIKey
 	Subscriptions []UserSubscription
 }
 

backend/internal/service/wire.go

@@ -75,7 +75,7 @@ var ProviderSet = wire.NewSet(
 	// Core services
 	NewAuthService,
 	NewUserService,
-	NewApiKeyService,
+	NewAPIKeyService,
 	NewGroupService,
 	NewAccountService,
 	NewProxyService,