refactor(usage): 移动 usage 查询到 services

backend/.golangci.yml

@@ -17,10 +17,17 @@ linters:
         service-no-repository:
           list-mode: original
           files:
-            - internal/service/**
+            - "**/internal/service/**"
           deny:
             - pkg: sub2api/internal/repository
               desc: "service must not import repository"
+        handler-no-repository:
+          list-mode: original
+          files:
+            - "**/internal/handler/**"
+          deny:
+            - pkg: sub2api/internal/repository
+              desc: "handler must not import repository"
     errcheck:
       # Report about not checking of errors in type assertions: `a := b.(MyStruct)`.
       # Such cases aren't reported by default.

backend/cmd/server/wire_gen.go

@@ -58,7 +58,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	apiKeyHandler := handler.NewAPIKeyHandler(apiKeyService)
 	usageLogRepository := repository.NewUsageLogRepository(db)
 	usageService := service.NewUsageService(usageLogRepository, userRepository)
-	usageHandler := handler.NewUsageHandler(usageService, usageLogRepository, apiKeyService)
+	usageHandler := handler.NewUsageHandler(usageService, apiKeyService)
 	redeemCodeRepository := repository.NewRedeemCodeRepository(db)
 	billingCache := repository.NewBillingCache(client)
 	billingCacheService := service.NewBillingCacheService(billingCache, userRepository, userSubscriptionRepository)
@@ -67,7 +67,8 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	redeemService := service.NewRedeemService(redeemCodeRepository, userRepository, subscriptionService, redeemCache, billingCacheService)
 	redeemHandler := handler.NewRedeemHandler(redeemService)
 	subscriptionHandler := handler.NewSubscriptionHandler(subscriptionService)
-	dashboardHandler := admin.NewDashboardHandler(usageLogRepository)
+	dashboardService := service.NewDashboardService(usageLogRepository)
+	dashboardHandler := admin.NewDashboardHandler(dashboardService)
 	accountRepository := repository.NewAccountRepository(db)
 	proxyRepository := repository.NewProxyRepository(db)
 	proxyExitInfoProber := repository.NewProxyExitInfoProber()
@@ -83,7 +84,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	accountUsageService := service.NewAccountUsageService(accountRepository, usageLogRepository, claudeUsageFetcher)
 	httpUpstream := repository.NewHTTPUpstream(configConfig)
 	accountTestService := service.NewAccountTestService(accountRepository, oAuthService, openAIOAuthService, httpUpstream)
-	accountHandler := admin.NewAccountHandler(adminService, oAuthService, openAIOAuthService, rateLimitService, accountUsageService, accountTestService, usageLogRepository)
+	accountHandler := admin.NewAccountHandler(adminService, oAuthService, openAIOAuthService, rateLimitService, accountUsageService, accountTestService)
 	oAuthHandler := admin.NewOAuthHandler(oAuthService)
 	openAIOAuthHandler := admin.NewOpenAIOAuthHandler(openAIOAuthService, adminService)
 	proxyHandler := admin.NewProxyHandler(adminService)
@@ -95,7 +96,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	updateService := service.ProvideUpdateService(updateCache, gitHubReleaseClient, serviceBuildInfo)
 	systemHandler := handler.ProvideSystemHandler(updateService)
 	adminSubscriptionHandler := admin.NewSubscriptionHandler(subscriptionService)
-	adminUsageHandler := admin.NewUsageHandler(usageLogRepository, apiKeyRepository, usageService, adminService)
+	adminUsageHandler := admin.NewUsageHandler(usageService, apiKeyService, adminService)
 	adminHandlers := handler.ProvideAdminHandlers(dashboardHandler, adminUserHandler, groupHandler, accountHandler, oAuthHandler, openAIOAuthHandler, proxyHandler, adminRedeemHandler, settingHandler, systemHandler, adminSubscriptionHandler, adminUsageHandler)
 	gatewayCache := repository.NewGatewayCache(client)
 	pricingRemoteClient := repository.NewPricingRemoteClient()

backend/internal/handler/admin/account_handler.go

@@ -7,7 +7,6 @@ import (
 	"sub2api/internal/pkg/openai"
 	"sub2api/internal/pkg/response"
 	"sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
 	"sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
@@ -33,11 +32,10 @@ type AccountHandler struct {
 	rateLimitService    *service.RateLimitService
 	accountUsageService *service.AccountUsageService
 	accountTestService  *service.AccountTestService
-	usageLogRepo        *repository.UsageLogRepository
 }
 
 // NewAccountHandler creates a new admin account handler
-func NewAccountHandler(adminService service.AdminService, oauthService *service.OAuthService, openaiOAuthService *service.OpenAIOAuthService, rateLimitService *service.RateLimitService, accountUsageService *service.AccountUsageService, accountTestService *service.AccountTestService, usageLogRepo *repository.UsageLogRepository) *AccountHandler {
+func NewAccountHandler(adminService service.AdminService, oauthService *service.OAuthService, openaiOAuthService *service.OpenAIOAuthService, rateLimitService *service.RateLimitService, accountUsageService *service.AccountUsageService, accountTestService *service.AccountTestService) *AccountHandler {
 	return &AccountHandler{
 		adminService:        adminService,
 		oauthService:        oauthService,
@@ -45,7 +43,6 @@ func NewAccountHandler(adminService service.AdminService, oauthService *service.
 		rateLimitService:    rateLimitService,
 		accountUsageService: accountUsageService,
 		accountTestService:  accountTestService,
-		usageLogRepo:        usageLogRepo,
 	}
 }
 
@@ -314,7 +311,7 @@ func (h *AccountHandler) GetStats(c *gin.Context) {
 	endTime := timezone.StartOfDay(now.AddDate(0, 0, 1))
 	startTime := timezone.StartOfDay(now.AddDate(0, 0, -days+1))
 
-	stats, err := h.usageLogRepo.GetAccountUsageStats(c.Request.Context(), accountID, startTime, endTime)
+	stats, err := h.accountUsageService.GetAccountUsageStats(c.Request.Context(), accountID, startTime, endTime)
 	if err != nil {
 		response.InternalError(c, "Failed to get account stats: "+err.Error())
 		return

backend/internal/handler/admin/dashboard_handler.go

@@ -4,7 +4,7 @@ import (
 	"strconv"
 	"sub2api/internal/pkg/response"
 	"sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
+	"sub2api/internal/service"
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -12,15 +12,15 @@ import (
 
 // DashboardHandler handles admin dashboard statistics
 type DashboardHandler struct {
-	usageRepo *repository.UsageLogRepository
+	dashboardService *service.DashboardService
-	startTime time.Time // Server start time for uptime calculation
+	startTime        time.Time // Server start time for uptime calculation
 }
 
 // NewDashboardHandler creates a new admin dashboard handler
-func NewDashboardHandler(usageRepo *repository.UsageLogRepository) *DashboardHandler {
+func NewDashboardHandler(dashboardService *service.DashboardService) *DashboardHandler {
 	return &DashboardHandler{
-		usageRepo: usageRepo,
+		dashboardService: dashboardService,
-		startTime: time.Now(),
+		startTime:        time.Now(),
 	}
 }
 
@@ -58,7 +58,7 @@ func parseTimeRange(c *gin.Context) (time.Time, time.Time) {
 // GetStats handles getting dashboard statistics
 // GET /api/v1/admin/dashboard/stats
 func (h *DashboardHandler) GetStats(c *gin.Context) {
-	stats, err := h.usageRepo.GetDashboardStats(c.Request.Context())
+	stats, err := h.dashboardService.GetDashboardStats(c.Request.Context())
 	if err != nil {
 		response.Error(c, 500, "Failed to get dashboard statistics")
 		return
@@ -142,7 +142,7 @@ func (h *DashboardHandler) GetUsageTrend(c *gin.Context) {
 		}
 	}
 
-	trend, err := h.usageRepo.GetUsageTrendWithFilters(c.Request.Context(), startTime, endTime, granularity, userID, apiKeyID)
+	trend, err := h.dashboardService.GetUsageTrendWithFilters(c.Request.Context(), startTime, endTime, granularity, userID, apiKeyID)
 	if err != nil {
 		response.Error(c, 500, "Failed to get usage trend")
 		return
@@ -175,7 +175,7 @@ func (h *DashboardHandler) GetModelStats(c *gin.Context) {
 		}
 	}
 
-	stats, err := h.usageRepo.GetModelStatsWithFilters(c.Request.Context(), startTime, endTime, userID, apiKeyID, 0)
+	stats, err := h.dashboardService.GetModelStatsWithFilters(c.Request.Context(), startTime, endTime, userID, apiKeyID)
 	if err != nil {
 		response.Error(c, 500, "Failed to get model statistics")
 		return
@@ -200,7 +200,7 @@ func (h *DashboardHandler) GetApiKeyUsageTrend(c *gin.Context) {
 		limit = 5
 	}
 
-	trend, err := h.usageRepo.GetApiKeyUsageTrend(c.Request.Context(), startTime, endTime, granularity, limit)
+	trend, err := h.dashboardService.GetApiKeyUsageTrend(c.Request.Context(), startTime, endTime, granularity, limit)
 	if err != nil {
 		response.Error(c, 500, "Failed to get API key usage trend")
 		return
@@ -226,7 +226,7 @@ func (h *DashboardHandler) GetUserUsageTrend(c *gin.Context) {
 		limit = 12
 	}
 
-	trend, err := h.usageRepo.GetUserUsageTrend(c.Request.Context(), startTime, endTime, granularity, limit)
+	trend, err := h.dashboardService.GetUserUsageTrend(c.Request.Context(), startTime, endTime, granularity, limit)
 	if err != nil {
 		response.Error(c, 500, "Failed to get user usage trend")
 		return
@@ -259,7 +259,7 @@ func (h *DashboardHandler) GetBatchUsersUsage(c *gin.Context) {
 		return
 	}
 
-	stats, err := h.usageRepo.GetBatchUserUsageStats(c.Request.Context(), req.UserIDs)
+	stats, err := h.dashboardService.GetBatchUserUsageStats(c.Request.Context(), req.UserIDs)
 	if err != nil {
 		response.Error(c, 500, "Failed to get user usage stats")
 		return
@@ -287,7 +287,7 @@ func (h *DashboardHandler) GetBatchApiKeysUsage(c *gin.Context) {
 		return
 	}
 
-	stats, err := h.usageRepo.GetBatchApiKeyUsageStats(c.Request.Context(), req.ApiKeyIDs)
+	stats, err := h.dashboardService.GetBatchApiKeyUsageStats(c.Request.Context(), req.ApiKeyIDs)
 	if err != nil {
 		response.Error(c, 500, "Failed to get API key usage stats")
 		return

backend/internal/handler/admin/usage_handler.go

@@ -7,7 +7,7 @@ import (
 	"sub2api/internal/pkg/pagination"
 	"sub2api/internal/pkg/response"
 	"sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
+	"sub2api/internal/pkg/usagestats"
 	"sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
@@ -15,24 +15,21 @@ import (
 
 // UsageHandler handles admin usage-related requests
 type UsageHandler struct {
-	usageRepo    *repository.UsageLogRepository
+	usageService  *service.UsageService
-	apiKeyRepo   *repository.ApiKeyRepository
+	apiKeyService *service.ApiKeyService
-	usageService *service.UsageService
+	adminService  service.AdminService
-	adminService service.AdminService
 }
 
 // NewUsageHandler creates a new admin usage handler
 func NewUsageHandler(
-	usageRepo *repository.UsageLogRepository,
-	apiKeyRepo *repository.ApiKeyRepository,
 	usageService *service.UsageService,
+	apiKeyService *service.ApiKeyService,
 	adminService service.AdminService,
 ) *UsageHandler {
 	return &UsageHandler{
-		usageRepo:    usageRepo,
+		usageService:  usageService,
-		apiKeyRepo:   apiKeyRepo,
+		apiKeyService: apiKeyService,
-		usageService: usageService,
+		adminService:  adminService,
-		adminService: adminService,
 	}
 }
 
@@ -84,14 +81,14 @@ func (h *UsageHandler) List(c *gin.Context) {
 	}
 
 	params := pagination.PaginationParams{Page: page, PageSize: pageSize}
-	filters := repository.UsageLogFilters{
+	filters := usagestats.UsageLogFilters{
 		UserID:    userID,
 		ApiKeyID:  apiKeyID,
 		StartTime: startTime,
 		EndTime:   endTime,
 	}
 
-	records, result, err := h.usageRepo.ListWithFilters(c.Request.Context(), params, filters)
+	records, result, err := h.usageService.ListWithFilters(c.Request.Context(), params, filters)
 	if err != nil {
 		response.InternalError(c, "Failed to list usage records: "+err.Error())
 		return
@@ -179,7 +176,7 @@ func (h *UsageHandler) Stats(c *gin.Context) {
 	}
 
 	// Get global stats
-	stats, err := h.usageRepo.GetGlobalStats(c.Request.Context(), startTime, endTime)
+	stats, err := h.usageService.GetGlobalStats(c.Request.Context(), startTime, endTime)
 	if err != nil {
 		response.InternalError(c, "Failed to get usage statistics: "+err.Error())
 		return
@@ -237,7 +234,7 @@ func (h *UsageHandler) SearchApiKeys(c *gin.Context) {
 		userID = id
 	}
 
-	keys, err := h.apiKeyRepo.SearchApiKeys(c.Request.Context(), userID, keyword, 30)
+	keys, err := h.apiKeyService.SearchApiKeys(c.Request.Context(), userID, keyword, 30)
 	if err != nil {
 		response.InternalError(c, "Failed to search API keys: "+err.Error())
 		return

backend/internal/handler/usage_handler.go

@@ -8,7 +8,6 @@ import (
 	"sub2api/internal/pkg/pagination"
 	"sub2api/internal/pkg/response"
 	"sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
 	"sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
@@ -17,15 +16,13 @@ import (
 // UsageHandler handles usage-related requests
 type UsageHandler struct {
 	usageService  *service.UsageService
-	usageRepo     *repository.UsageLogRepository
 	apiKeyService *service.ApiKeyService
 }
 
 // NewUsageHandler creates a new UsageHandler
-func NewUsageHandler(usageService *service.UsageService, usageRepo *repository.UsageLogRepository, apiKeyService *service.ApiKeyService) *UsageHandler {
+func NewUsageHandler(usageService *service.UsageService, apiKeyService *service.ApiKeyService) *UsageHandler {
 	return &UsageHandler{
 		usageService:  usageService,
-		usageRepo:     usageRepo,
 		apiKeyService: apiKeyService,
 	}
 }
@@ -260,7 +257,7 @@ func (h *UsageHandler) DashboardStats(c *gin.Context) {
 		return
 	}
 
-	stats, err := h.usageRepo.GetUserDashboardStats(c.Request.Context(), user.ID)
+	stats, err := h.usageService.GetUserDashboardStats(c.Request.Context(), user.ID)
 	if err != nil {
 		response.InternalError(c, "Failed to get dashboard statistics")
 		return
@@ -287,7 +284,7 @@ func (h *UsageHandler) DashboardTrend(c *gin.Context) {
 	startTime, endTime := parseUserTimeRange(c)
 	granularity := c.DefaultQuery("granularity", "day")
 
-	trend, err := h.usageRepo.GetUserUsageTrendByUserID(c.Request.Context(), user.ID, startTime, endTime, granularity)
+	trend, err := h.usageService.GetUserUsageTrendByUserID(c.Request.Context(), user.ID, startTime, endTime, granularity)
 	if err != nil {
 		response.InternalError(c, "Failed to get usage trend")
 		return
@@ -318,7 +315,7 @@ func (h *UsageHandler) DashboardModels(c *gin.Context) {
 
 	startTime, endTime := parseUserTimeRange(c)
 
-	stats, err := h.usageRepo.GetUserModelStats(c.Request.Context(), user.ID, startTime, endTime)
+	stats, err := h.usageService.GetUserModelStats(c.Request.Context(), user.ID, startTime, endTime)
 	if err != nil {
 		response.InternalError(c, "Failed to get model statistics")
 		return
@@ -387,7 +384,7 @@ func (h *UsageHandler) DashboardApiKeysUsage(c *gin.Context) {
 		return
 	}
 
-	stats, err := h.usageRepo.GetBatchApiKeyUsageStats(c.Request.Context(), validApiKeyIDs)
+	stats, err := h.usageService.GetBatchApiKeyUsageStats(c.Request.Context(), validApiKeyIDs)
 	if err != nil {
 		response.InternalError(c, "Failed to get API key usage stats")
 		return

backend/internal/pkg/usagestats/usage_log_types.go

@@ -0,0 +1,201 @@
+package usagestats
+
+import "time"
+
+// DashboardStats 仪表盘统计
+type DashboardStats struct {
+	// 用户统计
+	TotalUsers    int64 `json:"total_users"`
+	TodayNewUsers int64 `json:"today_new_users"` // 今日新增用户数
+	ActiveUsers   int64 `json:"active_users"`    // 今日有请求的用户数
+
+	// API Key 统计
+	TotalApiKeys  int64 `json:"total_api_keys"`
+	ActiveApiKeys int64 `json:"active_api_keys"` // 状态为 active 的 API Key 数
+
+	// 账户统计
+	TotalAccounts     int64 `json:"total_accounts"`
+	NormalAccounts    int64 `json:"normal_accounts"`    // 正常账户数 (schedulable=true, status=active)
+	ErrorAccounts     int64 `json:"error_accounts"`     // 异常账户数 (status=error)
+	RateLimitAccounts int64 `json:"ratelimit_accounts"` // 限流账户数
+	OverloadAccounts  int64 `json:"overload_accounts"`  // 过载账户数
+
+	// 累计 Token 使用统计
+	TotalRequests            int64   `json:"total_requests"`
+	TotalInputTokens         int64   `json:"total_input_tokens"`
+	TotalOutputTokens        int64   `json:"total_output_tokens"`
+	TotalCacheCreationTokens int64   `json:"total_cache_creation_tokens"`
+	TotalCacheReadTokens     int64   `json:"total_cache_read_tokens"`
+	TotalTokens              int64   `json:"total_tokens"`
+	TotalCost                float64 `json:"total_cost"`        // 累计标准计费
+	TotalActualCost          float64 `json:"total_actual_cost"` // 累计实际扣除
+
+	// 今日 Token 使用统计
+	TodayRequests            int64   `json:"today_requests"`
+	TodayInputTokens         int64   `json:"today_input_tokens"`
+	TodayOutputTokens        int64   `json:"today_output_tokens"`
+	TodayCacheCreationTokens int64   `json:"today_cache_creation_tokens"`
+	TodayCacheReadTokens     int64   `json:"today_cache_read_tokens"`
+	TodayTokens              int64   `json:"today_tokens"`
+	TodayCost                float64 `json:"today_cost"`        // 今日标准计费
+	TodayActualCost          float64 `json:"today_actual_cost"` // 今日实际扣除
+
+	// 系统运行统计
+	AverageDurationMs float64 `json:"average_duration_ms"` // 平均响应时间
+}
+
+// TrendDataPoint represents a single point in trend data
+type TrendDataPoint struct {
+	Date         string  `json:"date"`
+	Requests     int64   `json:"requests"`
+	InputTokens  int64   `json:"input_tokens"`
+	OutputTokens int64   `json:"output_tokens"`
+	CacheTokens  int64   `json:"cache_tokens"`
+	TotalTokens  int64   `json:"total_tokens"`
+	Cost         float64 `json:"cost"`        // 标准计费
+	ActualCost   float64 `json:"actual_cost"` // 实际扣除
+}
+
+// ModelStat represents usage statistics for a single model
+type ModelStat struct {
+	Model        string  `json:"model"`
+	Requests     int64   `json:"requests"`
+	InputTokens  int64   `json:"input_tokens"`
+	OutputTokens int64   `json:"output_tokens"`
+	TotalTokens  int64   `json:"total_tokens"`
+	Cost         float64 `json:"cost"`        // 标准计费
+	ActualCost   float64 `json:"actual_cost"` // 实际扣除
+}
+
+// UserUsageTrendPoint represents user usage trend data point
+type UserUsageTrendPoint struct {
+	Date       string  `json:"date"`
+	UserID     int64   `json:"user_id"`
+	Email      string  `json:"email"`
+	Requests   int64   `json:"requests"`
+	Tokens     int64   `json:"tokens"`
+	Cost       float64 `json:"cost"`        // 标准计费
+	ActualCost float64 `json:"actual_cost"` // 实际扣除
+}
+
+// ApiKeyUsageTrendPoint represents API key usage trend data point
+type ApiKeyUsageTrendPoint struct {
+	Date     string `json:"date"`
+	ApiKeyID int64  `json:"api_key_id"`
+	KeyName  string `json:"key_name"`
+	Requests int64  `json:"requests"`
+	Tokens   int64  `json:"tokens"`
+}
+
+// UserDashboardStats 用户仪表盘统计
+type UserDashboardStats struct {
+	// API Key 统计
+	TotalApiKeys  int64 `json:"total_api_keys"`
+	ActiveApiKeys int64 `json:"active_api_keys"`
+
+	// 累计 Token 使用统计
+	TotalRequests            int64   `json:"total_requests"`
+	TotalInputTokens         int64   `json:"total_input_tokens"`
+	TotalOutputTokens        int64   `json:"total_output_tokens"`
+	TotalCacheCreationTokens int64   `json:"total_cache_creation_tokens"`
+	TotalCacheReadTokens     int64   `json:"total_cache_read_tokens"`
+	TotalTokens              int64   `json:"total_tokens"`
+	TotalCost                float64 `json:"total_cost"`        // 累计标准计费
+	TotalActualCost          float64 `json:"total_actual_cost"` // 累计实际扣除
+
+	// 今日 Token 使用统计
+	TodayRequests            int64   `json:"today_requests"`
+	TodayInputTokens         int64   `json:"today_input_tokens"`
+	TodayOutputTokens        int64   `json:"today_output_tokens"`
+	TodayCacheCreationTokens int64   `json:"today_cache_creation_tokens"`
+	TodayCacheReadTokens     int64   `json:"today_cache_read_tokens"`
+	TodayTokens              int64   `json:"today_tokens"`
+	TodayCost                float64 `json:"today_cost"`        // 今日标准计费
+	TodayActualCost          float64 `json:"today_actual_cost"` // 今日实际扣除
+
+	// 性能统计
+	AverageDurationMs float64 `json:"average_duration_ms"`
+}
+
+// UsageLogFilters represents filters for usage log queries
+type UsageLogFilters struct {
+	UserID    int64
+	ApiKeyID  int64
+	StartTime *time.Time
+	EndTime   *time.Time
+}
+
+// UsageStats represents usage statistics
+type UsageStats struct {
+	TotalRequests     int64   `json:"total_requests"`
+	TotalInputTokens  int64   `json:"total_input_tokens"`
+	TotalOutputTokens int64   `json:"total_output_tokens"`
+	TotalCacheTokens  int64   `json:"total_cache_tokens"`
+	TotalTokens       int64   `json:"total_tokens"`
+	TotalCost         float64 `json:"total_cost"`
+	TotalActualCost   float64 `json:"total_actual_cost"`
+	AverageDurationMs float64 `json:"average_duration_ms"`
+}
+
+// BatchUserUsageStats represents usage stats for a single user
+type BatchUserUsageStats struct {
+	UserID          int64   `json:"user_id"`
+	TodayActualCost float64 `json:"today_actual_cost"`
+	TotalActualCost float64 `json:"total_actual_cost"`
+}
+
+// BatchApiKeyUsageStats represents usage stats for a single API key
+type BatchApiKeyUsageStats struct {
+	ApiKeyID        int64   `json:"api_key_id"`
+	TodayActualCost float64 `json:"today_actual_cost"`
+	TotalActualCost float64 `json:"total_actual_cost"`
+}
+
+// AccountUsageHistory represents daily usage history for an account
+type AccountUsageHistory struct {
+	Date       string  `json:"date"`
+	Label      string  `json:"label"`
+	Requests   int64   `json:"requests"`
+	Tokens     int64   `json:"tokens"`
+	Cost       float64 `json:"cost"`
+	ActualCost float64 `json:"actual_cost"`
+}
+
+// AccountUsageSummary represents summary statistics for an account
+type AccountUsageSummary struct {
+	Days              int     `json:"days"`
+	ActualDaysUsed    int     `json:"actual_days_used"`
+	TotalCost         float64 `json:"total_cost"`
+	TotalStandardCost float64 `json:"total_standard_cost"`
+	TotalRequests     int64   `json:"total_requests"`
+	TotalTokens       int64   `json:"total_tokens"`
+	AvgDailyCost      float64 `json:"avg_daily_cost"`
+	AvgDailyRequests  float64 `json:"avg_daily_requests"`
+	AvgDailyTokens    float64 `json:"avg_daily_tokens"`
+	AvgDurationMs     float64 `json:"avg_duration_ms"`
+	Today             *struct {
+		Date     string  `json:"date"`
+		Cost     float64 `json:"cost"`
+		Requests int64   `json:"requests"`
+		Tokens   int64   `json:"tokens"`
+	} `json:"today"`
+	HighestCostDay *struct {
+		Date     string  `json:"date"`
+		Label    string  `json:"label"`
+		Cost     float64 `json:"cost"`
+		Requests int64   `json:"requests"`
+	} `json:"highest_cost_day"`
+	HighestRequestDay *struct {
+		Date     string  `json:"date"`
+		Label    string  `json:"label"`
+		Requests int64   `json:"requests"`
+		Cost     float64 `json:"cost"`
+	} `json:"highest_request_day"`
+}
+
+// AccountUsageStatsResponse represents the full usage statistics response for an account
+type AccountUsageStatsResponse struct {
+	History []AccountUsageHistory `json:"history"`
+	Summary AccountUsageSummary   `json:"summary"`
+	Models  []ModelStat           `json:"models"`
+}

backend/internal/repository/usage_log_repo.go

@@ -113,46 +113,7 @@ func (r *UsageLogRepository) GetUserStats(ctx context.Context, userID int64, sta
 }
 
 // DashboardStats 仪表盘统计
-type DashboardStats struct {
+type DashboardStats = usagestats.DashboardStats
-	// 用户统计
-	TotalUsers    int64 `json:"total_users"`
-	TodayNewUsers int64 `json:"today_new_users"` // 今日新增用户数
-	ActiveUsers   int64 `json:"active_users"`    // 今日有请求的用户数
-
-	// API Key 统计
-	TotalApiKeys  int64 `json:"total_api_keys"`
-	ActiveApiKeys int64 `json:"active_api_keys"` // 状态为 active 的 API Key 数
-
-	// 账户统计
-	TotalAccounts     int64 `json:"total_accounts"`
-	NormalAccounts    int64 `json:"normal_accounts"`    // 正常账户数 (schedulable=true, status=active)
-	ErrorAccounts     int64 `json:"error_accounts"`     // 异常账户数 (status=error)
-	RateLimitAccounts int64 `json:"ratelimit_accounts"` // 限流账户数
-	OverloadAccounts  int64 `json:"overload_accounts"`  // 过载账户数
-
-	// 累计 Token 使用统计
-	TotalRequests            int64   `json:"total_requests"`
-	TotalInputTokens         int64   `json:"total_input_tokens"`
-	TotalOutputTokens        int64   `json:"total_output_tokens"`
-	TotalCacheCreationTokens int64   `json:"total_cache_creation_tokens"`
-	TotalCacheReadTokens     int64   `json:"total_cache_read_tokens"`
-	TotalTokens              int64   `json:"total_tokens"`
-	TotalCost                float64 `json:"total_cost"`        // 累计标准计费
-	TotalActualCost          float64 `json:"total_actual_cost"` // 累计实际扣除
-
-	// 今日 Token 使用统计
-	TodayRequests            int64   `json:"today_requests"`
-	TodayInputTokens         int64   `json:"today_input_tokens"`
-	TodayOutputTokens        int64   `json:"today_output_tokens"`
-	TodayCacheCreationTokens int64   `json:"today_cache_creation_tokens"`
-	TodayCacheReadTokens     int64   `json:"today_cache_read_tokens"`
-	TodayTokens              int64   `json:"today_tokens"`
-	TodayCost                float64 `json:"today_cost"`        // 今日标准计费
-	TodayActualCost          float64 `json:"today_actual_cost"` // 今日实际扣除
-
-	// 系统运行统计
-	AverageDurationMs float64 `json:"average_duration_ms"` // 平均响应时间
-}
 
 func (r *UsageLogRepository) GetDashboardStats(ctx context.Context) (*DashboardStats, error) {
 	var stats DashboardStats
@@ -398,47 +359,16 @@ func (r *UsageLogRepository) GetAccountWindowStats(ctx context.Context, accountI
 }
 
 // TrendDataPoint represents a single point in trend data
-type TrendDataPoint struct {
+type TrendDataPoint = usagestats.TrendDataPoint
-	Date         string  `json:"date"`
-	Requests     int64   `json:"requests"`
-	InputTokens  int64   `json:"input_tokens"`
-	OutputTokens int64   `json:"output_tokens"`
-	CacheTokens  int64   `json:"cache_tokens"`
-	TotalTokens  int64   `json:"total_tokens"`
-	Cost         float64 `json:"cost"`        // 标准计费
-	ActualCost   float64 `json:"actual_cost"` // 实际扣除
-}
 
 // ModelStat represents usage statistics for a single model
-type ModelStat struct {
+type ModelStat = usagestats.ModelStat
-	Model        string  `json:"model"`
-	Requests     int64   `json:"requests"`
-	InputTokens  int64   `json:"input_tokens"`
-	OutputTokens int64   `json:"output_tokens"`
-	TotalTokens  int64   `json:"total_tokens"`
-	Cost         float64 `json:"cost"`        // 标准计费
-	ActualCost   float64 `json:"actual_cost"` // 实际扣除
-}
 
 // UserUsageTrendPoint represents user usage trend data point
-type UserUsageTrendPoint struct {
+type UserUsageTrendPoint = usagestats.UserUsageTrendPoint
-	Date       string  `json:"date"`
-	UserID     int64   `json:"user_id"`
-	Email      string  `json:"email"`
-	Requests   int64   `json:"requests"`
-	Tokens     int64   `json:"tokens"`
-	Cost       float64 `json:"cost"`        // 标准计费
-	ActualCost float64 `json:"actual_cost"` // 实际扣除
-}
 
 // ApiKeyUsageTrendPoint represents API key usage trend data point
-type ApiKeyUsageTrendPoint struct {
+type ApiKeyUsageTrendPoint = usagestats.ApiKeyUsageTrendPoint
-	Date     string `json:"date"`
-	ApiKeyID int64  `json:"api_key_id"`
-	KeyName  string `json:"key_name"`
-	Requests int64  `json:"requests"`
-	Tokens   int64  `json:"tokens"`
-}
 
 // GetApiKeyUsageTrend returns usage trend data grouped by API key and date
 func (r *UsageLogRepository) GetApiKeyUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) ([]ApiKeyUsageTrendPoint, error) {
@@ -531,34 +461,7 @@ func (r *UsageLogRepository) GetUserUsageTrend(ctx context.Context, startTime, e
 }
 
 // UserDashboardStats 用户仪表盘统计
-type UserDashboardStats struct {
+type UserDashboardStats = usagestats.UserDashboardStats
-	// API Key 统计
-	TotalApiKeys  int64 `json:"total_api_keys"`
-	ActiveApiKeys int64 `json:"active_api_keys"`
-
-	// 累计 Token 使用统计
-	TotalRequests            int64   `json:"total_requests"`
-	TotalInputTokens         int64   `json:"total_input_tokens"`
-	TotalOutputTokens        int64   `json:"total_output_tokens"`
-	TotalCacheCreationTokens int64   `json:"total_cache_creation_tokens"`
-	TotalCacheReadTokens     int64   `json:"total_cache_read_tokens"`
-	TotalTokens              int64   `json:"total_tokens"`
-	TotalCost                float64 `json:"total_cost"`        // 累计标准计费
-	TotalActualCost          float64 `json:"total_actual_cost"` // 累计实际扣除
-
-	// 今日 Token 使用统计
-	TodayRequests            int64   `json:"today_requests"`
-	TodayInputTokens         int64   `json:"today_input_tokens"`
-	TodayOutputTokens        int64   `json:"today_output_tokens"`
-	TodayCacheCreationTokens int64   `json:"today_cache_creation_tokens"`
-	TodayCacheReadTokens     int64   `json:"today_cache_read_tokens"`
-	TodayTokens              int64   `json:"today_tokens"`
-	TodayCost                float64 `json:"today_cost"`        // 今日标准计费
-	TodayActualCost          float64 `json:"today_actual_cost"` // 今日实际扣除
-
-	// 性能统计
-	AverageDurationMs float64 `json:"average_duration_ms"`
-}
 
 // GetUserDashboardStats 获取用户专属的仪表盘统计
 func (r *UsageLogRepository) GetUserDashboardStats(ctx context.Context, userID int64) (*UserDashboardStats, error) {
@@ -705,12 +608,7 @@ func (r *UsageLogRepository) GetUserModelStats(ctx context.Context, userID int64
 }
 
 // UsageLogFilters represents filters for usage log queries
-type UsageLogFilters struct {
+type UsageLogFilters = usagestats.UsageLogFilters
-	UserID    int64
-	ApiKeyID  int64
-	StartTime *time.Time
-	EndTime   *time.Time
-}
 
 // ListWithFilters lists usage logs with optional filters (for admin)
 func (r *UsageLogRepository) ListWithFilters(ctx context.Context, params pagination.PaginationParams, filters UsageLogFilters) ([]model.UsageLog, *pagination.PaginationResult, error) {
@@ -758,23 +656,10 @@ func (r *UsageLogRepository) ListWithFilters(ctx context.Context, params paginat
 }
 
 // UsageStats represents usage statistics
-type UsageStats struct {
+type UsageStats = usagestats.UsageStats
-	TotalRequests     int64   `json:"total_requests"`
-	TotalInputTokens  int64   `json:"total_input_tokens"`
-	TotalOutputTokens int64   `json:"total_output_tokens"`
-	TotalCacheTokens  int64   `json:"total_cache_tokens"`
-	TotalTokens       int64   `json:"total_tokens"`
-	TotalCost         float64 `json:"total_cost"`
-	TotalActualCost   float64 `json:"total_actual_cost"`
-	AverageDurationMs float64 `json:"average_duration_ms"`
-}
 
 // BatchUserUsageStats represents usage stats for a single user
-type BatchUserUsageStats struct {
+type BatchUserUsageStats = usagestats.BatchUserUsageStats
-	UserID          int64   `json:"user_id"`
-	TodayActualCost float64 `json:"today_actual_cost"`
-	TotalActualCost float64 `json:"total_actual_cost"`
-}
 
 // GetBatchUserUsageStats gets today and total actual_cost for multiple users
 func (r *UsageLogRepository) GetBatchUserUsageStats(ctx context.Context, userIDs []int64) (map[int64]*BatchUserUsageStats, error) {
@@ -834,11 +719,7 @@ func (r *UsageLogRepository) GetBatchUserUsageStats(ctx context.Context, userIDs
 }
 
 // BatchApiKeyUsageStats represents usage stats for a single API key
-type BatchApiKeyUsageStats struct {
+type BatchApiKeyUsageStats = usagestats.BatchApiKeyUsageStats
-	ApiKeyID        int64   `json:"api_key_id"`
-	TodayActualCost float64 `json:"today_actual_cost"`
-	TotalActualCost float64 `json:"total_actual_cost"`
-}
 
 // GetBatchApiKeyUsageStats gets today and total actual_cost for multiple API keys
 func (r *UsageLogRepository) GetBatchApiKeyUsageStats(ctx context.Context, apiKeyIDs []int64) (map[int64]*BatchApiKeyUsageStats, error) {
@@ -1012,53 +893,13 @@ func (r *UsageLogRepository) GetGlobalStats(ctx context.Context, startTime, endT
 }
 
 // AccountUsageHistory represents daily usage history for an account
-type AccountUsageHistory struct {
+type AccountUsageHistory = usagestats.AccountUsageHistory
-	Date       string  `json:"date"`
-	Label      string  `json:"label"`
-	Requests   int64   `json:"requests"`
-	Tokens     int64   `json:"tokens"`
-	Cost       float64 `json:"cost"`
-	ActualCost float64 `json:"actual_cost"`
-}
 
 // AccountUsageSummary represents summary statistics for an account
-type AccountUsageSummary struct {
+type AccountUsageSummary = usagestats.AccountUsageSummary
-	Days              int     `json:"days"`
-	ActualDaysUsed    int     `json:"actual_days_used"`
-	TotalCost         float64 `json:"total_cost"`
-	TotalStandardCost float64 `json:"total_standard_cost"`
-	TotalRequests     int64   `json:"total_requests"`
-	TotalTokens       int64   `json:"total_tokens"`
-	AvgDailyCost      float64 `json:"avg_daily_cost"`
-	AvgDailyRequests  float64 `json:"avg_daily_requests"`
-	AvgDailyTokens    float64 `json:"avg_daily_tokens"`
-	AvgDurationMs     float64 `json:"avg_duration_ms"`
-	Today             *struct {
-		Date     string  `json:"date"`
-		Cost     float64 `json:"cost"`
-		Requests int64   `json:"requests"`
-		Tokens   int64   `json:"tokens"`
-	} `json:"today"`
-	HighestCostDay *struct {
-		Date     string  `json:"date"`
-		Label    string  `json:"label"`
-		Cost     float64 `json:"cost"`
-		Requests int64   `json:"requests"`
-	} `json:"highest_cost_day"`
-	HighestRequestDay *struct {
-		Date     string  `json:"date"`
-		Label    string  `json:"label"`
-		Requests int64   `json:"requests"`
-		Cost     float64 `json:"cost"`
-	} `json:"highest_request_day"`
-}
 
 // AccountUsageStatsResponse represents the full usage statistics response for an account
-type AccountUsageStatsResponse struct {
+type AccountUsageStatsResponse = usagestats.AccountUsageStatsResponse
-	History []AccountUsageHistory `json:"history"`
-	Summary AccountUsageSummary   `json:"summary"`
-	Models  []ModelStat           `json:"models"`
-}
 
 // GetAccountUsageStats returns comprehensive usage statistics for an account over a time range
 func (r *UsageLogRepository) GetAccountUsageStats(ctx context.Context, accountID int64, startTime, endTime time.Time) (*AccountUsageStatsResponse, error) {

backend/internal/service/account_usage_service.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"sub2api/internal/model"
+	"sub2api/internal/pkg/usagestats"
 	"sub2api/internal/service/ports"
 )
 
@@ -176,6 +177,14 @@ func (s *AccountUsageService) GetTodayStats(ctx context.Context, accountID int64
 	}, nil
 }
 
+func (s *AccountUsageService) GetAccountUsageStats(ctx context.Context, accountID int64, startTime, endTime time.Time) (*usagestats.AccountUsageStatsResponse, error) {
+	stats, err := s.usageLogRepo.GetAccountUsageStats(ctx, accountID, startTime, endTime)
+	if err != nil {
+		return nil, fmt.Errorf("get account usage stats failed: %w", err)
+	}
+	return stats, nil
+}
+
 // fetchOAuthUsage 从Anthropic API获取OAuth账号的使用量
 func (s *AccountUsageService) fetchOAuthUsage(ctx context.Context, account *model.Account) (*UsageInfo, error) {
 	accessToken := account.GetCredential("access_token")

backend/internal/service/api_key_service.go

@@ -455,3 +455,11 @@ func (s *ApiKeyService) canUserBindGroupInternal(user *model.User, group *model.
 	// 标准类型分组：使用原有逻辑
 	return user.CanBindGroup(group.ID, group.IsExclusive)
 }
+
+func (s *ApiKeyService) SearchApiKeys(ctx context.Context, userID int64, keyword string, limit int) ([]model.ApiKey, error) {
+	keys, err := s.apiKeyRepo.SearchApiKeys(ctx, userID, keyword, limit)
+	if err != nil {
+		return nil, fmt.Errorf("search api keys: %w", err)
+	}
+	return keys, nil
+}

backend/internal/service/dashboard_service.go

@@ -0,0 +1,77 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"sub2api/internal/pkg/usagestats"
+	"sub2api/internal/service/ports"
+)
+
+// DashboardService provides aggregated statistics for admin dashboard.
+type DashboardService struct {
+	usageRepo ports.UsageLogRepository
+}
+
+func NewDashboardService(usageRepo ports.UsageLogRepository) *DashboardService {
+	return &DashboardService{
+		usageRepo: usageRepo,
+	}
+}
+
+func (s *DashboardService) GetDashboardStats(ctx context.Context) (*usagestats.DashboardStats, error) {
+	stats, err := s.usageRepo.GetDashboardStats(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("get dashboard stats: %w", err)
+	}
+	return stats, nil
+}
+
+func (s *DashboardService) GetUsageTrendWithFilters(ctx context.Context, startTime, endTime time.Time, granularity string, userID, apiKeyID int64) ([]usagestats.TrendDataPoint, error) {
+	trend, err := s.usageRepo.GetUsageTrendWithFilters(ctx, startTime, endTime, granularity, userID, apiKeyID)
+	if err != nil {
+		return nil, fmt.Errorf("get usage trend with filters: %w", err)
+	}
+	return trend, nil
+}
+
+func (s *DashboardService) GetModelStatsWithFilters(ctx context.Context, startTime, endTime time.Time, userID, apiKeyID int64) ([]usagestats.ModelStat, error) {
+	stats, err := s.usageRepo.GetModelStatsWithFilters(ctx, startTime, endTime, userID, apiKeyID, 0)
+	if err != nil {
+		return nil, fmt.Errorf("get model stats with filters: %w", err)
+	}
+	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)
+	if err != nil {
+		return nil, fmt.Errorf("get api key usage trend: %w", err)
+	}
+	return trend, nil
+}
+
+func (s *DashboardService) GetUserUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) ([]usagestats.UserUsageTrendPoint, error) {
+	trend, err := s.usageRepo.GetUserUsageTrend(ctx, startTime, endTime, granularity, limit)
+	if err != nil {
+		return nil, fmt.Errorf("get user usage trend: %w", err)
+	}
+	return trend, nil
+}
+
+func (s *DashboardService) GetBatchUserUsageStats(ctx context.Context, userIDs []int64) (map[int64]*usagestats.BatchUserUsageStats, error) {
+	stats, err := s.usageRepo.GetBatchUserUsageStats(ctx, userIDs)
+	if err != nil {
+		return nil, fmt.Errorf("get batch user usage stats: %w", err)
+	}
+	return stats, nil
+}
+
+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)
+	}
+	return stats, nil
+}

backend/internal/service/ports/usage_log.go

@@ -25,4 +25,25 @@ type UsageLogRepository interface {
 
 	GetAccountWindowStats(ctx context.Context, accountID int64, startTime time.Time) (*usagestats.AccountStats, error)
 	GetAccountTodayStats(ctx context.Context, accountID int64) (*usagestats.AccountStats, error)
+
+	// Admin dashboard stats
+	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)
+	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)
+
+	// User dashboard stats
+	GetUserDashboardStats(ctx context.Context, userID int64) (*usagestats.UserDashboardStats, error)
+	GetUserUsageTrendByUserID(ctx context.Context, userID int64, startTime, endTime time.Time, granularity string) ([]usagestats.TrendDataPoint, error)
+	GetUserModelStats(ctx context.Context, userID int64, startTime, endTime time.Time) ([]usagestats.ModelStat, error)
+
+	// Admin usage listing/stats
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, filters usagestats.UsageLogFilters) ([]model.UsageLog, *pagination.PaginationResult, error)
+	GetGlobalStats(ctx context.Context, startTime, endTime time.Time) (*usagestats.UsageStats, error)
+
+	// Account stats
+	GetAccountUsageStats(ctx context.Context, accountID int64, startTime, endTime time.Time) (*usagestats.AccountUsageStatsResponse, error)
 }

backend/internal/service/usage_service.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"sub2api/internal/model"
 	"sub2api/internal/pkg/pagination"
+	"sub2api/internal/pkg/usagestats"
 	"sub2api/internal/service/ports"
 	"time"
 
@@ -282,3 +283,57 @@ func (s *UsageService) Delete(ctx context.Context, id int64) error {
 	}
 	return nil
 }
+
+// GetUserDashboardStats returns per-user dashboard summary stats.
+func (s *UsageService) GetUserDashboardStats(ctx context.Context, userID int64) (*usagestats.UserDashboardStats, error) {
+	stats, err := s.usageRepo.GetUserDashboardStats(ctx, userID)
+	if err != nil {
+		return nil, fmt.Errorf("get user dashboard stats: %w", err)
+	}
+	return stats, nil
+}
+
+// GetUserUsageTrendByUserID returns per-user usage trend.
+func (s *UsageService) GetUserUsageTrendByUserID(ctx context.Context, userID int64, startTime, endTime time.Time, granularity string) ([]usagestats.TrendDataPoint, error) {
+	trend, err := s.usageRepo.GetUserUsageTrendByUserID(ctx, userID, startTime, endTime, granularity)
+	if err != nil {
+		return nil, fmt.Errorf("get user usage trend: %w", err)
+	}
+	return trend, nil
+}
+
+// GetUserModelStats returns per-user model usage stats.
+func (s *UsageService) GetUserModelStats(ctx context.Context, userID int64, startTime, endTime time.Time) ([]usagestats.ModelStat, error) {
+	stats, err := s.usageRepo.GetUserModelStats(ctx, userID, startTime, endTime)
+	if err != nil {
+		return nil, fmt.Errorf("get user model stats: %w", err)
+	}
+	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)
+	if err != nil {
+		return nil, fmt.Errorf("get batch api key usage stats: %w", err)
+	}
+	return stats, nil
+}
+
+// ListWithFilters lists usage logs with admin filters.
+func (s *UsageService) ListWithFilters(ctx context.Context, params pagination.PaginationParams, filters usagestats.UsageLogFilters) ([]model.UsageLog, *pagination.PaginationResult, error) {
+	logs, result, err := s.usageRepo.ListWithFilters(ctx, params, filters)
+	if err != nil {
+		return nil, nil, fmt.Errorf("list usage logs with filters: %w", err)
+	}
+	return logs, result, nil
+}
+
+// GetGlobalStats returns global usage stats for a time range.
+func (s *UsageService) GetGlobalStats(ctx context.Context, startTime, endTime time.Time) (*usagestats.UsageStats, error) {
+	stats, err := s.usageRepo.GetGlobalStats(ctx, startTime, endTime)
+	if err != nil {
+		return nil, fmt.Errorf("get global usage stats: %w", err)
+	}
+	return stats, nil
+}

backend/internal/service/wire.go

@@ -56,6 +56,7 @@ var ProviderSet = wire.NewSet(
 	NewProxyService,
 	NewRedeemService,
 	NewUsageService,
+	NewDashboardService,
 	ProvidePricingService,
 	NewBillingService,
 	NewBillingCacheService,