Merge branch 'feat/rename-go-module'

- 后台系统设置新增文档链接(doc_url)配置项
- 首页顶部导航栏显示文档链接图标(条件渲染)
- Footer区域添加文档链接和GitHub链接
- 支持中英文国际化

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/main.go

@@ -15,11 +15,11 @@ import (
 	"syscall"
 	"time"
 
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/handler"
+	"github.com/Wei-Shaw/sub2api/internal/handler"
-	"sub2api/internal/middleware"
+	"github.com/Wei-Shaw/sub2api/internal/middleware"
-	"sub2api/internal/setup"
+	"github.com/Wei-Shaw/sub2api/internal/setup"
-	"sub2api/internal/web"
+	"github.com/Wei-Shaw/sub2api/internal/web"
 
 	"github.com/gin-gonic/gin"
 )

backend/cmd/server/wire.go

@@ -4,12 +4,12 @@
 package main
 
 import (
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/handler"
+	"github.com/Wei-Shaw/sub2api/internal/handler"
-	"sub2api/internal/infrastructure"
+	"github.com/Wei-Shaw/sub2api/internal/infrastructure"
-	"sub2api/internal/repository"
+	"github.com/Wei-Shaw/sub2api/internal/repository"
-	"sub2api/internal/server"
+	"github.com/Wei-Shaw/sub2api/internal/server"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"context"
 	"log"

backend/cmd/server/wire_gen.go

@@ -8,17 +8,17 @@ package main
 
 import (
 	"context"
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/handler"
+	"github.com/Wei-Shaw/sub2api/internal/handler/admin"
+	"github.com/Wei-Shaw/sub2api/internal/infrastructure"
+	"github.com/Wei-Shaw/sub2api/internal/repository"
+	"github.com/Wei-Shaw/sub2api/internal/server"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 	"github.com/redis/go-redis/v9"
 	"gorm.io/gorm"
 	"log"
 	"net/http"
-	"sub2api/internal/config"
-	"sub2api/internal/handler"
-	"sub2api/internal/handler/admin"
-	"sub2api/internal/infrastructure"
-	"sub2api/internal/repository"
-	"sub2api/internal/server"
-	"sub2api/internal/service"
 	"time"
 )
 
@@ -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 +84,9 @@ 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)
+	concurrencyCache := repository.NewConcurrencyCache(client)
+	concurrencyService := service.NewConcurrencyService(concurrencyCache)
+	accountHandler := admin.NewAccountHandler(adminService, oAuthService, openAIOAuthService, rateLimitService, accountUsageService, accountTestService, concurrencyService)
 	oAuthHandler := admin.NewOAuthHandler(oAuthService)
 	openAIOAuthHandler := admin.NewOpenAIOAuthHandler(openAIOAuthService, adminService)
 	proxyHandler := admin.NewProxyHandler(adminService)
@@ -95,7 +98,7 @@ 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()
@@ -107,8 +110,6 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	identityCache := repository.NewIdentityCache(client)
 	identityService := service.NewIdentityService(identityCache)
 	gatewayService := service.NewGatewayService(accountRepository, usageLogRepository, userRepository, userSubscriptionRepository, gatewayCache, configConfig, billingService, rateLimitService, billingCacheService, identityService, httpUpstream)
-	concurrencyCache := repository.NewConcurrencyCache(client)
-	concurrencyService := service.NewConcurrencyService(concurrencyCache)
 	gatewayHandler := handler.NewGatewayHandler(gatewayService, userService, concurrencyService, billingCacheService)
 	openAIGatewayService := service.NewOpenAIGatewayService(accountRepository, usageLogRepository, userRepository, userSubscriptionRepository, gatewayCache, configConfig, billingService, rateLimitService, billingCacheService, httpUpstream)
 	openAIGatewayHandler := handler.NewOpenAIGatewayHandler(openAIGatewayService, concurrencyService, billingCacheService)

backend/go.mod

@@ -1,4 +1,4 @@
-module sub2api
+module github.com/Wei-Shaw/sub2api
 
 go 1.24.0
 

backend/internal/handler/admin/account_handler.go

@@ -3,12 +3,12 @@ package admin
 import (
 	"strconv"
 
-	"sub2api/internal/pkg/claude"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/claude"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
-	"sub2api/internal/pkg/timezone"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/repository"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/timezone"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )
@@ -33,11 +33,11 @@ type AccountHandler struct {
 	rateLimitService    *service.RateLimitService
 	accountUsageService *service.AccountUsageService
 	accountTestService  *service.AccountTestService
-	usageLogRepo        *repository.UsageLogRepository
+	concurrencyService  *service.ConcurrencyService
 }
 
 // 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, concurrencyService *service.ConcurrencyService) *AccountHandler {
 	return &AccountHandler{
 		adminService:        adminService,
 		oauthService:        oauthService,
@@ -45,7 +45,7 @@ func NewAccountHandler(adminService service.AdminService, oauthService *service.
 		rateLimitService:    rateLimitService,
 		accountUsageService: accountUsageService,
 		accountTestService:  accountTestService,
-		usageLogRepo:        usageLogRepo,
+		concurrencyService:  concurrencyService,
 	}
 }
 
@@ -76,6 +76,12 @@ type UpdateAccountRequest struct {
 	GroupIDs    *[]int64       `json:"group_ids"`
 }
 
+// AccountWithConcurrency extends Account with real-time concurrency info
+type AccountWithConcurrency struct {
+	*model.Account
+	CurrentConcurrency int `json:"current_concurrency"`
+}
+
 // List handles listing all accounts with pagination
 // GET /api/v1/admin/accounts
 func (h *AccountHandler) List(c *gin.Context) {
@@ -91,7 +97,28 @@ func (h *AccountHandler) List(c *gin.Context) {
 		return
 	}
 
-	response.Paginated(c, accounts, total, page, pageSize)
+	// Get current concurrency counts for all accounts
+	accountIDs := make([]int64, len(accounts))
+	for i, acc := range accounts {
+		accountIDs[i] = acc.ID
+	}
+
+	concurrencyCounts, err := h.concurrencyService.GetAccountConcurrencyBatch(c.Request.Context(), accountIDs)
+	if err != nil {
+		// Log error but don't fail the request, just use 0 for all
+		concurrencyCounts = make(map[int64]int)
+	}
+
+	// Build response with concurrency info
+	result := make([]AccountWithConcurrency, len(accounts))
+	for i := range accounts {
+		result[i] = AccountWithConcurrency{
+			Account:            &accounts[i],
+			CurrentConcurrency: concurrencyCounts[accounts[i].ID],
+		}
+	}
+
+	response.Paginated(c, result, total, page, pageSize)
 }
 
 // GetByID handles getting an account by ID
@@ -314,7 +341,7 @@ 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

@@ -1,10 +1,10 @@
 package admin
 
 import (
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/timezone"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 	"strconv"
-	"sub2api/internal/pkg/response"
-	"sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
 	"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
@@ -107,6 +107,10 @@ func (h *DashboardHandler) GetStats(c *gin.Context) {
 		// 系统运行统计
 		"average_duration_ms": stats.AverageDurationMs,
 		"uptime":              uptime,
+
+		// 性能指标
+		"rpm": stats.Rpm,
+		"tpm": stats.Tpm,
 	})
 }
 
@@ -142,7 +146,7 @@ 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 +179,7 @@ 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 +204,7 @@ 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 +230,7 @@ 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 +263,7 @@ 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 +291,7 @@ 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/group_handler.go

@@ -3,9 +3,9 @@ package admin
 import (
 	"strconv"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/admin/openai_oauth_handler.go

@@ -3,8 +3,8 @@ package admin
 import (
 	"strconv"
 
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/admin/proxy_handler.go

@@ -4,8 +4,8 @@ import (
 	"strconv"
 	"strings"
 
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/admin/redeem_handler.go

@@ -6,8 +6,8 @@ import (
 	"fmt"
 	"strconv"
 
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/admin/setting_handler.go

@@ -1,9 +1,9 @@
 package admin
 
 import (
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )
@@ -60,6 +60,7 @@ type UpdateSettingsRequest struct {
 	SiteSubtitle string `json:"site_subtitle"`
 	ApiBaseUrl   string `json:"api_base_url"`
 	ContactInfo  string `json:"contact_info"`
+	DocUrl       string `json:"doc_url"`
 
 	// 默认配置
 	DefaultConcurrency int     `json:"default_concurrency"`
@@ -104,6 +105,7 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		SiteSubtitle:        req.SiteSubtitle,
 		ApiBaseUrl:          req.ApiBaseUrl,
 		ContactInfo:         req.ContactInfo,
+		DocUrl:              req.DocUrl,
 		DefaultConcurrency:  req.DefaultConcurrency,
 		DefaultBalance:      req.DefaultBalance,
 	}

backend/internal/handler/admin/subscription_handler.go

@@ -3,10 +3,10 @@ package admin
 import (
 	"strconv"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/admin/system_handler.go

@@ -4,9 +4,9 @@ import (
 	"net/http"
 	"time"
 
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/pkg/sysutil"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/sysutil"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/admin/usage_handler.go

@@ -4,35 +4,32 @@ import (
 	"strconv"
 	"time"
 
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/pkg/timezone"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/usagestats"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )
 
 // 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/admin/user_handler.go

@@ -3,8 +3,8 @@ package admin
 import (
 	"strconv"
 
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/api_key_handler.go

@@ -3,10 +3,10 @@ package handler
 import (
 	"strconv"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/auth_handler.go

@@ -1,9 +1,9 @@
 package handler
 
 import (
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/gateway_handler.go

@@ -10,11 +10,11 @@ import (
 	"strings"
 	"time"
 
-	"sub2api/internal/middleware"
+	"github.com/Wei-Shaw/sub2api/internal/middleware"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/claude"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/claude"
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/gateway_helper.go

@@ -6,8 +6,8 @@ import (
 	"net/http"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/handler.go

@@ -1,7 +1,7 @@
 package handler
 
 import (
-	"sub2api/internal/handler/admin"
+	"github.com/Wei-Shaw/sub2api/internal/handler/admin"
 )
 
 // AdminHandlers contains all admin-related HTTP handlers

backend/internal/handler/openai_gateway_handler.go

@@ -9,9 +9,9 @@ import (
 	"net/http"
 	"time"
 
-	"sub2api/internal/middleware"
+	"github.com/Wei-Shaw/sub2api/internal/middleware"
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/redeem_handler.go

@@ -1,9 +1,9 @@
 package handler
 
 import (
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/setting_handler.go

@@ -1,8 +1,8 @@
 package handler
 
 import (
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/subscription_handler.go

@@ -1,9 +1,9 @@
 package handler
 
 import (
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/usage_handler.go

@@ -4,12 +4,11 @@ import (
 	"strconv"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/pkg/timezone"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/timezone"
-	"sub2api/internal/repository"
+	"github.com/Wei-Shaw/sub2api/internal/service"
-	"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/handler/user_handler.go

@@ -1,9 +1,9 @@
 package handler
 
 import (
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/handler/wire.go

@@ -1,8 +1,8 @@
 package handler
 
 import (
-	"sub2api/internal/handler/admin"
+	"github.com/Wei-Shaw/sub2api/internal/handler/admin"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/google/wire"
 )

backend/internal/infrastructure/database.go

@@ -1,9 +1,9 @@
 package infrastructure
 
 import (
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/timezone"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/timezone"
 
 	"gorm.io/driver/postgres"
 	"gorm.io/gorm"

backend/internal/infrastructure/redis.go

@@ -1,7 +1,7 @@
 package infrastructure
 
 import (
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/infrastructure/wire.go

@@ -1,7 +1,7 @@
 package infrastructure
 
 import (
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
 
 	"github.com/google/wire"
 	"github.com/redis/go-redis/v9"

backend/internal/middleware/admin_auth.go

@@ -3,9 +3,9 @@ package middleware
 import (
 	"context"
 	"crypto/subtle"
+	"github.com/Wei-Shaw/sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 	"strings"
-	"sub2api/internal/model"
-	"sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/middleware/admin_only.go

@@ -1,7 +1,7 @@
 package middleware
 
 import (
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/middleware/api_key_auth.go

@@ -3,9 +3,9 @@ package middleware
 import (
 	"context"
 	"errors"
+	"github.com/Wei-Shaw/sub2api/internal/model"
 	"log"
 	"strings"
-	"sub2api/internal/model"
 
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"

backend/internal/middleware/jwt_auth.go

@@ -2,9 +2,9 @@ package middleware
 
 import (
 	"context"
+	"github.com/Wei-Shaw/sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 	"strings"
-	"sub2api/internal/model"
-	"sub2api/internal/service"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/model/setting.go

@@ -42,6 +42,7 @@ const (
 	SettingKeySiteSubtitle = "site_subtitle" // 网站副标题
 	SettingKeyApiBaseUrl   = "api_base_url"  // API端点地址（用于客户端配置和导入）
 	SettingKeyContactInfo  = "contact_info"  // 客服联系方式
+	SettingKeyDocUrl       = "doc_url"       // 文档链接
 
 	// 默认配置
 	SettingKeyDefaultConcurrency = "default_concurrency" // 新用户默认并发量
@@ -80,6 +81,7 @@ type SystemSettings struct {
 	SiteSubtitle string `json:"site_subtitle"`
 	ApiBaseUrl   string `json:"api_base_url"`
 	ContactInfo  string `json:"contact_info"`
+	DocUrl       string `json:"doc_url"`
 
 	// 默认配置
 	DefaultConcurrency int     `json:"default_concurrency"`
@@ -97,5 +99,6 @@ type PublicSettings struct {
 	SiteSubtitle        string `json:"site_subtitle"`
 	ApiBaseUrl          string `json:"api_base_url"`
 	ContactInfo         string `json:"contact_info"`
+	DocUrl              string `json:"doc_url"`
 	Version             string `json:"version"`
 }

backend/internal/pkg/usagestats/usage_log_types.go

@@ -0,0 +1,209 @@
+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
+
+	// 性能指标
+	Rpm int64 `json:"rpm"` // 近5分钟平均每分钟请求数
+	Tpm int64 `json:"tpm"` // 近5分钟平均每分钟Token数
+}
+
+// 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"`
+
+	// 性能指标
+	Rpm int64 `json:"rpm"` // 近5分钟平均每分钟请求数
+	Tpm int64 `json:"tpm"` // 近5分钟平均每分钟Token数
+}
+
+// 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/account_repo.go

@@ -2,8 +2,8 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"time"
 
 	"gorm.io/gorm"

backend/internal/repository/api_key_cache.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/repository/api_key_repo.go

@@ -2,8 +2,8 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 
 	"gorm.io/gorm"
 )

backend/internal/repository/billing_cache.go

@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/repository/claude_oauth_service.go

@@ -10,8 +10,8 @@ import (
 	"strings"
 	"time"
 
-	"sub2api/internal/pkg/oauth"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/oauth"
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"github.com/imroc/req/v3"
 )

backend/internal/repository/claude_usage_service.go

@@ -9,7 +9,7 @@ import (
 	"net/url"
 	"time"
 
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 )
 
 type claudeUsageService struct{}

backend/internal/repository/concurrency_cache.go

@@ -5,60 +5,95 @@ import (
 	"fmt"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )
 
 const (
-	accountConcurrencyKeyPrefix = "concurrency:account:"
+	// Key prefixes for independent slot keys
-	userConcurrencyKeyPrefix    = "concurrency:user:"
+	// Format: concurrency:account:{accountID}:{requestID}
-	waitQueueKeyPrefix          = "concurrency:wait:"
+	accountSlotKeyPrefix = "concurrency:account:"
-	concurrencyTTL              = 5 * time.Minute
+	// Format: concurrency:user:{userID}:{requestID}
+	userSlotKeyPrefix = "concurrency:user:"
+	// Wait queue keeps counter format: concurrency:wait:{userID}
+	waitQueueKeyPrefix = "concurrency:wait:"
+
+	// Slot TTL - each slot expires independently
+	slotTTL = 5 * time.Minute
 )
 
 var (
+	// acquireScript uses SCAN to count existing slots and creates new slot if under limit
+	// KEYS[1] = pattern for SCAN (e.g., "concurrency:account:2:*")
+	// KEYS[2] = full slot key (e.g., "concurrency:account:2:req_xxx")
+	// ARGV[1] = maxConcurrency
+	// ARGV[2] = TTL in seconds
 	acquireScript = redis.NewScript(`
-		local current = redis.call('GET', KEYS[1])
+		local pattern = KEYS[1]
-		if current == false then
+		local slotKey = KEYS[2]
-			current = 0
+		local maxConcurrency = tonumber(ARGV[1])
-		else
+		local ttl = tonumber(ARGV[2])
-			current = tonumber(current)
+
-		end
+		-- Count existing slots using SCAN
-		if current < tonumber(ARGV[1]) then
+		local cursor = "0"
-			redis.call('INCR', KEYS[1])
+		local count = 0
-			redis.call('EXPIRE', KEYS[1], ARGV[2])
+		repeat
+			local result = redis.call('SCAN', cursor, 'MATCH', pattern, 'COUNT', 100)
+			cursor = result[1]
+			count = count + #result[2]
+		until cursor == "0"
+
+		-- Check if we can acquire a slot
+		if count < maxConcurrency then
+			redis.call('SET', slotKey, '1', 'EX', ttl)
 			return 1
 		end
+
 		return 0
 	`)
 
-	releaseScript = redis.NewScript(`
+	// getCountScript counts slots using SCAN
-		local current = redis.call('GET', KEYS[1])
+	// KEYS[1] = pattern for SCAN
-		if current ~= false and tonumber(current) > 0 then
+	getCountScript = redis.NewScript(`
-			redis.call('DECR', KEYS[1])
+		local pattern = KEYS[1]
-		end
+		local cursor = "0"
-		return 1
+		local count = 0
+		repeat
+			local result = redis.call('SCAN', cursor, 'MATCH', pattern, 'COUNT', 100)
+			cursor = result[1]
+			count = count + #result[2]
+		until cursor == "0"
+		return count
 	`)
 
+	// incrementWaitScript - only sets TTL on first creation to avoid refreshing
+	// KEYS[1] = wait queue key
+	// ARGV[1] = maxWait
+	// ARGV[2] = TTL in seconds
 	incrementWaitScript = redis.NewScript(`
-		local waitKey = KEYS[1]
+		local current = redis.call('GET', KEYS[1])
-		local maxWait = tonumber(ARGV[1])
-		local ttl = tonumber(ARGV[2])
-		local current = redis.call('GET', waitKey)
 		if current == false then
 			current = 0
 		else
 			current = tonumber(current)
 		end
-		if current >= maxWait then
+
+		if current >= tonumber(ARGV[1]) then
 			return 0
 		end
-		redis.call('INCR', waitKey)
+
-		redis.call('EXPIRE', waitKey, ttl)
+		local newVal = redis.call('INCR', KEYS[1])
+
+		-- Only set TTL on first creation to avoid refreshing zombie data
+		if newVal == 1 then
+			redis.call('EXPIRE', KEYS[1], ARGV[2])
+		end
+
 		return 1
 	`)
 
+	// decrementWaitScript - same as before
 	decrementWaitScript = redis.NewScript(`
 		local current = redis.call('GET', KEYS[1])
 		if current ~= false and tonumber(current) > 0 then
@@ -76,49 +111,86 @@ func NewConcurrencyCache(rdb *redis.Client) ports.ConcurrencyCache {
 	return &concurrencyCache{rdb: rdb}
 }
 
-func (c *concurrencyCache) AcquireAccountSlot(ctx context.Context, accountID int64, maxConcurrency int) (bool, error) {
+// Helper functions for key generation
-	key := fmt.Sprintf("%s%d", accountConcurrencyKeyPrefix, accountID)
+func accountSlotKey(accountID int64, requestID string) string {
-	result, err := acquireScript.Run(ctx, c.rdb, []string{key}, maxConcurrency, int(concurrencyTTL.Seconds())).Int()
+	return fmt.Sprintf("%s%d:%s", accountSlotKeyPrefix, accountID, requestID)
+}
+
+func accountSlotPattern(accountID int64) string {
+	return fmt.Sprintf("%s%d:*", accountSlotKeyPrefix, accountID)
+}
+
+func userSlotKey(userID int64, requestID string) string {
+	return fmt.Sprintf("%s%d:%s", userSlotKeyPrefix, userID, requestID)
+}
+
+func userSlotPattern(userID int64) string {
+	return fmt.Sprintf("%s%d:*", userSlotKeyPrefix, userID)
+}
+
+func waitQueueKey(userID int64) string {
+	return fmt.Sprintf("%s%d", waitQueueKeyPrefix, userID)
+}
+
+// Account slot operations
+
+func (c *concurrencyCache) AcquireAccountSlot(ctx context.Context, accountID int64, maxConcurrency int, requestID string) (bool, error) {
+	pattern := accountSlotPattern(accountID)
+	slotKey := accountSlotKey(accountID, requestID)
+
+	result, err := acquireScript.Run(ctx, c.rdb, []string{pattern, slotKey}, maxConcurrency, int(slotTTL.Seconds())).Int()
 	if err != nil {
 		return false, err
 	}
 	return result == 1, nil
 }
 
-func (c *concurrencyCache) ReleaseAccountSlot(ctx context.Context, accountID int64) error {
+func (c *concurrencyCache) ReleaseAccountSlot(ctx context.Context, accountID int64, requestID string) error {
-	key := fmt.Sprintf("%s%d", accountConcurrencyKeyPrefix, accountID)
+	slotKey := accountSlotKey(accountID, requestID)
-	_, err := releaseScript.Run(ctx, c.rdb, []string{key}).Result()
+	return c.rdb.Del(ctx, slotKey).Err()
-	return err
 }
 
 func (c *concurrencyCache) GetAccountConcurrency(ctx context.Context, accountID int64) (int, error) {
-	key := fmt.Sprintf("%s%d", accountConcurrencyKeyPrefix, accountID)
+	pattern := accountSlotPattern(accountID)
-	return c.rdb.Get(ctx, key).Int()
+	result, err := getCountScript.Run(ctx, c.rdb, []string{pattern}).Int()
+	if err != nil {
+		return 0, err
+	}
+	return result, nil
 }
 
-func (c *concurrencyCache) AcquireUserSlot(ctx context.Context, userID int64, maxConcurrency int) (bool, error) {
+// User slot operations
-	key := fmt.Sprintf("%s%d", userConcurrencyKeyPrefix, userID)
+
-	result, err := acquireScript.Run(ctx, c.rdb, []string{key}, maxConcurrency, int(concurrencyTTL.Seconds())).Int()
+func (c *concurrencyCache) AcquireUserSlot(ctx context.Context, userID int64, maxConcurrency int, requestID string) (bool, error) {
+	pattern := userSlotPattern(userID)
+	slotKey := userSlotKey(userID, requestID)
+
+	result, err := acquireScript.Run(ctx, c.rdb, []string{pattern, slotKey}, maxConcurrency, int(slotTTL.Seconds())).Int()
 	if err != nil {
 		return false, err
 	}
 	return result == 1, nil
 }
 
-func (c *concurrencyCache) ReleaseUserSlot(ctx context.Context, userID int64) error {
+func (c *concurrencyCache) ReleaseUserSlot(ctx context.Context, userID int64, requestID string) error {
-	key := fmt.Sprintf("%s%d", userConcurrencyKeyPrefix, userID)
+	slotKey := userSlotKey(userID, requestID)
-	_, err := releaseScript.Run(ctx, c.rdb, []string{key}).Result()
+	return c.rdb.Del(ctx, slotKey).Err()
-	return err
 }
 
 func (c *concurrencyCache) GetUserConcurrency(ctx context.Context, userID int64) (int, error) {
-	key := fmt.Sprintf("%s%d", userConcurrencyKeyPrefix, userID)
+	pattern := userSlotPattern(userID)
-	return c.rdb.Get(ctx, key).Int()
+	result, err := getCountScript.Run(ctx, c.rdb, []string{pattern}).Int()
+	if err != nil {
+		return 0, err
+	}
+	return result, nil
 }
 
+// Wait queue operations
+
 func (c *concurrencyCache) IncrementWaitCount(ctx context.Context, userID int64, maxWait int) (bool, error) {
-	key := fmt.Sprintf("%s%d", waitQueueKeyPrefix, userID)
+	key := waitQueueKey(userID)
-	result, err := incrementWaitScript.Run(ctx, c.rdb, []string{key}, maxWait, int(concurrencyTTL.Seconds())).Int()
+	result, err := incrementWaitScript.Run(ctx, c.rdb, []string{key}, maxWait, int(slotTTL.Seconds())).Int()
 	if err != nil {
 		return false, err
 	}
@@ -126,7 +198,7 @@ func (c *concurrencyCache) IncrementWaitCount(ctx context.Context, userID int64,
 }
 
 func (c *concurrencyCache) DecrementWaitCount(ctx context.Context, userID int64) error {
-	key := fmt.Sprintf("%s%d", waitQueueKeyPrefix, userID)
+	key := waitQueueKey(userID)
 	_, err := decrementWaitScript.Run(ctx, c.rdb, []string{key}).Result()
 	return err
 }

backend/internal/repository/email_cache.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/repository/gateway_cache.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/repository/github_release_service.go

@@ -9,7 +9,7 @@ import (
 	"os"
 	"time"
 
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 )
 
 type githubReleaseClient struct {

backend/internal/repository/group_repo.go

@@ -2,8 +2,8 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 
 	"gorm.io/gorm"
 )

backend/internal/repository/http_upstream.go

@@ -5,8 +5,8 @@ import (
 	"net/url"
 	"time"
 
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 // httpUpstreamService is a generic HTTP upstream service that can be used for

backend/internal/repository/identity_cache.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/repository/openai_oauth_service.go

@@ -6,8 +6,8 @@ import (
 	"net/url"
 	"time"
 
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/imroc/req/v3"
 )

backend/internal/repository/pricing_service.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 	"time"
 
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 )
 
 type pricingRemoteClient struct {

backend/internal/repository/proxy_probe_service.go

@@ -11,7 +11,7 @@ import (
 	"net/url"
 	"time"
 
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 
 	"golang.org/x/net/proxy"
 )

backend/internal/repository/proxy_repo.go

@@ -2,8 +2,8 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 
 	"gorm.io/gorm"
 )

backend/internal/repository/redeem_cache.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/repository/redeem_code_repo.go

@@ -2,8 +2,8 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"time"
 
 	"gorm.io/gorm"

backend/internal/repository/setting_repo.go

@@ -2,7 +2,7 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
 	"time"
 
 	"gorm.io/gorm"

backend/internal/repository/turnstile_service.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 	"time"
 
-	"sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 )
 
 const turnstileVerifyURL = "https://challenges.cloudflare.com/turnstile/v0/siteverify"

backend/internal/repository/update_cache.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/redis/go-redis/v9"
 )

backend/internal/repository/usage_log_repo.go

@@ -2,10 +2,10 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/pkg/timezone"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/timezone"
-	"sub2api/internal/pkg/usagestats"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/usagestats"
 	"time"
 
 	"gorm.io/gorm"
@@ -19,6 +19,30 @@ func NewUsageLogRepository(db *gorm.DB) *UsageLogRepository {
 	return &UsageLogRepository{db: db}
 }
 
+// getPerformanceStats 获取 RPM 和 TPM（近5分钟平均值，可选按用户过滤）
+func (r *UsageLogRepository) getPerformanceStats(ctx context.Context, userID int64) (rpm, tpm int64) {
+	fiveMinutesAgo := time.Now().Add(-5 * time.Minute)
+	var perfStats struct {
+		RequestCount int64 `gorm:"column:request_count"`
+		TokenCount   int64 `gorm:"column:token_count"`
+	}
+
+	db := r.db.WithContext(ctx).Model(&model.UsageLog{}).
+		Select(`
+			COUNT(*) as request_count,
+			COALESCE(SUM(input_tokens + output_tokens), 0) as token_count
+		`).
+		Where("created_at >= ?", fiveMinutesAgo)
+
+	if userID > 0 {
+		db = db.Where("user_id = ?", userID)
+	}
+
+	db.Scan(&perfStats)
+	// 返回5分钟平均值
+	return perfStats.RequestCount / 5, perfStats.TokenCount / 5
+}
+
 func (r *UsageLogRepository) Create(ctx context.Context, log *model.UsageLog) error {
 	return r.db.WithContext(ctx).Create(log).Error
 }
@@ -113,46 +137,7 @@ 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
@@ -269,6 +254,9 @@ func (r *UsageLogRepository) GetDashboardStats(ctx context.Context) (*DashboardS
 	stats.TodayCost = todayStats.TodayCost
 	stats.TodayActualCost = todayStats.TodayActualCost
 
+	// 性能指标：RPM 和 TPM（最近1分钟，全局）
+	stats.Rpm, stats.Tpm = r.getPerformanceStats(ctx, 0)
+
 	return &stats, nil
 }
 
@@ -398,47 +386,16 @@ 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 +488,7 @@ 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) {
@@ -641,6 +571,9 @@ func (r *UsageLogRepository) GetUserDashboardStats(ctx context.Context, userID i
 	stats.TodayCost = todayStats.TodayCost
 	stats.TodayActualCost = todayStats.TodayActualCost
 
+	// 性能指标：RPM 和 TPM（最近1分钟，仅统计该用户的请求）
+	stats.Rpm, stats.Tpm = r.getPerformanceStats(ctx, userID)
+
 	return &stats, nil
 }
 
@@ -705,12 +638,7 @@ 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 +686,10 @@ 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 +749,7 @@ 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 +923,13 @@ 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/repository/user_repo.go

@@ -2,8 +2,8 @@ package repository
 
 import (
 	"context"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 
 	"gorm.io/gorm"
 )

backend/internal/repository/user_subscription_repo.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 
 	"gorm.io/gorm"
 )

backend/internal/repository/wire.go

@@ -1,7 +1,7 @@
 package repository
 
 import (
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/google/wire"
 )

backend/internal/server/http.go

@@ -1,11 +1,11 @@
 package server
 
 import (
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/handler"
+	"github.com/Wei-Shaw/sub2api/internal/repository"
+	"github.com/Wei-Shaw/sub2api/internal/service"
 	"net/http"
-	"sub2api/internal/config"
-	"sub2api/internal/handler"
-	"sub2api/internal/repository"
-	"sub2api/internal/service"
 	"time"
 
 	"github.com/gin-gonic/gin"

backend/internal/server/router.go

@@ -1,13 +1,13 @@
 package server
 
 import (
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/handler"
+	"github.com/Wei-Shaw/sub2api/internal/middleware"
+	"github.com/Wei-Shaw/sub2api/internal/repository"
+	"github.com/Wei-Shaw/sub2api/internal/service"
+	"github.com/Wei-Shaw/sub2api/internal/web"
 	"net/http"
-	"sub2api/internal/config"
-	"sub2api/internal/handler"
-	"sub2api/internal/middleware"
-	"sub2api/internal/repository"
-	"sub2api/internal/service"
-	"sub2api/internal/web"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/service/account_service.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"gorm.io/gorm"
 )

backend/internal/service/account_test_service.go

@@ -14,10 +14,10 @@ import (
 	"strings"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/claude"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/claude"
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"

backend/internal/service/account_usage_service.go

@@ -7,8 +7,9 @@ import (
 	"sync"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/usagestats"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 // usageCache 用于缓存usage数据
@@ -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/admin_service.go

@@ -7,9 +7,9 @@ import (
 	"log"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"gorm.io/gorm"
 )

backend/internal/service/api_key_service.go

@@ -6,11 +6,11 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/pkg/timezone"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/timezone"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 	"time"
 
 	"github.com/redis/go-redis/v9"
@@ -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/auth_service.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 	"log"
-	"sub2api/internal/config"
-	"sub2api/internal/model"
-	"sub2api/internal/service/ports"
 	"time"
 
 	"github.com/golang-jwt/jwt/v5"

backend/internal/service/billing_cache_service.go

@@ -7,8 +7,8 @@ import (
 	"log"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 // 错误定义

backend/internal/service/billing_service.go

@@ -2,9 +2,9 @@ package service
 
 import (
 	"fmt"
+	"github.com/Wei-Shaw/sub2api/internal/config"
 	"log"
 	"strings"
-	"sub2api/internal/config"
 )
 
 // ModelPricing 模型价格配置（per-token价格，与LiteLLM格式一致）

backend/internal/service/concurrency_service.go

@@ -2,12 +2,26 @@ package service
 
 import (
 	"context"
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
 	"log"
 	"time"
 
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
+// generateRequestID generates a unique request ID for concurrency slot tracking
+// Uses 8 random bytes (16 hex chars) for uniqueness
+func generateRequestID() string {
+	b := make([]byte, 8)
+	if _, err := rand.Read(b); err != nil {
+		// Fallback to nanosecond timestamp (extremely rare case)
+		return fmt.Sprintf("%x", time.Now().UnixNano())
+	}
+	return hex.EncodeToString(b)
+}
+
 const (
 	// Default extra wait slots beyond concurrency limit
 	defaultExtraWaitSlots = 20
@@ -41,7 +55,10 @@ func (s *ConcurrencyService) AcquireAccountSlot(ctx context.Context, accountID i
 		}, nil
 	}
 
-	acquired, err := s.cache.AcquireAccountSlot(ctx, accountID, maxConcurrency)
+	// Generate unique request ID for this slot
+	requestID := generateRequestID()
+
+	acquired, err := s.cache.AcquireAccountSlot(ctx, accountID, maxConcurrency, requestID)
 	if err != nil {
 		return nil, err
 	}
@@ -52,8 +69,8 @@ func (s *ConcurrencyService) AcquireAccountSlot(ctx context.Context, accountID i
 			ReleaseFunc: func() {
 				bgCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 				defer cancel()
-				if err := s.cache.ReleaseAccountSlot(bgCtx, accountID); err != nil {
+				if err := s.cache.ReleaseAccountSlot(bgCtx, accountID, requestID); err != nil {
-					log.Printf("Warning: failed to release account slot for %d: %v", accountID, err)
+					log.Printf("Warning: failed to release account slot for %d (req=%s): %v", accountID, requestID, err)
 				}
 			},
 		}, nil
@@ -77,7 +94,10 @@ func (s *ConcurrencyService) AcquireUserSlot(ctx context.Context, userID int64,
 		}, nil
 	}
 
-	acquired, err := s.cache.AcquireUserSlot(ctx, userID, maxConcurrency)
+	// Generate unique request ID for this slot
+	requestID := generateRequestID()
+
+	acquired, err := s.cache.AcquireUserSlot(ctx, userID, maxConcurrency, requestID)
 	if err != nil {
 		return nil, err
 	}
@@ -88,8 +108,8 @@ func (s *ConcurrencyService) AcquireUserSlot(ctx context.Context, userID int64,
 			ReleaseFunc: func() {
 				bgCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 				defer cancel()
-				if err := s.cache.ReleaseUserSlot(bgCtx, userID); err != nil {
+				if err := s.cache.ReleaseUserSlot(bgCtx, userID, requestID); err != nil {
-					log.Printf("Warning: failed to release user slot for %d: %v", userID, err)
+					log.Printf("Warning: failed to release user slot for %d (req=%s): %v", userID, requestID, err)
 				}
 			},
 		}, nil
@@ -147,3 +167,20 @@ func CalculateMaxWait(userConcurrency int) int {
 	}
 	return userConcurrency + defaultExtraWaitSlots
 }
+
+// GetAccountConcurrencyBatch gets current concurrency counts for multiple accounts
+// Returns a map of accountID -> current concurrency count
+func (s *ConcurrencyService) GetAccountConcurrencyBatch(ctx context.Context, accountIDs []int64) (map[int64]int, error) {
+	result := make(map[int64]int)
+
+	for _, accountID := range accountIDs {
+		count, err := s.cache.GetAccountConcurrency(ctx, accountID)
+		if err != nil {
+			// If key doesn't exist in Redis, count is 0
+			count = 0
+		}
+		result[accountID] = count
+	}
+
+	return result, nil
+}

backend/internal/service/dashboard_service.go

@@ -0,0 +1,77 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/pkg/usagestats"
+	"github.com/Wei-Shaw/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/email_service.go

@@ -6,11 +6,11 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
+	"github.com/Wei-Shaw/sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 	"math/big"
 	"net/smtp"
 	"strconv"
-	"sub2api/internal/model"
-	"sub2api/internal/service/ports"
 	"time"
 )
 

backend/internal/service/gateway_service.go

@@ -16,10 +16,10 @@ import (
 	"strings"
 	"time"
 
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/claude"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/claude"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/gin-gonic/gin"
 )
@@ -358,6 +358,25 @@ func (s *GatewayService) getOAuthToken(ctx context.Context, account *model.Accou
 	return accessToken, "oauth", nil
 }
 
+// 重试相关常量
+const (
+	maxRetries = 3               // 最大重试次数
+	retryDelay = 2 * time.Second // 重试等待时间
+)
+
+// shouldRetryUpstreamError 判断是否应该重试上游错误
+// OAuth/Setup Token 账号：仅 403 重试
+// API Key 账号：未配置的错误码重试
+func (s *GatewayService) shouldRetryUpstreamError(account *model.Account, statusCode int) bool {
+	// OAuth/Setup Token 账号：仅 403 重试
+	if account.IsOAuth() {
+		return statusCode == 403
+	}
+
+	// API Key 账号：未配置的错误码重试
+	return !account.ShouldHandleErrorCode(statusCode)
+}
+
 // Forward 转发请求到Claude API
 func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *model.Account, body []byte) (*ForwardResult, error) {
 	startTime := time.Now()
@@ -389,26 +408,51 @@ func (s *GatewayService) Forward(ctx context.Context, c *gin.Context, account *m
 		return nil, err
 	}
 
-	// 构建上游请求
-	upstreamReq, err := s.buildUpstreamRequest(ctx, c, account, body, token, tokenType)
-	if err != nil {
-		return nil, err
-	}
-
 	// 获取代理URL
 	proxyURL := ""
 	if account.ProxyID != nil && account.Proxy != nil {
 		proxyURL = account.Proxy.URL()
 	}
 
-	// 发送请求
+	// 重试循环
-	resp, err := s.httpUpstream.Do(upstreamReq, proxyURL)
+	var resp *http.Response
-	if err != nil {
+	for attempt := 1; attempt <= maxRetries; attempt++ {
-		return nil, fmt.Errorf("upstream request failed: %w", err)
+		// 构建上游请求（每次重试需要重新构建，因为请求体需要重新读取）
+		upstreamReq, err := s.buildUpstreamRequest(ctx, c, account, body, token, tokenType)
+		if err != nil {
+			return nil, err
+		}
+
+		// 发送请求
+		resp, err = s.httpUpstream.Do(upstreamReq, proxyURL)
+		if err != nil {
+			return nil, fmt.Errorf("upstream request failed: %w", err)
+		}
+
+		// 检查是否需要重试
+		if resp.StatusCode >= 400 && s.shouldRetryUpstreamError(account, resp.StatusCode) {
+			if attempt < maxRetries {
+				log.Printf("Account %d: upstream error %d, retry %d/%d after %v",
+					account.ID, resp.StatusCode, attempt, maxRetries, retryDelay)
+				_ = resp.Body.Close()
+				time.Sleep(retryDelay)
+				continue
+			}
+			// 最后一次尝试也失败，跳出循环处理重试耗尽
+			break
+		}
+
+		// 不需要重试（成功或不可重试的错误），跳出循环
+		break
 	}
 	defer func() { _ = resp.Body.Close() }()
 
-	// 处理错误响应（包括401，由后台TokenRefreshService维护token有效性）
+	// 处理重试耗尽的情况
+	if resp.StatusCode >= 400 && s.shouldRetryUpstreamError(account, resp.StatusCode) {
+		return s.handleRetryExhaustedError(ctx, resp, c, account)
+	}
+
+	// 处理错误响应（不可重试的错误）
 	if resp.StatusCode >= 400 {
 		return s.handleErrorResponse(ctx, resp, c, account)
 	}
@@ -570,19 +614,6 @@ func (s *GatewayService) getBetaHeader(body []byte, clientBetaHeader string) str
 func (s *GatewayService) handleErrorResponse(ctx context.Context, resp *http.Response, c *gin.Context, account *model.Account) (*ForwardResult, error) {
 	body, _ := io.ReadAll(resp.Body)
 
-	// apikey 类型账号：检查自定义错误码配置
-	// 如果启用且错误码不在列表中，返回通用 500 错误（不做任何账号状态处理）
-	if !account.ShouldHandleErrorCode(resp.StatusCode) {
-		c.JSON(http.StatusInternalServerError, gin.H{
-			"type": "error",
-			"error": gin.H{
-				"type":    "upstream_error",
-				"message": "Upstream gateway error",
-			},
-		})
-		return nil, fmt.Errorf("upstream error: %d (not in custom error codes)", resp.StatusCode)
-	}
-
 	// 处理上游错误，标记账号状态
 	s.rateLimitService.HandleUpstreamError(ctx, account, resp.StatusCode, resp.Header, body)
 
@@ -629,6 +660,34 @@ func (s *GatewayService) handleErrorResponse(ctx context.Context, resp *http.Res
 	return nil, fmt.Errorf("upstream error: %d", resp.StatusCode)
 }
 
+// handleRetryExhaustedError 处理重试耗尽后的错误
+// OAuth 403：标记账号异常
+// API Key 未配置错误码：仅返回错误，不标记账号
+func (s *GatewayService) handleRetryExhaustedError(ctx context.Context, resp *http.Response, c *gin.Context, account *model.Account) (*ForwardResult, error) {
+	body, _ := io.ReadAll(resp.Body)
+	statusCode := resp.StatusCode
+
+	// OAuth/Setup Token 账号的 403：标记账号异常
+	if account.IsOAuth() && statusCode == 403 {
+		s.rateLimitService.HandleUpstreamError(ctx, account, statusCode, resp.Header, body)
+		log.Printf("Account %d: marked as error after %d retries for status %d", account.ID, maxRetries, statusCode)
+	} else {
+		// API Key 未配置错误码：不标记账号状态
+		log.Printf("Account %d: upstream error %d after %d retries (not marking account)", account.ID, statusCode, maxRetries)
+	}
+
+	// 返回统一的重试耗尽错误响应
+	c.JSON(http.StatusBadGateway, gin.H{
+		"type": "error",
+		"error": gin.H{
+			"type":    "upstream_error",
+			"message": "Upstream request failed after retries",
+		},
+	})
+
+	return nil, fmt.Errorf("upstream error: %d (retries exhausted)", statusCode)
+}
+
 // streamingResult 流式响应结果
 type streamingResult struct {
 	usage        *ClaudeUsage

backend/internal/service/group_service.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"gorm.io/gorm"
 )

backend/internal/service/identity_service.go

@@ -7,11 +7,11 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 	"log"
 	"net/http"
 	"regexp"
 	"strconv"
-	"sub2api/internal/service/ports"
 	"time"
 )
 

backend/internal/service/oauth_service.go

@@ -6,9 +6,9 @@ import (
 	"log"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/oauth"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/oauth"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 // ClaudeOAuthClient handles HTTP requests for Claude OAuth flows

backend/internal/service/openai_gateway_service.go

@@ -15,9 +15,9 @@ import (
 	"strings"
 	"time"
 
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/gin-gonic/gin"
 )

backend/internal/service/openai_oauth_service.go

@@ -5,9 +5,9 @@ import (
 	"fmt"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 // OpenAIOAuthService handles OpenAI OAuth authentication flows

backend/internal/service/ports/account.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 )
 
 type AccountRepository interface {

backend/internal/service/ports/api_key.go

@@ -3,8 +3,8 @@ package ports
 import (
 	"context"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 )
 
 type ApiKeyRepository interface {

backend/internal/service/ports/concurrency_cache.go

@@ -3,17 +3,21 @@ package ports
 import "context"
 
 // ConcurrencyCache defines cache operations for concurrency service
+// Uses independent keys per request slot with native Redis TTL for automatic cleanup
 type ConcurrencyCache interface {
-	// Slot management
+	// Account slot management - each slot is a separate key with independent TTL
-	AcquireAccountSlot(ctx context.Context, accountID int64, maxConcurrency int) (bool, error)
+	// Key format: concurrency:account:{accountID}:{requestID}
-	ReleaseAccountSlot(ctx context.Context, accountID int64) error
+	AcquireAccountSlot(ctx context.Context, accountID int64, maxConcurrency int, requestID string) (bool, error)
+	ReleaseAccountSlot(ctx context.Context, accountID int64, requestID string) error
 	GetAccountConcurrency(ctx context.Context, accountID int64) (int, error)
 
-	AcquireUserSlot(ctx context.Context, userID int64, maxConcurrency int) (bool, error)
+	// User slot management - each slot is a separate key with independent TTL
-	ReleaseUserSlot(ctx context.Context, userID int64) error
+	// Key format: concurrency:user:{userID}:{requestID}
+	AcquireUserSlot(ctx context.Context, userID int64, maxConcurrency int, requestID string) (bool, error)
+	ReleaseUserSlot(ctx context.Context, userID int64, requestID string) error
 	GetUserConcurrency(ctx context.Context, userID int64) (int, error)
 
-	// Wait queue
+	// Wait queue - uses counter with TTL set only on creation
 	IncrementWaitCount(ctx context.Context, userID int64, maxWait int) (bool, error)
 	DecrementWaitCount(ctx context.Context, userID int64) error
 }

backend/internal/service/ports/group.go

@@ -3,8 +3,8 @@ package ports
 import (
 	"context"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 
 	"gorm.io/gorm"
 )

backend/internal/service/ports/openai_oauth.go

@@ -3,7 +3,7 @@ package ports
 import (
 	"context"
 
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
 )
 
 // OpenAIOAuthClient interface for OpenAI OAuth operations

backend/internal/service/ports/proxy.go

@@ -3,8 +3,8 @@ package ports
 import (
 	"context"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 )
 
 type ProxyRepository interface {

backend/internal/service/ports/redeem_code.go

@@ -3,8 +3,8 @@ package ports
 import (
 	"context"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 )
 
 type RedeemCodeRepository interface {

backend/internal/service/ports/setting.go

@@ -3,7 +3,7 @@ package ports
 import (
 	"context"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
 )
 
 type SettingRepository interface {

backend/internal/service/ports/usage_log.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/pkg/usagestats"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/usagestats"
 )
 
 type UsageLogRepository interface {
@@ -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/ports/user.go

@@ -3,8 +3,8 @@ package ports
 import (
 	"context"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 )
 
 type UserRepository interface {

backend/internal/service/ports/user_subscription.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 )
 
 type UserSubscriptionRepository interface {

backend/internal/service/pricing_service.go

@@ -14,8 +14,8 @@ import (
 	"sync"
 	"time"
 
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/pkg/openai"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/openai"
 )
 
 // LiteLLMModelPricing LiteLLM价格数据结构

backend/internal/service/proxy_service.go

@@ -4,9 +4,9 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"gorm.io/gorm"
 )

backend/internal/service/ratelimit_service.go

@@ -7,9 +7,9 @@ import (
 	"strconv"
 	"time"
 
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 // RateLimitService 处理限流和过载状态管理

backend/internal/service/redeem_service.go

@@ -6,10 +6,10 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
+	"github.com/Wei-Shaw/sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 	"strings"
-	"sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
-	"sub2api/internal/service/ports"
 	"time"
 
 	"github.com/redis/go-redis/v9"

backend/internal/service/setting_service.go

@@ -6,10 +6,10 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 	"strconv"
-	"sub2api/internal/config"
-	"sub2api/internal/model"
-	"sub2api/internal/service/ports"
 
 	"gorm.io/gorm"
 )
@@ -54,6 +54,7 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*model.PublicSe
 		model.SettingKeySiteSubtitle,
 		model.SettingKeyApiBaseUrl,
 		model.SettingKeyContactInfo,
+		model.SettingKeyDocUrl,
 	}
 
 	settings, err := s.settingRepo.GetMultiple(ctx, keys)
@@ -71,6 +72,7 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*model.PublicSe
 		SiteSubtitle:        s.getStringOrDefault(settings, model.SettingKeySiteSubtitle, "Subscription to API Conversion Platform"),
 		ApiBaseUrl:          settings[model.SettingKeyApiBaseUrl],
 		ContactInfo:         settings[model.SettingKeyContactInfo],
+		DocUrl:              settings[model.SettingKeyDocUrl],
 	}, nil
 }
 
@@ -106,6 +108,7 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *model.Sys
 	updates[model.SettingKeySiteSubtitle] = settings.SiteSubtitle
 	updates[model.SettingKeyApiBaseUrl] = settings.ApiBaseUrl
 	updates[model.SettingKeyContactInfo] = settings.ContactInfo
+	updates[model.SettingKeyDocUrl] = settings.DocUrl
 
 	// 默认配置
 	updates[model.SettingKeyDefaultConcurrency] = strconv.Itoa(settings.DefaultConcurrency)
@@ -210,6 +213,7 @@ func (s *SettingService) parseSettings(settings map[string]string) *model.System
 		SiteSubtitle:        s.getStringOrDefault(settings, model.SettingKeySiteSubtitle, "Subscription to API Conversion Platform"),
 		ApiBaseUrl:          settings[model.SettingKeyApiBaseUrl],
 		ContactInfo:         settings[model.SettingKeyContactInfo],
+		DocUrl:              settings[model.SettingKeyDocUrl],
 	}
 
 	// 解析整数类型

backend/internal/service/subscription_service.go

@@ -7,9 +7,9 @@ import (
 	"log"
 	"time"
 
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 var (

backend/internal/service/token_refresh_service.go

@@ -7,9 +7,9 @@ import (
 	"sync"
 	"time"
 
-	"sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/config"
-	"sub2api/internal/model"
+	"github.com/Wei-Shaw/sub2api/internal/model"
-	"sub2api/internal/service/ports"
+	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 // TokenRefreshService OAuth token自动刷新服务