Merge pull request #300 from mt21625457/main

feat(网关): 引入 OpenAI/Claude OAuth token 缓存

.gitignore

@@ -129,3 +129,4 @@ deploy/docker-compose.override.yml
 .gocache/
 vite.config.js
 docs/*
+.serena/
\ No newline at end of file

backend/cmd/server/wire_gen.go

@@ -100,8 +100,8 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	tempUnschedCache := repository.NewTempUnschedCache(redisClient)
 	timeoutCounterCache := repository.NewTimeoutCounterCache(redisClient)
 	geminiTokenCache := repository.NewGeminiTokenCache(redisClient)
-	tokenCacheInvalidator := service.NewCompositeTokenCacheInvalidator(geminiTokenCache)
-	rateLimitService := service.ProvideRateLimitService(accountRepository, usageLogRepository, configConfig, geminiQuotaService, tempUnschedCache, timeoutCounterCache, settingService, tokenCacheInvalidator)
+	compositeTokenCacheInvalidator := service.NewCompositeTokenCacheInvalidator(geminiTokenCache)
+	rateLimitService := service.ProvideRateLimitService(accountRepository, usageLogRepository, configConfig, geminiQuotaService, tempUnschedCache, timeoutCounterCache, settingService, compositeTokenCacheInvalidator)
 	claudeUsageFetcher := repository.NewClaudeUsageFetcher()
 	antigravityQuotaFetcher := service.NewAntigravityQuotaFetcher(proxyRepository)
 	usageCache := service.NewUsageCache()
@@ -136,8 +136,10 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	identityCache := repository.NewIdentityCache(redisClient)
 	identityService := service.NewIdentityService(identityCache)
 	deferredService := service.ProvideDeferredService(accountRepository, timingWheelService)
-	gatewayService := service.NewGatewayService(accountRepository, groupRepository, usageLogRepository, userRepository, userSubscriptionRepository, gatewayCache, configConfig, schedulerSnapshotService, concurrencyService, billingService, rateLimitService, billingCacheService, identityService, httpUpstream, deferredService)
-	openAIGatewayService := service.NewOpenAIGatewayService(accountRepository, usageLogRepository, userRepository, userSubscriptionRepository, gatewayCache, configConfig, schedulerSnapshotService, concurrencyService, billingService, rateLimitService, billingCacheService, httpUpstream, deferredService)
+	claudeTokenProvider := service.NewClaudeTokenProvider(accountRepository, geminiTokenCache, oAuthService)
+	gatewayService := service.NewGatewayService(accountRepository, groupRepository, usageLogRepository, userRepository, userSubscriptionRepository, gatewayCache, configConfig, schedulerSnapshotService, concurrencyService, billingService, rateLimitService, billingCacheService, identityService, httpUpstream, deferredService, claudeTokenProvider)
+	openAITokenProvider := service.NewOpenAITokenProvider(accountRepository, geminiTokenCache, openAIOAuthService)
+	openAIGatewayService := service.NewOpenAIGatewayService(accountRepository, usageLogRepository, userRepository, userSubscriptionRepository, gatewayCache, configConfig, schedulerSnapshotService, concurrencyService, billingService, rateLimitService, billingCacheService, httpUpstream, deferredService, openAITokenProvider)
 	geminiMessagesCompatService := service.NewGeminiMessagesCompatService(accountRepository, groupRepository, gatewayCache, schedulerSnapshotService, geminiTokenProvider, rateLimitService, httpUpstream, antigravityGatewayService, configConfig)
 	opsService := service.NewOpsService(opsRepository, settingRepository, configConfig, accountRepository, concurrencyService, gatewayService, openAIGatewayService, geminiMessagesCompatService, antigravityGatewayService)
 	settingHandler := admin.NewSettingHandler(settingService, emailService, turnstileService, opsService)
@@ -168,7 +170,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	opsAlertEvaluatorService := service.ProvideOpsAlertEvaluatorService(opsService, opsRepository, emailService, redisClient, configConfig)
 	opsCleanupService := service.ProvideOpsCleanupService(opsRepository, db, redisClient, configConfig)
 	opsScheduledReportService := service.ProvideOpsScheduledReportService(opsService, userService, emailService, redisClient, configConfig)
-	tokenRefreshService := service.ProvideTokenRefreshService(accountRepository, oAuthService, openAIOAuthService, geminiOAuthService, antigravityOAuthService, tokenCacheInvalidator, configConfig)
+	tokenRefreshService := service.ProvideTokenRefreshService(accountRepository, oAuthService, openAIOAuthService, geminiOAuthService, antigravityOAuthService, compositeTokenCacheInvalidator, configConfig)
 	accountExpiryService := service.ProvideAccountExpiryService(accountRepository)
 	v := provideCleanup(client, redisClient, opsMetricsCollector, opsAggregationService, opsAlertEvaluatorService, opsCleanupService, opsScheduledReportService, schedulerSnapshotService, tokenRefreshService, accountExpiryService, pricingService, emailQueueService, billingCacheService, oAuthService, openAIOAuthService, geminiOAuthService, antigravityOAuthService)
 	application := &Application{

backend/internal/repository/gemini_token_cache.go

@@ -11,8 +11,8 @@ import (
 )
 
 const (
-	geminiTokenKeyPrefix       = "gemini:token:"
-	geminiRefreshLockKeyPrefix = "gemini:refresh_lock:"
+	oauthTokenKeyPrefix       = "oauth:token:"
+	oauthRefreshLockKeyPrefix = "oauth:refresh_lock:"
 )
 
 type geminiTokenCache struct {
@@ -24,26 +24,26 @@ func NewGeminiTokenCache(rdb *redis.Client) service.GeminiTokenCache {
 }
 
 func (c *geminiTokenCache) GetAccessToken(ctx context.Context, cacheKey string) (string, error) {
-	key := fmt.Sprintf("%s%s", geminiTokenKeyPrefix, cacheKey)
+	key := fmt.Sprintf("%s%s", oauthTokenKeyPrefix, cacheKey)
 	return c.rdb.Get(ctx, key).Result()
 }
 
 func (c *geminiTokenCache) SetAccessToken(ctx context.Context, cacheKey string, token string, ttl time.Duration) error {
-	key := fmt.Sprintf("%s%s", geminiTokenKeyPrefix, cacheKey)
+	key := fmt.Sprintf("%s%s", oauthTokenKeyPrefix, cacheKey)
 	return c.rdb.Set(ctx, key, token, ttl).Err()
 }
 
 func (c *geminiTokenCache) DeleteAccessToken(ctx context.Context, cacheKey string) error {
-	key := fmt.Sprintf("%s%s", geminiTokenKeyPrefix, cacheKey)
+	key := fmt.Sprintf("%s%s", oauthTokenKeyPrefix, cacheKey)
 	return c.rdb.Del(ctx, key).Err()
 }
 
 func (c *geminiTokenCache) AcquireRefreshLock(ctx context.Context, cacheKey string, ttl time.Duration) (bool, error) {
-	key := fmt.Sprintf("%s%s", geminiRefreshLockKeyPrefix, cacheKey)
+	key := fmt.Sprintf("%s%s", oauthRefreshLockKeyPrefix, cacheKey)
 	return c.rdb.SetNX(ctx, key, 1, ttl).Result()
 }
 
 func (c *geminiTokenCache) ReleaseRefreshLock(ctx context.Context, cacheKey string) error {
-	key := fmt.Sprintf("%s%s", geminiRefreshLockKeyPrefix, cacheKey)
+	key := fmt.Sprintf("%s%s", oauthRefreshLockKeyPrefix, cacheKey)
 	return c.rdb.Del(ctx, key).Err()
 }

backend/internal/service/claude_token_provider.go

+package service
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	claudeTokenRefreshSkew = 3 * time.Minute
+	claudeTokenCacheSkew   = 5 * time.Minute
+	claudeLockWaitTime     = 200 * time.Millisecond
+)
+
+// ClaudeTokenCache Token 缓存接口（复用 GeminiTokenCache 接口定义）
+type ClaudeTokenCache = GeminiTokenCache
+
+// ClaudeTokenProvider 管理 Claude (Anthropic) OAuth 账户的 access_token
+type ClaudeTokenProvider struct {
+	accountRepo  AccountRepository
+	tokenCache   ClaudeTokenCache
+	oauthService *OAuthService
+}
+
+func NewClaudeTokenProvider(
+	accountRepo AccountRepository,
+	tokenCache ClaudeTokenCache,
+	oauthService *OAuthService,
+) *ClaudeTokenProvider {
+	return &ClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   tokenCache,
+		oauthService: oauthService,
+	}
+}
+
+// GetAccessToken 获取有效的 access_token
+func (p *ClaudeTokenProvider) GetAccessToken(ctx context.Context, account *Account) (string, error) {
+	if account == nil {
+		return "", errors.New("account is nil")
+	}
+	if account.Platform != PlatformAnthropic || account.Type != AccountTypeOAuth {
+		return "", errors.New("not an anthropic oauth account")
+	}
+
+	cacheKey := ClaudeTokenCacheKey(account)
+
+	// 1. 先尝试缓存
+	if p.tokenCache != nil {
+		if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+			slog.Debug("claude_token_cache_hit", "account_id", account.ID)
+			return token, nil
+		} else if err != nil {
+			slog.Warn("claude_token_cache_get_failed", "account_id", account.ID, "error", err)
+		}
+	}
+
+	slog.Debug("claude_token_cache_miss", "account_id", account.ID)
+
+	// 2. 如果即将过期则刷新
+	expiresAt := account.GetCredentialAsTime("expires_at")
+	needsRefresh := expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew
+	refreshFailed := false
+	if needsRefresh && p.tokenCache != nil {
+		locked, lockErr := p.tokenCache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
+		if lockErr == nil && locked {
+			defer func() { _ = p.tokenCache.ReleaseRefreshLock(ctx, cacheKey) }()
+
+			// 拿到锁后再次检查缓存（另一个 worker 可能已刷新）
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+				return token, nil
+			}
+
+			// 从数据库获取最新账户信息
+			fresh, err := p.accountRepo.GetByID(ctx, account.ID)
+			if err == nil && fresh != nil {
+				account = fresh
+			}
+			expiresAt = account.GetCredentialAsTime("expires_at")
+			if expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew {
+				if p.oauthService == nil {
+					slog.Warn("claude_oauth_service_not_configured", "account_id", account.ID)
+					refreshFailed = true // 无法刷新，标记失败
+				} else {
+					tokenInfo, err := p.oauthService.RefreshAccountToken(ctx, account)
+					if err != nil {
+						// 刷新失败时记录警告，但不立即返回错误，尝试使用现有 token
+						slog.Warn("claude_token_refresh_failed", "account_id", account.ID, "error", err)
+						refreshFailed = true // 刷新失败，标记以使用短 TTL
+					} else {
+						// 构建新 credentials，保留原有字段
+						newCredentials := make(map[string]any)
+						for k, v := range account.Credentials {
+							newCredentials[k] = v
+						}
+						newCredentials["access_token"] = tokenInfo.AccessToken
+						newCredentials["token_type"] = tokenInfo.TokenType
+						newCredentials["expires_in"] = strconv.FormatInt(tokenInfo.ExpiresIn, 10)
+						newCredentials["expires_at"] = strconv.FormatInt(tokenInfo.ExpiresAt, 10)
+						if tokenInfo.RefreshToken != "" {
+							newCredentials["refresh_token"] = tokenInfo.RefreshToken
+						}
+						if tokenInfo.Scope != "" {
+							newCredentials["scope"] = tokenInfo.Scope
+						}
+						account.Credentials = newCredentials
+						if updateErr := p.accountRepo.Update(ctx, account); updateErr != nil {
+							slog.Error("claude_token_provider_update_failed", "account_id", account.ID, "error", updateErr)
+						}
+						expiresAt = account.GetCredentialAsTime("expires_at")
+					}
+				}
+			}
+		} else if lockErr != nil {
+			// Redis 错误导致无法获取锁，降级为无锁刷新（仅在 token 接近过期时）
+			slog.Warn("claude_token_lock_failed_degraded_refresh", "account_id", account.ID, "error", lockErr)
+
+			// 检查 ctx 是否已取消
+			if ctx.Err() != nil {
+				return "", ctx.Err()
+			}
+
+			// 从数据库获取最新账户信息
+			if p.accountRepo != nil {
+				fresh, err := p.accountRepo.GetByID(ctx, account.ID)
+				if err == nil && fresh != nil {
+					account = fresh
+				}
+			}
+			expiresAt = account.GetCredentialAsTime("expires_at")
+
+			// 仅在 expires_at 已过期/接近过期时才执行无锁刷新
+			if expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew {
+				if p.oauthService == nil {
+					slog.Warn("claude_oauth_service_not_configured", "account_id", account.ID)
+					refreshFailed = true
+				} else {
+					tokenInfo, err := p.oauthService.RefreshAccountToken(ctx, account)
+					if err != nil {
+						slog.Warn("claude_token_refresh_failed_degraded", "account_id", account.ID, "error", err)
+						refreshFailed = true
+					} else {
+						// 构建新 credentials，保留原有字段
+						newCredentials := make(map[string]any)
+						for k, v := range account.Credentials {
+							newCredentials[k] = v
+						}
+						newCredentials["access_token"] = tokenInfo.AccessToken
+						newCredentials["token_type"] = tokenInfo.TokenType
+						newCredentials["expires_in"] = strconv.FormatInt(tokenInfo.ExpiresIn, 10)
+						newCredentials["expires_at"] = strconv.FormatInt(tokenInfo.ExpiresAt, 10)
+						if tokenInfo.RefreshToken != "" {
+							newCredentials["refresh_token"] = tokenInfo.RefreshToken
+						}
+						if tokenInfo.Scope != "" {
+							newCredentials["scope"] = tokenInfo.Scope
+						}
+						account.Credentials = newCredentials
+						if updateErr := p.accountRepo.Update(ctx, account); updateErr != nil {
+							slog.Error("claude_token_provider_update_failed", "account_id", account.ID, "error", updateErr)
+						}
+						expiresAt = account.GetCredentialAsTime("expires_at")
+					}
+				}
+			}
+		} else {
+			// 锁获取失败（被其他 worker 持有），等待 200ms 后重试读取缓存
+			time.Sleep(claudeLockWaitTime)
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+				slog.Debug("claude_token_cache_hit_after_wait", "account_id", account.ID)
+				return token, nil
+			}
+		}
+	}
+
+	accessToken := account.GetCredential("access_token")
+	if strings.TrimSpace(accessToken) == "" {
+		return "", errors.New("access_token not found in credentials")
+	}
+
+	// 3. 存入缓存
+	if p.tokenCache != nil {
+		ttl := 30 * time.Minute
+		if refreshFailed {
+			// 刷新失败时使用短 TTL，避免失效 token 长时间缓存导致 401 抖动
+			ttl = time.Minute
+			slog.Debug("claude_token_cache_short_ttl", "account_id", account.ID, "reason", "refresh_failed")
+		} else if expiresAt != nil {
+			until := time.Until(*expiresAt)
+			switch {
+			case until > claudeTokenCacheSkew:
+				ttl = until - claudeTokenCacheSkew
+			case until > 0:
+				ttl = until
+			default:
+				ttl = time.Minute
+			}
+		}
+		if err := p.tokenCache.SetAccessToken(ctx, cacheKey, accessToken, ttl); err != nil {
+			slog.Warn("claude_token_cache_set_failed", "account_id", account.ID, "error", err)
+		}
+	}
+
+	return accessToken, nil
+}

backend/internal/service/claude_token_provider_test.go

+//go:build unit
+
+package service
+
+import (
+	"context"
+	"errors"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+// claudeTokenCacheStub implements ClaudeTokenCache for testing
+type claudeTokenCacheStub struct {
+	mu               sync.Mutex
+	tokens           map[string]string
+	getErr           error
+	setErr           error
+	deleteErr        error
+	lockAcquired     bool
+	lockErr          error
+	releaseLockErr   error
+	getCalled        int32
+	setCalled        int32
+	lockCalled       int32
+	unlockCalled     int32
+	simulateLockRace bool
+}
+
+func newClaudeTokenCacheStub() *claudeTokenCacheStub {
+	return &claudeTokenCacheStub{
+		tokens:       make(map[string]string),
+		lockAcquired: true,
+	}
+}
+
+func (s *claudeTokenCacheStub) GetAccessToken(ctx context.Context, cacheKey string) (string, error) {
+	atomic.AddInt32(&s.getCalled, 1)
+	if s.getErr != nil {
+		return "", s.getErr
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.tokens[cacheKey], nil
+}
+
+func (s *claudeTokenCacheStub) SetAccessToken(ctx context.Context, cacheKey string, token string, ttl time.Duration) error {
+	atomic.AddInt32(&s.setCalled, 1)
+	if s.setErr != nil {
+		return s.setErr
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.tokens[cacheKey] = token
+	return nil
+}
+
+func (s *claudeTokenCacheStub) DeleteAccessToken(ctx context.Context, cacheKey string) error {
+	if s.deleteErr != nil {
+		return s.deleteErr
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	delete(s.tokens, cacheKey)
+	return nil
+}
+
+func (s *claudeTokenCacheStub) AcquireRefreshLock(ctx context.Context, cacheKey string, ttl time.Duration) (bool, error) {
+	atomic.AddInt32(&s.lockCalled, 1)
+	if s.lockErr != nil {
+		return false, s.lockErr
+	}
+	if s.simulateLockRace {
+		return false, nil
+	}
+	return s.lockAcquired, nil
+}
+
+func (s *claudeTokenCacheStub) ReleaseRefreshLock(ctx context.Context, cacheKey string) error {
+	atomic.AddInt32(&s.unlockCalled, 1)
+	return s.releaseLockErr
+}
+
+// claudeAccountRepoStub is a minimal stub implementing only the methods used by ClaudeTokenProvider
+type claudeAccountRepoStub struct {
+	account      *Account
+	getErr       error
+	updateErr    error
+	getCalled    int32
+	updateCalled int32
+}
+
+func (r *claudeAccountRepoStub) GetByID(ctx context.Context, id int64) (*Account, error) {
+	atomic.AddInt32(&r.getCalled, 1)
+	if r.getErr != nil {
+		return nil, r.getErr
+	}
+	return r.account, nil
+}
+
+func (r *claudeAccountRepoStub) Update(ctx context.Context, account *Account) error {
+	atomic.AddInt32(&r.updateCalled, 1)
+	if r.updateErr != nil {
+		return r.updateErr
+	}
+	r.account = account
+	return nil
+}
+
+// claudeOAuthServiceStub implements OAuthService methods for testing
+type claudeOAuthServiceStub struct {
+	tokenInfo     *TokenInfo
+	refreshErr    error
+	refreshCalled int32
+}
+
+func (s *claudeOAuthServiceStub) RefreshAccountToken(ctx context.Context, account *Account) (*TokenInfo, error) {
+	atomic.AddInt32(&s.refreshCalled, 1)
+	if s.refreshErr != nil {
+		return nil, s.refreshErr
+	}
+	return s.tokenInfo, nil
+}
+
+// testClaudeTokenProvider is a test version that uses the stub OAuth service
+type testClaudeTokenProvider struct {
+	accountRepo  *claudeAccountRepoStub
+	tokenCache   *claudeTokenCacheStub
+	oauthService *claudeOAuthServiceStub
+}
+
+func (p *testClaudeTokenProvider) GetAccessToken(ctx context.Context, account *Account) (string, error) {
+	if account == nil {
+		return "", errors.New("account is nil")
+	}
+	if account.Platform != PlatformAnthropic || account.Type != AccountTypeOAuth {
+		return "", errors.New("not an anthropic oauth account")
+	}
+
+	cacheKey := ClaudeTokenCacheKey(account)
+
+	// 1. Check cache
+	if p.tokenCache != nil {
+		if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && token != "" {
+			return token, nil
+		}
+	}
+
+	// 2. Check if refresh needed
+	expiresAt := account.GetCredentialAsTime("expires_at")
+	needsRefresh := expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew
+	refreshFailed := false
+	if needsRefresh && p.tokenCache != nil {
+		locked, err := p.tokenCache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
+		if err == nil && locked {
+			defer func() { _ = p.tokenCache.ReleaseRefreshLock(ctx, cacheKey) }()
+
+			// Check cache again after acquiring lock
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && token != "" {
+				return token, nil
+			}
+
+			// Get fresh account from DB
+			fresh, err := p.accountRepo.GetByID(ctx, account.ID)
+			if err == nil && fresh != nil {
+				account = fresh
+			}
+			expiresAt = account.GetCredentialAsTime("expires_at")
+			if expiresAt == nil || time.Until(*expiresAt) <= claudeTokenRefreshSkew {
+				if p.oauthService == nil {
+					refreshFailed = true // 无法刷新，标记失败
+				} else {
+					tokenInfo, err := p.oauthService.RefreshAccountToken(ctx, account)
+					if err != nil {
+						refreshFailed = true // 刷新失败，标记以使用短 TTL
+					} else {
+						// Build new credentials
+						newCredentials := make(map[string]any)
+						for k, v := range account.Credentials {
+							newCredentials[k] = v
+						}
+						newCredentials["access_token"] = tokenInfo.AccessToken
+						newCredentials["token_type"] = tokenInfo.TokenType
+						newCredentials["expires_at"] = time.Now().Add(time.Duration(tokenInfo.ExpiresIn) * time.Second).Format(time.RFC3339)
+						if tokenInfo.RefreshToken != "" {
+							newCredentials["refresh_token"] = tokenInfo.RefreshToken
+						}
+						account.Credentials = newCredentials
+						_ = p.accountRepo.Update(ctx, account)
+						expiresAt = account.GetCredentialAsTime("expires_at")
+					}
+				}
+			}
+		} else if p.tokenCache.simulateLockRace {
+			// Wait and retry cache
+			time.Sleep(10 * time.Millisecond)
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && token != "" {
+				return token, nil
+			}
+		}
+	}
+
+	accessToken := account.GetCredential("access_token")
+	if accessToken == "" {
+		return "", errors.New("access_token not found in credentials")
+	}
+
+	// 3. Store in cache
+	if p.tokenCache != nil {
+		ttl := 30 * time.Minute
+		if refreshFailed {
+			ttl = time.Minute // 刷新失败时使用短 TTL
+		} else if expiresAt != nil {
+			until := time.Until(*expiresAt)
+			if until > claudeTokenCacheSkew {
+				ttl = until - claudeTokenCacheSkew
+			} else if until > 0 {
+				ttl = until
+			} else {
+				ttl = time.Minute
+			}
+		}
+		_ = p.tokenCache.SetAccessToken(ctx, cacheKey, accessToken, ttl)
+	}
+
+	return accessToken, nil
+}
+
+func TestClaudeTokenProvider_CacheHit(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	account := &Account{
+		ID:       100,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "db-token",
+		},
+	}
+	cacheKey := ClaudeTokenCacheKey(account)
+	cache.tokens[cacheKey] = "cached-token"
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "cached-token", token)
+	require.Equal(t, int32(1), atomic.LoadInt32(&cache.getCalled))
+	require.Equal(t, int32(0), atomic.LoadInt32(&cache.setCalled))
+}
+
+func TestClaudeTokenProvider_CacheMiss_FromCredentials(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	// Token expires in far future, no refresh needed
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       101,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "credential-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "credential-token", token)
+
+	// Should have stored in cache
+	cacheKey := ClaudeTokenCacheKey(account)
+	require.Equal(t, "credential-token", cache.tokens[cacheKey])
+}
+
+func TestClaudeTokenProvider_TokenRefresh(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	accountRepo := &claudeAccountRepoStub{}
+	oauthService := &claudeOAuthServiceStub{
+		tokenInfo: &TokenInfo{
+			AccessToken:  "refreshed-token",
+			RefreshToken: "new-refresh-token",
+			TokenType:    "Bearer",
+			ExpiresIn:    3600,
+			ExpiresAt:    time.Now().Add(time.Hour).Unix(),
+		},
+	}
+
+	// Token expires soon (within refresh skew)
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       102,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token":  "old-token",
+			"refresh_token": "old-refresh-token",
+			"expires_at":    expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	provider := &testClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "refreshed-token", token)
+	require.Equal(t, int32(1), atomic.LoadInt32(&oauthService.refreshCalled))
+}
+
+func TestClaudeTokenProvider_LockRaceCondition(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cache.simulateLockRace = true
+	accountRepo := &claudeAccountRepoStub{}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       103,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "race-token",
+			"expires_at":   expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	// Simulate another worker already refreshed and cached
+	cacheKey := ClaudeTokenCacheKey(account)
+	go func() {
+		time.Sleep(5 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "winner-token"
+		cache.mu.Unlock()
+	}()
+
+	provider := &testClaudeTokenProvider{
+		accountRepo: accountRepo,
+		tokenCache:  cache,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.NotEmpty(t, token)
+}
+
+func TestClaudeTokenProvider_NilAccount(t *testing.T) {
+	provider := NewClaudeTokenProvider(nil, nil, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), nil)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "account is nil")
+	require.Empty(t, token)
+}
+
+func TestClaudeTokenProvider_WrongPlatform(t *testing.T) {
+	provider := NewClaudeTokenProvider(nil, nil, nil)
+	account := &Account{
+		ID:       104,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "not an anthropic oauth account")
+	require.Empty(t, token)
+}
+
+func TestClaudeTokenProvider_WrongAccountType(t *testing.T) {
+	provider := NewClaudeTokenProvider(nil, nil, nil)
+	account := &Account{
+		ID:       105,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeAPIKey,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "not an anthropic oauth account")
+	require.Empty(t, token)
+}
+
+func TestClaudeTokenProvider_SetupTokenType(t *testing.T) {
+	provider := NewClaudeTokenProvider(nil, nil, nil)
+	account := &Account{
+		ID:       106,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeSetupToken,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "not an anthropic oauth account")
+	require.Empty(t, token)
+}
+
+func TestClaudeTokenProvider_NilCache(t *testing.T) {
+	// Token doesn't need refresh
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       107,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "nocache-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, nil, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "nocache-token", token)
+}
+
+func TestClaudeTokenProvider_CacheGetError(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cache.getErr = errors.New("redis connection failed")
+
+	// Token doesn't need refresh
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       108,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "fallback-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+
+	// Should gracefully degrade and return from credentials
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "fallback-token", token)
+}
+
+func TestClaudeTokenProvider_CacheSetError(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cache.setErr = errors.New("redis write failed")
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       109,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "still-works-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+
+	// Should still work even if cache set fails
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "still-works-token", token)
+}
+
+func TestClaudeTokenProvider_MissingAccessToken(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       110,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"expires_at": expiresAt,
+			// missing access_token
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "access_token not found")
+	require.Empty(t, token)
+}
+
+func TestClaudeTokenProvider_RefreshError(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	accountRepo := &claudeAccountRepoStub{}
+	oauthService := &claudeOAuthServiceStub{
+		refreshErr: errors.New("oauth refresh failed"),
+	}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       111,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token":  "old-token",
+			"refresh_token": "old-refresh-token",
+			"expires_at":    expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	provider := &testClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	// Now with fallback behavior, should return existing token even if refresh fails
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "old-token", token) // Fallback to existing token
+}
+
+func TestClaudeTokenProvider_OAuthServiceNotConfigured(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	accountRepo := &claudeAccountRepoStub{}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       112,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "old-token",
+			"expires_at":   expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	provider := &testClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: nil, // not configured
+	}
+
+	// Now with fallback behavior, should return existing token even if oauth service not configured
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "old-token", token) // Fallback to existing token
+}
+
+func TestClaudeTokenProvider_TTLCalculation(t *testing.T) {
+	tests := []struct {
+		name      string
+		expiresIn time.Duration
+	}{
+		{
+			name:      "far_future_expiry",
+			expiresIn: 1 * time.Hour,
+		},
+		{
+			name:      "medium_expiry",
+			expiresIn: 10 * time.Minute,
+		},
+		{
+			name:      "near_expiry",
+			expiresIn: 6 * time.Minute,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cache := newClaudeTokenCacheStub()
+			expiresAt := time.Now().Add(tt.expiresIn).Format(time.RFC3339)
+			account := &Account{
+				ID:       200,
+				Platform: PlatformAnthropic,
+				Type:     AccountTypeOAuth,
+				Credentials: map[string]any{
+					"access_token": "test-token",
+					"expires_at":   expiresAt,
+				},
+			}
+
+			provider := NewClaudeTokenProvider(nil, cache, nil)
+
+			_, err := provider.GetAccessToken(context.Background(), account)
+			require.NoError(t, err)
+
+			// Verify token was cached
+			cacheKey := ClaudeTokenCacheKey(account)
+			require.Equal(t, "test-token", cache.tokens[cacheKey])
+		})
+	}
+}
+
+func TestClaudeTokenProvider_AccountRepoGetError(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	accountRepo := &claudeAccountRepoStub{
+		getErr: errors.New("db connection failed"),
+	}
+	oauthService := &claudeOAuthServiceStub{
+		tokenInfo: &TokenInfo{
+			AccessToken:  "refreshed-token",
+			RefreshToken: "new-refresh",
+			TokenType:    "Bearer",
+			ExpiresIn:    3600,
+		},
+	}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       113,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token":  "old-token",
+			"refresh_token": "old-refresh",
+			"expires_at":    expiresAt,
+		},
+	}
+
+	provider := &testClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	// Should still work, just using the passed-in account
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "refreshed-token", token)
+}
+
+func TestClaudeTokenProvider_AccountUpdateError(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	accountRepo := &claudeAccountRepoStub{
+		updateErr: errors.New("db write failed"),
+	}
+	oauthService := &claudeOAuthServiceStub{
+		tokenInfo: &TokenInfo{
+			AccessToken:  "refreshed-token",
+			RefreshToken: "new-refresh",
+			TokenType:    "Bearer",
+			ExpiresIn:    3600,
+		},
+	}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       114,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token":  "old-token",
+			"refresh_token": "old-refresh",
+			"expires_at":    expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	provider := &testClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	// Should still return token even if update fails
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "refreshed-token", token)
+}
+
+func TestClaudeTokenProvider_RefreshPreservesExistingCredentials(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	accountRepo := &claudeAccountRepoStub{}
+	oauthService := &claudeOAuthServiceStub{
+		tokenInfo: &TokenInfo{
+			AccessToken:  "new-access-token",
+			RefreshToken: "new-refresh-token",
+			TokenType:    "Bearer",
+			ExpiresIn:    3600,
+		},
+	}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       115,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token":   "old-access-token",
+			"refresh_token":  "old-refresh-token",
+			"expires_at":     expiresAt,
+			"custom_field":   "should-be-preserved",
+			"organization":   "test-org",
+		},
+	}
+	accountRepo.account = account
+
+	provider := &testClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "new-access-token", token)
+
+	// Verify existing fields are preserved
+	require.Equal(t, "should-be-preserved", accountRepo.account.Credentials["custom_field"])
+	require.Equal(t, "test-org", accountRepo.account.Credentials["organization"])
+	// Verify new fields are updated
+	require.Equal(t, "new-access-token", accountRepo.account.Credentials["access_token"])
+	require.Equal(t, "new-refresh-token", accountRepo.account.Credentials["refresh_token"])
+}
+
+func TestClaudeTokenProvider_DoubleCheckCacheAfterLock(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	accountRepo := &claudeAccountRepoStub{}
+	oauthService := &claudeOAuthServiceStub{
+		tokenInfo: &TokenInfo{
+			AccessToken:  "refreshed-token",
+			RefreshToken: "new-refresh",
+			TokenType:    "Bearer",
+			ExpiresIn:    3600,
+		},
+	}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       116,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "old-token",
+			"expires_at":   expiresAt,
+		},
+	}
+	accountRepo.account = account
+	cacheKey := ClaudeTokenCacheKey(account)
+
+	// After lock is acquired, cache should have the token (simulating another worker)
+	go func() {
+		time.Sleep(5 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "cached-by-other-worker"
+		cache.mu.Unlock()
+	}()
+
+	provider := &testClaudeTokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.NotEmpty(t, token)
+}
+
+// Tests for real provider - to increase coverage
+func TestClaudeTokenProvider_Real_LockFailedWait(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cache.lockAcquired = false // Lock acquisition fails
+
+	// Token expires soon (within refresh skew) to trigger lock attempt
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       300,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "fallback-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	// Set token in cache after lock wait period (simulate other worker refreshing)
+	cacheKey := ClaudeTokenCacheKey(account)
+	go func() {
+		time.Sleep(100 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "refreshed-by-other"
+		cache.mu.Unlock()
+	}()
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.NotEmpty(t, token)
+}
+
+func TestClaudeTokenProvider_Real_CacheHitAfterWait(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cache.lockAcquired = false // Lock acquisition fails
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       301,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "original-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	cacheKey := ClaudeTokenCacheKey(account)
+	// Set token in cache immediately after wait starts
+	go func() {
+		time.Sleep(50 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "winner-token"
+		cache.mu.Unlock()
+	}()
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.NotEmpty(t, token)
+}
+
+func TestClaudeTokenProvider_Real_NoExpiresAt(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cache.lockAcquired = false // Prevent entering refresh logic
+
+	// Token with nil expires_at (no expiry set)
+	account := &Account{
+		ID:       302,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "no-expiry-token",
+		},
+	}
+
+	// After lock wait, return token from credentials
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "no-expiry-token", token)
+}
+
+func TestClaudeTokenProvider_Real_WhitespaceToken(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cacheKey := "claude:account:303"
+	cache.tokens[cacheKey] = "   " // Whitespace only - should be treated as empty
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       303,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "real-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "real-token", token)
+}
+
+func TestClaudeTokenProvider_Real_EmptyCredentialToken(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       304,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "   ", // Whitespace only
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "access_token not found")
+	require.Empty(t, token)
+}
+
+func TestClaudeTokenProvider_Real_LockError(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+	cache.lockErr = errors.New("redis lock failed")
+
+	// Token expires soon (within refresh skew)
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       305,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "fallback-on-lock-error",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "fallback-on-lock-error", token)
+}
+
+func TestClaudeTokenProvider_Real_NilCredentials(t *testing.T) {
+	cache := newClaudeTokenCacheStub()
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       306,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"expires_at": expiresAt,
+			// No access_token
+		},
+	}
+
+	provider := NewClaudeTokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "access_token not found")
+	require.Empty(t, token)
+}

backend/internal/service/gateway_service.go

@@ -159,6 +159,7 @@ type GatewayService struct {
 	httpUpstream        HTTPUpstream
 	deferredService     *DeferredService
 	concurrencyService  *ConcurrencyService
+	claudeTokenProvider *ClaudeTokenProvider
 }
 
 // NewGatewayService creates a new GatewayService
@@ -178,6 +179,7 @@ func NewGatewayService(
 	identityService *IdentityService,
 	httpUpstream HTTPUpstream,
 	deferredService *DeferredService,
+	claudeTokenProvider *ClaudeTokenProvider,
 ) *GatewayService {
 	return &GatewayService{
 		accountRepo:         accountRepo,
@@ -195,6 +197,7 @@ func NewGatewayService(
 		identityService:     identityService,
 		httpUpstream:        httpUpstream,
 		deferredService:     deferredService,
+		claudeTokenProvider: claudeTokenProvider,
 	}
 }
 
@@ -1079,6 +1082,16 @@ func (s *GatewayService) GetAccessToken(ctx context.Context, account *Account) (
 }
 
 func (s *GatewayService) getOAuthToken(ctx context.Context, account *Account) (string, string, error) {
+	// 对于 Anthropic OAuth 账号，使用 ClaudeTokenProvider 获取缓存的 token
+	if account.Platform == PlatformAnthropic && account.Type == AccountTypeOAuth && s.claudeTokenProvider != nil {
+		accessToken, err := s.claudeTokenProvider.GetAccessToken(ctx, account)
+		if err != nil {
+			return "", "", err
+		}
+		return accessToken, "oauth", nil
+	}
+
+	// 其他情况（Gemini 有自己的 TokenProvider，setup-token 类型等）直接从账号读取
 	accessToken := account.GetCredential("access_token")
 	if accessToken == "" {
 		return "", "", errors.New("access_token not found in credentials")

backend/internal/service/gemini_token_provider.go

@@ -154,7 +154,7 @@ func (p *GeminiTokenProvider) GetAccessToken(ctx context.Context, account *Accou
 func GeminiTokenCacheKey(account *Account) string {
 	projectID := strings.TrimSpace(account.GetCredential("project_id"))
 	if projectID != "" {
-		return projectID
+		return "gemini:" + projectID
 	}
-	return "account:" + strconv.FormatInt(account.ID, 10)
+	return "gemini:account:" + strconv.FormatInt(account.ID, 10)
 }

backend/internal/service/openai_gateway_service.go

@@ -93,6 +93,7 @@ type OpenAIGatewayService struct {
 	billingCacheService *BillingCacheService
 	httpUpstream        HTTPUpstream
 	deferredService     *DeferredService
+	openAITokenProvider *OpenAITokenProvider
 }
 
 // NewOpenAIGatewayService creates a new OpenAIGatewayService
@@ -110,6 +111,7 @@ func NewOpenAIGatewayService(
 	billingCacheService *BillingCacheService,
 	httpUpstream HTTPUpstream,
 	deferredService *DeferredService,
+	openAITokenProvider *OpenAITokenProvider,
 ) *OpenAIGatewayService {
 	return &OpenAIGatewayService{
 		accountRepo:         accountRepo,
@@ -125,6 +127,7 @@ func NewOpenAIGatewayService(
 		billingCacheService: billingCacheService,
 		httpUpstream:        httpUpstream,
 		deferredService:     deferredService,
+		openAITokenProvider: openAITokenProvider,
 	}
 }
 
@@ -503,6 +506,15 @@ func (s *OpenAIGatewayService) schedulingConfig() config.GatewaySchedulingConfig
 func (s *OpenAIGatewayService) GetAccessToken(ctx context.Context, account *Account) (string, string, error) {
 	switch account.Type {
 	case AccountTypeOAuth:
+		// 使用 TokenProvider 获取缓存的 token
+		if s.openAITokenProvider != nil {
+			accessToken, err := s.openAITokenProvider.GetAccessToken(ctx, account)
+			if err != nil {
+				return "", "", err
+			}
+			return accessToken, "oauth", nil
+		}
+		// 降级：TokenProvider 未配置时直接从账号读取
 		accessToken := account.GetOpenAIAccessToken()
 		if accessToken == "" {
 			return "", "", errors.New("access_token not found in credentials")

backend/internal/service/openai_token_provider.go

+package service
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"strings"
+	"time"
+)
+
+const (
+	openAITokenRefreshSkew = 3 * time.Minute
+	openAITokenCacheSkew   = 5 * time.Minute
+	openAILockWaitTime     = 200 * time.Millisecond
+)
+
+// OpenAITokenCache Token 缓存接口（复用 GeminiTokenCache 接口定义）
+type OpenAITokenCache = GeminiTokenCache
+
+// OpenAITokenProvider 管理 OpenAI OAuth 账户的 access_token
+type OpenAITokenProvider struct {
+	accountRepo        AccountRepository
+	tokenCache         OpenAITokenCache
+	openAIOAuthService *OpenAIOAuthService
+}
+
+func NewOpenAITokenProvider(
+	accountRepo AccountRepository,
+	tokenCache OpenAITokenCache,
+	openAIOAuthService *OpenAIOAuthService,
+) *OpenAITokenProvider {
+	return &OpenAITokenProvider{
+		accountRepo:        accountRepo,
+		tokenCache:         tokenCache,
+		openAIOAuthService: openAIOAuthService,
+	}
+}
+
+// GetAccessToken 获取有效的 access_token
+func (p *OpenAITokenProvider) GetAccessToken(ctx context.Context, account *Account) (string, error) {
+	if account == nil {
+		return "", errors.New("account is nil")
+	}
+	if account.Platform != PlatformOpenAI || account.Type != AccountTypeOAuth {
+		return "", errors.New("not an openai oauth account")
+	}
+
+	cacheKey := OpenAITokenCacheKey(account)
+
+	// 1. 先尝试缓存
+	if p.tokenCache != nil {
+		if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+			slog.Debug("openai_token_cache_hit", "account_id", account.ID)
+			return token, nil
+		} else if err != nil {
+			slog.Warn("openai_token_cache_get_failed", "account_id", account.ID, "error", err)
+		}
+	}
+
+	slog.Debug("openai_token_cache_miss", "account_id", account.ID)
+
+	// 2. 如果即将过期则刷新
+	expiresAt := account.GetCredentialAsTime("expires_at")
+	needsRefresh := expiresAt == nil || time.Until(*expiresAt) <= openAITokenRefreshSkew
+	refreshFailed := false
+	if needsRefresh && p.tokenCache != nil {
+		locked, lockErr := p.tokenCache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
+		if lockErr == nil && locked {
+			defer func() { _ = p.tokenCache.ReleaseRefreshLock(ctx, cacheKey) }()
+
+			// 拿到锁后再次检查缓存（另一个 worker 可能已刷新）
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+				return token, nil
+			}
+
+			// 从数据库获取最新账户信息
+			fresh, err := p.accountRepo.GetByID(ctx, account.ID)
+			if err == nil && fresh != nil {
+				account = fresh
+			}
+			expiresAt = account.GetCredentialAsTime("expires_at")
+			if expiresAt == nil || time.Until(*expiresAt) <= openAITokenRefreshSkew {
+				if p.openAIOAuthService == nil {
+					slog.Warn("openai_oauth_service_not_configured", "account_id", account.ID)
+					refreshFailed = true // 无法刷新，标记失败
+				} else {
+					tokenInfo, err := p.openAIOAuthService.RefreshAccountToken(ctx, account)
+					if err != nil {
+						// 刷新失败时记录警告，但不立即返回错误，尝试使用现有 token
+						slog.Warn("openai_token_refresh_failed", "account_id", account.ID, "error", err)
+						refreshFailed = true // 刷新失败，标记以使用短 TTL
+					} else {
+						newCredentials := p.openAIOAuthService.BuildAccountCredentials(tokenInfo)
+						for k, v := range account.Credentials {
+							if _, exists := newCredentials[k]; !exists {
+								newCredentials[k] = v
+							}
+						}
+						account.Credentials = newCredentials
+						if updateErr := p.accountRepo.Update(ctx, account); updateErr != nil {
+							slog.Error("openai_token_provider_update_failed", "account_id", account.ID, "error", updateErr)
+						}
+						expiresAt = account.GetCredentialAsTime("expires_at")
+					}
+				}
+			}
+		} else if lockErr != nil {
+			// Redis 错误导致无法获取锁，降级为无锁刷新（仅在 token 接近过期时）
+			slog.Warn("openai_token_lock_failed_degraded_refresh", "account_id", account.ID, "error", lockErr)
+
+			// 检查 ctx 是否已取消
+			if ctx.Err() != nil {
+				return "", ctx.Err()
+			}
+
+			// 从数据库获取最新账户信息
+			if p.accountRepo != nil {
+				fresh, err := p.accountRepo.GetByID(ctx, account.ID)
+				if err == nil && fresh != nil {
+					account = fresh
+				}
+			}
+			expiresAt = account.GetCredentialAsTime("expires_at")
+
+			// 仅在 expires_at 已过期/接近过期时才执行无锁刷新
+			if expiresAt == nil || time.Until(*expiresAt) <= openAITokenRefreshSkew {
+				if p.openAIOAuthService == nil {
+					slog.Warn("openai_oauth_service_not_configured", "account_id", account.ID)
+					refreshFailed = true
+				} else {
+					tokenInfo, err := p.openAIOAuthService.RefreshAccountToken(ctx, account)
+					if err != nil {
+						slog.Warn("openai_token_refresh_failed_degraded", "account_id", account.ID, "error", err)
+						refreshFailed = true
+					} else {
+						newCredentials := p.openAIOAuthService.BuildAccountCredentials(tokenInfo)
+						for k, v := range account.Credentials {
+							if _, exists := newCredentials[k]; !exists {
+								newCredentials[k] = v
+							}
+						}
+						account.Credentials = newCredentials
+						if updateErr := p.accountRepo.Update(ctx, account); updateErr != nil {
+							slog.Error("openai_token_provider_update_failed", "account_id", account.ID, "error", updateErr)
+						}
+						expiresAt = account.GetCredentialAsTime("expires_at")
+					}
+				}
+			}
+		} else {
+			// 锁获取失败（被其他 worker 持有），等待 200ms 后重试读取缓存
+			time.Sleep(openAILockWaitTime)
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && strings.TrimSpace(token) != "" {
+				slog.Debug("openai_token_cache_hit_after_wait", "account_id", account.ID)
+				return token, nil
+			}
+		}
+	}
+
+	accessToken := account.GetOpenAIAccessToken()
+	if strings.TrimSpace(accessToken) == "" {
+		return "", errors.New("access_token not found in credentials")
+	}
+
+	// 3. 存入缓存
+	if p.tokenCache != nil {
+		ttl := 30 * time.Minute
+		if refreshFailed {
+			// 刷新失败时使用短 TTL，避免失效 token 长时间缓存导致 401 抖动
+			ttl = time.Minute
+			slog.Debug("openai_token_cache_short_ttl", "account_id", account.ID, "reason", "refresh_failed")
+		} else if expiresAt != nil {
+			until := time.Until(*expiresAt)
+			switch {
+			case until > openAITokenCacheSkew:
+				ttl = until - openAITokenCacheSkew
+			case until > 0:
+				ttl = until
+			default:
+				ttl = time.Minute
+			}
+		}
+		if err := p.tokenCache.SetAccessToken(ctx, cacheKey, accessToken, ttl); err != nil {
+			slog.Warn("openai_token_cache_set_failed", "account_id", account.ID, "error", err)
+		}
+	}
+
+	return accessToken, nil
+}

backend/internal/service/openai_token_provider_test.go

+//go:build unit
+
+package service
+
+import (
+	"context"
+	"errors"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+// openAITokenCacheStub implements OpenAITokenCache for testing
+type openAITokenCacheStub struct {
+	mu               sync.Mutex
+	tokens           map[string]string
+	getErr           error
+	setErr           error
+	deleteErr        error
+	lockAcquired     bool
+	lockErr          error
+	releaseLockErr   error
+	getCalled        int32
+	setCalled        int32
+	lockCalled       int32
+	unlockCalled     int32
+	simulateLockRace bool
+}
+
+func newOpenAITokenCacheStub() *openAITokenCacheStub {
+	return &openAITokenCacheStub{
+		tokens:       make(map[string]string),
+		lockAcquired: true,
+	}
+}
+
+func (s *openAITokenCacheStub) GetAccessToken(ctx context.Context, cacheKey string) (string, error) {
+	atomic.AddInt32(&s.getCalled, 1)
+	if s.getErr != nil {
+		return "", s.getErr
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.tokens[cacheKey], nil
+}
+
+func (s *openAITokenCacheStub) SetAccessToken(ctx context.Context, cacheKey string, token string, ttl time.Duration) error {
+	atomic.AddInt32(&s.setCalled, 1)
+	if s.setErr != nil {
+		return s.setErr
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.tokens[cacheKey] = token
+	return nil
+}
+
+func (s *openAITokenCacheStub) DeleteAccessToken(ctx context.Context, cacheKey string) error {
+	if s.deleteErr != nil {
+		return s.deleteErr
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	delete(s.tokens, cacheKey)
+	return nil
+}
+
+func (s *openAITokenCacheStub) AcquireRefreshLock(ctx context.Context, cacheKey string, ttl time.Duration) (bool, error) {
+	atomic.AddInt32(&s.lockCalled, 1)
+	if s.lockErr != nil {
+		return false, s.lockErr
+	}
+	if s.simulateLockRace {
+		return false, nil
+	}
+	return s.lockAcquired, nil
+}
+
+func (s *openAITokenCacheStub) ReleaseRefreshLock(ctx context.Context, cacheKey string) error {
+	atomic.AddInt32(&s.unlockCalled, 1)
+	return s.releaseLockErr
+}
+
+// openAIAccountRepoStub is a minimal stub implementing only the methods used by OpenAITokenProvider
+type openAIAccountRepoStub struct {
+	account      *Account
+	getErr       error
+	updateErr    error
+	getCalled    int32
+	updateCalled int32
+}
+
+func (r *openAIAccountRepoStub) GetByID(ctx context.Context, id int64) (*Account, error) {
+	atomic.AddInt32(&r.getCalled, 1)
+	if r.getErr != nil {
+		return nil, r.getErr
+	}
+	return r.account, nil
+}
+
+func (r *openAIAccountRepoStub) Update(ctx context.Context, account *Account) error {
+	atomic.AddInt32(&r.updateCalled, 1)
+	if r.updateErr != nil {
+		return r.updateErr
+	}
+	r.account = account
+	return nil
+}
+
+// openAIOAuthServiceStub implements OpenAIOAuthService methods for testing
+type openAIOAuthServiceStub struct {
+	tokenInfo     *OpenAITokenInfo
+	refreshErr    error
+	refreshCalled int32
+}
+
+func (s *openAIOAuthServiceStub) RefreshAccountToken(ctx context.Context, account *Account) (*OpenAITokenInfo, error) {
+	atomic.AddInt32(&s.refreshCalled, 1)
+	if s.refreshErr != nil {
+		return nil, s.refreshErr
+	}
+	return s.tokenInfo, nil
+}
+
+func (s *openAIOAuthServiceStub) BuildAccountCredentials(info *OpenAITokenInfo) map[string]any {
+	now := time.Now()
+	return map[string]any{
+		"access_token":  info.AccessToken,
+		"refresh_token": info.RefreshToken,
+		"expires_at":    now.Add(time.Duration(info.ExpiresIn) * time.Second).Format(time.RFC3339),
+	}
+}
+
+func TestOpenAITokenProvider_CacheHit(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	account := &Account{
+		ID:       100,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "db-token",
+		},
+	}
+	cacheKey := OpenAITokenCacheKey(account)
+	cache.tokens[cacheKey] = "cached-token"
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "cached-token", token)
+	require.Equal(t, int32(1), atomic.LoadInt32(&cache.getCalled))
+	require.Equal(t, int32(0), atomic.LoadInt32(&cache.setCalled))
+}
+
+func TestOpenAITokenProvider_CacheMiss_FromCredentials(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	// Token expires in far future, no refresh needed
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       101,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "credential-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "credential-token", token)
+
+	// Should have stored in cache
+	cacheKey := OpenAITokenCacheKey(account)
+	require.Equal(t, "credential-token", cache.tokens[cacheKey])
+}
+
+func TestOpenAITokenProvider_TokenRefresh(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	accountRepo := &openAIAccountRepoStub{}
+	oauthService := &openAIOAuthServiceStub{
+		tokenInfo: &OpenAITokenInfo{
+			AccessToken:  "refreshed-token",
+			RefreshToken: "new-refresh-token",
+			ExpiresIn:    3600,
+		},
+	}
+
+	// Token expires soon (within refresh skew)
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       102,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token":  "old-token",
+			"refresh_token": "old-refresh-token",
+			"expires_at":    expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	// We need to directly test with the stub - create a custom provider
+	customProvider := &testOpenAITokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	token, err := customProvider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "refreshed-token", token)
+	require.Equal(t, int32(1), atomic.LoadInt32(&oauthService.refreshCalled))
+}
+
+// testOpenAITokenProvider is a test version that uses the stub OAuth service
+type testOpenAITokenProvider struct {
+	accountRepo  *openAIAccountRepoStub
+	tokenCache   *openAITokenCacheStub
+	oauthService *openAIOAuthServiceStub
+}
+
+func (p *testOpenAITokenProvider) GetAccessToken(ctx context.Context, account *Account) (string, error) {
+	if account == nil {
+		return "", errors.New("account is nil")
+	}
+	if account.Platform != PlatformOpenAI || account.Type != AccountTypeOAuth {
+		return "", errors.New("not an openai oauth account")
+	}
+
+	cacheKey := OpenAITokenCacheKey(account)
+
+	// 1. Check cache
+	if p.tokenCache != nil {
+		if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && token != "" {
+			return token, nil
+		}
+	}
+
+	// 2. Check if refresh needed
+	expiresAt := account.GetCredentialAsTime("expires_at")
+	needsRefresh := expiresAt == nil || time.Until(*expiresAt) <= openAITokenRefreshSkew
+	refreshFailed := false
+	if needsRefresh && p.tokenCache != nil {
+		locked, err := p.tokenCache.AcquireRefreshLock(ctx, cacheKey, 30*time.Second)
+		if err == nil && locked {
+			defer func() { _ = p.tokenCache.ReleaseRefreshLock(ctx, cacheKey) }()
+
+			// Check cache again after acquiring lock
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && token != "" {
+				return token, nil
+			}
+
+			// Get fresh account from DB
+			fresh, err := p.accountRepo.GetByID(ctx, account.ID)
+			if err == nil && fresh != nil {
+				account = fresh
+			}
+			expiresAt = account.GetCredentialAsTime("expires_at")
+			if expiresAt == nil || time.Until(*expiresAt) <= openAITokenRefreshSkew {
+				if p.oauthService == nil {
+					refreshFailed = true // 无法刷新，标记失败
+				} else {
+					tokenInfo, err := p.oauthService.RefreshAccountToken(ctx, account)
+					if err != nil {
+						refreshFailed = true // 刷新失败，标记以使用短 TTL
+					} else {
+						newCredentials := p.oauthService.BuildAccountCredentials(tokenInfo)
+						for k, v := range account.Credentials {
+							if _, exists := newCredentials[k]; !exists {
+								newCredentials[k] = v
+							}
+						}
+						account.Credentials = newCredentials
+						_ = p.accountRepo.Update(ctx, account)
+						expiresAt = account.GetCredentialAsTime("expires_at")
+					}
+				}
+			}
+		} else if p.tokenCache.simulateLockRace {
+			// Wait and retry cache
+			time.Sleep(10 * time.Millisecond) // Short wait for test
+			if token, err := p.tokenCache.GetAccessToken(ctx, cacheKey); err == nil && token != "" {
+				return token, nil
+			}
+		}
+	}
+
+	accessToken := account.GetOpenAIAccessToken()
+	if accessToken == "" {
+		return "", errors.New("access_token not found in credentials")
+	}
+
+	// 3. Store in cache
+	if p.tokenCache != nil {
+		ttl := 30 * time.Minute
+		if refreshFailed {
+			ttl = time.Minute // 刷新失败时使用短 TTL
+		} else if expiresAt != nil {
+			until := time.Until(*expiresAt)
+			if until > openAITokenCacheSkew {
+				ttl = until - openAITokenCacheSkew
+			} else if until > 0 {
+				ttl = until
+			} else {
+				ttl = time.Minute
+			}
+		}
+		_ = p.tokenCache.SetAccessToken(ctx, cacheKey, accessToken, ttl)
+	}
+
+	return accessToken, nil
+}
+
+func TestOpenAITokenProvider_LockRaceCondition(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cache.simulateLockRace = true
+	accountRepo := &openAIAccountRepoStub{}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       103,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "race-token",
+			"expires_at":   expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	// Simulate another worker already refreshed and cached
+	cacheKey := OpenAITokenCacheKey(account)
+	go func() {
+		time.Sleep(5 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "winner-token"
+		cache.mu.Unlock()
+	}()
+
+	provider := &testOpenAITokenProvider{
+		accountRepo: accountRepo,
+		tokenCache:  cache,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	// Should get the token set by the "winner" or the original
+	require.NotEmpty(t, token)
+}
+
+func TestOpenAITokenProvider_NilAccount(t *testing.T) {
+	provider := NewOpenAITokenProvider(nil, nil, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), nil)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "account is nil")
+	require.Empty(t, token)
+}
+
+func TestOpenAITokenProvider_WrongPlatform(t *testing.T) {
+	provider := NewOpenAITokenProvider(nil, nil, nil)
+	account := &Account{
+		ID:       104,
+		Platform: PlatformGemini,
+		Type:     AccountTypeOAuth,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "not an openai oauth account")
+	require.Empty(t, token)
+}
+
+func TestOpenAITokenProvider_WrongAccountType(t *testing.T) {
+	provider := NewOpenAITokenProvider(nil, nil, nil)
+	account := &Account{
+		ID:       105,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeAPIKey,
+	}
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "not an openai oauth account")
+	require.Empty(t, token)
+}
+
+func TestOpenAITokenProvider_NilCache(t *testing.T) {
+	// Token doesn't need refresh
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       106,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "nocache-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, nil, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "nocache-token", token)
+}
+
+func TestOpenAITokenProvider_CacheGetError(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cache.getErr = errors.New("redis connection failed")
+
+	// Token doesn't need refresh
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       107,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "fallback-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+
+	// Should gracefully degrade and return from credentials
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "fallback-token", token)
+}
+
+func TestOpenAITokenProvider_CacheSetError(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cache.setErr = errors.New("redis write failed")
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       108,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "still-works-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+
+	// Should still work even if cache set fails
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "still-works-token", token)
+}
+
+func TestOpenAITokenProvider_MissingAccessToken(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       109,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"expires_at": expiresAt,
+			// missing access_token
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "access_token not found")
+	require.Empty(t, token)
+}
+
+func TestOpenAITokenProvider_RefreshError(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	accountRepo := &openAIAccountRepoStub{}
+	oauthService := &openAIOAuthServiceStub{
+		refreshErr: errors.New("oauth refresh failed"),
+	}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       110,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token":  "old-token",
+			"refresh_token": "old-refresh-token",
+			"expires_at":    expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	provider := &testOpenAITokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	// Now with fallback behavior, should return existing token even if refresh fails
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "old-token", token) // Fallback to existing token
+}
+
+func TestOpenAITokenProvider_OAuthServiceNotConfigured(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	accountRepo := &openAIAccountRepoStub{}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       111,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "old-token",
+			"expires_at":   expiresAt,
+		},
+	}
+	accountRepo.account = account
+
+	provider := &testOpenAITokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: nil, // not configured
+	}
+
+	// Now with fallback behavior, should return existing token even if oauth service not configured
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "old-token", token) // Fallback to existing token
+}
+
+func TestOpenAITokenProvider_TTLCalculation(t *testing.T) {
+	tests := []struct {
+		name        string
+		expiresIn   time.Duration
+	}{
+		{
+			name:        "far_future_expiry",
+			expiresIn:   1 * time.Hour,
+		},
+		{
+			name:        "medium_expiry",
+			expiresIn:   10 * time.Minute,
+		},
+		{
+			name:        "near_expiry",
+			expiresIn:   6 * time.Minute,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cache := newOpenAITokenCacheStub()
+			expiresAt := time.Now().Add(tt.expiresIn).Format(time.RFC3339)
+			account := &Account{
+				ID:       200,
+				Platform: PlatformOpenAI,
+				Type:     AccountTypeOAuth,
+				Credentials: map[string]any{
+					"access_token": "test-token",
+					"expires_at":   expiresAt,
+				},
+			}
+
+			provider := NewOpenAITokenProvider(nil, cache, nil)
+
+			_, err := provider.GetAccessToken(context.Background(), account)
+			require.NoError(t, err)
+
+			// Verify token was cached
+			cacheKey := OpenAITokenCacheKey(account)
+			require.Equal(t, "test-token", cache.tokens[cacheKey])
+		})
+	}
+}
+
+func TestOpenAITokenProvider_DoubleCheckAfterLock(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	accountRepo := &openAIAccountRepoStub{}
+	oauthService := &openAIOAuthServiceStub{
+		tokenInfo: &OpenAITokenInfo{
+			AccessToken:  "refreshed-token",
+			RefreshToken: "new-refresh",
+			ExpiresIn:    3600,
+		},
+	}
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       112,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "old-token",
+			"expires_at":   expiresAt,
+		},
+	}
+	accountRepo.account = account
+	cacheKey := OpenAITokenCacheKey(account)
+
+	// Simulate: first GetAccessToken returns empty, but after lock acquired, cache has token
+	originalGet := int32(0)
+	cache.tokens[cacheKey] = "" // Empty initially
+
+	provider := &testOpenAITokenProvider{
+		accountRepo:  accountRepo,
+		tokenCache:   cache,
+		oauthService: oauthService,
+	}
+
+	// In a goroutine, set the cached token after a small delay (simulating race)
+	go func() {
+		time.Sleep(5 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "cached-by-other"
+		cache.mu.Unlock()
+	}()
+
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	// Should get either the refreshed token or the cached one
+	require.NotEmpty(t, token)
+	_ = originalGet // Suppress unused warning
+}
+
+// Tests for real provider - to increase coverage
+func TestOpenAITokenProvider_Real_LockFailedWait(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cache.lockAcquired = false // Lock acquisition fails
+
+	// Token expires soon (within refresh skew) to trigger lock attempt
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       200,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "fallback-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	// Set token in cache after lock wait period (simulate other worker refreshing)
+	cacheKey := OpenAITokenCacheKey(account)
+	go func() {
+		time.Sleep(100 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "refreshed-by-other"
+		cache.mu.Unlock()
+	}()
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	// Should get either the fallback token or the refreshed one
+	require.NotEmpty(t, token)
+}
+
+func TestOpenAITokenProvider_Real_CacheHitAfterWait(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cache.lockAcquired = false // Lock acquisition fails
+
+	// Token expires soon
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       201,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "original-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	cacheKey := OpenAITokenCacheKey(account)
+	// Set token in cache immediately after wait starts
+	go func() {
+		time.Sleep(50 * time.Millisecond)
+		cache.mu.Lock()
+		cache.tokens[cacheKey] = "winner-token"
+		cache.mu.Unlock()
+	}()
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.NotEmpty(t, token)
+}
+
+func TestOpenAITokenProvider_Real_ExpiredWithoutRefreshToken(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cache.lockAcquired = false // Prevent entering refresh logic
+
+	// Token with nil expires_at (no expiry set) - should use credentials
+	account := &Account{
+		ID:       202,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "no-expiry-token",
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	// Without OAuth service, refresh will fail but token should be returned from credentials
+	require.NoError(t, err)
+	require.Equal(t, "no-expiry-token", token)
+}
+
+func TestOpenAITokenProvider_Real_WhitespaceToken(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cacheKey := "openai:account:203"
+	cache.tokens[cacheKey] = "   " // Whitespace only - should be treated as empty
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       203,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "real-token",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "real-token", token) // Should fall back to credentials
+}
+
+func TestOpenAITokenProvider_Real_LockError(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+	cache.lockErr = errors.New("redis lock failed")
+
+	// Token expires soon (within refresh skew)
+	expiresAt := time.Now().Add(1 * time.Minute).Format(time.RFC3339)
+	account := &Account{
+		ID:       204,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "fallback-on-lock-error",
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, "fallback-on-lock-error", token)
+}
+
+func TestOpenAITokenProvider_Real_WhitespaceCredentialToken(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       205,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "   ", // Whitespace only
+			"expires_at":   expiresAt,
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "access_token not found")
+	require.Empty(t, token)
+}
+
+func TestOpenAITokenProvider_Real_NilCredentials(t *testing.T) {
+	cache := newOpenAITokenCacheStub()
+
+	expiresAt := time.Now().Add(1 * time.Hour).Format(time.RFC3339)
+	account := &Account{
+		ID:       206,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"expires_at": expiresAt,
+			// No access_token
+		},
+	}
+
+	provider := NewOpenAITokenProvider(nil, cache, nil)
+	token, err := provider.GetAccessToken(context.Background(), account)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "access_token not found")
+	require.Empty(t, token)
+}

backend/internal/service/ratelimit_service.go

@@ -85,13 +85,24 @@ func (s *RateLimitService) HandleUpstreamError(ctx context.Context, account *Acc
 
 	switch statusCode {
 	case 401:
-		if account.Type == AccountTypeOAuth &&
-			(account.Platform == PlatformAntigravity || account.Platform == PlatformGemini) {
+		// 对所有 OAuth 账号在 401 错误时调用缓存失效并强制下次刷新
+		if account.Type == AccountTypeOAuth {
+			// 1. 失效缓存
 			if s.tokenCacheInvalidator != nil {
 				if err := s.tokenCacheInvalidator.InvalidateToken(ctx, account); err != nil {
 					slog.Warn("oauth_401_invalidate_cache_failed", "account_id", account.ID, "error", err)
 				}
 			}
+			// 2. 设置 expires_at 为当前时间，强制下次请求刷新 token
+			if account.Credentials == nil {
+				account.Credentials = make(map[string]any)
+			}
+			account.Credentials["expires_at"] = time.Now().Format(time.RFC3339)
+			if err := s.accountRepo.Update(ctx, account); err != nil {
+				slog.Warn("oauth_401_force_refresh_update_failed", "account_id", account.ID, "error", err)
+			} else {
+				slog.Info("oauth_401_force_refresh_set", "account_id", account.ID, "platform", account.Platform)
+			}
 		}
 		msg := "Authentication failed (401): invalid or expired credentials"
 		if upstreamMsg != "" {

backend/internal/service/token_cache_invalidator.go

@@ -7,29 +7,35 @@ type TokenCacheInvalidator interface {
 }
 
 type CompositeTokenCacheInvalidator struct {
-	geminiCache GeminiTokenCache
+	cache GeminiTokenCache // 统一使用一个缓存接口，通过缓存键前缀区分平台
 }
 
-func NewCompositeTokenCacheInvalidator(geminiCache GeminiTokenCache) *CompositeTokenCacheInvalidator {
+func NewCompositeTokenCacheInvalidator(cache GeminiTokenCache) *CompositeTokenCacheInvalidator {
 	return &CompositeTokenCacheInvalidator{
-		geminiCache: geminiCache,
+		cache: cache,
 	}
 }
 
 func (c *CompositeTokenCacheInvalidator) InvalidateToken(ctx context.Context, account *Account) error {
-	if c == nil || c.geminiCache == nil || account == nil {
+	if c == nil || c.cache == nil || account == nil {
 		return nil
 	}
 	if account.Type != AccountTypeOAuth {
 		return nil
 	}
 
+	var cacheKey string
 	switch account.Platform {
 	case PlatformGemini:
-		return c.geminiCache.DeleteAccessToken(ctx, GeminiTokenCacheKey(account))
+		cacheKey = GeminiTokenCacheKey(account)
 	case PlatformAntigravity:
-		return c.geminiCache.DeleteAccessToken(ctx, AntigravityTokenCacheKey(account))
+		cacheKey = AntigravityTokenCacheKey(account)
+	case PlatformOpenAI:
+		cacheKey = OpenAITokenCacheKey(account)
+	case PlatformAnthropic:
+		cacheKey = ClaudeTokenCacheKey(account)
 	default:
 		return nil
 	}
+	return c.cache.DeleteAccessToken(ctx, cacheKey)
 }

backend/internal/service/token_cache_invalidator_test.go

@@ -4,6 +4,7 @@ package service
 
 import (
 	"context"
+	"errors"
 	"testing"
 	"time"
 
@@ -50,7 +51,7 @@ func TestCompositeTokenCacheInvalidator_Gemini(t *testing.T) {
 
 	err := invalidator.InvalidateToken(context.Background(), account)
 	require.NoError(t, err)
-	require.Equal(t, []string{"project-x"}, cache.deletedKeys)
+	require.Equal(t, []string{"gemini:project-x"}, cache.deletedKeys)
 }
 
 func TestCompositeTokenCacheInvalidator_Antigravity(t *testing.T) {
@@ -70,13 +71,99 @@ func TestCompositeTokenCacheInvalidator_Antigravity(t *testing.T) {
 	require.Equal(t, []string{"ag:ag-project"}, cache.deletedKeys)
 }
 
+func TestCompositeTokenCacheInvalidator_OpenAI(t *testing.T) {
+	cache := &geminiTokenCacheStub{}
+	invalidator := NewCompositeTokenCacheInvalidator(cache)
+	account := &Account{
+		ID:       500,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "openai-token",
+		},
+	}
+
+	err := invalidator.InvalidateToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, []string{"openai:account:500"}, cache.deletedKeys)
+}
+
+func TestCompositeTokenCacheInvalidator_Claude(t *testing.T) {
+	cache := &geminiTokenCacheStub{}
+	invalidator := NewCompositeTokenCacheInvalidator(cache)
+	account := &Account{
+		ID:       600,
+		Platform: PlatformAnthropic,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"access_token": "claude-token",
+		},
+	}
+
+	err := invalidator.InvalidateToken(context.Background(), account)
+	require.NoError(t, err)
+	require.Equal(t, []string{"claude:account:600"}, cache.deletedKeys)
+}
+
 func TestCompositeTokenCacheInvalidator_SkipNonOAuth(t *testing.T) {
 	cache := &geminiTokenCacheStub{}
 	invalidator := NewCompositeTokenCacheInvalidator(cache)
+
+	tests := []struct {
+		name     string
+		account  *Account
+	}{
+		{
+			name: "gemini_api_key",
+			account: &Account{
+				ID:       1,
+				Platform: PlatformGemini,
+				Type:     AccountTypeAPIKey,
+			},
+		},
+		{
+			name: "openai_api_key",
+			account: &Account{
+				ID:       2,
+				Platform: PlatformOpenAI,
+				Type:     AccountTypeAPIKey,
+			},
+		},
+		{
+			name: "claude_api_key",
+			account: &Account{
+				ID:       3,
+				Platform: PlatformAnthropic,
+				Type:     AccountTypeAPIKey,
+			},
+		},
+		{
+			name: "claude_setup_token",
+			account: &Account{
+				ID:       4,
+				Platform: PlatformAnthropic,
+				Type:     AccountTypeSetupToken,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cache.deletedKeys = nil
+			err := invalidator.InvalidateToken(context.Background(), tt.account)
+			require.NoError(t, err)
+			require.Empty(t, cache.deletedKeys)
+		})
+	}
+}
+
+func TestCompositeTokenCacheInvalidator_SkipUnsupportedPlatform(t *testing.T) {
+	cache := &geminiTokenCacheStub{}
+	invalidator := NewCompositeTokenCacheInvalidator(cache)
 	account := &Account{
-		ID:       1,
-		Platform: PlatformGemini,
-		Type:     AccountTypeAPIKey,
+		ID:       100,
+		Platform: "unknown-platform",
+		Type:     AccountTypeOAuth,
 	}
 
 	err := invalidator.InvalidateToken(context.Background(), account)
@@ -95,3 +182,87 @@ func TestCompositeTokenCacheInvalidator_NilCache(t *testing.T) {
 	err := invalidator.InvalidateToken(context.Background(), account)
 	require.NoError(t, err)
 }
+
+func TestCompositeTokenCacheInvalidator_NilAccount(t *testing.T) {
+	cache := &geminiTokenCacheStub{}
+	invalidator := NewCompositeTokenCacheInvalidator(cache)
+
+	err := invalidator.InvalidateToken(context.Background(), nil)
+	require.NoError(t, err)
+	require.Empty(t, cache.deletedKeys)
+}
+
+func TestCompositeTokenCacheInvalidator_NilInvalidator(t *testing.T) {
+	var invalidator *CompositeTokenCacheInvalidator
+	account := &Account{
+		ID:       5,
+		Platform: PlatformGemini,
+		Type:     AccountTypeOAuth,
+	}
+
+	err := invalidator.InvalidateToken(context.Background(), account)
+	require.NoError(t, err)
+}
+
+func TestCompositeTokenCacheInvalidator_DeleteError(t *testing.T) {
+	expectedErr := errors.New("redis connection failed")
+	cache := &geminiTokenCacheStub{deleteErr: expectedErr}
+	invalidator := NewCompositeTokenCacheInvalidator(cache)
+
+	tests := []struct {
+		name     string
+		account  *Account
+	}{
+		{
+			name: "openai_delete_error",
+			account: &Account{
+				ID:       700,
+				Platform: PlatformOpenAI,
+				Type:     AccountTypeOAuth,
+			},
+		},
+		{
+			name: "claude_delete_error",
+			account: &Account{
+				ID:       800,
+				Platform: PlatformAnthropic,
+				Type:     AccountTypeOAuth,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := invalidator.InvalidateToken(context.Background(), tt.account)
+			require.Error(t, err)
+			require.Equal(t, expectedErr, err)
+		})
+	}
+}
+
+func TestCompositeTokenCacheInvalidator_AllPlatformsIntegration(t *testing.T) {
+	// 测试所有平台的缓存键生成和删除
+	cache := &geminiTokenCacheStub{}
+	invalidator := NewCompositeTokenCacheInvalidator(cache)
+
+	accounts := []*Account{
+		{ID: 1, Platform: PlatformGemini, Type: AccountTypeOAuth, Credentials: map[string]any{"project_id": "gemini-proj"}},
+		{ID: 2, Platform: PlatformAntigravity, Type: AccountTypeOAuth, Credentials: map[string]any{"project_id": "ag-proj"}},
+		{ID: 3, Platform: PlatformOpenAI, Type: AccountTypeOAuth},
+		{ID: 4, Platform: PlatformAnthropic, Type: AccountTypeOAuth},
+	}
+
+	expectedKeys := []string{
+		"gemini:gemini-proj",
+		"ag:ag-proj",
+		"openai:account:3",
+		"claude:account:4",
+	}
+
+	for _, acc := range accounts {
+		err := invalidator.InvalidateToken(context.Background(), acc)
+		require.NoError(t, err)
+	}
+
+	require.Equal(t, expectedKeys, cache.deletedKeys)
+}

backend/internal/service/token_cache_key.go

+package service
+
+import "strconv"
+
+// OpenAITokenCacheKey 生成 OpenAI OAuth 账号的缓存键
+// 格式: "openai:account:{account_id}"
+func OpenAITokenCacheKey(account *Account) string {
+	return "openai:account:" + strconv.FormatInt(account.ID, 10)
+}
+
+// ClaudeTokenCacheKey 生成 Claude (Anthropic) OAuth 账号的缓存键
+// 格式: "claude:account:{account_id}"
+func ClaudeTokenCacheKey(account *Account) string {
+	return "claude:account:" + strconv.FormatInt(account.ID, 10)
+}

backend/internal/service/token_cache_key_test.go

@@ -22,7 +22,7 @@ func TestGeminiTokenCacheKey(t *testing.T) {
 					"project_id": "my-project-123",
 				},
 			},
-			expected: "my-project-123",
+			expected: "gemini:my-project-123",
 		},
 		{
 			name: "project_id_with_whitespace",
@@ -32,7 +32,7 @@ func TestGeminiTokenCacheKey(t *testing.T) {
 					"project_id": "  project-with-spaces  ",
 				},
 			},
-			expected: "project-with-spaces",
+			expected: "gemini:project-with-spaces",
 		},
 		{
 			name: "empty_project_id_fallback_to_account_id",
@@ -42,7 +42,7 @@ func TestGeminiTokenCacheKey(t *testing.T) {
 					"project_id": "",
 				},
 			},
-			expected: "account:102",
+			expected: "gemini:account:102",
 		},
 		{
 			name: "whitespace_only_project_id_fallback_to_account_id",
@@ -52,7 +52,7 @@ func TestGeminiTokenCacheKey(t *testing.T) {
 					"project_id": "   ",
 				},
 			},
-			expected: "account:103",
+			expected: "gemini:account:103",
 		},
 		{
 			name: "no_project_id_key_fallback_to_account_id",
@@ -60,7 +60,7 @@ func TestGeminiTokenCacheKey(t *testing.T) {
 				ID:          104,
 				Credentials: map[string]any{},
 			},
-			expected: "account:104",
+			expected: "gemini:account:104",
 		},
 		{
 			name: "nil_credentials_fallback_to_account_id",
@@ -68,7 +68,7 @@ func TestGeminiTokenCacheKey(t *testing.T) {
 				ID:          105,
 				Credentials: nil,
 			},
-			expected: "account:105",
+			expected: "gemini:account:105",
 		},
 	}
 
@@ -151,3 +151,109 @@ func TestAntigravityTokenCacheKey(t *testing.T) {
 		})
 	}
 }
+
+func TestOpenAITokenCacheKey(t *testing.T) {
+	tests := []struct {
+		name     string
+		account  *Account
+		expected string
+	}{
+		{
+			name: "basic_account",
+			account: &Account{
+				ID: 300,
+			},
+			expected: "openai:account:300",
+		},
+		{
+			name: "account_with_credentials",
+			account: &Account{
+				ID: 301,
+				Credentials: map[string]any{
+					"access_token": "test-token",
+				},
+			},
+			expected: "openai:account:301",
+		},
+		{
+			name: "account_id_zero",
+			account: &Account{
+				ID: 0,
+			},
+			expected: "openai:account:0",
+		},
+		{
+			name: "large_account_id",
+			account: &Account{
+				ID: 9999999999,
+			},
+			expected: "openai:account:9999999999",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := OpenAITokenCacheKey(tt.account)
+			require.Equal(t, tt.expected, result)
+		})
+	}
+}
+
+func TestClaudeTokenCacheKey(t *testing.T) {
+	tests := []struct {
+		name     string
+		account  *Account
+		expected string
+	}{
+		{
+			name: "basic_account",
+			account: &Account{
+				ID: 400,
+			},
+			expected: "claude:account:400",
+		},
+		{
+			name: "account_with_credentials",
+			account: &Account{
+				ID: 401,
+				Credentials: map[string]any{
+					"access_token": "claude-token",
+				},
+			},
+			expected: "claude:account:401",
+		},
+		{
+			name: "account_id_zero",
+			account: &Account{
+				ID: 0,
+			},
+			expected: "claude:account:0",
+		},
+		{
+			name: "large_account_id",
+			account: &Account{
+				ID: 9999999999,
+			},
+			expected: "claude:account:9999999999",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := ClaudeTokenCacheKey(tt.account)
+			require.Equal(t, tt.expected, result)
+		})
+	}
+}
+
+func TestCacheKeyUniqueness(t *testing.T) {
+	// 确保不同平台的缓存键不会冲突
+	account := &Account{ID: 123}
+
+	openaiKey := OpenAITokenCacheKey(account)
+	claudeKey := ClaudeTokenCacheKey(account)
+
+	require.NotEqual(t, openaiKey, claudeKey, "OpenAI and Claude cache keys should be different")
+	require.Contains(t, openaiKey, "openai:")
+	require.Contains(t, claudeKey, "claude:")
+}

backend/internal/service/token_refresh_service.go

@@ -172,8 +172,8 @@ func (s *TokenRefreshService) refreshWithRetry(ctx context.Context, account *Acc
 			if err := s.accountRepo.Update(ctx, account); err != nil {
 				return fmt.Errorf("failed to save credentials: %w", err)
 			}
-			if s.cacheInvalidator != nil && account.Type == AccountTypeOAuth &&
-				(account.Platform == PlatformGemini || account.Platform == PlatformAntigravity) {
+			// 对所有 OAuth 账号调用缓存失效（InvalidateToken 内部根据平台判断是否需要处理）
+			if s.cacheInvalidator != nil && account.Type == AccountTypeOAuth {
 				if err := s.cacheInvalidator.InvalidateToken(ctx, account); err != nil {
 					log.Printf("[TokenRefresh] Failed to invalidate token cache for account %d: %v", account.ID, err)
 				} else {

backend/internal/service/token_refresh_service_test.go

@@ -197,7 +197,7 @@ func TestTokenRefreshService_RefreshWithRetry_NonOAuthAccount(t *testing.T) {
 	require.Equal(t, 0, invalidator.calls) // 非 OAuth 不触发缓存失效
 }
 
-// TestTokenRefreshService_RefreshWithRetry_OtherPlatformOAuth 测试其他平台的 OAuth 账号不触发缓存失效
+// TestTokenRefreshService_RefreshWithRetry_OtherPlatformOAuth 测试所有 OAuth 平台都触发缓存失效
 func TestTokenRefreshService_RefreshWithRetry_OtherPlatformOAuth(t *testing.T) {
 	repo := &tokenRefreshAccountRepo{}
 	invalidator := &tokenCacheInvalidatorStub{}
@@ -210,7 +210,7 @@ func TestTokenRefreshService_RefreshWithRetry_OtherPlatformOAuth(t *testing.T) {
 	service := NewTokenRefreshService(repo, nil, nil, nil, nil, invalidator, cfg)
 	account := &Account{
 		ID:       10,
-		Platform: PlatformOpenAI, // 其他平台
+		Platform: PlatformOpenAI, // OpenAI OAuth 账户
 		Type:     AccountTypeOAuth,
 	}
 	refresher := &tokenRefresherStub{
@@ -222,7 +222,7 @@ func TestTokenRefreshService_RefreshWithRetry_OtherPlatformOAuth(t *testing.T) {
 	err := service.refreshWithRetry(context.Background(), account, refresher)
 	require.NoError(t, err)
 	require.Equal(t, 1, repo.updateCalls)
-	require.Equal(t, 0, invalidator.calls) // 其他平台不触发缓存失效
+	require.Equal(t, 1, invalidator.calls) // 所有 OAuth 账户刷新后触发缓存失效
 }
 
 // TestTokenRefreshService_RefreshWithRetry_UpdateFailed 测试更新失败的情况

backend/internal/service/wire.go

@@ -214,10 +214,13 @@ var ProviderSet = wire.NewSet(
 	NewGeminiOAuthService,
 	NewGeminiQuotaService,
 	NewCompositeTokenCacheInvalidator,
+	wire.Bind(new(TokenCacheInvalidator), new(*CompositeTokenCacheInvalidator)),
 	NewAntigravityOAuthService,
 	NewGeminiTokenProvider,
 	NewGeminiMessagesCompatService,
 	NewAntigravityTokenProvider,
+	NewOpenAITokenProvider,
+	NewClaudeTokenProvider,
 	NewAntigravityGatewayService,
 	ProvideRateLimitService,
 	NewAccountUsageService,