fix: update tests for group fallback

backend/internal/handler/auth_handler.go

@@ -409,6 +409,7 @@ func (h *AuthHandler) ValidateInvitationCode(c *gin.Context) {
 		Valid: true,
 	})
 }
+
 // ForgotPasswordRequest 忘记密码请求
 type ForgotPasswordRequest struct {
 	Email          string `json:"email" binding:"required,email"`

backend/internal/server/api_contract_test.go

@@ -180,6 +180,7 @@ func TestAPIContracts(t *testing.T) {
 						"image_price_4k": null,
 						"claude_code_only": false,
 						"fallback_group_id": null,
+						"fallback_group_id_on_invalid_request": null,
 						"created_at": "2025-01-02T03:04:05Z",
 						"updated_at": "2025-01-02T03:04:05Z"
 					}
@@ -600,8 +601,8 @@ func newContractDeps(t *testing.T) *contractDeps {
 	settingRepo := newStubSettingRepo()
 	settingService := service.NewSettingService(settingRepo, cfg)
 
-adminService := service.NewAdminService(userRepo, groupRepo, &accountRepo, proxyRepo, apiKeyRepo, redeemRepo, nil, nil, nil, nil)
-authHandler := handler.NewAuthHandler(cfg, nil, userService, settingService, nil, redeemService, nil)
+	adminService := service.NewAdminService(userRepo, groupRepo, &accountRepo, proxyRepo, apiKeyRepo, redeemRepo, nil, nil, nil, nil)
+	authHandler := handler.NewAuthHandler(cfg, nil, userService, settingService, nil, redeemService, nil)
 	apiKeyHandler := handler.NewAPIKeyHandler(apiKeyService)
 	usageHandler := handler.NewUsageHandler(usageService, apiKeyService)
 	adminSettingHandler := adminhandler.NewSettingHandler(settingService, nil, nil, nil)

backend/internal/service/admin_service_group_test.go

@@ -458,6 +458,14 @@ func (s *groupRepoStubForInvalidRequestFallback) DeleteAccountGroupsByGroupID(_
 	panic("unexpected DeleteAccountGroupsByGroupID call")
 }
 
+func (s *groupRepoStubForInvalidRequestFallback) GetAccountIDsByGroupIDs(_ context.Context, _ []int64) ([]int64, error) {
+	panic("unexpected GetAccountIDsByGroupIDs call")
+}
+
+func (s *groupRepoStubForInvalidRequestFallback) BindAccountsToGroup(_ context.Context, _ int64, _ []int64) error {
+	panic("unexpected BindAccountsToGroup call")
+}
+
 func TestAdminService_CreateGroup_InvalidRequestFallbackRejectsUnsupportedPlatform(t *testing.T) {
 	fallbackID := int64(10)
 	repo := &groupRepoStubForInvalidRequestFallback{
@@ -764,4 +772,4 @@ func TestAdminService_UpdateGroup_InvalidRequestFallbackAllowsAntigravity(t *tes
 	require.NotNil(t, group)
 	require.NotNil(t, repo.updated)
 	require.Equal(t, fallbackID, *repo.updated.FallbackGroupIDOnInvalidRequest)
-	}
+}

backend/internal/service/antigravity_gateway_service.go

@@ -2046,6 +2046,9 @@ func (s *AntigravityGatewayService) handleUpstreamError(ctx context.Context, pre
 				fallbackMinutes = s.settingService.cfg.Gateway.AntigravityFallbackCooldownMinutes
 			}
 			defaultDur := time.Duration(fallbackMinutes) * time.Minute
+			if fallbackDur, ok := antigravityFallbackCooldownSeconds(); ok {
+				defaultDur = fallbackDur
+			}
 			ra := time.Now().Add(defaultDur)
 			if useScopeLimit {
 				log.Printf("%s status=429 rate_limited scope=%s reset_in=%v (fallback)", prefix, quotaScope, defaultDur)