diff --git a/backend/internal/handler/admin/account_handler.go b/backend/internal/handler/admin/account_handler.go
index af1e7d91..f2d8a287 100644
--- a/backend/internal/handler/admin/account_handler.go
+++ b/backend/internal/handler/admin/account_handler.go
@@ -1099,12 +1099,8 @@ func (h *AccountHandler) BatchRefreshTier(c *gin.Context) {
 	g.SetLimit(maxConcurrency)
 
 	var mu sync.Mutex
-	results := gin.H{
-		"total":   len(accounts),
-		"success": 0,
-		"failed":  0,
-		"errors":  []gin.H{},
-	}
+	var successCount, failedCount int
+	var errors []gin.H
 
 	for _, account := range accounts {
 		acc := account // 闭包捕获
@@ -1112,8 +1108,8 @@ func (h *AccountHandler) BatchRefreshTier(c *gin.Context) {
 			_, extra, creds, err := h.geminiOAuthService.RefreshAccountGoogleOneTier(gctx, acc)
 			if err != nil {
 				mu.Lock()
-				results["failed"] = results["failed"].(int) + 1
-				results["errors"] = append(results["errors"].([]gin.H), gin.H{
+				failedCount++
+				errors = append(errors, gin.H{
 					"account_id": acc.ID,
 					"error":      err.Error(),
 				})
@@ -1128,13 +1124,13 @@ func (h *AccountHandler) BatchRefreshTier(c *gin.Context) {
 
 			mu.Lock()
 			if updateErr != nil {
-				results["failed"] = results["failed"].(int) + 1
-				results["errors"] = append(results["errors"].([]gin.H), gin.H{
+				failedCount++
+				errors = append(errors, gin.H{
 					"account_id": acc.ID,
 					"error":      updateErr.Error(),
 				})
 			} else {
-				results["success"] = results["success"].(int) + 1
+				successCount++
 			}
 			mu.Unlock()
 
@@ -1147,5 +1143,12 @@ func (h *AccountHandler) BatchRefreshTier(c *gin.Context) {
 		return
 	}
 
+	results := gin.H{
+		"total":   len(accounts),
+		"success": successCount,
+		"failed":  failedCount,
+		"errors":  errors,
+	}
+
 	response.Success(c, results)
 }
diff --git a/backend/internal/pkg/geminicli/drive_client.go b/backend/internal/pkg/geminicli/drive_client.go
index 77e2c476..8f9c745f 100644
--- a/backend/internal/pkg/geminicli/drive_client.go
+++ b/backend/internal/pkg/geminicli/drive_client.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io"
 	"math/rand"
 	"net/http"
 	"strconv"
@@ -112,10 +111,12 @@ func (c *driveClient) GetStorageQuota(ctx context.Context, accessToken, proxyURL
 	}
 
 	if resp.StatusCode != http.StatusOK {
-		body, _ := io.ReadAll(resp.Body)
 		_ = resp.Body.Close()
-		// 记录完整错误
-		fmt.Printf("[DriveClient] API error (status %d): %s\n", resp.StatusCode, string(body))
+		statusText := http.StatusText(resp.StatusCode)
+		if statusText == "" {
+			statusText = resp.Status
+		}
+		fmt.Printf("[DriveClient] Drive API error: status=%d, msg=%s\n", resp.StatusCode, statusText)
 		// 只返回通用错误
 		return nil, fmt.Errorf("drive API error: status %d", resp.StatusCode)
 	}
diff --git a/backend/internal/pkg/geminicli/drive_client_test.go b/backend/internal/pkg/geminicli/drive_client_test.go
index d2c7f25b..b6dd1a69 100644
--- a/backend/internal/pkg/geminicli/drive_client_test.go
+++ b/backend/internal/pkg/geminicli/drive_client_test.go
@@ -16,4 +16,3 @@ func TestDriveStorageInfo(t *testing.T) {
 		t.Errorf("Expected usage 50GB, got %d", info.Usage)
 	}
 }
-
diff --git a/backend/internal/service/account_service_delete_test.go b/backend/internal/service/account_service_delete_test.go
index 2648b828..43703763 100644
--- a/backend/internal/service/account_service_delete_test.go
+++ b/backend/internal/service/account_service_delete_test.go
@@ -40,6 +40,10 @@ func (s *accountRepoStub) GetByID(ctx context.Context, id int64) (*Account, erro
 	panic("unexpected GetByID call")
 }
 
+func (s *accountRepoStub) GetByIDs(ctx context.Context, ids []int64) ([]*Account, error) {
+	panic("unexpected GetByIDs call")
+}
+
 // ExistsByID 返回预设的存在性检查结果。
 // 这是 Delete 方法调用的第一个仓储方法，用于验证账号是否存在。
 func (s *accountRepoStub) ExistsByID(ctx context.Context, id int64) (bool, error) {
diff --git a/backend/internal/service/gateway_multiplatform_test.go b/backend/internal/service/gateway_multiplatform_test.go
index 560c7767..808a48b2 100644
--- a/backend/internal/service/gateway_multiplatform_test.go
+++ b/backend/internal/service/gateway_multiplatform_test.go
@@ -32,6 +32,16 @@ func (m *mockAccountRepoForPlatform) GetByID(ctx context.Context, id int64) (*Ac
 	return nil, errors.New("account not found")
 }
 
+func (m *mockAccountRepoForPlatform) GetByIDs(ctx context.Context, ids []int64) ([]*Account, error) {
+	var result []*Account
+	for _, id := range ids {
+		if acc, ok := m.accountsByID[id]; ok {
+			result = append(result, acc)
+		}
+	}
+	return result, nil
+}
+
 func (m *mockAccountRepoForPlatform) ExistsByID(ctx context.Context, id int64) (bool, error) {
 	if m.accountsByID == nil {
 		return false, nil
diff --git a/backend/internal/service/gemini_multiplatform_test.go b/backend/internal/service/gemini_multiplatform_test.go
index dcc945eb..6ca5052e 100644
--- a/backend/internal/service/gemini_multiplatform_test.go
+++ b/backend/internal/service/gemini_multiplatform_test.go
@@ -25,6 +25,16 @@ func (m *mockAccountRepoForGemini) GetByID(ctx context.Context, id int64) (*Acco
 	return nil, errors.New("account not found")
 }
 
+func (m *mockAccountRepoForGemini) GetByIDs(ctx context.Context, ids []int64) ([]*Account, error) {
+	var result []*Account
+	for _, id := range ids {
+		if acc, ok := m.accountsByID[id]; ok {
+			result = append(result, acc)
+		}
+	}
+	return result, nil
+}
+
 func (m *mockAccountRepoForGemini) ExistsByID(ctx context.Context, id int64) (bool, error) {
 	if m.accountsByID == nil {
 		return false, nil
diff --git a/backend/internal/service/gemini_oauth_service_test.go b/backend/internal/service/gemini_oauth_service_test.go
index 393812c2..026e6dc2 100644
--- a/backend/internal/service/gemini_oauth_service_test.go
+++ b/backend/internal/service/gemini_oauth_service_test.go
@@ -49,4 +49,3 @@ func TestInferGoogleOneTier(t *testing.T) {
 		})
 	}
 }
-