diff --git a/pkg/channels/feishu/feishu_64.go b/pkg/channels/feishu/feishu_64.go
index a5cc6e16c..851caa263 100644
--- a/pkg/channels/feishu/feishu_64.go
+++ b/pkg/channels/feishu/feishu_64.go
@@ -344,8 +344,8 @@ func (c *FeishuChannel) downloadImage(ctx context.Context, messageID, imageKey s
 	}
 
 	mediaDir := filepath.Join(os.TempDir(), "picoclaw_media")
-	if err := os.MkdirAll(mediaDir, 0o700); err != nil {
-		return "", fmt.Errorf("create media dir: %w", err)
+	if mkErr := os.MkdirAll(mediaDir, 0o700); mkErr != nil {
+		return "", fmt.Errorf("create media dir: %w", mkErr)
 	}
 
 	localPath := filepath.Join(mediaDir, uuid.New().String()[:8]+"_feishu_image")
diff --git a/pkg/channels/feishu/feishu_64_test.go b/pkg/channels/feishu/feishu_64_test.go
index a1732feea..94802ead8 100644
--- a/pkg/channels/feishu/feishu_64_test.go
+++ b/pkg/channels/feishu/feishu_64_test.go
@@ -8,8 +8,6 @@ import (
 	larkim "github.com/larksuite/oapi-sdk-go/v3/service/im/v1"
 )
 
-func strPtr(s string) *string { return &s }
-
 func TestExtractFeishuImageKey(t *testing.T) {
 	tests := []struct {
 		name    string