✨ optimized image list interface

app/aisvc/rpc/internal/logic/aiservice/face_recognition_logic.go

@@ -53,12 +53,9 @@ func (l *FaceRecognitionLogic) FaceRecognition(in *pb.FaceRecognitionRequest) (*
 	}
 	// 提取人脸特征
 	faceFeatures, err := l.svcCtx.FaceRecognizer.RecognizeSingle(toJPEG)
-	if err != nil {
+	if err != nil || faceFeatures == nil {
 		return nil, err
 	}
-	if faceFeatures == nil {
-		return nil, nil
-	}
 
 	hashKey := constant.FaceVectorPrefix + in.GetUserId()
 	// 从 Redis 加载人脸数据