fix:绍兴站图片损坏导出详情报错

inspect-main/inspect-main-task/src/main/java/com/inspect/task/controller/PatrolTaskController.java

@@ -2656,7 +2656,7 @@ public class PatrolTaskController extends BaseController {
             return output.toByteArray();
         } catch (Exception e) {
             logger.warn("图片下载压缩失败: {}", imagePath, e);
-            return null;
+            return new byte[0];
         }
     }