fix: 进度检查排除流水线任务的主任务，避免错误扣分

backend/src/main/java/com/designhub/service/ProgressCheckService.java

@@ -58,12 +58,14 @@ public class ProgressCheckService {
             LocalDateTime startOfDay = today.atStartOfDay();
             LocalDateTime endOfDay = today.atTime(LocalTime.MAX);
 
-            // 1. 检查主任务
+            // 1. 检查主任务（排除流水线任务，流水线任务只检查子任务）
             List<Task> inProgressTasks = taskMapper.selectList(
                 new LambdaQueryWrapper<Task>()
                     .eq(Task::getStatus, "in_progress")
                     .eq(Task::getDeleted, 0)
                     .isNotNull(Task::getReceiverId)
+                    // 排除流水线任务，流水线任务的进度由子任务决定
+                    .and(w -> w.isNull(Task::getIsPipeline).or().eq(Task::getIsPipeline, 0))
             );
 
             Map<Long, List<String>> userMissedTasks = new HashMap<>();