fix: 使用@Autowired字段注入解决循环依赖

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

@@ -40,8 +40,10 @@ public class TaskApprovalService {
     private final PlatformMapper platformMapper;
     private final NotificationService notificationService;
     private final TeamScorePoolService teamScorePoolService;
+    
+    @org.springframework.beans.factory.annotation.Autowired
     @org.springframework.context.annotation.Lazy
-    private final TaskService taskService;
+    private TaskService taskService;
     private final ConfigService configService;
     private final ObjectMapper objectMapper;
     private final DingTalkService dingTalkService;

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

@@ -64,8 +64,10 @@ public class TaskService {
     private final com.designhub.mapper.DepartmentMapper departmentMapper;
     private final com.designhub.util.WorkHoursCalculator workHoursCalculator;
     private final com.designhub.mapper.DelayPenaltyRecordMapper delayPenaltyRecordMapper;
+    
+    @org.springframework.beans.factory.annotation.Autowired
     @org.springframework.context.annotation.Lazy
-    private final TaskApprovalService taskApprovalService;
+    private TaskApprovalService taskApprovalService;
 
     /**
      * 创建任务