fix: 完善所有通知场景的钉钉推送

- NotificationService: sendScoreNotification/sendSystemNotification/batchSendNotification 添加钉钉推送
- TaskService: 补充任务提交/审核通过/审核驳回/任务取消的通知
- 确保所有个人通知都能推送到钉钉工作通知

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

@@ -78,6 +78,16 @@ public class NotificationService {
     @Transactional(rollbackFor = Exception.class)
     public void batchSendNotification(List<Long> receiverIds, String title, String content, 
                                       String notificationType, String relatedType, Long relatedId) {
+        batchSendNotification(receiverIds, title, content, notificationType, relatedType, relatedId, true);
+    }
+    
+    /**
+     * 批量发送通知（可选钉钉推送）
+     */
+    @Transactional(rollbackFor = Exception.class)
+    public void batchSendNotification(List<Long> receiverIds, String title, String content, 
+                                      String notificationType, String relatedType, Long relatedId,
+                                      boolean pushDingtalk) {
         for (Long receiverId : receiverIds) {
             Notification notification = new Notification();
             notification.setReceiverId(receiverId);
@@ -88,9 +98,16 @@ public class NotificationService {
             notification.setRelatedId(relatedId);
             notification.setIsRead(0);
             notification.setPriority(1); // 普通
+            notification.setPushDingtalk(pushDingtalk ? 1 : 0);
+            
             notificationMapper.insert(notification);
+            
+            // 如果开启了钉钉推送，异步推送
+            if (pushDingtalk) {
+                asyncPushToDingtalk(notification);
+            }
         }
-        log.info("批量发送通知成功: count={}", receiverIds.size());
+        log.info("批量发送通知成功: count={}, pushDingtalk={}", receiverIds.size(), pushDingtalk);
     }
 
     /**
@@ -285,6 +302,7 @@ public class NotificationService {
         notification.setTitle(title);
         notification.setContent(content);
         notification.setLinkUrl("/my-score");
+        notification.setPushDingtalk(1); // 积分通知推送钉钉
         sendNotification(notification);
     }
 
@@ -316,6 +334,7 @@ public class NotificationService {
         notification.setTitle(title);
         notification.setContent(content);
         notification.setPriority(priority != null ? convertPriorityToInt(priority) : 1); // 默认普通
+        notification.setPushDingtalk(1); // 系统通知推送钉钉
         sendNotification(notification);
     }
 

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

@@ -864,7 +864,22 @@ public class TaskService {
         
         taskMapper.updateById(task);
         
-        // TODO: 发送通知给发布人
+        // 发送通知给发布人
+        if (task.getPublisherId() != null) {
+            try {
+                User receiver = userService.getUserById(userId);
+                String receiverName = receiver != null ? 
+                    (receiver.getRealName() != null ? receiver.getRealName() : receiver.getUsername()) : "设计师";
+                notificationService.sendTaskNotification(
+                    task.getPublisherId(),
+                    taskId,
+                    "任务已提交待审核",
+                    String.format("您发布的任务【%s】已由 %s 提交，请及时审核", task.getTitle(), receiverName)
+                );
+            } catch (Exception e) {
+                log.error("发送任务提交通知失败", e);
+            }
+        }
     }
 
     /**
@@ -953,7 +968,30 @@ public class TaskService {
         
         taskMapper.updateById(task);
         
-        // TODO: 发送通知
+        // 发送通知给设计师
+        if (task.getReceiverId() != null) {
+            try {
+                if (approved) {
+                    // 审核通过通知
+                    notificationService.sendTaskNotification(
+                        task.getReceiverId(),
+                        taskId,
+                        "任务审核通过",
+                        String.format("恭喜！您完成的任务【%s】已审核通过，积分已发放", task.getTitle())
+                    );
+                } else {
+                    // 驳回通知
+                    notificationService.sendTaskNotification(
+                        task.getReceiverId(),
+                        taskId,
+                        "任务被驳回",
+                        String.format("您提交的任务【%s】被驳回，原因：%s，请修改后重新提交", task.getTitle(), comment)
+                    );
+                }
+            } catch (Exception e) {
+                log.error("发送任务审核通知失败", e);
+            }
+        }
     }
 
     /**
@@ -986,7 +1024,19 @@ public class TaskService {
             teamScorePoolService.addScore(task.getPublisherDeptId(), task.getScore());
         }
         
-        // TODO: 发送通知
+        // 发送通知给接单设计师
+        if (task.getReceiverId() != null) {
+            try {
+                notificationService.sendTaskNotification(
+                    task.getReceiverId(),
+                    taskId,
+                    "任务已取消",
+                    String.format("任务【%s】已被发起人取消，原因：%s", task.getTitle(), reason != null ? reason : "无")
+                );
+            } catch (Exception e) {
+                log.error("发送任务取消通知失败", e);
+            }
+        }
     }
 
     /**