refactor: update repository interfaces and improve dependency injection

- Refactored repository structures to use interfaces instead of concrete types, enhancing flexibility and testability.
- Updated various repository methods to accept interfaces, allowing for better dependency management.
- Modified wire generation to accommodate new repository interfaces, ensuring proper service injection throughout the application.
- Enhanced handler methods to utilize DTOs for filtering and data handling, improving code clarity and maintainability.

internal/service/system_message_service.go

@@ -26,22 +26,30 @@ type SystemMessageService interface {
 	// 发送系统公告
 	SendSystemAnnouncement(ctx context.Context, userIDs []string, title string, content string) error
 	SendBroadcastAnnouncement(ctx context.Context, title string, content string) error
+
+	// 查询通知（供 Handler 层的 REST API 使用）
+	GetNotifications(receiverID string, page, pageSize int) ([]*model.SystemNotification, int64, error)
+	GetNotificationsByCursor(receiverID string, cursorStr string, pageSize int) ([]*model.SystemNotification, string, bool, error)
+	GetUnreadCount(receiverID string) (int64, error)
+	MarkAsRead(notificationID int64, receiverID string) error
+	MarkAllAsRead(receiverID string) error
+	DeleteNotification(notificationID int64, receiverID string) error
 }
 
 type systemMessageServiceImpl struct {
-	notifyRepo  *repository.SystemNotificationRepository
+	notifyRepo  repository.SystemNotificationRepository
 	pushService PushService
-	userRepo    *repository.UserRepository
-	postRepo    *repository.PostRepository
+	userRepo    repository.UserRepository
+	postRepo    repository.PostRepository
 	cache       cache.Cache
 }
 
 // NewSystemMessageService 创建系统消息服务
 func NewSystemMessageService(
-	notifyRepo *repository.SystemNotificationRepository,
+	notifyRepo repository.SystemNotificationRepository,
 	pushService PushService,
-	userRepo *repository.UserRepository,
-	postRepo *repository.PostRepository,
+	userRepo repository.UserRepository,
+	postRepo repository.PostRepository,
 	cacheBackend cache.Cache,
 ) SystemMessageService {
 	return &systemMessageServiceImpl{
@@ -402,6 +410,51 @@ func (s *systemMessageServiceImpl) createNotification(ctx context.Context, userI
 	return notification, nil
 }
 
+// GetNotifications 获取通知列表（供 Handler 调用）
+func (s *systemMessageServiceImpl) GetNotifications(receiverID string, page, pageSize int) ([]*model.SystemNotification, int64, error) {
+	return s.notifyRepo.GetByReceiverID(receiverID, page, pageSize)
+}
+
+// GetNotificationsByCursor 游标分页获取通知列表（供 Handler 调用）
+func (s *systemMessageServiceImpl) GetNotificationsByCursor(receiverID string, cursorStr string, pageSize int) ([]*model.SystemNotification, string, bool, error) {
+	return s.notifyRepo.GetByReceiverIDCursorLegacy(receiverID, cursorStr, pageSize)
+}
+
+// GetUnreadCount 获取未读数量（供 Handler 调用）
+func (s *systemMessageServiceImpl) GetUnreadCount(receiverID string) (int64, error) {
+	return s.notifyRepo.GetUnreadCount(receiverID)
+}
+
+// MarkAsRead 标记单条为已读（供 Handler 调用）
+func (s *systemMessageServiceImpl) MarkAsRead(notificationID int64, receiverID string) error {
+	err := s.notifyRepo.MarkAsRead(notificationID, receiverID)
+	if err != nil {
+		return err
+	}
+	cache.InvalidateUnreadSystem(s.cache, receiverID)
+	return nil
+}
+
+// MarkAllAsRead 标记全部为已读（供 Handler 调用）
+func (s *systemMessageServiceImpl) MarkAllAsRead(receiverID string) error {
+	err := s.notifyRepo.MarkAllAsRead(receiverID)
+	if err != nil {
+		return err
+	}
+	cache.InvalidateUnreadSystem(s.cache, receiverID)
+	return nil
+}
+
+// DeleteNotification 删除通知（供 Handler 调用）
+func (s *systemMessageServiceImpl) DeleteNotification(notificationID int64, receiverID string) error {
+	err := s.notifyRepo.Delete(notificationID, receiverID)
+	if err != nil {
+		return err
+	}
+	cache.InvalidateUnreadSystem(s.cache, receiverID)
+	return nil
+}
+
 // getActorInfo 获取操作者信息
 func (s *systemMessageServiceImpl) getActorInfo(ctx context.Context, operatorID string) (string, string, error) {
 	// 从用户仓储获取用户信息