增加站内信未读提醒和后台通知中心+txt 校验

backend/internal/modules/adminnotification/dto.go

@@ -0,0 +1,32 @@
+package adminnotification
+
+import "time"
+
+type Query struct {
+	AdminUserID uint64
+	OnlyUnread  bool
+	Page        int
+	PageSize    int
+}
+
+type PaginatedResult struct {
+	Items    interface{} `json:"items"`
+	Total    int64       `json:"total"`
+	Page     int         `json:"page"`
+	PageSize int         `json:"page_size"`
+}
+
+type NotificationDTO struct {
+	ID          uint64    `json:"id"`
+	AdminUserID uint64    `json:"admin_user_id"`
+	Type        string    `json:"type"`
+	Title       string    `json:"title"`
+	Content     string    `json:"content"`
+	IsRead      bool      `json:"is_read"`
+	CreatedAt   time.Time `json:"created_at"`
+	UpdatedAt   time.Time `json:"updated_at"`
+}
+
+type UnreadCountDTO struct {
+	UnreadCount int64 `json:"unread_count"`
+}