增加站内信未读提醒和后台通知中心+txt 校验

backend/internal/modules/notification/handler.go

@@ -48,6 +48,34 @@ func (h *Handler) List(c *gin.Context) {
 	response.OK(c, result)
 }
 
+func (h *Handler) UnreadCount(c *gin.Context) {
+	userID, ok := currentUserID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	result, err := h.service.UnreadCount(c.Request.Context(), userID)
+	if err != nil {
+		writeNotificationError(c, err)
+		return
+	}
+	response.OK(c, result)
+}
+
+func (h *Handler) MarkAllRead(c *gin.Context) {
+	userID, ok := currentUserID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	count, err := h.service.MarkAllRead(c.Request.Context(), userID)
+	if err != nil {
+		writeNotificationError(c, err)
+		return
+	}
+	response.OK(c, gin.H{"read_count": count})
+}
+
 func (h *Handler) MarkRead(c *gin.Context) {
 	userID, ok := currentUserID(c)
 	if !ok {
@@ -79,6 +107,8 @@ func writeNotificationError(c *gin.Context, err error) {
 	switch {
 	case errors.Is(err, ErrDependencyUnavailable):
 		response.ServiceUnavailable(c, "数据库未连接")
+	case errors.Is(err, ErrNotificationNotFound):
+		response.NotFound(c, "通知不存在")
 	default:
 		response.ServiceUnavailable(c, "通知服务暂时不可用")
 	}