新增备份监控与定时配置

backend/internal/modules/systemconfig/service_update.go

@@ -12,6 +12,10 @@ func (s *Service) Update(ctx context.Context, actorID uint64, key string, req Up
 	if s.repo == nil {
 		return nil, ErrDependencyUnavailable
 	}
+	// 备份定时只能通过独立接口修改，避免拥有普通系统配置权限的管理员改变备份策略。
+	if strings.HasPrefix(key, "backup.") {
+		return nil, ErrInvalidConfig
+	}
 	if key == "" || (req.Value == "" && key != "integration.paddle_ocr_token") {
 		return nil, ErrInvalidConfig
 	}
@@ -34,3 +38,25 @@ func (s *Service) Update(ctx context.Context, actorID uint64, key string, req Up
 	}
 	return s.repo.Update(ctx, actorID, key, req, meta)
 }
+
+func (s *Service) UpdateBackupSchedule(ctx context.Context, actorID uint64, req BackupScheduleDTO, meta AuditMeta) (*BackupScheduleDTO, error) {
+	if s.repo == nil || req.FullHour < 0 || req.FullHour > 23 || req.FullMinute < 0 || req.FullMinute > 59 || req.BinlogIntervalMinutes < 1 || req.BinlogIntervalMinutes > 5 {
+		return nil, ErrInvalidConfig
+	}
+	updates := []struct {
+		key         string
+		value       string
+		description string
+	}{
+		{"backup.schedule_enabled", strconv.FormatBool(req.Enabled), "在线备份定时任务是否启用"},
+		{"backup.full_hour", strconv.Itoa(req.FullHour), "每日全量备份小时（Asia/Shanghai）"},
+		{"backup.full_minute", strconv.Itoa(req.FullMinute), "每日全量备份分钟（Asia/Shanghai）"},
+		{"backup.binlog_interval_minutes", strconv.Itoa(req.BinlogIntervalMinutes), "binlog 归档间隔分钟（1-5）"},
+	}
+	for _, item := range updates {
+		if _, err := s.repo.Update(ctx, actorID, item.key, UpdateRequest{Value: item.value, Description: item.description}, meta); err != nil {
+			return nil, err
+		}
+	}
+	return &req, nil
+}