新增备份监控与定时配置

backend/internal/modules/systemconfig/repository.go

@@ -51,6 +51,10 @@ var defaultConfigs = []defaultConfig{
 	{Key: cooperationFeedbackConfigKey, Value: defaultCooperationFeedbackConfigValue(), Description: "首页 合作与反馈入口配置 JSON（标题/副标题/展示图片）"},
 	{Key: publishOptionsConfigKey, Value: defaultPublishOptionsConfigValue(), Description: "发布页选项配置 JSON"},
 	{Key: salePriceConfigKey, Value: defaultSalePriceConfigValue(), Description: "内部出售定价规则 JSON"},
+	{Key: "backup.schedule_enabled", Value: "true", Description: "在线备份定时任务是否启用"},
+	{Key: "backup.full_hour", Value: "4", Description: "每日全量备份小时（Asia/Shanghai）"},
+	{Key: "backup.full_minute", Value: "30", Description: "每日全量备份分钟（Asia/Shanghai）"},
+	{Key: "backup.binlog_interval_minutes", Value: "1", Description: "binlog 归档间隔分钟（1-5）"},
 }
 
 var adminVisibleConfigKeys = []string{