snapshots

DSH 永久插件：LVAL 工程运行/代码查看/程序版本快照回退 + VTD 虚拟对话树（编辑/重试/分支、消息小版本）+ DET 管理器。A permanent DeepSeek Harness plugin: project run & code viewer, program snapshots, an in-session conversation tree (edit/retry/branches), message micro-versions and a feature manager.