DeepSeek Harness chat history and session management: search archives, restore conversations, and delete safely

查看、搜索和恢复已归档会话，支持按工作区批量归档、备份导入导出与回收站管理。

dsh Web UI admin plugin: eleven management panels (extensions, skills, MCP servers, subagents, commands, hooks, automation - cron / webhook / workflow, sessions & web search, usage dashboard, todo dock) inside the official dsh settings UI