Session management for DeepSeek Harness: list every stored session with its on-disk size, search by title, session id, kind tag, workspace or agent preset, and group them by age or by workspace. Permanently delete one or many at once — the log artifact, the workspace account entry and the search index rows — behind a two-step confirm, with a re-check after every deletion. Subagent sessions can be shown on demand; Side Chat threads stay hidden, and sessions live in the current app run are refused until restart.