ostar-dsh-left-sidebar: DSH Left Sidebar Workspace Manager

The DeepSeek Harness (DSH) plugin `ostar-dsh-left-sidebar` enhances management capabilities on top of the official left sidebar. It supports bulk deletion, thorough data cleanup, session migration and copying, grouped favorites, drag-and-drop reordering, and locating the current session, while faithfully replicating the official style. Installation requires meeting the Node.js and pnpm version requirements; install it via the command line and restart. The plugin has no build step, uninstalling it does not affect data, but the browser cache must be manually cleared to remove the grouping memory.