dsh-workspace-mover: True Cross-Workspace Migration of Sidebar Sessions

The DeepSeek Harness plugin developed by PianoPrince complements native cross-workspace session migration. It supports moving sessions via drag and drop or tool calls, and offers features such as batch migration, group merging, zero-token true migration, a workspace moving wizard, session rescue, and recycle bin backup. Written in pure JavaScript source code, the plugin provides move-history undo and task-center management, and must be installed under Web Profile with a restart. After installation, it can be operated in the grouped view, supports multi-selection with Ctrl/Shift, but cannot move running sessions.