dsh-subagent-workspace-ui: DeepSeek Harness Workspace Subagent Manager

`dsh-subagent-workspace-ui` is a Deep Harness Web plugin designed to centrally manage distributed subagents. It provides a searchable panel, supports filtering by name, ID, and more, and enables batch operations such as pausing, archiving, and viewing live output for subagents. The plugin requires no compile flags and includes UI-compatible configuration files to help developers efficiently track and manage subagents.