DeepSeek Harness Standalone Session Plugin: Workspace-Free Mode

The DSH plugin `dsh-plugin-no-workspace` addresses the pain point of DeepSeek Harness forcing conversations into groups by treating workspace-free conversations as first-class citizens. The plugin achieves compatibility by wrapping the native slot and supports conversation persistence, moving conversations out of a workspace without data loss, and data security. It does not create fake folders, preserves native sidebar functionality, and supports multilingual environments. Users can install the plugin via a command and restart DSH to use it, making it suitable for scenarios that require independent conversations. The plugin is compatible with DSH version 0.1.5-rc.2.