dsh-header-controls: Session Top-Right Power Control

`dsh-header-controls` is a static web plugin designed specifically for DeepSeek Harness developers, aimed at addressing the pain point of frequently restarting processes via the command line during development. It injects “Restart” and “Log out” capsule buttons to the left of the session log, providing one-click restart (with automatic refresh), logout with secondary confirmation, skin awareness, and security validation. Installation requires manually creating a symbolic link and configuring `cordis.patch.yml`. The plugin relies on DSH to read startup parameters from its configuration file, supports a fallback mechanism, and is primarily applicable to the DSH dev preview version.