dsh-alive: Zero-token online status indicator for DeepSeek Harness Web interface

dsh-alive is an MIT-licensed plugin developed specifically for the DeepSeek Harness (dsh) web profile, aimed at solving the issue where the session interface cannot intuitively display backend service status. The plugin registers an in-process HTTP endpoint `/dsh-alive/ping` in the backend and polls it every 15 seconds from the frontend, thereby enabling real-time monitoring of service online status without consuming any LLM tokens or invoking the model. Status dot colors intuitively distinguish service conditions: green represents online, red represents offline, and yellow represents checking. Installation supports the plugin command `dsh plugin --profile web add dsh-alive` or manual local configuration, requiring a Node.js version of 18 or higher. After installation, it is required to...