dsh-auto-reconnect: DSH Web Client Disconnection and Zombie Connection Fix Plugin

The official connection controller in DeepSeek Harness is prone to infinite loops and has a “zombie connection” blind spot. The dsh-auto-reconnect plugin monitors browser visibility and focus events to automatically recover from terminal disconnections and silent drops. It runs entirely on the client side, requires no build step, and does not modify the official package, while allowing reconnection policies and logs to be adjusted via localStorage. Installation requires a process restart; compatibility with specific versions has been verified, and the plugin aims to improve connection stability in networked environments.