dsh-ui-auth — DeepSeek Harness Web UI Authentication Gateway Plugin

The `dsh-ui-auth` plugin for DeepSeek Harness (DSH) provides secure gateway authentication for the Web UI. It supports full interface interception (HTTP/WS), TOTP/passkey login, user permission isolation, and administrator configuration. After installation using the standard commands, the system automatically creates an administrator account, and new users must register with an invitation code. Passwords are hashed using PBKDF2, a login lockout mechanism is supported, and the plugin is fully compatible with the latest version of DSH.