dsh-plugin-auth-webserver: Adds Web login, cookie sessions, and Basic Auth fallback to DSH Web service

dsh-plugin-auth-webserver is a native web authentication plugin for DeepSeek Harness (DSH), designed to provide an authentication solution for web services that is independent of browser native popups and compatible with CLI, curl, and automation clients. The plugin is released under the MIT license, featuring a DSH-style login page, HMAC cookie-based session management and logout, a Web GUI settings card, dual-mode authentication, and WebSocket protection. It specifically retains HTTP Basic Auth as a fallback mechanism for CLI and automation APIs, supports remote IP privileged RPC trust delegation and Web Crypto UUID auto-fill, and is compatible with both Chinese and English interfaces. Installation