dsh-proxy-pro: DSH Proxy Manager

The DeepSeek Harness (DSH) proxy manager plugin `dsh-proxy-pro` is designed to address blind spots in network request routing during agent development. It consistently routes requests such as model calls, web searches, and web scraping to the system proxy or a custom address, and provides visual toggles and configuration options. Core features include one-click switching in the conversation header, a configurable direct-connection list in the settings page, and a command-line diagnostic tool. Technically, it resolves network failures through a single transport channel, uses an idempotent kernel to fix stalling, and implements a browser trust fence along with a clean uninstall mechanism. The plugin supports installation from npm or GitHub, is simple to configure, and is released under the MIT License.