dsh-jiey-browser: Enable DeepSeek Harness to use real Jiey Browser via MCP

**Introduction** When integrating browser capabilities into DeepSeek Harness (DSH) agents, the typical approach is Playwright: a headless environment with a separate automation profile. The login state and cookies are completely isolated from the user's daily browser, and installation requires running `npx playwright install` first. If a task requires reusing sites that are already logged in, this path involves a lot of extra work. dsh-jiey-browser takes a different approach: it hands over the real Jiey Chromium (i.e., the user's own browser) to the agent via MCP, rather than spawning a separate headless environment. The following sections introduce what this plugin can do, how to install it, and how to use it. # What is this? dsh-ji...