dsh-web-mobile-fix: Narrow Screen Layout Fix for DeepSeek Harness Web UI

dsh-web-mobile-fix is a mobile layout fix plugin designed specifically for the DeepSeek Harness Web UI. For narrow-screen scenarios with a window width of less than 700px, it addresses issues such as compressed settings panels, sidebar squeezing conversations, cluttered directory selector layouts, and misaligned popup positions through pure client-side CSS overrides. This plugin transforms the settings panel into a full-screen vertical layout, makes the sidebar open in full screen, optimizes the arrangement of directory selector buttons, collapses conversation log buttons, and adjusts dropdowns and menus to display centered. It is licensed under the MIT License, does not modify the product's source code, and is compatible with recent 0.1.x versions. Installation only requires executing the `dsh plugin --profile web add dsh-web-mobile-fix` command and restarting the service to take effect, and removal is