DeepSeek Harness (DSH) Plugin: dsh-qol UX Improvements

`dsh-qol` is a quality-of-life plugin for the DeepSeek Harness Web GUI, specifically designed to address mobile interaction pain points. It uses a pure client-side architecture and improves usability through behavior corrections. Core features include navigation and session management (drag-to-reorder support in the top tab bar and swipe gestures in the sidebar), input keyboard adaptation (fixing viewport and keyboard-occlusion issues), touch feedback optimization (eliminating click delays and fixing drag stuttering), and a display settings rewrite. The plugin applies all settings instantly without a page refresh through an “attribute master switch” mechanism, and is fully compatible with desktop environments.