dsh-global-task-list: DeepSeek Harness Global Task Library Plugin

`dsh-global-task-list` is a plugin designed for DeepSeek Harness to address issues such as fragmented tasks, invisible progress, and state desynchronization. Core features include: 1. **Task CRUD and Persistence**: Provides `task_add/list/update/delete` tools, with tasks stored in a cross-session `storageDomain` to support long-term maintenance. 2. **Persistent Floating Panel**: A browser-side panel located in the bottom-right corner that subscribes to SSE in real-time to refresh task status, supporting modification, deletion, and viewing of structured content. 3. **Background Job Synchronization**: Associates tasks via `jobId` to automatically sync terminal states of background jobs (such as completion or failure), adapting to master-slave Agent collaboration workflows. 4. **Generative UI**