dsh-todo-float-ball: DeepSeek Harness Progress Floating Ball Plugin

`dsh-todo-float-ball` is a client plugin for DeepSeek Harness, designed to address the pain point of limited visibility into agent task progress. It turns a task checklist into a persistent floating ball widget in the bottom-right corner of the screen, supporting real-time display of progress, status, and task details. The plugin offers a rich feature set, including drag-to-position, capsule mode, history archiving, theme system, and dual-channel data synchronization. Through enforced discipline injection and a zero-intrusion design, it enables users to monitor progress at a glance during long-running unattended tasks. It supports both Electron desktop and web environments and is ready to use without configuration.