dsh-quota-badge: DeepSeek Harness Balance Badge Plugin

dsh-quota-badge is a DSH plugin for DeepSeek Harness, designed to address the lack of a comprehensive entry point for viewing balance and usage in the sidebar. The plugin fetches data from the DeepSeek official API, displaying real-time account balance badges at the bottom of the sidebar with support for multiple currencies such as CNY and USD, and features manual/auto refresh along with a digital wheel animation. In the "Balance Monitoring" section of the settings page, users can view currency details, balance trend charts, and adjust refresh parameters, with data stored locally in JSON files. Additionally, the plugin provides local usage statistics based on session logs and official peak/off-peak pricing, including historical backfill, per-key statistics, daily consumption line charts, and model details, with hover support for viewing the peak/off-peak pricing coordinate system. Installation requires Node.js 18+ and is done via npm.