dsh-peak-price-panel: DeepSeek Harness Peak/Off-Peak Electricity Tariff and Balance Monitoring Plugin

The DeepSeek Harness plugin `dsh-peak-price-panel` is designed to address billing and balance management issues in large model calls. It displays peak and off-peak pricing, balance status, and model unit prices in real time within the sidebar. It supports balance polling and color-coded alerts at three threshold levels, and triggers a linked top-up when the balance is low. By decoupling the pricing table from the code and enabling real-time configuration changes, it helps developers precisely manage costs and mitigate workflow interruption risks.