DeepSeek Harness Plugin: Real-Time Cost and Balance Monitoring

`deepseek-cost-usage-status-plugin` is a Cordis plugin designed specifically for the DeepSeek Harness (DSH) Web UI, providing intuitive cost monitoring. It adds a status line below the conversation input area that displays in real time the peak/off-peak period, session cost, spend rate, account balance, and current model information. The plugin supports automatic application of off-peak discounts (50%) and currency conversion, and includes peak-period color indicators. Installation requires DSH version 0.1.0-rc.6 or later and can be completed via the CLI or by installing from a local directory. The plugin relies on the API Key stored in `~/.dsh/.credentials.yaml` to retrieve the balance and is released under the MIT License.