dsh-cost-balance-pro: Session cost/balance statistics bar below the input box

dsh-cost-balance-pro is a DSH web plugin (Author: kingcharleslzy-ai, MIT License) that displays session costs and account balance in real-time via a statistics bar below the input box. Clicking it expands details such as cache hit rate and token counts. Regarding DeepSeek's peak-valley billing starting from August 17, 2026, the plugin automatically switches pricing based on the current time period.