dsh-token-usage-stats: Token Usage and Cost Statistics for the DSH Web Plugin

`dsh-token-usage-stats` is a DeepSeek Harness (DSH) plugin designed to address the lack of long-term usage summaries in the official interface. It supports cross-session statistics for token consumption and request counts, providing a standalone dashboard and a sidebar entry. Core features include hourly/daily view switching, automatic data refresh, and intelligent pricing (supporting custom pricing and “peak/off-peak” logic based on Beijing Time). Data is sourced from local session logs, and users must configure the currency and model pricing to display costs. After installation, the plugin can be accessed via the sidebar or URL, helping developers monitor consumption trends at a glance.