@az7627/dsh-token-usage: DeepSeek Harness plugin for tracking token usage in the web chat view

`@az7627/dsh-token-usage` is an MIT-licensed plugin for DeepSeek Harness (DSH) designed to provide fine-grained token usage statistics via a Web conversation view. It is available as a standalone package, with its core functionality being to provide a "Usage Statistics" entry in the session header that opens a right-side drawer displaying an ECharts-based stacked bar chart by time slot. It supports statistics for the current, multi-selected, or all historical conversations. Time granularity options include 15 minutes, 1 hour, or 1 day, with time ranges covering the last 7 days, 30 days, or all history. The data presentation precisely breaks down usage into three categories: cache input, input (including cache writes), and output, supporting totals down to the unit and per-conversation details. Data is sourced from session log replay, and historical data is also viewable. Users can...