Introducing the DSH Usage & Export Plugin

`dsh-usage-export` is a web plugin designed specifically for DeepSeek Harness, aimed at addressing developers' needs for cost monitoring and document export. It displays conversation costs, peak/off-peak periods, and complete statistical metrics in real time in the local browser, avoiding interface truncation. It supports exporting visible content to Markdown or PDF and provides content range selection and character-level adjustment, ensuring privacy and security. It is a lightweight and practical utility in the DeepSeek Harness ecosystem.