Add a Real-time Token Dashboard to DeepSeek Harness with dsh-token-panel

### 译文： dsh-token-panel is a DeepSeek Harness session and message plugin maintained by juhe291, which provides a draggable Token dashboard in the lower right corner of the Web UI. It reads DSH's token metering and session projections, and real-time displays context pressure, per-model costs, and daily/monthly usage. It supports peak-valley pricing, inline editing of budget balance, and local JSONL bookkeeping. This article cross-verifies based on the catalog page and GitHub repository version 0.4.7, explaining the installation commands, configuration items, digital caliber, and security precautions.