dsh-peak-hours: Display Beijing peak hours badge in DSH session top bar.

## Introduction The philosophy of DeepSeek Harness (DSH) is "everything is a plugin," theoretically allowing every corner of the conversation interface to be extended by plugins. However, actually writing a top-bar plugin involves handling several things: registering your own component to the conversation top-bar toolbar, adapting to light/dark themes, and persisting user settings—where the latter step has extra restrictions for third-party plugins. dsh-peak-hours is a small plugin that addresses all these issues: it displays a "Peak Hours" status badge in the conversation top bar, determines whether the current time is between 09:00–12:00 or 14:00–18:00 based on Beijing Time, and includes the current Beijing time. You can see the status as soon as you open the conversation without needing to switch away to check the time. The following introduces it in the order of features, principle, installation, and usage.