youyou-work-hours: Clock-in/out and Work Hour Statistics in DSH Client

The DSH client plugin maintained by mryouyouHK places features such as clock-in/out, configurable shifts, current and average working hours, lateness rate, and three review modes (calendar/year/list) into the sidebar "Timer" overlay. The accumulated working hours do not deduct break times; average working hours are calculated based only on fully clocked-in dates; and the lateness rate is calculated only on working days. It includes built-in statutory holidays and make-up days for 2025–2026. Data is stored locally in the browser's `localStorage` by default (key: `work-hours:data:v1`), and configuration can be exported and imported. Timeout alerts are handled by the Notification Center plugin. The README does not provide a command-line installation string; the integration method involves pointing `plugin_manager`'s `install_bundle` to the repository directory. It takes effect after the Host is restarted or re-enabled; a client-side page refresh is sufficient.