v1.0.0

给 DSH 加一个生成速度仪表盘：半圆表盘与流动曲线趋势图，一秒 50 次获取 tok/s，测量更细更精准，可随时用标题栏按钮收起。

A generation-speed gauge for DSH: a half-circle dial and a flowing trend curve, sampling tok/s 50 times a second for finer, more accurate measurement; tuck it away with a header button at any time.

• 需要 DSH >= 0.2.1-rc.2 / requires DSH >= 0.2.1-rc.2
• 桌面版与网页版都可用 / works in both desktop and web builds