Quota/usage meter (e.g. 128 / 600 分钟). Turns warning-orange past `warnAt` (default 90%).

```jsx
const { ProgressBar } = window.DuduDesignSystem_2e0172;
<ProgressBar value={128} max={600} />
```

Pair with a `13px text-2` label row above: 「本月已用 128 / 600 分钟」.
