The admin dashboard gets a Quotas tab for the instance default, team
allowances and user overrides, with a notice listing models that cost
limits cannot see. A Quota action on the Users tab shows a user's effective
limits, the layer each comes from and their usage, next to the editor for
their override. Each budget is either not set at that layer, a limit, or
unlimited.
Users with a quota see a usage meter with the reset time on the Analytics
settings page, and a refused chat request shows the used amount, the limit
and the reset time in the user's language.
