Tools – AI Billing (`/tools/ai-billing`)

Purpose

Give super users visibility into AI usage and cost estimates across providers (OpenAI, Gemini, etc.).
Combine live billing summaries with cached pricing tables so teams can forecast spend.

Fetches usage summary from /ai/billing/summary and pricing from /ai/pricing/fetch via apiFetch.
Access restricted to super users; non-authorised users are redirected away.

Summary header shows total window, last updated timestamp, and aggregate usage metrics.
Provider cards list token counts, effective rates, bill estimates, and model-level breakdowns.
Pricing tables surface per-model context length, availability status, and USD rates (input/output/embedding).
Loading skeletons cover initial fetch; alerts display when API calls fail; manual “Refresh” button re-queries endpoints.