adds a new /usage page that lets board operators see how much each ai
provider is consuming across any date window, with per-model breakdowns,
rolling 5h/24h/7d burn windows, weekly budget bars, and a deficit notch
when projected spend is on track to exceed the monthly budget.
- new GET /companies/:id/costs/by-provider endpoint aggregates cost events
by provider + model with pro-rated billing type splits from heartbeat runs
- new GET /companies/:id/costs/window-spend endpoint returns rolling window
spend (5h, 24h, 7d) per provider with no schema changes
- QuotaBar: reusable boxed-border progress bar with green/yellow/red
threshold fill colors and optional deficit notch
- ProviderQuotaCard: per-provider card showing budget allocation bars,
rolling windows, subscription usage, and model breakdown with token/cost
share overlays
- Usage page: date preset toggles (mtd, 7d, 30d, ytd, all, custom),
provider tabs, 30s polling plus ws invalidation on cost_event
- custom date range blocks queries until both dates are selected and
treats boundaries as local-time (not utc midnight) so full days are
included regardless of timezone
- query key to timestamp is floored to the nearest minute to prevent
cache churn on every 30s refetch tick
