- All usage endpoints now accept ?period=today|24h|7d|30d|all|custom with optional &from=ISO&to=ISO for custom ranges - Time-series chart adapts granularity: hourly for today/24h, daily for 7d/30d/all - Analytics and Costs pages have period selector buttons with custom date-range picker - Pricing table on Costs page now only shows models that have actually been used (GET /models?used_only=true) - Cache-bust version bumped to v=6