2 commits

Author	SHA1	Message	Date
jtricerolph	7ab048931f	Split cost/estimate across mid-period tariff changes ... Rate changes are often scheduled ahead of time or confirmed by finance after the fact and backdated — assign-tariff already supported any effective_from date, but cost-calc previously priced a whole period at a single tariff (whichever was in force on the period-end date), silently mispricing the days on the other side of a change. getTariffSegments() finds every tariff assignment overlapping a date range; getMeterCostForPeriod/getMeterEstimateForPeriod now split consumption pro-rata by day count across segments and price each against its own tariff, summing to the period total. Estimates project the remaining days across a future-scheduled change the same way, rather than assuming today's tariff holds for the rest of the period. Also consolidates internal.js's cost/estimate routes (previously their own duplicate calc) onto the same shared functions reports.js and estimates.js use, so the Directors' report can't drift from the in-app numbers. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>	2026-07-26 17:43:45 +00:00
jtricerolph	4fc5230d79	Initial commit — utilities app (meter readings, tariffs, cost tracking) ... Fastify + pg backend, React/TS/Vite frontend. Categories (electric, gas, oil, water), meters with sub-metering rollup, tariffs with time-of-use rate windows, standing charges, Climate Change Levy and VAT, manual reading entry, consumption/cost reports, period cost estimates, and an API-key-gated /api/internal/* surface for the reports app's Directors Report. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>	2026-07-26 17:33:42 +00:00