New /api/usage/live endpoint derives instantaneous-ish kW from the most
recent interval reading, shown as a solar -> house/grid flow diagram
that updates every 30s and flips direction/color between exporting and
importing. /api/usage/summary now also reports net revenue for the
selected period, reusing the existing costing engine against the
current plan.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
FastAPI app that pulls interval usage from Sungrow iSolarCloud (OAuth2),
caches AER Consumer Data Right electricity plan data, and compares actual
metered usage against every available plan to estimate real annual cost
(TOU, tiered feed-in, and flat tariffs).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
