- New src/lib/api/moon.js: fetches daily moon_phase from Open-Meteo
(independent of the NWS/Open-Meteo weather source, since NWS has no moon
data), plus pure helpers: moonName (8 phases), illumination fraction, and
nextMoonPhase, which unwraps the ~29.5-day cycle and interpolates the next
quarter boundary (new/first quarter/full/last quarter), returning its name,
date, and days until it.
- New MoonPhaseCard.svelte: renders an SVG moon (two-circle terminator that
correctly shows crescent/quarter/gibbous shapes), the current phase name,
percent illuminated, and the next phase with date. Caches per-location via
an effect; degrades gracefully when unavailable.
- Wired into WeatherDetail between Sun and UV and Temperature Range.
- 11 unit tests for moonName/illumination/interpolation/nextMoonPhase.
- Verified in headless Chromium: card renders, moon shape correct, no errors.
- Lightning layer on PrecipitationRadar: toggleable ⚡ button (persisted via
showLightning setting). When on, fetches recent strikes from the planned CORS
relay and renders them as markers that pan/zoom with the slippy map.
- New src/lib/api/lightning.js: fetchLightningStrikes() reads
https://cors.thecookiejar.me/lightning?lat&lon&radiusKm&limit (relay NOT
deployed yet) with an 8s abort timeout and graceful failure - never blocks or
crashes the map, shows an unavailable banner instead. Exports pure
projectStrikeToLayer() for Mercator tile-layer marker projection.
- showLightning setting added to DEFAULT_SETTINGS + app store; toggle persists.
- Tests: fetch URL/parsing/error handling + layer projection. 71 total pass.
