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hermes-explorigin ff73e58d31 Add toggleable lightning strike layer to the radar map

- 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.

2026-08-27 00:30:25 +00:00

dist

Add toggleable lightning strike layer to the radar map

2026-08-27 00:30:25 +00:00

public

First pass

2026-07-24 01:53:36 +00:00

scripts

First pass

2026-07-24 01:53:36 +00:00

src

Add toggleable lightning strike layer to the radar map