Zooming in replaced the marker group with a bbox subset, so dense world
views (5k dots) thinned to a handful of pins — or zero on a wrapped world
copy, where currentBBox collapsed to a sliver and the API returned ~nothing.
Cameras only seemed to exist when zoomed out.
- vendor leaflet.markercluster 1.5.3; camera markers now render as numbered
neon-green clusters at low zoom and split into individual dots as you zoom,
so camera coverage is visible at every zoom level (spiderfy at max zoom)
- guard against null lat/lon rows (no phantom markers at 0,0)
- stale-response guard for loadCams/loadFires: rapid wheel zoom can resolve
fetches out of order and a stale bbox response blanked the map
- serve index.html with Cache-Control: no-cache so the browser never keeps
serving a pre-deploy copy after fixes land
