Extract the native FIRMS renderer and own its settle timer

Keep fire normalization, LOD, anchors, cards and selection portable while the native renderer owns ground cells, sprites, input and scene disposal. Cancel superseded/removed settle timers and unregister the original sprite collection.

Preserve all ten native raster pairs exactly in dev and preview; record source/click/focus/lifecycle, legacy Metal and full regression evidence with strict comparator sensitivity checks.

src/app/layers/renderers.js

@@ -1,3 +1,4 @@
+import { createFirmsCesiumRenderer } from '../../layers/firms/render/cesium.js';
 import { createEarthquakesCesiumRenderer } from '../../layers/earthquakes/render/cesium.js';
 import { createLaunchesCesiumRenderer } from '../../layers/launches/render/cesium.js';
 // Which engine draws which layer: the layer renderer registry (plan, "layer
@@ -91,6 +92,7 @@ export const layerAvailableOn = (layerId, engineKind) =>
 /** Cesium renderers extracted from their layers (render/cesium.js). */
 export const CESIUM_LAYER_RENDERERS = Object.freeze({
   earthquakes: createEarthquakesCesiumRenderer,
+  'local-firms': createFirmsCesiumRenderer,
   'rocket-launches': createLaunchesCesiumRenderer,
   satellites: createSatellitesCesiumRenderer,
   flights: createFlightsCesiumRenderer,