Merge origin/main into german/navara

Brings the Active Fires intensity work: the FRP filter, the confidence
switch, the ember-to-white-hot ramp and the far-zoom heatmap.

The filter, switch and ramp work on both engines. The heatmap drapes on
Cesium through the layer's Cesium renderer, which also fades the markers
across the hand-off; it goes with that renderer on an engine switch and is
built again on the next Cesium globe. Navara keeps heat cells for the far
bands, now coloured on the FRP ramp.

scripts/format-scope.json

@@ -420,6 +420,7 @@
   "src/layers/firms/cards.js",
   "src/layers/firms/index.js",
   "src/layers/firms/ingestion.js",
+  "src/layers/firms/heatVisibility.test.mjs",
   "src/layers/firms/lifecycle.js",
   "src/layers/firms/model.js",
   "src/layers/firms/policy.js",
@@ -1506,6 +1507,10 @@
   "scripts/qa-installation-stencil.mjs",
   "scripts/qa-installation-stencil-entry.mjs",
   "src/layers/installations/render/navaraStencilBatch.test.mjs",
+  "src/data/firmsIntensity.js",
+  "src/data/firmsIntensity.test.mjs",
+  "src/ui/layerPanel/RowSwitch.vue",
+  "src/ui/layerPanel/RowSlider.vue",
   "src/sources/phaseTiming.test.mjs",
   "scripts/build-census-places.mjs",
   "src/data/placeBoundaries.test.mjs",