refactor(fires): separate source, rendering and interaction components

TESTING.md

@@ -231,3 +231,9 @@ Software runs validate their assertions but do not establish real-GPU visual
 correctness. Floor-hold retains both mesh and DEM checks: an unavailable mesh
 oracle fails the run even when the DEM check passes. Record the backend with
 any screenshots and run GPU visual checks separately when needed.
+
+FIRMS refactoring can be checked without a configured server key using
+`node scripts/qa-firms.mjs --url http://localhost:4173 --fixtures`. This explicit
+fixture mode exercises populated display, aggregation, cards, keyless and stale
+responses, and selection/camera handoff. It does not establish live-source
+acceptance; omit `--fixtures` with a configured FIRMS key for that check.