Review story 2.2: coordinate projection and base map loading passes all ACs

All 10 review criteria pass without fixes. Deferred two tech-debt items
(equirectangular distortion at high latitudes, missing dimension assertion
in basemap.load()). Story and sprint-status marked done.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_bmad-output/implementation-artifacts/sprint-status.yaml

@@ -35,7 +35,7 @@
 # - Dev moves story to 'review', then runs code-review (fresh context, different LLM recommended)
 
 generated: 2026-04-22
-last_updated: 2026-04-22  # 2-1 done, 2-2 review, epic-2 in-progress
+last_updated: 2026-04-22  # 2-1 done, 2-2 done, epic-2 in-progress
 project: planeMapper
 project_key: NOKEY
 tracking_system: file-system
@@ -54,7 +54,7 @@ development_status:
   # Epic 2: Live Radar Display
   epic-2: in-progress
   2-1-aircraft-data-model-and-fetcher: done
-  2-2-coordinate-projection-and-base-map-loading: review
+  2-2-coordinate-projection-and-base-map-loading: done
   2-3-home-marker-and-airspace-outlines: backlog
   2-4-altitude-colour-bands-and-aircraft-type-icons: backlog
   2-5-per-aircraft-drawing: backlog