Add map view for location search results

Implemented split-view map layout for postcode searches:
- List/Map toggle appears when doing location search
- Map view shows interactive map with school markers on left
- Compact school list on right with distance badges, stats, actions
- Mobile responsive: stacks vertically with map on top
- Updated School type to include distance and total_pupils fields

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nextjs-app/components/SchoolMap.module.css

@@ -19,9 +19,9 @@
 .spinner {
   width: 2rem;
   height: 2rem;
-  border: 3px solid rgba(59, 130, 246, 0.3);
+  border: 3px solid rgba(224, 114, 86, 0.3);
   border-radius: 50%;
-  border-top-color: var(--primary);
+  border-top-color: var(--accent-coral, #e07256);
   animation: spin 0.8s linear infinite;
 }