fix(search): no LA comparison for independent schools (H2)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

nextjs-app/__tests__/components/LeafletMapInner.test.tsx

@@ -105,3 +105,20 @@ it('puts the card back when the pins are rebuilt for a reason other than the sch
   expect(container.querySelector('.sc-popup')).toHaveTextContent('Southmead Primary School');
   expect(container.querySelectorAll('.sc-pin--selected')).toHaveLength(1);
 });
+
+it('compares a state secondary with its LA average on the card, but not an independent one', () => {
+  const state: School = { ...base, urn: 3, school_name: 'Holland Park School', school_type: 'Academy converter',
+    phase: 'Secondary', local_authority: 'Kensington and Chelsea', attainment_8_score: 60,
+    latitude: 51.5, longitude: -0.2, distance: 0.3 };
+  const independent: School = { ...state, urn: 4, school_name: 'Abbey Gate College',
+    school_type: 'Other independent school', attainment_8_score: 20.4 };
+  const laAverages = { 'Kensington and Chelsea': 54.5 };
+
+  const { container, rerender } = renderMap({ schools: [state, independent], laAverages, selectedUrn: 3 });
+  expect(container.querySelector('.sc-popup')).toHaveTextContent('60.0 Att 8 +5.5 vs LA');
+
+  rerender({ schools: [state, independent], laAverages, selectedUrn: 4 });
+  const card = container.querySelector('.sc-popup')!;
+  expect(card).toHaveTextContent('20.4 Att 8');
+  expect(card).not.toHaveTextContent(/vs LA/);
+});