fix(search): no "Not yet inspected" without Ofsted's word; ISI badge (H4)

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

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

@@ -52,3 +52,8 @@ describe('SchoolRow shares the school page flags', () => {
     expect(screen.getByText("Boys' school")).toBeInTheDocument();
   });
 });
+
+it('renders no Ofsted badge for a school with no inspection data (audit H4)', () => {
+  const { container } = render(<SchoolRow school={{ ...base, ofsted_grade: null, ofsted_date: null, ofsted_listed: false, inspectorate: null }} />);
+  expect(container.textContent).not.toMatch(/Not yet inspected|Inspected/);
+});