fix(search): tag only what the register records

The secondary row tested the admissions policy with includes('selective'),
which "Non-selective" passes, so every comprehensive (Burntwood, Graveney)
was tagged Selective. It now needs an exact "Selective".

Both rows excluded only "Does not apply" from the religious character, so a
school recorded as "None" got "Faith priority" (Putney High) or a bare
"None" chip (Abacus Belsize Primary). hasReligiousCharacter() treats both of
the register's no-faith values as no faith.

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

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

@@ -65,3 +65,38 @@ describe('SecondarySchoolRow proposed-to-close tag', () => {
     expect(screen.queryByText(/Proposed to close/)).not.toBeInTheDocument();
   });
 });
+
+describe('SecondarySchoolRow admissions tag', () => {
+  it('tags a selective school', () => {
+    render(<SecondarySchoolRow school={{ ...base, admissions_policy: 'Selective' }} />);
+    expect(screen.getByText('Selective')).toBeInTheDocument();
+  });
+
+  it('does not tag a non-selective school as selective', () => {
+    // "Non-selective" contains "selective": a substring test tagged every
+    // comprehensive (Burntwood, Graveney) as Selective.
+    render(<SecondarySchoolRow school={{ ...base, admissions_policy: 'Non-selective' }} />);
+    expect(screen.queryByText('Selective')).not.toBeInTheDocument();
+  });
+
+  it.each(['None', 'Does not apply', '', null])(
+    'gives no faith tag when the religious character is %p',
+    (religious_denomination) => {
+      render(
+        <SecondarySchoolRow
+          school={{ ...base, admissions_policy: 'Not applicable', religious_denomination }}
+        />,
+      );
+      expect(screen.queryByText('Faith priority')).not.toBeInTheDocument();
+    },
+  );
+
+  it('tags a school with a religious character', () => {
+    render(
+      <SecondarySchoolRow
+        school={{ ...base, admissions_policy: 'Not applicable', religious_denomination: 'Church of England' }}
+      />,
+    );
+    expect(screen.getByText('Faith priority')).toBeInTheDocument();
+  });
+});