feat(school-detail): map-blended hero, remove at-a-glance stats

Replace the header's at-a-glance stats row with a location map that sits
atop the hero and blends into the school title. The map is a static,
non-interactive preview (never traps page scroll) with a coral pin; the
whole band — or the inline "View on map ↗" link by the address — opens a
fullscreen, interactive map. Compare floats glassy over the band.

The separate "Location" section (and its nav item) is removed; the map now
lives only in the hero. Schools without lat/long render the header with no
map band, as before.

New: SchoolHeroMap (fullscreen wrapper, forwardRef open handle) +
LeafletHeroMapInner (minimal single-school map with interaction toggle).
Applied to both primary and secondary detail views; dead heroStats/tone/
mapContainer CSS removed (shared .heroStat* card classes kept).

Also drops the orphaned "Latest data" note and does not reintroduce an
Ofsted strip in the hero (it would duplicate the Ofsted section directly
below). Mockup kept at mockups/header-map-hero.html.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

nextjs-app/components/SecondarySchoolDetailView.tsx

@@ -6,12 +6,12 @@
 
 'use client';
 
-import { useEffect, useState } from 'react';
+import { useEffect, useRef, useState } from 'react';
 import { useRouter } from 'next/navigation';
 import dynamic from 'next/dynamic';
 import { useComparison } from '@/hooks/useComparison';
 import { MetricTooltip } from './MetricTooltip';
-import { SchoolMap } from './SchoolMap';
+import { SchoolHeroMap, type SchoolHeroMapHandle } from './SchoolHeroMap';
 
 const PerformanceChart = dynamic(
   () => import('./PerformanceChart').then((m) => m.PerformanceChart),
@@ -23,7 +23,7 @@ import type {
   SchoolAdmissions, SenDetail, Phonics,
   SchoolDeprivation, SchoolFinance, NationalAverages,
 } from '@/lib/types';
-import { formatPercentage, formatProgress, formatAcademicYear, buildOfstedHeroChip } from '@/lib/utils';
+import { formatPercentage, formatProgress, formatAcademicYear } from '@/lib/utils';
 import { DeltaChip } from './DeltaChip';
 import { track, getNavigationSource } from '@/lib/analytics';
 import styles from './SecondarySchoolDetailView.module.css';
@@ -79,6 +79,8 @@ export function SecondarySchoolDetailView({
   ofsted, parentView, census, admissions, senDetail, deprivation, finance, absenceData,
 }: SecondarySchoolDetailViewProps) {
   const router = useRouter();
+  // Hero map — the "View on map" link opens its fullscreen view.
+  const heroMapRef = useRef<SchoolHeroMapHandle>(null);
   const { addSchool, removeSchool, isSelected } = useComparison();
   const isInComparison = isSelected(schoolInfo.urn);
 
@@ -159,7 +161,6 @@ export function SecondarySchoolDetailView({
   if (yearlyData.length > 1) navItems.push({ id: 'history', label: 'History' });
   if (hasParents) navItems.push({ id: 'parents', label: 'Parents' });
   if (hasWellbeing) navItems.push({ id: 'wellbeing', label: 'Wellbeing' });
-  if (hasLocation) navItems.push({ id: 'location', label: 'Location' });
   if (hasFinance) navItems.push({ id: 'finances', label: 'Finances' });
 
   // Track active section as user scrolls
@@ -200,17 +201,8 @@ export function SecondarySchoolDetailView({
     return subs.length >= 3 && subs.every(v => v === ofsted.overall_effectiveness);
   })();
 
-  // ── Hero signal chip & stats ─────────────────────────────────────────
-  const ofstedHeroChip = buildOfstedHeroChip(ofsted);
-  const heroAtt8 = latestResults?.attainment_8_score ?? null;
+  // National Attainment 8 baseline for the "Results Over Time" chart.
   const heroAtt8Nat = secondaryAvg.attainment_8_score ?? null;
-  const heroAcademicYear = latestResults ? formatAcademicYear(latestResults.year) : '';
-
-  // Scorecard renders if any tile has content, so a results-less school still
-  // shows its Ofsted signal (previously carried by the now-removed chip strip).
-  const hasHeroStats = heroAtt8 != null
-    || ofsted != null
-    || admissions?.first_preference_offer_pct != null;
 
   return (
     <div className={styles.container}>
@@ -220,8 +212,11 @@ export function SecondarySchoolDetailView({
         <span aria-hidden="true">←</span> Back
       </button>
 
-      {/* ── Header ─────────────────────────────────────── */}
-      <header className={styles.header}>
+      {/* ── Header — the location map band blends into the school title ── */}
+      <header className={`${styles.header}${hasLocation ? ` ${styles.headerHasMap}` : ''}`}>
+        {hasLocation && (
+          <SchoolHeroMap ref={heroMapRef} lat={schoolInfo.latitude!} lng={schoolInfo.longitude!} />
+        )}
         <div className={styles.headerContent}>
           <div className={styles.titleSection}>
             <h1 className={styles.schoolName}>{schoolInfo.school_name}</h1>
@@ -247,6 +242,18 @@ export function SecondarySchoolDetailView({
             {schoolInfo.address && (
               <p className={styles.address}>
                 {schoolInfo.address}{schoolInfo.postcode && `, ${schoolInfo.postcode}`}
+                {hasLocation && (
+                  <>
+                    {' · '}
+                    <button
+                      type="button"
+                      className={styles.mapLink}
+                      onClick={() => { heroMapRef.current?.open(); track('section_nav_used', { section: 'location', via: 'hero_link' }); }}
+                    >
+                      View on map ↗
+                    </button>
+                  </>
+                )}
               </p>
             )}
             <div className={styles.headerDetails}>
@@ -290,55 +297,6 @@ export function SecondarySchoolDetailView({
             </button>
           </div>
         </div>
-
-        {/* At-a-glance stats row — the single home for the headline numbers.
-            Shows whenever any tile has content (results, Ofsted, or admissions),
-            so schools without KS4 results still carry their Ofsted signal. */}
-        {hasHeroStats && (
-          <div className={styles.heroStats}>
-            {heroAtt8 != null && (
-              <div className={styles.heroStat}>
-                <div className={styles.heroStatNumber}>{heroAtt8.toFixed(1)}</div>
-                <div className={styles.heroStatLabel}>Attainment 8 score</div>
-                {heroAtt8Nat != null && (
-                  <DeltaChip value={heroAtt8} baseline={heroAtt8Nat} unit="pts" suffix="vs national" />
-                )}
-              </div>
-            )}
-
-            {ofsted && (
-              <div className={styles.heroStat}>
-                <div className={`${styles.heroStatNumberSerif} ${styles[`tone-${ofstedHeroChip.tone}`]}`}>
-                  {ofstedHeroChip.state === 'oeif'
-                    ? ofstedHeroChip.title.replace(/^Ofsted\s+/, '')
-                    : ofstedHeroChip.state === 'reportCard'
-                      ? 'Report Card'
-                      : '—'}
-                </div>
-                <div className={styles.heroStatLabel}>{ofstedHeroChip.subtitle}</div>
-                {ofstedHeroChip.detail && (
-                  <div className={styles.heroStatFoot}>{ofstedHeroChip.detail}</div>
-                )}
-              </div>
-            )}
-
-            {admissions?.first_preference_offer_pct != null && (
-              <div className={styles.heroStat}>
-                <div className={styles.heroStatNumber}>
-                  {Math.round(admissions.first_preference_offer_pct)}%
-                </div>
-                <div className={styles.heroStatLabel}>First-choice offer rate</div>
-                {admissions.oversubscribed && (
-                  <div className={styles.heroStatFoot}>Oversubscribed</div>
-                )}
-              </div>
-            )}
-          </div>
-        )}
-
-        {heroAcademicYear && (
-          <p className={styles.heroDataNote}>Latest data: {heroAcademicYear}</p>
-        )}
       </header>
 
       {/* ── Sticky section navigation ─────────────────────── */}
@@ -943,20 +901,6 @@ export function SecondarySchoolDetailView({
         </section>
       )}
 
-      {/* ── Location ───────────────────────────────────── */}
-      {hasLocation && (
-        <section id="location" className={styles.card}>
-          <h2 className={styles.sectionTitle}>Location</h2>
-          <div className={styles.mapContainer}>
-            <SchoolMap
-              schools={[schoolInfo]}
-              center={[schoolInfo.latitude!, schoolInfo.longitude!]}
-              zoom={15}
-            />
-          </div>
-        </section>
-      )}
-
       {/* ── Finances ───────────────────────────────────── */}
       {hasFinance && finance && (
         <section id="finances" className={styles.card}>