feat(seo): add school name to URLs, fix sticky nav, collapse compare widget

- URLs now /school/138267-school-name instead of /school/138267
- Bare URN URLs redirect to canonical slug (backward compat)
- Remove overflow-x:hidden that broke sticky tab nav on secondary pages
- ComparisonToast starts collapsed — user must click to open

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nextjs-app/app/school/[slug]/page.tsx

@@ -1,23 +1,25 @@
 /**
  * Individual School Page (SSR)
  * Dynamic route for school details with full SEO optimization
+ * URL format: /school/138267-school-name-here
  */
 
 import { fetchSchoolDetails } from '@/lib/api';
-import { notFound } from 'next/navigation';
+import { notFound, redirect } from 'next/navigation';
 import { SchoolDetailView } from '@/components/SchoolDetailView';
 import { SecondarySchoolDetailView } from '@/components/SecondarySchoolDetailView';
+import { parseSchoolSlug, schoolUrl } from '@/lib/utils';
 import type { Metadata } from 'next';
 
 interface SchoolPageProps {
-  params: Promise<{ urn: string }>;
+  params: Promise<{ slug: string }>;
 }
 
 export async function generateMetadata({ params }: SchoolPageProps): Promise<Metadata> {
-  const { urn: urnString } = await params;
-  const urn = parseInt(urnString);
+  const { slug } = await params;
+  const urn = parseSchoolSlug(slug);
 
-  if (isNaN(urn) || urn < 100000 || urn > 999999) {
+  if (!urn || urn < 100000 || urn > 999999) {
     return {
       title: 'School Not Found',
     };
@@ -27,6 +29,7 @@ export async function generateMetadata({ params }: SchoolPageProps): Promise<Met
     const data = await fetchSchoolDetails(urn);
     const { school_info } = data;
 
+    const canonicalPath = schoolUrl(urn, school_info.school_name);
     const isSecondary = (school_info.phase ?? '').toLowerCase().includes('secondary')
       || (data.yearly_data ?? []).some((d: any) => d.attainment_8_score != null);
     const title = `${school_info.school_name} | ${school_info.local_authority || 'England'}`;
@@ -44,7 +47,7 @@ export async function generateMetadata({ params }: SchoolPageProps): Promise<Met
         title,
         description,
         type: 'website',
-        url: `https://schoolcompare.co.uk/school/${urn}`,
+        url: `https://schoolcompare.co.uk${canonicalPath}`,
         siteName: 'SchoolCompare',
       },
       twitter: {
@@ -53,7 +56,7 @@ export async function generateMetadata({ params }: SchoolPageProps): Promise<Met
         description,
       },
       alternates: {
-        canonical: `https://schoolcompare.co.uk/school/${urn}`,
+        canonical: `https://schoolcompare.co.uk${canonicalPath}`,
       },
     };
   } catch {
@@ -67,11 +70,11 @@ export async function generateMetadata({ params }: SchoolPageProps): Promise<Met
 export const dynamic = 'force-dynamic';
 
 export default async function SchoolPage({ params }: SchoolPageProps) {
-  const { urn: urnString } = await params;
-  const urn = parseInt(urnString);
+  const { slug } = await params;
+  const urn = parseSchoolSlug(slug);
 
   // Validate URN format
-  if (isNaN(urn) || urn < 100000 || urn > 999999) {
+  if (!urn || urn < 100000 || urn > 999999) {
     notFound();
   }
 
@@ -86,6 +89,12 @@ export default async function SchoolPage({ params }: SchoolPageProps) {
 
   const { school_info, yearly_data, absence_data, ofsted, parent_view, census, admissions, sen_detail, phonics, deprivation, finance } = data;
 
+  // Redirect bare URN to canonical slug URL
+  const canonicalSlug = schoolUrl(urn, school_info.school_name).replace('/school/', '');
+  if (slug !== canonicalSlug) {
+    redirect(`/school/${canonicalSlug}`);
+  }
+
   const isSecondary = (school_info.phase ?? '').toLowerCase().includes('secondary')
     || yearly_data.some((d: any) => d.attainment_8_score != null);
 

nextjs-app/app/sitemap.ts

@@ -5,6 +5,7 @@
 
 import { MetadataRoute } from 'next';
 import { fetchSchools } from '@/lib/api';
+import { schoolUrl } from '@/lib/utils';
 
 const BASE_URL = 'https://schoolcompare.co.uk';
 
@@ -39,7 +40,7 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
     });
 
     const schoolPages: MetadataRoute.Sitemap = schoolsData.schools.map((school) => ({
-      url: `${BASE_URL}/school/${school.urn}`,
+      url: `${BASE_URL}${schoolUrl(school.urn, school.school_name)}`,
       lastModified: new Date(),
       changeFrequency: 'monthly',
       priority: 0.6,

nextjs-app/components/ComparisonToast.tsx

@@ -9,7 +9,7 @@ import styles from './ComparisonToast.module.css';
 export function ComparisonToast() {
   const { selectedSchools, clearAll, removeSchool } = useComparison();
   const [mounted, setMounted] = useState(false);
-  const [collapsed, setCollapsed] = useState(false);
+  const [collapsed, setCollapsed] = useState(true);
   const pathname = usePathname();
 
   useEffect(() => {

nextjs-app/components/ComparisonView.tsx

@@ -13,7 +13,7 @@ import { SchoolSearchModal } from './SchoolSearchModal';
 import { EmptyState } from './EmptyState';
 import { LoadingSkeleton } from './LoadingSkeleton';
 import type { ComparisonData, MetricDefinition, School } from '@/lib/types';
-import { formatPercentage, formatProgress, CHART_COLORS } from '@/lib/utils';
+import { formatPercentage, formatProgress, CHART_COLORS, schoolUrl } from '@/lib/utils';
 import { fetchComparison } from '@/lib/api';
 import styles from './ComparisonView.module.css';
 
@@ -305,7 +305,7 @@ export function ComparisonView({
                     ×
                   </button>
                   <h2 className={styles.schoolName}>
-                    <a href={`/school/${school.urn}`}>{school.school_name}</a>
+                    <a href={schoolUrl(school.urn, school.school_name)}>{school.school_name}</a>
                   </h2>
                   <div className={styles.schoolMeta}>
                     {school.local_authority && (

nextjs-app/components/HomeView.tsx

@@ -15,6 +15,7 @@ import { EmptyState } from './EmptyState';
 import { useComparisonContext } from '@/context/ComparisonContext';
 import { fetchSchools, fetchLAaverages } from '@/lib/api';
 import type { SchoolsResponse, Filters, School } from '@/lib/types';
+import { schoolUrl } from '@/lib/utils';
 import styles from './HomeView.module.css';
 
 interface HomeViewProps {
@@ -316,7 +317,7 @@ function CompactSchoolItem({ school, onAddToCompare, isInCompare }: CompactSchoo
     <div className={styles.compactItem}>
       <div className={styles.compactItemContent}>
         <div className={styles.compactItemHeader}>
-          <a href={`/school/${school.urn}`} className={styles.compactItemName}>
+          <a href={{schoolUrl(school.urn, school.school_name)}} className={styles.compactItemName}>
             {school.school_name}
           </a>
           {school.distance !== undefined && school.distance !== null && (
@@ -352,7 +353,7 @@ function CompactSchoolItem({ school, onAddToCompare, isInCompare }: CompactSchoo
         >
           {isInCompare ? '✓ Comparing' : '+ Compare'}
         </button>
-        <a href={`/school/${school.urn}`} className="btn btn-tertiary btn-sm">
+        <a href={{schoolUrl(school.urn, school.school_name)}} className="btn btn-tertiary btn-sm">
           View
         </a>
       </div>

nextjs-app/components/LeafletMapInner.tsx

@@ -9,6 +9,7 @@ import { useEffect, useRef } from 'react';
 import L from 'leaflet';
 import 'leaflet/dist/leaflet.css';
 import type { School } from '@/lib/types';
+import { schoolUrl } from '@/lib/utils';
 
 // Fix for default marker icons in Next.js
 delete (L.Icon.Default.prototype as any)._getIconUrl;
@@ -60,7 +61,7 @@ export default function LeafletMapInner({ schools, center, zoom, onMarkerClick }
             <strong style="font-size: 14px; display: block; margin-bottom: 8px;">${school.school_name}</strong>
             ${school.local_authority ? `<div style="font-size: 12px; color: #666; margin-bottom: 4px;">${school.local_authority}</div>` : ''}
             ${school.school_type ? `<div style="font-size: 12px; color: #666; margin-bottom: 8px;">${school.school_type}</div>` : ''}
-            <a href="/school/${school.urn}" style="display: inline-block; margin-top: 8px; padding: 6px 12px; background: #e07256; color: white; text-decoration: none; border-radius: 4px; font-size: 12px;">View Details</a>
+            <a href="${schoolUrl(school.urn, school.school_name)}" style="display: inline-block; margin-top: 8px; padding: 6px 12px; background: #e07256; color: white; text-decoration: none; border-radius: 4px; font-size: 12px;">View Details</a>
           </div>
         `;
 

nextjs-app/components/RankingsView.tsx

@@ -8,7 +8,7 @@
 import { useRouter, usePathname, useSearchParams } from 'next/navigation';
 import { useComparison } from '@/hooks/useComparison';
 import type { RankingEntry, Filters, MetricDefinition } from '@/lib/types';
-import { formatPercentage, formatProgress } from '@/lib/utils';
+import { formatPercentage, formatProgress, schoolUrl } from '@/lib/utils';
 import { EmptyState } from './EmptyState';
 import styles from './RankingsView.module.css';
 
@@ -267,7 +267,7 @@ export function RankingsView({
                         )}
                       </td>
                       <td className={styles.schoolCell}>
-                        <a href={`/school/${ranking.urn}`} className={styles.schoolLink}>
+                        <a href={{schoolUrl(ranking.urn, ranking.school_name)}} className={styles.schoolLink}>
                           {ranking.school_name}
                         </a>
                       </td>
@@ -277,7 +277,7 @@ export function RankingsView({
                         <strong>{displayValue}</strong>
                       </td>
                       <td className={styles.actionCell}>
-                        <a href={`/school/${ranking.urn}`} className="btn btn-tertiary btn-sm">View</a>
+                        <a href={{schoolUrl(ranking.urn, ranking.school_name)}} className="btn btn-tertiary btn-sm">View</a>
                         <button
                           onClick={() => handleAddToCompare(ranking)}
                           disabled={alreadyInComparison}

nextjs-app/components/SchoolCard.tsx

@@ -5,7 +5,7 @@
 
 import Link from 'next/link';
 import type { School } from '@/lib/types';
-import { formatPercentage, formatProgress, calculateTrend, getTrendColor } from '@/lib/utils';
+import { formatPercentage, formatProgress, calculateTrend, getTrendColor, schoolUrl } from '@/lib/utils';
 import styles from './SchoolCard.module.css';
 
 interface SchoolCardProps {
@@ -25,7 +25,7 @@ export function SchoolCard({ school, onAddToCompare, onRemoveFromCompare, showDi
     <div className={`${styles.card} ${isInCompare ? styles.cardInCompare : ''}`}>
       <div className={styles.header}>
         <h3 className={styles.title}>
-          <Link href={`/school/${school.urn}`}>
+          <Link href={{schoolUrl(school.urn, school.school_name)}}>
             {school.school_name}
           </Link>
         </h3>
@@ -146,7 +146,7 @@ export function SchoolCard({ school, onAddToCompare, onRemoveFromCompare, showDi
       )}
 
       <div className={styles.actions}>
-        <Link href={`/school/${school.urn}`} className="btn btn-primary">
+        <Link href={{schoolUrl(school.urn, school.school_name)}} className="btn btn-primary">
           View Details
         </Link>
         {onAddToCompare && (

nextjs-app/components/SchoolRow.tsx

@@ -9,7 +9,7 @@
  */
 
 import type { School } from '@/lib/types';
-import { formatPercentage, formatProgress, calculateTrend } from '@/lib/utils';
+import { formatPercentage, formatProgress, calculateTrend, schoolUrl } from '@/lib/utils';
 import { progressBand } from '@/lib/metrics';
 import styles from './SchoolRow.module.css';
 
@@ -61,7 +61,7 @@ export function SchoolRow({
 
         {/* Line 1: School name + Ofsted badge */}
         <div className={styles.line1}>
-          <a href={`/school/${school.urn}`} className={styles.schoolName}>
+          <a href={{schoolUrl(school.urn, school.school_name)}} className={styles.schoolName}>
             {school.school_name}
           </a>
           {school.ofsted_grade && (
@@ -155,7 +155,7 @@ export function SchoolRow({
 
       {/* Right: actions, vertically centred */}
       <div className={styles.rowActions}>
-        <a href={`/school/${school.urn}`} className="btn btn-tertiary btn-sm">
+        <a href={{schoolUrl(school.urn, school.school_name)}} className="btn btn-tertiary btn-sm">
           View
         </a>
         {(onAddToCompare || onRemoveFromCompare) && (

nextjs-app/components/SecondarySchoolDetailView.module.css

@@ -2,7 +2,6 @@
 
 .container {
   width: 100%;
-  overflow-x: hidden;
 }
 
 /* ── Header ──────────────────────────────────────────── */

nextjs-app/components/SecondarySchoolRow.tsx

@@ -11,7 +11,7 @@
 'use client';
 
 import type { School } from '@/lib/types';
-
+import { schoolUrl } from '@/lib/utils';
 import styles from './SecondarySchoolRow.module.css';
 
 const OFSTED_LABELS: Record<number, string> = {
@@ -73,7 +73,7 @@ export function SecondarySchoolRow({
 
         {/* Line 1: School name + Ofsted badge */}
         <div className={styles.line1}>
-          <a href={`/school/${school.urn}`} className={styles.schoolName}>
+          <a href={{schoolUrl(school.urn, school.school_name)}} className={styles.schoolName}>
             {school.school_name}
           </a>
           {school.ofsted_grade && (
@@ -155,7 +155,7 @@ export function SecondarySchoolRow({
 
       {/* Right: actions */}
       <div className={styles.rowActions}>
-        <a href={`/school/${school.urn}`} className="btn btn-tertiary btn-sm">
+        <a href={{schoolUrl(school.urn, school.school_name)}} className="btn btn-tertiary btn-sm">
           View
         </a>
         {(onAddToCompare || onRemoveFromCompare) && (

nextjs-app/lib/utils.ts

@@ -20,6 +20,28 @@ export function slugify(text: string): string {
     .trim();
 }
 
+/**
+ * Build a school URL path: /school/123456-school-name (capped at ~80 chars total)
+ */
+const MAX_SLUG_LENGTH = 60;
+
+export function schoolUrl(urn: number, schoolName?: string): string {
+  if (!schoolName) return `/school/${urn}`;
+  let slug = slugify(schoolName);
+  if (slug.length > MAX_SLUG_LENGTH) {
+    slug = slug.slice(0, MAX_SLUG_LENGTH).replace(/-+$/, '');
+  }
+  return `/school/${urn}-${slug}`;
+}
+
+/**
+ * Extract the URN from a school slug (e.g. "138267-some-school-name" → 138267)
+ */
+export function parseSchoolSlug(slug: string): number | null {
+  const match = slug.match(/^(\d{6})/);
+  return match ? parseInt(match[1], 10) : null;
+}
+
 /**
  * Escape HTML to prevent XSS
  */