seo: repair audit findings for the home description, estate link, and title

src/app/layout.tsx

@@ -16,7 +16,7 @@ const defaultDescription = `A compilation archive of guitarists' rigs and signal
 
 export const metadata: Metadata = {
   metadataBase: new URL(SITE_URL),
-  title: { default: 'Suede DNA — Signal Chains, Archived', template: '%s · Suede DNA' },
+  title: { default: 'Suede DNA: Signal Chains, Archived', template: '%s · Suede DNA' },
   description: defaultDescription,
   keywords: [
     'guitar rigs',
@@ -41,13 +41,13 @@ export const metadata: Metadata = {
     locale: 'en_US',
     url: SITE_URL,
     siteName: 'Suede DNA',
-    title: 'Suede DNA — Signal Chains, Archived',
+    title: 'Suede DNA: Signal Chains, Archived',
     description: defaultDescription,
     images: [DNA_SOCIAL_IMAGE],
   },
   twitter: {
     card: 'summary_large_image',
-    title: 'Suede DNA — Signal Chains, Archived',
+    title: 'Suede DNA: Signal Chains, Archived',
     description: defaultDescription,
     site: '@AISUEDE',
     creator: '@johnnysuede',

src/app/opengraph-image.tsx

@@ -4,7 +4,7 @@ import { getStats } from '@/lib/manifest';
 export const runtime = 'nodejs';
 export const size = { width: 1200, height: 630 };
 export const contentType = 'image/png';
-export const alt = 'Suede DNA — Signal Chains, Archived';
+export const alt = 'Suede DNA: Signal Chains, Archived';
 
 export default async function Image() {
   const stats = getStats();

src/components/footer/Footer.tsx

@@ -58,6 +58,14 @@ export function Footer() {
           >
             PRIVACY ↗
           </a>
+          <a
+            href="https://hub.suedeai.ai"
+            className="text-[color:var(--color-mute-readable)] hover:text-[color:var(--color-signal)] block mt-1"
+            target="_blank"
+            rel="noopener noreferrer"
+          >
+            Suede estate directory ↗
+          </a>
           <a
             href="https://guitar.solutions"
             className="text-[color:var(--color-mute-readable)] hover:text-[color:var(--color-signal)] block mt-1"

src/lib/seo.ts

@@ -54,11 +54,11 @@ export function artistArchiveContext(
 }
 
 export function homePageTitle(): string {
-  return 'Suede DNA — Signal Chains, Archived';
+  return 'Suede DNA: Signal Chains, Archived';
 }
 
 export function homePageDescription(stats: { totalRigs: number; yearMin: number; yearMax: number }): string {
-  return `A compilation archive of guitarists' rigs and signal chains. ${stats.totalRigs.toLocaleString()} documented setups from ${stats.yearMin} to ${stats.yearMax}, indexed by year and player, sourced from the Guitar Geek Archives on the Internet Archive.`;
+  return `A compilation archive of guitarists' rigs and signal chains. ${stats.totalRigs.toLocaleString()} documented setups from ${stats.yearMin} to ${stats.yearMax}, indexed by year and player.`;
 }
 
 /**
@@ -119,7 +119,7 @@ export function homeJsonLd(
   return {
     '@context': 'https://schema.org',
     '@type': 'CollectionPage',
-    name: 'Suede DNA — Signal Chains, Archived',
+    name: 'Suede DNA: Signal Chains, Archived',
     description: homePageDescription(stats),
     url: siteUrl,
     isPartOf: { '@type': 'WebSite', name: 'Suede DNA', url: siteUrl },

src/lib/seo/social-metadata.ts

@@ -2,5 +2,5 @@ export const DNA_SOCIAL_IMAGE = {
   url: '/dna-social-card.webp',
   width: 1200,
   height: 630,
-  alt: 'Suede DNA — Signal Chains, Archived',
+  alt: 'Suede DNA: Signal Chains, Archived',
 };

tests/lib/seo.test.ts

@@ -6,7 +6,10 @@ import {
   artistPageDescription,
   artistPageTitle,
   homeJsonLd,
+  homePageDescription,
+  homePageTitle,
 } from '../../src/lib/seo';
+import { getStats } from '../../src/lib/manifest';
 import { ARTICLES } from '../../src/lib/articles-content';
 import type { Artist } from '../../src/lib/manifest';
 
@@ -106,6 +109,20 @@ describe('SEO helpers', () => {
     expect(iommi.name).toContain('Black Sabbath');
   });
 
+  it('keeps the home page title free of em dashes across every surface', () => {
+    expect(homePageTitle()).toBe('Suede DNA: Signal Chains, Archived');
+    expect(homePageTitle()).not.toContain('\u2014');
+    expect(homeJsonLd('https://dna.suedeai.ai', getStats()).name).toBe(homePageTitle());
+  });
+
+  it('keeps the home page description within the 160 character snippet limit', () => {
+    const description = homePageDescription(getStats());
+    expect(description.length).toBeLessThanOrEqual(160);
+    expect(description).toContain('409');
+    expect(description).toContain('1964 to 2014');
+    expect(description).toMatch(/indexed by year and player\.$/);
+  });
+
   it('does not declare a list structure the home page cannot enumerate', () => {
     const ld = homeJsonLd('https://dna.suedeai.ai', {
       totalRigs: 409,