Keep lab previews out of production, fix minds SEO guard

Two deploy-hygiene fixes:

- The landing-lab preview pages carry inline styles the CSP blocks and
  were never meant for production (they are gitignored, absent from a
  fresh checkout). Moved them to .lab-pages-archive/ so they no longer
  build into the deployed site. Restore into src/pages/lab/ to preview.

- The greatest-minds positioning guard matched the singular "great
  mind", which appears in a genuine quote (Woolf, "the great mind is
  androgynous"). Tightened it to the plural collective framing so real
  quotes pass while the forbidden positioning is still caught.

Author: michael-chipmates

.gitignore

@@ -91,7 +91,10 @@ client/public/assets/
 # The First Exchange hero and the figure orbit were chosen and promoted into
 # the real pages (now tracked). The rejected hero variants, the interactive
 # library experiments, and the lab preview pages stay out of version control.
-marketing/src/pages/lab/
+# The lab preview pages moved to .lab-pages-archive/ so they no longer build
+# into production (they carry inline styles the CSP blocks); restore into
+# src/pages/lab/ locally to preview a variant.
+marketing/.lab-pages-archive/
 marketing/src/components/landing-lab/HeroListening.astro
 marketing/src/components/landing-lab/hero-listening.css
 marketing/src/islands/VoiceDeck.tsx

client/scripts/validate-seo.mjs

@@ -65,8 +65,11 @@ for (const f of files) {
   const inlineStyles = (html.match(/<[^>]+\sstyle="/g) || []).length;
   if (inlineStyles) hard.push(`${rel}: ${inlineStyles} inline style="" attribute(s) (CSP would block)`);
 
-  // 3. No forbidden "greatest minds" framing (locked positioning).
-  if (/great(est)? minds?|gr(ö|oe)(ß|ss)te[nr]? (denker|geister)/i.test(dhtml))
+  // 3. No forbidden "greatest minds" framing (locked positioning). Plural only:
+  // the collective positioning claim is always plural ("greatest minds"). The
+  // singular "great mind" occurs in genuine quotes (Woolf, "the great mind is
+  // androgynous") and must not trip the guard.
+  if (/great(est)? minds|gr(ö|oe)(ß|ss)te[nr]? (denker|geister)/i.test(dhtml))
     hard.push(`${rel}: forbidden "greatest minds / größten Denker" framing`);
 
   // 4. Meta description: present, <=160, unique.