fix(home): equal-height service tiles + dedupe services

Service section on home page had two issues:
1. Tiles were different heights (longer content = taller tile)
   because .bento-tile had no min-height
2. Two service tiles showed the same title (AI Consult + Automation
   Consult) because src/content/services/ has 4 old + 4 -new mdx
   files; .slice(0, 4) grabbed the first 4 alphabetically which
   contained duplicate base slugs

Fixes:
- Add min-height: 380px + flex column to BentoTile so all tiles
  in a row are visually equal regardless of content length
- Add dedupedServices helper in index.astro that groups services
  by base slug and prefers the -new version when both exist
- Use dedupedServices.slice(0, 4) instead of services.slice(0, 4)

Result: 4 unique services (ai-consult-new, automation-new,
marketing-new, webdev-new) at equal height, filling the row.

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

src/pages/index.astro

@@ -49,6 +49,25 @@ const problemCards = [
 const problemSurfaces = ['yellow', 'purple-soft', 'mint', 'soft'] as const;
 
 const services = await getCollection('services');
+
+// De-duplicate services: keep only the `-new` version when both old and new exist
+// for the same base slug. Falls back to the old one if no `-new` exists.
+// Group by base slug (strip trailing `-new` if present).
+const dedupedServices = (() => {
+  const byBase = new Map<string, typeof services[number]>();
+  for (const s of services) {
+    const base = s.id.endsWith('-new') ? s.id.slice(0, -4) : s.id;
+    const existing = byBase.get(base);
+    if (!existing) {
+      byBase.set(base, s);
+    } else if (s.id.endsWith('-new') && !existing.id.endsWith('-new')) {
+      // Prefer the -new version
+      byBase.set(base, s);
+    }
+  }
+  return Array.from(byBase.values());
+})();
+
 const portfolio = await getCollection('portfolio');
 const featuredPortfolio = portfolio.filter(p => p.data.featured).slice(0, 4);
 ---
@@ -124,9 +143,9 @@ const featuredPortfolio = portfolio.filter(p => p.data.featured).slice(0, 4);
       </div>
 
       <BentoGrid>
-        {services.slice(0, 4).map((s, i) => {
-          // Asymmetric layout: 8 + 4, 4 + 8 — alternating
-          const span = i % 2 === 0 ? 8 : 4;
+        {dedupedServices.slice(0, 4).map((s, i) => {
+          // Equal 4x3 tiles (full width, 1 row)
+          const span = 3;
           const surface = (['yellow', 'purple-soft', 'mint', 'soft'] as const)[i];
           return (
             <a href={`/services/${s.id}`} style="display: block; text-decoration: none; color: inherit;">