av: clone broadcastbeat sources + AV Beat rebrand (Phase 1)

- Replaces the prior Rocket scaffold (saved on pre-bb-clone-rollback branch)
- Domain: broadcastbeat.com -> avbeat.com
- Brand: Broadcast Beat -> AV Beat
- Slug: broadcastbeat -> avbeat (package, identifiers)
- Schema fallback: bb -> av (env var name unchanged)
- Placeholder AV BEAT logo (gold->red gradient) at /assets/logos/av.svg
- All BB/RMP logo references repointed

Outstanding before public DNS swap:
  - Supabase av schema bootstrap (mirror of bb tables)
  - WordPress archive import (avbeat-com -> av.articles)
  - Coolify env vars
  - dev-avbeat.onsethost.com staging deploy + visual review

src/app/layout.tsx

@@ -34,8 +34,8 @@ export const viewport: Viewport = {
 
 export const metadata: Metadata = {
   metadataBase: new URL(process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3000'),
-  title: 'AV Beat — Where AV Meets IT',
-  description: 'AV Beat covers the convergence of pro AV and IT — broadcast, live production, streaming, and post-production technology. Breaking news, deep-dive features, and industry spotlights from NAB to InfoComm and beyond.',
+  title: 'AV Beat — Broadcast Engineering News & Insights',
+  description: 'The digital platform for broadcast engineering professionals. Breaking news, deep-dive features, and industry spotlights from NAB to IBC and beyond.',
   icons: {
     icon: [
       { url: '/favicon.ico', type: 'image/x-icon', sizes: 'any' },
@@ -59,24 +59,24 @@ export const metadata: Metadata = {
     locale: 'en_US',
     url: '/',
     siteName: 'AV Beat',
-    title: 'AV Beat — Where AV Meets IT',
-    description: 'Breaking news and insights at the intersection of pro AV and IT.',
+    title: 'AV Beat — Broadcast News',
+    description: 'Breaking news and insights for broadcast engineering professionals.',
     images: [
     {
       url: '/assets/images/og-image.png',
       width: 1200,
       height: 630,
-      alt: 'AV Beat — Where AV Meets IT',
+      alt: 'AV Beat — Broadcast Engineering News & Insights',
       type: 'image/png'
     }]
 
   },
   twitter: {
     card: 'summary_large_image',
-    site: '@AVBeat',
-    creator: '@AVBeat',
-    title: 'AV Beat — Where AV Meets IT',
-    description: 'Breaking news and insights at the intersection of pro AV and IT.',
+    site: '@AV Beat',
+    creator: '@AV Beat',
+    title: 'AV Beat — Broadcast News',
+    description: 'Breaking news and insights for broadcast engineering professionals.',
     images: ['/assets/images/og-image.png']
   },
   robots: {
@@ -125,7 +125,7 @@ export default function RootLayout({
               name: 'AV Beat',
               url: 'https://avbeat.com',
               logo: "https://avbeat.com/assets/images/logo.png",
-              description: 'AV Beat covers the convergence of pro AV and IT — broadcast, live production, streaming, and post-production technology.',
+              description: 'The digital platform for broadcast engineering professionals. Breaking news, deep-dive features, and industry spotlights from NAB to IBC and beyond.',
               sameAs: [
               'https://linkedin.com',
               'https://twitter.com',
@@ -144,7 +144,7 @@ export default function RootLayout({
         {/* Skip to main content — WCAG 2.4.1 */}
         <a
           href="#main-content"
-          className="sr-only focus:not-sr-only focus:fixed focus:top-2 focus:left-2 focus:z-[10000] focus:px-4 focus:py-2 focus:bg-[#E67E22] focus:text-white focus:rounded focus:font-bold focus:text-sm focus:outline-none"
+          className="sr-only focus:not-sr-only focus:fixed focus:top-2 focus:left-2 focus:z-[10000] focus:px-4 focus:py-2 focus:bg-[#3b82f6] focus:text-white focus:rounded focus:font-bold focus:text-sm focus:outline-none"
         >
           Skip to main content
         </a>