chore: purge all rocket.new references from source

- Replace img.rocket.new mock URLs in authors/[slug] + FeaturedBento
  with /assets/images/article-placeholder.svg (live DB data drives
  these pages now; the static maps are fallback only).
- Replace broadcastb5322.builtwithrocket.new with broadcastbeat.com
  in admin API routes, news detail, forum layout, and the 4 Supabase
  edge functions that build outbound email links.
- Swap rocket-hosted JSON-LD logo URL in root layout for the local
  /assets/images/logo.png we already ship.
- Drop img.rocket.new from the Next.js image-hosts allowlist;
  add supabase.onsethost.com so storage proxy URLs can render.

The DB has had zero rocket.new image refs for weeks; this finishes
the job in the codebase so no page on broadcastbeat.com can render
a rocket-hosted asset anymore.

src/app/forum/layout.tsx

@@ -23,17 +23,17 @@ export default function ForumLayout({ children }: { children: React.ReactNode })
     '@type': 'WebPage',
     name: 'Broadcast Beat — The Crew Lounge',
     description: 'The Crew Lounge: an industry community for broadcast, motion picture and post production professionals worldwide.',
-    url: 'https://broadcastb5322.builtwithrocket.new/forum',
+    url: 'https://broadcastbeat.com/forum',
     isPartOf: {
       '@type': 'WebSite',
       name: 'Broadcast Beat',
-      url: 'https://broadcastb5322.builtwithrocket.new',
+      url: 'https://broadcastbeat.com',
     },
     breadcrumb: {
       '@type': 'BreadcrumbList',
       itemListElement: [
-        { '@type': 'ListItem', position: 1, name: 'Home', item: 'https://broadcastb5322.builtwithrocket.new' },
-        { '@type': 'ListItem', position: 2, name: 'The Crew Lounge', item: 'https://broadcastb5322.builtwithrocket.new/forum' },
+        { '@type': 'ListItem', position: 1, name: 'Home', item: 'https://broadcastbeat.com' },
+        { '@type': 'ListItem', position: 2, name: 'The Crew Lounge', item: 'https://broadcastbeat.com/forum' },
       ],
     },
   };