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/news/[slug]/NewsArticleDetailClient.tsx

@@ -226,7 +226,7 @@ export default function NewsArticleDetailClient({
     setEmailSending(true);
     setEmailStatus("idle");
     try {
-      const articleUrl = `${process.env.NEXT_PUBLIC_SITE_URL || "https://broadcastb5322.builtwithrocket.new"}/news/${article.slug}`;
+      const articleUrl = `${process.env.NEXT_PUBLIC_SITE_URL || "https://broadcastbeat.com"}/news/${article.slug}`;
       const res = await fetch("/api/news/share-email", {
         method: "POST",
         headers: { "Content-Type": "application/json" },
@@ -262,7 +262,7 @@ export default function NewsArticleDetailClient({
   const articleUrl =
     typeof window !== "undefined"
       ? window.location.href
-      : `https://broadcastb5322.builtwithrocket.new/news/${article.slug}`;
+      : `https://broadcastbeat.com/news/${article.slug}`;
 
   return (
     <div className="min-h-screen bg-background">