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/components/SponsorLogoStrip.tsx

@@ -13,7 +13,7 @@ async function fetchSponsors(): Promise<Sponsor[]> {
     const { data: ads } = await adv
       .from("active_advertisers_by_property")
       .select("company_name_lower")
-      .eq("property", "broadcastbeat");
+      .eq("property", "avbeat");
     const names = Array.from(new Set((ads || []).map((r: any) => String(r.company_name_lower))));
 
     const bb = createAdminClient();
@@ -70,11 +70,11 @@ export default async function SponsorLogoStrip() {
   return (
     <section className="max-w-container mx-auto px-4 py-6 border-t border-b border-[#1a1a1a]" aria-label="Content partners">
       <div className="flex items-center gap-4 mb-3">
-        <span className="text-[10px] uppercase tracking-widest text-[#E67E22] font-bold">
+        <span className="text-[10px] uppercase tracking-widest text-[#3b82f6] font-bold">
           Content Partners
         </span>
         <div className="flex-1 h-px bg-[#1a1a1a]" />
-        <Link href="/advertise" className="text-[10px] text-[#666] hover:text-[#E67E22] font-mono">
+        <Link href="/advertise" className="text-[10px] text-[#666] hover:text-[#3b82f6] font-mono">
           Advertise →
         </Link>
       </div>