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/admin/adops/page.tsx

@@ -75,7 +75,7 @@ export default function AdOpsDashboardPage() {
         <div className="flex gap-2 flex-wrap">
           <select value={filterSite} onChange={e => setFilterSite(e.target.value)} className="px-2 py-1 bg-[#111] border border-[#252525] rounded text-xs text-[#888] focus:outline-none">
             <option value="">All Sites</option>
-            {['broadcastbeat','avbeat','backlotbeat','broadcastengineering'].map(s => <option key={s} value={s}>{s}</option>)}
+            {['avbeat','avbeat','backlotbeat','broadcastengineering'].map(s => <option key={s} value={s}>{s}</option>)}
           </select>
           <select value={filterStatus} onChange={e => setFilterStatus(e.target.value)} className="px-2 py-1 bg-[#111] border border-[#252525] rounded text-xs text-[#888] focus:outline-none">
             <option value="">All Statuses</option>