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/api/admin/banned-terms-scan/route.ts

@@ -30,7 +30,7 @@ export async function POST(request: NextRequest) {
       const titleLower = (post.title || '').toLowerCase();
       for (const bt of bannedTerms) {
         const termLower = bt.term.toLowerCase();
-        const siteMatch = bt.site_scope === 'both' || (bt.site_scope === 'broadcastbeat' && post.site_id === 1) || (bt.site_scope === 'avbeat' && post.site_id === 2);
+        const siteMatch = bt.site_scope === 'both' || (bt.site_scope === 'avbeat' && post.site_id === 1) || (bt.site_scope === 'avbeat' && post.site_id === 2);
         if (siteMatch && titleLower.includes(termLower)) {
           matches.push({ title: post.title, author: post.author_name, published_at: post.published_at, site_id: post.site_id, matched_term: bt.term, ban_level: bt.ban_level });
           break; // one match per post