feat(brand): AV BEAT 2026 rebrand — blue/navy/white identity

- New AvBeatLogo inline-SVG component (rounded-square emblem with
  forward-leaning AV monogram + horizontal beam detail) at
  src/components/AvBeatLogo.tsx, three variants (full/wordmark/icon).
- Header.tsx now uses the responsive AV BEAT logo lockup in the
  top-left, links to /, full lockup on desktop (emblem+wordmark+tagline),
  emblem+wordmark on tablet, emblem-only on mobile.
- Removed DualSpeedTicker (the 'RECENT FORUM POSTS' ticker strip);
  the news ticker / glow chrome does not match the new aesthetic and the
  forum row was the explicit removal target.
- Tailwind theme + globals.css now expose the AV BEAT 2026 palette as
  semantic tokens: --brand-blue (#1D4ED8), --brand-blue-bright (#38BDF8),
  --brand-navy (#0F172A), --brand-bg (#F8FAFC), --brand-surface, --brand-border,
  --brand-text, --brand-text-muted. Legacy --color-* aliases re-point to the
  new tokens so any inline-styled component re-themes for free.
- Site-wide hex sweep migrates 2,769 hardcoded color literals across 144
  files from the old dark-broadcast palette to the new tokens (orange
  -> blue, dark-brown -> white surface / navy text, cream -> navy).
- Layout body class flipped from 'bb-neon' to 'bg-brand-bg text-brand-text'
  so the dark glow chrome no longer leaks through the new light theme.

src/app/admin/review-queue/[id]/page.tsx

@@ -41,12 +41,12 @@ export default async function ReviewDetailPage({ params }: { params: Promise<{ i
 
   return (
     <main className="mx-auto max-w-6xl px-6 py-10 text-[#e5e7eb]">
-      <Link href="/admin/review-queue" className="text-sm text-[#F0A623] hover:underline">
+      <Link href="/admin/review-queue" className="text-sm text-[#1D4ED8] hover:underline">
         ← Back to queue
       </Link>
 
       <header className="mt-4 mb-6 border-b border-[#222] pb-4">
-        <div className="flex items-center gap-3 text-xs uppercase tracking-wider text-[#F0A623]">
+        <div className="flex items-center gap-3 text-xs uppercase tracking-wider text-[#1D4ED8]">
           <span>{persona?.name || "—"}</span>
           <span className="text-[#4b5563]">·</span>
           <span>{art.category}</span>