wip-banner-system: real ads, logo fix, remove duplicate banner, clean footer

- Remove duplicate 728x90 LeaderboardAd below news ticker (per Ryan)
- Footer: remove NAB Official Media Partner badge
- Header: replace AdSlot stub with real AdImage rotation (3 verified 728x90s)
- Header: fix logo path from dead WP URL to local /assets/images/logo.png
- ads.ts: only include ads with verified real images (3x728x90, 2x300x250)
- ads.ts: remove 22 unrecovered ads — see PENDING_ads.md for upload list
- SidebarAdStack: handle null FIXED_300X600 gracefully (Blackmagic not recovered)
- public/legacy/ads/: 5 real ad images committed (Tower, Sony, LiveU 728x90; LiveU PAYG, Telycam 300x250)
- public/assets/images/logo.png: recovered from Wayback Machine

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/Header.tsx

@@ -15,7 +15,8 @@ import {
 import { createClient } from "@/lib/supabase/client";
 import NotificationCenter from "@/components/NotificationCenter";
 import LanguageSwitcher from "@/components/LanguageSwitcher";
-import AdSlot from "@/components/AdSlot";
+import AdImage from "@/components/AdImage";
+import { ADS_728X90, shuffle } from "@/lib/ads";
 
 interface NavItem {
   label: string;
@@ -356,11 +357,13 @@ export default function Header() {
       </div>
 
       {/* HEADER LEADERBOARD — site-wide 728x90 between utility bar and main nav */}
-      <div className="bg-[#0a0a0a] border-b border-[#1a1a1a] py-3 hidden md:block">
-        <div className="max-w-container mx-auto px-4 flex justify-center">
-          <AdSlot zone="homepage-top" size="728x90" />
+      {ADS_728X90.length > 0 && (
+        <div className="bg-[#0a0a0a] border-b border-[#1a1a1a] py-3 hidden md:block">
+          <div className="max-w-container mx-auto px-4 flex justify-center">
+            <AdImage ad={shuffle(ADS_728X90)[0]} priority page="header" />
+          </div>
         </div>
-      </div>
+      )}
 
       {/* MAIN NAV */}
       <div className={`sticky top-0 z-50 transition-shadow duration-200 ${scrolled ? "shadow-nav" : ""}`}>
@@ -370,7 +373,7 @@ export default function Header() {
               {/* Logo */}
               <Link href="/home-page" className="flex-shrink-0 focus:outline-none focus-visible:ring-2 focus-visible:ring-[#3b82f6] focus-visible:ring-offset-1 focus-visible:ring-offset-[#111]">
                 <AppImage
-                  src="https://www.broadcastbeat.com/wp-content/uploads/80077_broadcastbeat_FLAT_A_02-e1658883849688-1024x132.png"
+                  src="/assets/images/logo.png"
                   alt="BroadcastBeat logo"
                   width={200}
                   height={26}