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/app/home-page/page.tsx

@@ -3,7 +3,6 @@ import type { Metadata } from "next";
 import Header from "@/components/Header";
 import Footer from "@/components/Footer";
 import NewsTicker from "./components/NewsTicker";
-import LeaderboardAd from "./components/LeaderboardAd";
 import FeaturedBento from "./components/FeaturedBento";
 import SpotlightCarousel from "./components/SpotlightCarousel";
 import ArticleFeed from "./components/ArticleFeed";
@@ -153,13 +152,6 @@ export default function HomePage() {
         </Suspense>
       </div>
 
-      {/* Leaderboard ad */}
-      <div className="section-enter section-enter-2">
-        <Suspense fallback={<LeaderboardSkeleton />}>
-          <LeaderboardAd />
-        </Suspense>
-      </div>
-
       {/* Featured articles bento */}
       <ScrollRevealSection className="section-enter section-enter-3">
         <Suspense fallback={<BentoSkeleton />}>