fix(pipeline): dedupe+P2002; add red maple-leaf cover system; replace dead CBC feeds (Google News CN / NatPost Canada); worker dead-letter

src/components/ArticleCard.tsx

@@ -1,29 +1,24 @@
 import Link from 'next/link';
 import type { ArticleCard as Card } from '@/lib/queries';
+import { resolveCoverImage } from '@/lib/cover';
 import { formatRelativeTime } from '@/lib/format';
 
 export default function ArticleCard({ card }: { card: Card }) {
   const href = `/article/${card.slug}`;
   const title = card.headline ?? card.title;
+  const image = resolveCoverImage(card.image, card.category);
   return (
     <article className="group flex flex-col overflow-hidden rounded-xl border border-ink-200 bg-white shadow-sm transition hover:-translate-y-0.5 hover:shadow-md">
       <Link
         href={href}
         className="relative block aspect-[16/9] overflow-hidden bg-ink-100"
       >
-        {card.image ? (
-          // eslint-disable-next-line @next/next/no-img-element
-          <img
-            src={card.image}
-            alt=""
-            loading="lazy"
-            className="h-full w-full object-cover transition duration-300 group-hover:scale-[1.03]"
-          />
-        ) : (
-          <span className="flex h-full items-center justify-center font-display text-4xl text-ink-300">
-            ◆
-          </span>
-        )}
+        <img
+          src={image}
+          alt=""
+          loading="lazy"
+          className="h-full w-full object-cover transition duration-300 group-hover:scale-[1.03]"
+        />
       </Link>
       <div className="flex flex-1 flex-col p-4">
         <h3 className="font-display text-lg font-bold leading-snug text-ink-900 group-hover:text-maple-700">