fix: extract domestic paper titles cleanly without quotes and remove All Overview tab from Publications

refer_landing_page/app/publications/_components/CategoryNav.tsx

@@ -8,21 +8,10 @@ interface CategoryNavProps {
   totalCount?: number;
 }
 
-export function CategoryNav({ currentCategory, totalCount }: CategoryNavProps) {
+export function CategoryNav({ currentCategory }: CategoryNavProps) {
   return (
     <div className="space-y-4">
       <div className="flex flex-wrap items-center gap-2 border-b border-line pb-4">
-        <Link
-          href="/publications"
-          className={`px-4 py-2 rounded text-xs font-mono tracking-wider transition-colors ${
-            !currentCategory
-              ? "bg-ink text-ivory font-bold"
-              : "bg-paper text-ink border border-line hover:border-ink"
-          }`}
-        >
-          All Overview {!currentCategory && totalCount ? `(${totalCount})` : ""}
-        </Link>
-
         {PUB_CATEGORIES.map((cat) => {
           const isActive = currentCategory === cat.slug;
           return (