feat(catalogo): link de afiliado por idioma e botão alinhado no rodapé do card

O botão do AliExpress passa a ficar no rodapé do card, alinhado entre os cards.
O link usa a coluna Link_<idioma> da planilha (en, es, fr, de, zh-CN) e cai no
Link (Brasil) quando ela está vazia. Colunas de link não viram filtro, e a API
lê A1:AZ1000.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/[locale]/catalogo/page.jsx

@@ -6,6 +6,7 @@ import Header from "@/components/Header";
 import Footer from "@/components/Footer";
 import PageHero from "@/components/PageHero";
 import BoardCard from "@/components/BoardCard";
+import { isLinkColumn } from "@/lib/boardLinks";
 import { AlertTriangle, RefreshCw, Search, ShoppingCart, SlidersHorizontal } from "lucide-react";
 
 const HEADER_MAP_EN = {
@@ -184,7 +185,7 @@ export default function PlacasPage() {
 
 	const generateFilterOptions = (data, headers) => {
 		const options = {};
-		const filterableColumns = headers.filter((h) => !excludedColumns.includes(h));
+		const filterableColumns = headers.filter((h) => !excludedColumns.includes(h) && !isLinkColumn(h));
 
 		filterableColumns.forEach((column) => {
 			const uniqueValues = new Set();
@@ -265,7 +266,7 @@ export default function PlacasPage() {
 
 	const activeFilterCount = Object.keys(activeFilters).length + (searchTerm ? 1 : 0);
 
-	const filterableColumns = headers.filter((h) => !excludedColumns.includes(h));
+	const filterableColumns = headers.filter((h) => !excludedColumns.includes(h) && !isLinkColumn(h));
 
 	const hero = (
 		<PageHero