fix: previews Meta vía proxy y creatividades Google PMax/RSA

Las imágenes Meta dejan de romperse en el navegador; Google trae assets en vivo.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/lib/ad-creatives-meta.ts

@@ -36,6 +36,7 @@ export type AdCreativeCard = {
   headline: string;
   primaryText: string;
   status?: string;
+  youtubeId?: string;
 };
 
 type DailyAgg = {
@@ -193,8 +194,9 @@ async function fetchMetaCreativeBundle(
     }, token);
 
     let creative = (raw.creative || {}) as Record<string, unknown>;
+    // Only hydrate creative detail when thumbnail/image missing
     const cid = str(creative.id);
-    if (cid) {
+    if (cid && !str(creative.thumbnail_url) && !str(creative.image_url)) {
       try {
         const detail = await graphGet<Record<string, unknown>>(
           cid,
@@ -248,16 +250,16 @@ export async function fetchMetaCreativeCards(opts: {
     'meta',
     opts.since,
     opts.until
-  ).slice(0, opts.limit ?? 40);
+  ).slice(0, opts.limit ?? 16);
 
   if (!aggs.length) {
     return { ads: [], warning: 'Sin ads Meta en ad_daily para este periodo' };
   }
 
   const out: AdCreativeCard[] = [];
-  // Sequential batches of 5 to respect rate limits
-  for (let i = 0; i < aggs.length; i += 5) {
-    const chunk = aggs.slice(i, i + 5);
+  // Parallel batches of 8 — single Graph call per ad (thumbnail already in creative{})
+  for (let i = 0; i < aggs.length; i += 8) {
+    const chunk = aggs.slice(i, i + 8);
     const bundles = await Promise.all(
       chunk.map((a) => fetchMetaCreativeBundle(a.adId, token))
     );