fix: creatividades — Google siempre con fallback; Meta preview 9:16 y textos reales

OAuth Ads caducado: aviso amable + campañas warehouse. Meta deja de volcar todas las variantes del asset_feed.

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

src/lib/ads-discovery.ts

@@ -133,36 +133,8 @@ async function metaToken(): Promise<string> {
 }
 
 async function googleAdsAccessToken(): Promise<string> {
-  const refresh =
-    process.env.GOOGLE_ADS_REFRESH_TOKEN?.trim() ||
-    process.env.GOOGLE_OAUTH_REFRESH_TOKEN?.trim();
-  const clientId =
-    process.env.GOOGLE_ADS_CLIENT_ID?.trim() ||
-    process.env.GOOGLE_OAUTH_CLIENT_ID?.trim();
-  const clientSecret =
-    process.env.GOOGLE_ADS_CLIENT_SECRET?.trim() ||
-    process.env.GOOGLE_OAUTH_CLIENT_SECRET?.trim();
-  if (!refresh || !clientId || !clientSecret) {
-    throw new Error(
-      'Faltan GOOGLE_ADS_REFRESH_TOKEN + CLIENT_ID/SECRET (o GOOGLE_OAUTH_*)'
-    );
-  }
-  const body = new URLSearchParams({
-    refresh_token: refresh,
-    client_id: clientId,
-    client_secret: clientSecret,
-    grant_type: 'refresh_token',
-  });
-  const r = await fetch('https://oauth2.googleapis.com/token', {
-    method: 'POST',
-    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
-    body,
-  });
-  if (!r.ok) {
-    throw new Error(`Google Ads token: ${(await r.text()).slice(0, 200)}`);
-  }
-  const j = (await r.json()) as { access_token: string };
-  return j.access_token;
+  const { resolveGoogleAdsAccessToken } = await import('@/lib/google-ads-auth');
+  return resolveGoogleAdsAccessToken();
 }
 
 export async function listMetaAdAccounts(): Promise<NamedAccount[]> {