fix: Ads CPC con céntimos + clics enlace Meta; gráficas barras/línea con ejes

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

src/lib/meta-leads.ts

@@ -18,3 +18,16 @@ export function leadFromMetaActions(
   );
   return primary ? nMeta(primary.value) : 0;
 }
+
+/**
+ * Ads Manager CPC uses «clics en el enlace» (link_click), not all clicks.
+ * Fall back to all clicks when link_click is absent.
+ */
+export function linkClicksFromMetaActions(
+  actions: { action_type?: string; value?: string }[] | undefined,
+  allClicks: number
+): number {
+  if (!actions?.length) return allClicks;
+  const link = actions.find((a) => a.action_type === 'link_click');
+  return link ? nMeta(link.value) : allClicks;
+}