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

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

src/lib/ads-sync.ts

@@ -2,7 +2,7 @@
 
 import { serviceHeaders, supabaseUrl } from '@/lib/agency';
 import { resolveMetaAccessToken } from '@/lib/ads-discovery';
-import { leadFromMetaActions, nMeta } from '@/lib/meta-leads';
+import { leadFromMetaActions, linkClicksFromMetaActions, nMeta } from '@/lib/meta-leads';
 import { resolveGoogleAdsAccessToken } from '@/lib/google-ads-auth';
 
 const META_GRAPH = 'https://graph.facebook.com/v21.0';
@@ -155,7 +155,8 @@ async function fetchMetaInsightsWindow(
         ad_id: campaignId || '',
         ad_name: '',
         impressions: n(row.impressions),
-        clicks: n(row.clicks),
+        // Store link clicks so CPC = spend/clicks matches Ads Manager.
+        clicks: linkClicksFromMetaActions(row.actions, n(row.clicks)),
         spend: Math.round(n(row.spend) * 100) / 100,
         platform_leads: leadFromMetaActions(row.actions),
       });

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;
+}

src/lib/metrics.ts

@@ -315,6 +315,14 @@ export function formatEur(v: number): string {
   })} €`;
 }
 
+/** CPC / CPL — always show cents like Ads Manager. */
+export function formatEurCents(v: number): string {
+  return `${v.toLocaleString('es-ES', {
+    minimumFractionDigits: 2,
+    maximumFractionDigits: 2,
+  })} €`;
+}
+
 export function formatPct(v: number | null): string {
   if (v === null || Number.isNaN(v)) return '—';
   const sign = v > 0 ? '+' : '';