feat: KPIs con totales absolutos, backfill ads y ventas en cruce canal

Comparativas WoW/MoM/YoY muestran prev/Δ además del %; sync ads admite
histórico desde 2025; tabla ads↔CRM añade cierres, ventas y ROAS.

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

src/app/api/cron/superhuman-sync/route.ts

@@ -0,0 +1,46 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { assertCronAuth } from '@/lib/cron-auth';
+import {
+  syncAllSuperhumanTenants,
+  superhumanConfigured,
+} from '@/lib/superhuman-docs';
+
+export const dynamic = 'force-dynamic';
+export const maxDuration = 300;
+
+/**
+ * Daily Superhuman / Seguimiento sync for all tenants.
+ * Auth: Authorization: Bearer $CRON_SECRET
+ */
+export async function GET(req: NextRequest) {
+  const denied = assertCronAuth(req);
+  if (denied) return denied;
+
+  if (!superhumanConfigured()) {
+    return NextResponse.json({
+      ok: false,
+      warning: 'SUPERHUMAN_DOCS_API_KEY no configurado',
+    });
+  }
+
+  try {
+    const result = await syncAllSuperhumanTenants({
+      maxEntries: 100,
+      exportBodies: true,
+    });
+    return NextResponse.json({
+      ok: true,
+      ...result,
+      at: new Date().toISOString(),
+    });
+  } catch (e) {
+    return NextResponse.json(
+      { ok: false, error: e instanceof Error ? e.message : 'sync failed' },
+      { status: 500 }
+    );
+  }
+}
+
+export async function POST(req: NextRequest) {
+  return GET(req);
+}