feat: interactive seguimiento timeline and channel evolution

Sync Superhuman Docs seguimiento/KPI pages into the portal (never passwords)
and show clients a dynamic timeline plus per-channel kpi_weekly charts.

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

src/app/dashboard/layout.tsx

@@ -9,7 +9,8 @@ import {
   Layers,
   LogOut,
   UserCheck,
-  CalendarDays
+  CalendarDays,
+  Radio
 } from 'lucide-react';
 import { createClient } from '@/lib/supabase/server';
 import { logoutAction } from '@/app/auth/actions';
@@ -55,6 +56,13 @@ export default async function DashboardLayout({
               <BarChart3 className="w-4 h-4 text-brand-500" />
               Métricas
             </Link>
+            <Link
+              href="/dashboard/seguimiento"
+              className="flex items-center gap-3 px-3 py-2.5 rounded-lg text-sm font-medium text-gray-300 hover:text-white hover:bg-gray-800/60 transition-all"
+            >
+              <Radio className="w-4 h-4 text-sky-400" />
+              Seguimiento
+            </Link>
             <Link
               href="/dashboard/estrategia"
               className="flex items-center gap-3 px-3 py-2.5 rounded-lg text-sm font-medium text-gray-300 hover:text-white hover:bg-gray-800/60 transition-all"

src/app/dashboard/seguimiento/page.tsx

@@ -0,0 +1,16 @@
+import React from 'react';
+import { createClient } from '@/lib/supabase/server';
+import { redirect } from 'next/navigation';
+import SeguimientoBoard from '@/components/SeguimientoBoard';
+
+export const dynamic = 'force-dynamic';
+
+export default async function SeguimientoPage() {
+  const supabase = await createClient();
+  const {
+    data: { user },
+  } = await supabase.auth.getUser();
+  if (!user) redirect('/login');
+
+  return <SeguimientoBoard />;
+}