feat: metrics dashboard with WoW/MoM/YoY and creatives pipeline

Rebuild KPIs as a real dashboard (period deltas, tenant zoom), clarify
objetivos/calendario/activos sources, and turn creatives into a status
pipeline with delete.

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

src/app/dashboard/layout.tsx

@@ -53,7 +53,7 @@ export default async function DashboardLayout({
               className="flex items-center gap-3 px-3 py-2.5 rounded-lg text-sm font-medium text-gray-200 hover:text-white hover:bg-gray-800/60 transition-all"
             >
               <BarChart3 className="w-4 h-4 text-brand-500" />
-              Métricas & CAC / ROAS
+              Métricas
             </Link>
             <Link
               href="/dashboard/estrategia"
@@ -81,7 +81,7 @@ export default async function DashboardLayout({
               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"
             >
               <FolderGit2 className="w-4 h-4 text-orange-400" />
-              Creatividades
+              Pipeline creatividades
             </Link>
             <Link
               href="/dashboard/asistente"