feat: agency control panel for per-client connections

Matrix view of Meta/Google/Drive/Clientify, follow/archive clients,
and per-channel ON/OFF with account IDs in the client hub.

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

src/app/dashboard/agencia/page.tsx

@@ -77,7 +77,8 @@ export default async function AgencyPage() {
         </div>
         <h2 className="text-2xl font-bold tracking-tight text-white">Centro de Mando 4Ventures</h2>
         <p className="text-sm text-gray-400 mt-1">
-          Portafolio multi-cliente · integraciones (Meta, MCC, GA4, GSC, GTM, CRM, email) · alertas · modo superadmin.
+          Portafolio multi-cliente · control de conexiones (Meta, Google, Drive,
+          Clientify…) · seguir/archivar clientes · modo superadmin.
         </p>
       </div>