Docs: document Users/Machines unification, company filter in Machines, Windows OS label, and identity/email/history guidance in OPERATIONS.md

src/components/admin/machines/admin-machines-overview.tsx

@@ -3200,6 +3200,14 @@ function MachineCard({ machine, companyName }: { machine: MachinesQueryItem; com
             <Monitor className="size-4 text-slate-500" /> {machine.hostname}
           </CardTitle>
           <CardDescription className="line-clamp-1 text-xs">{machine.authEmail ?? "—"}</CardDescription>
+          {collaborator?.email ? (
+            <div className="mt-2 flex flex-wrap items-center gap-2 text-[11px] text-slate-600">
+              <span className="rounded-full border border-slate-300 bg-slate-100 px-2 py-0.5">
+                Usuário vinculado: {collaborator.name ? `${collaborator.name} · ` : ""}{collaborator.email}
+              </span>
+              <Link href="/admin" className="underline underline-offset-4">gerenciar usuários</Link>
+            </div>
+          ) : null}
           {!isActive ? (
             <Badge variant="outline" className="mt-2 w-fit border-rose-200 bg-rose-50 text-[10px] font-semibold uppercase tracking-wide text-rose-700">
               Desativada