style(desktop): padroniza header da tela de registro

Usa mesmo layout da sidebar: Raven + badge Plataforma de chamados

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/desktop/src/main.tsx

@@ -1651,10 +1651,10 @@ const resolvedAppUrl = useMemo(() => {
               setLogoSrc(`${appUrl}/logo-raven.png`)
             }}
           />
-          <div className="flex flex-col items-center gap-3">
-            <span className="text-xs font-medium uppercase tracking-wide text-neutral-500">Raven</span>
-            <span className="inline-flex items-center gap-2 rounded-full border border-slate-200 bg-slate-100/80 px-4 py-1.5 text-sm font-semibold text-neutral-700 shadow-sm">
-              Sistema de chamados
+          <div className="flex flex-col items-center gap-2">
+            <span className="text-lg font-semibold text-neutral-900">Raven</span>
+            <span className="inline-flex whitespace-nowrap rounded-full bg-neutral-900 px-2.5 py-1 text-[11px] font-medium text-white">
+              Plataforma de chamados
             </span>
             <StatusBadge status={status} />
           </div>