fix: closing script tag duplo-escapado em admin-cliente (<\\/script> → <\/script>)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/admin-cliente.js

@@ -1176,7 +1176,7 @@ window.addEventListener('themechange', function() { if (clientData) renderAll(cl
 
 // Init
 document.addEventListener('DOMContentLoaded', function() { applyChartDefaults(getChartTheme()); loadClients(); });
-<\\/script>
+<\/script>
 </body>
 </html>`;
 }