fix(pacientes): corregir acceso a d.found y d.user_id en verificarWhatsapp

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

lab_pacientes.php

@@ -531,9 +531,9 @@ async function verificarWhatsapp() {
     try {
         const r = await fetch(`api/lab/check_whatsapp.php?phone=${encodeURIComponent(tel)}`);
         const d = await r.json();
-        if (d.ok && d.data.found) {
+        if (d.ok && d.found) {
             badge.innerHTML = '<span class="text-success"><i class="fab fa-whatsapp me-1"></i>Registrado en WhatsApp</span>';
-            hiddenUid.value = d.data.user_id;
+            hiddenUid.value = d.user_id;
         } else {
             badge.innerHTML = '<span class="text-muted"><i class="fas fa-times-circle me-1"></i>Sin WhatsApp registrado</span>';
             hiddenUid.value = '';