feat: Enter auto-selects first exam match in TomSelect

onType highlights the first visible option on each keystroke so pressing
Enter immediately selects it — no need to arrow-down manually.
Also adds selectOnTab for the same effect with Tab key.

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

modules/turnero/views/recepcion.php

@@ -1031,8 +1031,16 @@ document.addEventListener('DOMContentLoaded', () => {
     examTS = new TomSelect('#sel-examenes', {
         plugins: ['remove_button'],
         maxOptions: null,
+        selectOnTab: true,
         onItemAdd:    () => recalcularPrecios(),
         onItemRemove: () => recalcularPrecios(),
+        onType(str) {
+            if (!str) return;
+            requestAnimationFrame(() => {
+                const first = examTS.dropdown_content.querySelector('.option:not(.disabled)');
+                if (first) examTS.setActiveOption(first);
+            });
+        },
         render: {
             option(data, escape) {
                 const consent = data['data-consent'] == '1' || data.consent == '1';