some tweaks

public/index.html

@@ -131,6 +131,12 @@
 <div id="modal-backdrop" class="hidden">
   <div id="settings-modal" role="dialog" aria-modal="true">
     <h2>Voice &amp; ICE settings</h2>
+    <h3>Audio input</h3>
+    <label class="field-label" for="audio-input">Microphone</label>
+    <select id="audio-input" class="settings-select">
+      <option value="">System default</option>
+    </select>
+    <p class="hint">Changes apply immediately when connected, or the next time you join.</p>
     <p class="hint">Overrides the server-provided ICE configuration (stored in <code>localStorage</code>, applied on next join).</p>
     <label class="toggle-row">
       <input type="checkbox" id="override-enabled" />