Smooth realtime display frame pacing

www/main.js

@@ -2698,14 +2698,20 @@ async function loop(now){
   const currentAudioSeq = Math.max(currentMetricsSeq, currentVisualsSeq, currentXySeq);
   const audioDirty = currentAudioSeq > lastRenderedAudioSeq;
   const shouldRenderFrame =
+    audioOk ||
     renderDirty ||
     audioDirty ||
     !audioOk ||
     style === 'options-panel' ||
     style === 'recorder' ||
     renderStyle === 'clock';
-  if (elapsed >= target){
-    lastFrameTime = now - (elapsed % targetMs);
+  // With live audio, requestAnimationFrame itself is the display clock. An
+  // additional exact 60 Hz comparison occasionally rejected a real 60 Hz
+  // frame because of fractional timestamp jitter, creating 33 ms pauses in
+  // otherwise smooth peak decay. Only throttle the disconnected state.
+  const frameDue = audioOk || elapsed >= target;
+  if (frameDue){
+    lastFrameTime = audioOk ? now : now - (elapsed % targetMs);
     try{
       updateRect();
       meterHitRects.length = 0;