fix: use Float32Array intermediate for AudioData.copyTo

- AudioData.copyTo requires destination Float32Array, not AudioBuffer channel
- Create temp Float32Array per channel, copyTo into it, then set into AudioBuffer
- Properly handle 48kHz stereo Opus output to AudioContext

public/dashboard.js

@@ -485,7 +485,11 @@ const state = {
     }
 
     function playAudioData(audioData) {
-      if (!state.audioContextListen) return;
+      if (!state.audioContextListen) {
+        audioData.close();
+        return;
+      }
+      try {
         const sampleRate = audioData.sampleRate;
         const frameCount = audioData.numberOfFrames;
         const numberOfChannels = audioData.numberOfChannels;
@@ -495,7 +499,10 @@ const state = {
           sampleRate
         );
         for (let ch = 0; ch < numberOfChannels; ch++) {
-        audioData.copyTo(audioBuffer.getChannelData(ch), { planeIndex: ch });
+          const channelData = audioBuffer.getChannelData(ch);
+          const tempArray = new Float32Array(frameCount);
+          audioData.copyTo(tempArray, { planeIndex: ch });
+          channelData.set(tempArray);
         }
         const source = state.audioContextListen.createBufferSource();
         source.buffer = audioBuffer;
@@ -503,8 +510,12 @@ const state = {
         const startAt = Math.max(state.nextStartTime, state.audioContextListen.currentTime);
         source.start(startAt);
         state.nextStartTime = startAt + audioBuffer.duration;
+      } catch (error) {
+        console.error('Play audio error:', error);
+      } finally {
         audioData.close();
       }
+    }
 
     function playPcm(arrayBuffer) {
       if (!state.audioContextListen) return;