Fix voice session modal closure stale state and echo interruption loops by muting mic during speaking status

frontend/src/components/VoiceSessionModal.jsx

@@ -6,6 +6,16 @@ export default function VoiceSessionModal({ isOpen, onClose, apiKey }) {
   const [errorMessage, setErrorMessage] = useState('');
   const [isMuted, setIsMuted] = useState(false);
   
+  const statusRef = useRef(status);
+  useEffect(() => {
+    statusRef.current = status;
+  }, [status]);
+
+  const isMutedRef = useRef(isMuted);
+  useEffect(() => {
+    isMutedRef.current = isMuted;
+  }, [isMuted]);
+
   const wsRef = useRef(null);
   const audioContextRef = useRef(null);
   const playbackContextRef = useRef(null);
@@ -59,7 +69,8 @@ export default function VoiceSessionModal({ isOpen, onClose, apiKey }) {
         processorRef.current = processor;
 
         processor.onaudioprocess = (e) => {
-          if (isMuted) return;
+          if (isMutedRef.current) return;
+          if (statusRef.current === 'speaking' || statusRef.current === 'connecting') return;
 
           const inputData = e.inputBuffer.getChannelData(0);
           // Convert Float32 to Int16 PCM
@@ -149,7 +160,7 @@ export default function VoiceSessionModal({ isOpen, onClose, apiKey }) {
       if (audioContextRef.current) audioContextRef.current.close();
       if (playbackContextRef.current) playbackContextRef.current.close();
     };
-  }, [isOpen, isMuted]);
+  }, [isOpen]);
 
   if (!isOpen) return null;