fix sound

src/App.jsx

@@ -35,8 +35,32 @@ export default function App() {
     return onAdminChange((v) => setIsAdmin(v));
   }, []);
 
+  // Background wind sound loop
+  const windRef = useRef(null);
+  useEffect(() => {
+    const wind = new Audio(`${import.meta.env.BASE_URL}sound/wind.mp3`);
+    wind.loop = true;
+    wind.volume = volumeRef.current;
+    wind.play().catch(() => {});
+    windRef.current = wind;
+    return () => { wind.pause(); wind.src = ''; };
+  }, []);
+
   const handleLangChange = useCallback((v) => { setLang(v); langRef.current = v; }, []);
-  const handleVolumeChange = useCallback((v) => { setVolume(v); volumeRef.current = v; }, []);
+  const handleVolumeChange = useCallback((v) => {
+    setVolume(v);
+    volumeRef.current = v;
+    if (windRef.current) windRef.current.volume = v;
+  }, []);
+
+  useEffect(() => {
+    if (!windRef.current) return;
+    if (view === 'nasa') {
+      windRef.current.pause();
+    } else {
+      windRef.current.play().catch(() => {});
+    }
+  }, [view]);
 
   const playSkillVoice = useCallback(() => {
     const type = voicePattern[voiceIndexRef.current % voicePattern.length];
@@ -130,7 +154,14 @@ export default function App() {
     playAnim('burst');
     // Sky: sunset → night during burst
     setBurstSky(new Date('2024-06-21T17:30:00'));
-    setTimeout(() => setBurstSky(null), 4500);
+    if (windRef.current) { windRef.current.pause(); }
+    const burstSound = new Audio(`${import.meta.env.BASE_URL}sound/burst.mp3`);
+    burstSound.volume = volumeRef.current;
+    burstSound.play().catch(() => {});
+    setTimeout(() => {
+      setBurstSky(null);
+      if (windRef.current) { windRef.current.play().catch(() => {}); }
+    }, 4500);
     const suffix = langRef.current === 'en' ? '_en' : '';
     const file = `${import.meta.env.BASE_URL}voice/ai/burst_1${suffix}.mp3`;
     const audio = new Audio(file);