diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index 9ae6dbc..e60de55 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -12626,6 +12626,8 @@ const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExpor
               <span className="text-xs text-zinc-300">Realtime (bounce — chạy lại project thật, giữ nguyên MIDI + FX Rack + Mastering Chain)</span>
             </label>
           </div>
+        </div>
+        <div className="p-4 pt-3 border-t border-slate-700 space-y-2">
           {isExporting && (
             <div className="bg-[#141414] border border-zinc-800 rounded px-2 py-1.5">
               <div className="h-1.5 bg-zinc-800 rounded-full overflow-hidden">
@@ -12636,7 +12638,7 @@ const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExpor
               </div>
             </div>
           )}
-          <div className="grid grid-cols-2 gap-2 pt-1">
+          <div className="grid grid-cols-2 gap-2">
             <button onClick={onExport} disabled={isExporting}
               className="w-full py-1 bg-cyan-700 hover:bg-cyan-600 text-zinc-100 font-bold rounded text-xs flex items-center justify-center gap-1">
               <i data-lucide="download-cloud" className="w-3 h-3" /> {isExporting ? '...' : 'Export'}
@@ -28481,6 +28483,9 @@ const App = () => {
     setIsExporting(true);
     setExportProgress(5);
     showToast("Đang trộn âm thanh đa kênh (Offline Mixdown)...", "info");
+    // Yield 1 frame → React vẽ thanh "Đang xử lý..." trước khi graph build +
+    // OfflineAudioContext render chặn main thread.
+    await new Promise(res => setTimeout(res, 30));
     try {
       const targetRate = parseInt(exportSettings.sampleRate);
       const isFloatWav = exportSettings.bitDepth === 'float';
@@ -28673,26 +28678,33 @@ const App = () => {
       view.setUint32(40, exportLength * bytesPerSample * numExportCh, true);
       let offset = 44;
       let peak = 0;
-      for (let i = 0; i < exportLength; i++) {
-        if ((i & 0x3FFF) === 0) setExportProgress(60 + Math.round((i / Math.max(1, exportLength)) * 32));
-        for (let ch = 0; ch < numExportCh; ch++) {
-          const chData = renderedBuffer.getChannelData(ch);
-          const sample = Math.max(-1, Math.min(1, chData[i]));
-          if (Math.abs(sample) > peak) peak = Math.abs(sample);
-          if (bitDepth === 8) {
-            view.setUint8(offset, Math.floor((sample + 1.0) * 127.5));
-          } else if (bitDepth === 16) {
-            view.setInt16(offset, Math.floor(sample < 0 ? sample * 0x8000 : sample * 0x7FFF), true);
-          } else if (bitDepth === 24) {
-            const val24 = Math.floor(sample < 0 ? sample * 0x800000 : sample * 0x7FFFFF);
-            view.setUint8(offset, val24 & 0xFF);
-            view.setUint8(offset + 1, val24 >> 8 & 0xFF);
-            view.setUint8(offset + 2, val24 >> 16 & 0xFF);
-          } else if (isFloatWav) {
-            view.setFloat32(offset, sample, true);
+      // Chunk encode + yield giữa các chunk → React vẽ thanh tiến độ thật sự
+      // (vòng lặp đồng bộ dài sẽ chặn main thread, bar không bao giờ hiện).
+      const ENC_CHUNK = 65536;
+      for (let base = 0; base < exportLength; base += ENC_CHUNK) {
+        const encEnd = Math.min(exportLength, base + ENC_CHUNK);
+        for (let i = base; i < encEnd; i++) {
+          for (let ch = 0; ch < numExportCh; ch++) {
+            const chData = renderedBuffer.getChannelData(ch);
+            const sample = Math.max(-1, Math.min(1, chData[i]));
+            if (Math.abs(sample) > peak) peak = Math.abs(sample);
+            if (bitDepth === 8) {
+              view.setUint8(offset, Math.floor((sample + 1.0) * 127.5));
+            } else if (bitDepth === 16) {
+              view.setInt16(offset, Math.floor(sample < 0 ? sample * 0x8000 : sample * 0x7FFF), true);
+            } else if (bitDepth === 24) {
+              const val24 = Math.floor(sample < 0 ? sample * 0x800000 : sample * 0x7FFFFF);
+              view.setUint8(offset, val24 & 0xFF);
+              view.setUint8(offset + 1, val24 >> 8 & 0xFF);
+              view.setUint8(offset + 2, val24 >> 16 & 0xFF);
+            } else if (isFloatWav) {
+              view.setFloat32(offset, sample, true);
+            }
+            offset += bytesPerSample;
           }
-          offset += bytesPerSample;
         }
+        setExportProgress(60 + Math.round((encEnd / Math.max(1, exportLength)) * 32));
+        await new Promise(res => setTimeout(res, 0));
       }
       if (peak < 0.001) {
         showToast("Cảnh báo: file export gần như CÂM (không có tín hiệu âm) — kiểm tra nguồn track / MIDI cache preview.", "warning");
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 011eb22..6c5d1dc 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -857,7 +857,7 @@ const specMods=(spectrumModules?spectrumModules():null)||(getModule?[getModule()
 const applyAll=applyTo||(fn=>{if(typeof window!=='undefined'&&window.__getTrackFxModule){const a=window.__getTrackFxModule(track.id,'eqpro');if(a)fn(a);}if(typeof window!=='undefined'&&window.__getTrackSfFxModule){const b=window.__getTrackSfFxModule(track.id,'eqpro');if(b)fn(b);}});const onDown=e=>{const cv=canvasRef.current,w=cv.clientWidth,h=cv.clientHeight;const{x,y}=toLocal(e);const s=st.current;let hit=false;for(let i=0;i<s.bands.length;i++){const b=s.bands[i];if(Math.hypot(x-eqproFreqToX(b.freq,w),y-eqproGainToY(eqproNodeDb(b),h))<=10){s.selected=i;s.dragId=i;s.mode='center';hit=true;break;}}if(!hit&&s.selected!==null){const b=s.bands[s.selected];const nx=eqproFreqToX(b.freq,w),ny=eqproGainToY(eqproNodeDb(b),h),wo=eqproQToWing(b.q);if(Math.hypot(x-(nx-wo),y-ny)<=8||Math.hypot(x-(nx+wo),y-ny)<=8){s.dragId=s.selected;s.mode='wing';hit=true;}}if(!hit)s.selected=null;try{cv.setPointerCapture(e.pointerId);}catch(err){}setTick(t=>t+1);};const onMove=e=>{const s=st.current;if(s.dragId===null)return;const cv=canvasRef.current,w=cv.clientWidth,h=cv.clientHeight;const{x,y}=toLocal(e);const mx=Math.max(0,Math.min(w,x)),my=Math.max(0,Math.min(h,y));const b=s.bands[s.dragId];if(s.mode==='center'){const f=eqproClamp(parseFloat(eqproXToFreq(mx,w).toFixed(1)),EQPRO_F_MIN,EQPRO_F_MAX);// Filters without a Gain control (highpass/lowpass/notch/bandpass) stay on
 // the 0 dB axis — only frequency is draggable for them.
 const g=eqproBandHasGain(b.type)?eqproClamp(parseFloat(eqproYToGain(my,h).toFixed(1)),-EQPRO_MAX_DB,EQPRO_MAX_DB):0;b.freq=f;b.gain=g;applyAll(mm=>mm.setBand(s.dragId,{freq:f,gain:g}));}else if(s.mode==='wing'){const q=eqproWingToQ(Math.abs(mx-eqproFreqToX(b.freq,w)));b.q=q;applyAll(mm=>mm.setBand(s.dragId,{q}));}setTick(t=>t+1);};const onUp=e=>{const s=st.current;if(s.dragId!==null)commit();s.dragId=null;s.mode=null;try{canvasRef.current.releasePointerCapture(e.pointerId);}catch(err){}};const onWheel=e=>{e.preventDefault();const s=st.current;if(s.selected===null)return;const b=s.bands[s.selected];b.q=eqproClamp(parseFloat((b.q+(e.deltaY<0?0.2:-0.2)).toFixed(1)),0.1,18);applyAll(mm=>mm.setBand(s.selected,{q:b.q}));setTick(t=>t+1);};const onDblClick=e=>{const cv=canvasRef.current,w=cv.clientWidth,h=cv.clientHeight;const{x,y}=toLocal(e);const s=st.current;const hitIdx=s.bands.findIndex(b=>Math.hypot(x-eqproFreqToX(b.freq,w),y-eqproGainToY(b.gain,h))<=10);if(hitIdx!==-1){s.bands.splice(hitIdx,1);if(s.selected===hitIdx)s.selected=null;else if(s.selected!==null&&s.selected>hitIdx)s.selected--;}else{if(s.bands.length>=EQPRO_MAX_BANDS)return;s.bands.push({type:'peaking',freq:eqproClamp(parseFloat(eqproXToFreq(x,w).toFixed(1)),EQPRO_F_MIN,EQPRO_F_MAX),gain:eqproClamp(parseFloat(eqproYToGain(y,h).toFixed(1)),-EQPRO_MAX_DB,EQPRO_MAX_DB),q:1.2,active:true});s.selected=s.bands.length-1;}applyAll(mm=>mm.syncBands(s.bands));commit();setTick(t=>t+1);};const sel=st.current.selected!==null?st.current.bands[st.current.selected]:null;const selIdx=st.current.selected;const cvW=canvasRef.current?canvasRef.current.clientWidth:460;const cvH=240;const hudColor=selIdx!==null?EQPRO_BAND_COLORS[selIdx%EQPRO_BAND_COLORS.length]:EQPRO_BAND_COLORS[0];const hudXY=(()=>{if(st.current.hudPos){// Clamp so the HUD always stays inside the canvas area (buttons clickable).
-return{hx:Math.max(0,Math.min((canvasRef.current?canvasRef.current.clientWidth:460)-268,st.current.hudPos.hx)),hy:Math.max(0,Math.min((canvasRef.current?canvasRef.current.clientHeight:240)-225,st.current.hudPos.hy))};}if(!sel)return null;const nx=eqproFreqToX(sel.freq,cvW),ny=eqproGainToY(sel.gain,cvH);let hx=nx-130,hy=ny-195;if(hx<8)hx=8;if(hx>cvW-268)hx=cvW-268;if(hy<8)hy=ny+24;return{hx,hy};})();return/*#__PURE__*/React.createElement("div",{className:"space-y-2"},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between text-[11px] font-mono"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400"},"Bands: ",/*#__PURE__*/React.createElement("span",{className:"text-teal-300 font-bold"},st.current.bands.length),"/8"),/*#__PURE__*/React.createElement("label",{className:"flex items-center gap-1.5"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400"},"Amount:"),/*#__PURE__*/React.createElement("input",{type:"range",min:0,max:200,value:st.current.amount,onChange:e=>{st.current.amount=parseInt(e.target.value);applyAll(mm=>mm.setAmount(st.current.amount));commit();setTick(t=>t+1);},className:"w-20 h-1 cursor-pointer",style:{accentColor:'#2dd4bf'}}),/*#__PURE__*/React.createElement("span",{className:"text-teal-300 font-bold w-10"},st.current.amount,"%"))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1"},/*#__PURE__*/React.createElement("button",{onClick:()=>{const s=st.current;s.bands=JSON.parse(JSON.stringify(EQPRO_DEFAULT_BANDS));s.selected=null;applyAll(mm=>mm.syncBands(s.bands));commit();setTick(t=>t+1);},className:"px-2 py-1 bg-slate-800 hover:bg-red-900/60 text-slate-300 border border-slate-700 rounded text-[10px]"},"Reset"),/*#__PURE__*/React.createElement("button",{onClick:()=>{const s=st.current;if(s.bands.length>=EQPRO_MAX_BANDS)return;s.bands.push({type:'peaking',freq:1000,gain:0,q:1.0,active:true});s.selected=s.bands.length-1;applyAll(mm=>mm.syncBands(s.bands));commit();setTick(t=>t+1);},className:"px-2 py-1 bg-teal-900/50 hover:bg-teal-800 text-teal-300 border border-teal-700 rounded text-[10px]"},"+ Band"))),/*#__PURE__*/React.createElement("div",{className:"relative"},/*#__PURE__*/React.createElement("canvas",{ref:canvasRef,className:"w-full h-60 block cursor-crosshair rounded-lg border border-slate-800 bg-slate-950",onPointerDown:onDown,onPointerMove:onMove,onPointerUp:onUp,onWheel:onWheel,onDoubleClick:onDblClick}),sel&&hudXY&&/*#__PURE__*/React.createElement("div",{className:"absolute z-10 w-64 rounded-xl p-3 text-[11px] font-mono space-y-2 pointer-events-auto cursor-move",style:{left:hudXY.hx,top:hudXY.hy,background:'rgba(15,23,42,0.94)',border:'1px solid rgba(45,212,191,0.3)',boxShadow:'0 10px 30px rgba(0,0,0,0.8)',backdropFilter:'blur(12px)'},onPointerDown:e=>{const s=st.current;s.dragHud=true;const r=e.currentTarget.getBoundingClientRect();s.hudOffsetX=e.clientX-r.left;s.hudOffsetY=e.clientY-r.top;e.currentTarget.setPointerCapture(e.pointerId);},onPointerMove:e=>{const s=st.current;if(!s.dragHud)return;const cv=canvasRef.current;const w=cv?cv.clientWidth:460;s.hudPos={hx:Math.max(0,Math.min(w-268,e.clientX-s.hudOffsetX-(cv?cv.getBoundingClientRect().left:0))),hy:Math.max(0,e.clientY-s.hudOffsetY-(cv?cv.getBoundingClientRect().top:0))};setTick(t=>t+1);},onPointerUp:e=>{st.current.dragHud=false;try{e.currentTarget.releasePointerCapture(e.pointerId);}catch(err){}}},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between border-b border-slate-700/80 pb-1.5"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2"},/*#__PURE__*/React.createElement("span",{className:"w-4 h-4 rounded-full text-slate-950 font-bold flex items-center justify-center text-[10px]",style:{background:hudColor.badge}},selIdx+1),/*#__PURE__*/React.createElement("span",{className:"font-bold text-white uppercase tracking-wider"},"Band ",selIdx+1)),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1"},/*#__PURE__*/React.createElement("button",{title:"Bypass band",onClick:()=>{const s=st.current;s.bands[s.selected].active=!s.bands[s.selected].active;applyAll(mm=>mm.setBand(s.selected,{active:s.bands[s.selected].active}));commit();setTick(t=>t+1);},className:`w-5 h-5 rounded flex items-center justify-center text-[10px] ${sel.active?'bg-slate-800 text-slate-400':'bg-amber-600 text-white'}`},/*#__PURE__*/React.createElement("i",{className:"fa-solid fa-power-off"})),/*#__PURE__*/React.createElement("button",{title:"Delete band",onClick:()=>{const s=st.current;s.bands.splice(s.selected,1);s.selected=null;applyAll(mm=>mm.syncBands(s.bands));commit();setTick(t=>t+1);},className:"w-5 h-5 rounded bg-slate-800 hover:bg-red-600 text-slate-400 hover:text-white flex items-center justify-center text-[10px]"},/*#__PURE__*/React.createElement("i",{className:"fa-solid fa-xmark"})))),/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("label",{className:"block text-[9px] text-slate-400 uppercase tracking-widest mb-1"},"Filter Shape"),/*#__PURE__*/React.createElement("select",{value:sel.type,onChange:ev=>{const s=st.current;s.bands[s.selected].type=ev.target.value;applyAll(mm=>mm.setBand(s.selected,{type:ev.target.value}));commit();setTick(t=>t+1);},className:"w-full bg-slate-950 border border-slate-700 text-teal-300 rounded px-2 py-1 text-[11px] outline-none"},['peaking','highpass','lowpass','lowshelf','highshelf','notch','bandpass'].map(t=>/*#__PURE__*/React.createElement("option",{key:t,value:t},t==='peaking'?'Bell / Peaking':t==='highpass'?'Low Cut / High Pass':t==='lowpass'?'High Cut / Low Pass':t==='lowshelf'?'Low Shelf':t==='highshelf'?'High Shelf':t==='notch'?'Notch / Band Stop':'Band Pass')))),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-3 gap-2 text-center bg-slate-950/80 p-2 rounded-lg border border-slate-800"},/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("div",{className:"text-[9px] text-slate-500"},"FREQ"),/*#__PURE__*/React.createElement("div",{className:"text-teal-300 font-bold text-[11px]"},sel.freq>=1000?(sel.freq/1000).toFixed(2)+' kHz':Math.round(sel.freq)+' Hz')),/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("div",{className:"text-[9px] text-slate-500"},"GAIN"),/*#__PURE__*/React.createElement("div",{className:"text-amber-400 font-bold text-[11px]"},eqproBandHasGain(sel.type)?(sel.gain>0?'+':'')+sel.gain.toFixed(1)+' dB':'0.0 dB')),/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("div",{className:"text-[9px] text-slate-500"},"Q"),/*#__PURE__*/React.createElement("div",{className:"text-purple-400 font-bold text-[11px]"},sel.q.toFixed(1)))),/*#__PURE__*/React.createElement("div",{className:"text-[9px] text-slate-500 text-center"},"Drag center: Freq & Gain · Wings/Wheel: Q · Dbl-click: add/delete"))));};const ExportModal=({open,onClose,exportSettings,setExportSettings,isExporting,exportProgress,onExport})=>{if(!open)return null;const pickDir=async()=>{try{const r=await fetch(`${API_BASE_URL}/api/v1/plugins/pick-dir`,{method:'POST'});if(r.ok){const d=await r.json();if(d&&d.path)setExportSettings(p=>({...p,exportDir:d.path}));}}catch(e){}};return/*#__PURE__*/React.createElement("div",{className:"fixed inset-0 z-[300] bg-black/70 backdrop-blur-sm flex items-center justify-center p-6",onClick:onClose},/*#__PURE__*/React.createElement("div",{className:"w-full max-w-2xl bg-slate-900 border border-slate-700 rounded-2xl shadow-2xl overflow-hidden",onClick:e=>e.stopPropagation()},/*#__PURE__*/React.createElement("div",{className:"h-9 bg-slate-800/80 border-b border-slate-700 flex items-center 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gap-2"},/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("label",{className:"block text-[7px] text-zinc-500 font-bold uppercase mb-0.5"},"Nguồn"),/*#__PURE__*/React.createElement("select",{value:exportSettings.source,onChange:e=>setExportSettings(p=>({...p,source:e.target.value})),className:"w-full bg-[#141414] border border-zinc-800 rounded px-1 py-0.5 text-xs text-zinc-300 focus:outline-none"},/*#__PURE__*/React.createElement("option",{value:"project"},"Project (Mix)"),/*#__PURE__*/React.createElement("option",{value:"track_mix"},"Track Selection"),/*#__PURE__*/React.createElement("option",{value:"active_clip"},"Active Clip"),/*#__PURE__*/React.createElement("option",{value:"clip_selection"},"Clip Selection"))),/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("label",{className:"block text-[7px] text-zinc-500 font-bold uppercase mb-0.5"},"Định 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cursor-pointer"},/*#__PURE__*/React.createElement("input",{type:"checkbox",checked:!!exportSettings.dither,onChange:e=>setExportSettings(p=>({...p,dither:e.target.checked})),className:"accent-cyan-500 w-3.5 h-3.5"}),/*#__PURE__*/React.createElement("span",{className:"text-xs text-zinc-300"},"Dither TPDF (PCM 16/24)")),/*#__PURE__*/React.createElement("label",{className:"flex items-center gap-1.5 cursor-pointer"},/*#__PURE__*/React.createElement("input",{type:"checkbox",checked:!!exportSettings.normalize,onChange:e=>setExportSettings(p=>({...p,normalize:e.target.checked})),className:"accent-cyan-500 w-3.5 h-3.5"}),/*#__PURE__*/React.createElement("span",{className:"text-xs text-zinc-300"},"Normalize")),/*#__PURE__*/React.createElement("label",{className:"flex items-center gap-1.5 cursor-pointer"},/*#__PURE__*/React.createElement("input",{type:"checkbox",checked:!!exportSettings.monoCheck,onChange:e=>setExportSettings(p=>({...p,monoCheck:e.target.checked})),className:"accent-cyan-500 w-3.5 h-3.5"}),/*#__PURE__*/React.createElement("span",{className:"text-xs text-zinc-300"},"Cảnh báo mono (side/mid)")),/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("label",{className:"block text-[7px] text-zinc-500 font-bold uppercase mb-0.5"},"Normalize target"),/*#__PURE__*/React.createElement("select",{value:exportSettings.normalizeTarget,onChange:e=>setExportSettings(p=>({...p,normalizeTarget:e.target.value})),className:"w-full bg-[#141414] border border-zinc-800 rounded px-1 py-0.5 text-xs text-zinc-300 focus:outline-none"},/*#__PURE__*/React.createElement("option",{value:"-1dbtp"},"-1 dBTP"),/*#__PURE__*/React.createElement("option",{value:"-14lufs"},"-14 LUFS")))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2 pt-1 bg-[#141414] border border-zinc-800 rounded px-2 py-1.5"},/*#__PURE__*/React.createElement("label",{className:"flex items-center gap-1.5 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focus:outline-none"})),/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("label",{className:"block text-[7px] text-zinc-500 font-bold uppercase mb-0.5"},"ISRC"),/*#__PURE__*/React.createElement("input",{type:"text",value:exportSettings.metaIsrc,maxLength:"12",onChange:e=>setExportSettings(p=>({...p,metaIsrc:e.target.value.toUpperCase()})),placeholder:"US-ABC-26-00001",className:"w-full bg-[#141414] border border-zinc-800 rounded px-1 py-0.5 text-xs text-zinc-300 focus:outline-none"}))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2 bg-[#141414] border border-zinc-800 rounded px-2 py-1.5"},/*#__PURE__*/React.createElement("label",{className:"flex items-center gap-1.5 cursor-pointer"},/*#__PURE__*/React.createElement("input",{type:"checkbox",checked:!!exportSettings.realtime,onChange:e=>setExportSettings(p=>({...p,realtime:e.target.checked})),className:"accent-cyan-500 w-3.5 h-3.5"}),/*#__PURE__*/React.createElement("span",{className:"text-xs text-zinc-300"},"Realtime (bounce — chạy lại project thật, giữ nguyên MIDI + FX Rack + Mastering Chain)")))),/*#__PURE__*/React.createElement("div",{className:"p-4 pt-3 border-t border-slate-700 space-y-2"},isExporting&&/*#__PURE__*/React.createElement("div",{className:"bg-[#141414] border border-zinc-800 rounded px-2 py-1.5"},/*#__PURE__*/React.createElement("div",{className:"h-1.5 bg-zinc-800 rounded-full overflow-hidden"},/*#__PURE__*/React.createElement("div",{className:"h-full bg-cyan-500 transition-all duration-200",style:{width:(exportProgress>=0?exportProgress:25)+'%'}})),/*#__PURE__*/React.createElement("div",{className:"text-[8px] text-zinc-500 mt-1"},exportProgress>=0?'Đang xuất... '+Math.round(exportProgress)+'%':'Đang xử lý...')),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-2 gap-2"},/*#__PURE__*/React.createElement("button",{onClick:onExport,disabled:isExporting,className:"w-full py-1 bg-cyan-700 hover:bg-cyan-600 text-zinc-100 font-bold rounded text-xs flex items-center justify-center gap-1"},/*#__PURE__*/React.createElement("i",{"data-lucide":"download-cloud",className:"w-3 h-3"})," ",isExporting?'...':'Export'),/*#__PURE__*/React.createElement("button",{onClick:onClose,disabled:isExporting,className:"w-full py-1 bg-zinc-700 hover:bg-zinc-600 text-zinc-100 font-bold rounded text-xs"},"Hủy")))));};// --- Embedded VST GUI (PLAN_MASTERBUS_VST_GUI_EMBED.md) --------------------
 // Frame-capture + input relay: hiển thị native GUI qua HTTP /frame (~10fps),
 // gửi pointer/key về bridge qua /input. Dùng chung MasteringModal + FXRackModal.
 // url = embed_url từ API fx-gui open (embed:true); onClose khi user đóng;
@@ -2153,7 +2153,9 @@ var srcMidi=0,srcClip=0,srcSec=0;tracks.forEach(function(t){srcMidi+=(t.midiItem
 // Projects). Docker/headless: lưu lên Cloud (đã login) hoặc local (.sfs).
 const handleGlobalSave=async()=>{try{const finalName=projectName||'Dự án mới';const schemaObj=serializeProjectToSchema(currentProjectId||'proj_'+Date.now(),finalName,bpm,tracks,subTabs,sessionTabs,masteringSettings,masterVolume,{volL:masterVolL,volR:masterVolR,link:masterLink,muted:masterMuted});const dataJson=JSON.stringify(schemaObj);const runtime=window.SonicRuntime&&window.SonicRuntime.capabilities&&window.SonicRuntime.capabilities.runtime||'';if(runtime==='desktop'&&window.SonicAPI&&window.SonicAPI.saveProjectToDisk){// Desktop → thư mục của hệ điều hành
 const res=await window.SonicAPI.saveProjectToDisk(finalName,dataJson);showToast('Đã lưu dự án: '+(res&&res.path||finalName),'success');}else if(window.SonicAPI){// Docker / headless → Cloud (nếu đã đăng nhập), ngược lại local
-if(currentProjectId&&!currentProjectId.startsWith('local_')&&currentUser){await window.SonicAPI.updateCloudProject(currentProjectId,finalName,dataJson);showToast('Đã lưu dự án lên Cloud','success');}else if(currentUser){await handleSaveAsCloud(finalName);}else{handleSaveLocalProject(finalName);}}}catch(err){showToast('Lỗi lưu dự án: '+(err.message||err),'error');}};const handleGlobalSaveRef=useRef(handleGlobalSave);handleGlobalSaveRef.current=handleGlobalSave;useEffect(()=>{const handler=e=>{if((e.ctrlKey||e.metaKey)&&e.key.toLowerCase()==='s'){const target=e.target;if(target&&(target.tagName==='INPUT'||target.tagName==='TEXTAREA'||target.isContentEditable))return;e.preventDefault();handleGlobalSaveRef.current();}};window.addEventListener('keydown',handler);return()=>window.removeEventListener('keydown',handler);},[]);const handleSaveAsCloud=async newName=>{const projectSchemaObj=serializeProjectToSchema('project_'+Date.now(),newName,bpm,tracks,subTabs,sessionTabs,masteringSettings,masterVolume,{volL:masterVolL,volR:masterVolR,link:masterLink,muted:masterMuted});const dataJson=JSON.stringify(projectSchemaObj);try{const res=await window.SonicAPI.saveCloudProject(newName,dataJson);const newProjId=res.project_id;setProjectName(newName);localStorage.setItem('sonic_project_name',newName);if(newProjId){setCurrentProjectId(newProjId);localStorage.setItem('sonic_project_id',newProjId);}showToast(`Đã lưu dự án dưới tên mới "${newName}" lên server!`,"success");}catch(err){showToast(err.message||"Lỗi Save As lên server","error");}};const handleSaveCloud=handleSaveProject;const handleExportSFS=(customName=null)=>{const finalName=customName||projectName||'Dự án SonicForge';const projectSchemaObj=serializeProjectToSchema(currentProjectId||'proj_'+Date.now(),finalName,bpm,tracks,subTabs,sessionTabs,masteringSettings,masterVolume,{volL:masterVolL,volR:masterVolR,link:masterLink,muted:masterMuted});window.SonicStorage.exportProjectToSFS(projectSchemaObj);showToast("Đã xuất dự án (.sfs) thành công!","success");};const handleImportSFS=()=>{const input=document.createElement('input');input.type='file';input.accept='.sfs,application/json';input.onchange=async e=>{if(!e.target.files[0])return;try{const proj=await window.SonicStorage.importProjectFromSFSFile(e.target.files[0]);let restored=[];let restoredBpm=bpm;let restoredSessionTabs=[];let restoredSubTabs=[];if(proj.main_session){const result=deserializeProjectFromSchema(proj);restored=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;if(result.masteringSettings)setMasteringSettings(result.masteringSettings);if(result.masterVolume!==undefined&&result.masterVolume!==null)setMasterVolume(result.masterVolume);if(result.masterVolL!==undefined&&result.masterVolL!==null)setMasterVolL(result.masterVolL);if(result.masterVolR!==undefined&&result.masterVolR!==null)setMasterVolR(result.masterVolR);if(result.masterLink!==undefined&&result.masterLink!==null)setMasterLink(result.masterLink);if(result.masterMuted!==undefined&&result.masterMuted!==null)setMasterMuted(result.masterMuted);if(result.masterAutoVol!==undefined)setMasterAutoVol(result.masterAutoVol);if(result.masterAutoOn!==undefined)setMasterAutoOn(result.masterAutoOn);}else{restored=(proj.tracks||[]).map(t=>({...t,buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null}));}if(restored.length>0){setTracks(restored);loadAudioBuffersForTracks(restored);setBpm(restoredBpm.toString());setProjectName(proj.name||'Dự án mới');setCurrentProjectId(null);if(restoredSessionTabs.length>0)setSessionTabs(restoredSessionTabs);if(restoredSubTabs.length>0)setSubTabs(restoredSubTabs);localStorage.setItem('sonic_project_name',proj.name||'Dự án mới');localStorage.removeItem('sonic_project_id');showToast(`Đã nạp dự án "${proj.name||'Dự án mới'}" từ tệp .sfs thành công!`,"success");}}catch(err){showToast(err.message||"Lỗi mở tệp .sfs","error");}};input.click();};const clientSideExport=async(activeTracks,loopInfo)=>{setIsExporting(true);setExportProgress(5);showToast("Đang trộn âm thanh đa kênh (Offline Mixdown)...","info");try{const targetRate=parseInt(exportSettings.sampleRate);const isFloatWav=exportSettings.bitDepth==='float';const bitDepth=isFloatWav?32:parseInt(exportSettings.bitDepth);// MAIN SESSION end time (items trên track main — sections theo bounds) —
+if(currentProjectId&&!currentProjectId.startsWith('local_')&&currentUser){await window.SonicAPI.updateCloudProject(currentProjectId,finalName,dataJson);showToast('Đã lưu dự án lên Cloud','success');}else if(currentUser){await handleSaveAsCloud(finalName);}else{handleSaveLocalProject(finalName);}}}catch(err){showToast('Lỗi lưu dự án: '+(err.message||err),'error');}};const handleGlobalSaveRef=useRef(handleGlobalSave);handleGlobalSaveRef.current=handleGlobalSave;useEffect(()=>{const handler=e=>{if((e.ctrlKey||e.metaKey)&&e.key.toLowerCase()==='s'){const target=e.target;if(target&&(target.tagName==='INPUT'||target.tagName==='TEXTAREA'||target.isContentEditable))return;e.preventDefault();handleGlobalSaveRef.current();}};window.addEventListener('keydown',handler);return()=>window.removeEventListener('keydown',handler);},[]);const handleSaveAsCloud=async newName=>{const projectSchemaObj=serializeProjectToSchema('project_'+Date.now(),newName,bpm,tracks,subTabs,sessionTabs,masteringSettings,masterVolume,{volL:masterVolL,volR:masterVolR,link:masterLink,muted:masterMuted});const dataJson=JSON.stringify(projectSchemaObj);try{const res=await window.SonicAPI.saveCloudProject(newName,dataJson);const newProjId=res.project_id;setProjectName(newName);localStorage.setItem('sonic_project_name',newName);if(newProjId){setCurrentProjectId(newProjId);localStorage.setItem('sonic_project_id',newProjId);}showToast(`Đã lưu dự án dưới tên mới "${newName}" lên server!`,"success");}catch(err){showToast(err.message||"Lỗi Save As lên server","error");}};const handleSaveCloud=handleSaveProject;const handleExportSFS=(customName=null)=>{const finalName=customName||projectName||'Dự án SonicForge';const projectSchemaObj=serializeProjectToSchema(currentProjectId||'proj_'+Date.now(),finalName,bpm,tracks,subTabs,sessionTabs,masteringSettings,masterVolume,{volL:masterVolL,volR:masterVolR,link:masterLink,muted:masterMuted});window.SonicStorage.exportProjectToSFS(projectSchemaObj);showToast("Đã xuất dự án (.sfs) thành công!","success");};const handleImportSFS=()=>{const input=document.createElement('input');input.type='file';input.accept='.sfs,application/json';input.onchange=async e=>{if(!e.target.files[0])return;try{const proj=await window.SonicStorage.importProjectFromSFSFile(e.target.files[0]);let restored=[];let restoredBpm=bpm;let restoredSessionTabs=[];let restoredSubTabs=[];if(proj.main_session){const result=deserializeProjectFromSchema(proj);restored=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;if(result.masteringSettings)setMasteringSettings(result.masteringSettings);if(result.masterVolume!==undefined&&result.masterVolume!==null)setMasterVolume(result.masterVolume);if(result.masterVolL!==undefined&&result.masterVolL!==null)setMasterVolL(result.masterVolL);if(result.masterVolR!==undefined&&result.masterVolR!==null)setMasterVolR(result.masterVolR);if(result.masterLink!==undefined&&result.masterLink!==null)setMasterLink(result.masterLink);if(result.masterMuted!==undefined&&result.masterMuted!==null)setMasterMuted(result.masterMuted);if(result.masterAutoVol!==undefined)setMasterAutoVol(result.masterAutoVol);if(result.masterAutoOn!==undefined)setMasterAutoOn(result.masterAutoOn);}else{restored=(proj.tracks||[]).map(t=>({...t,buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null}));}if(restored.length>0){setTracks(restored);loadAudioBuffersForTracks(restored);setBpm(restoredBpm.toString());setProjectName(proj.name||'Dự án mới');setCurrentProjectId(null);if(restoredSessionTabs.length>0)setSessionTabs(restoredSessionTabs);if(restoredSubTabs.length>0)setSubTabs(restoredSubTabs);localStorage.setItem('sonic_project_name',proj.name||'Dự án mới');localStorage.removeItem('sonic_project_id');showToast(`Đã nạp dự án "${proj.name||'Dự án mới'}" từ tệp .sfs thành công!`,"success");}}catch(err){showToast(err.message||"Lỗi mở tệp .sfs","error");}};input.click();};const clientSideExport=async(activeTracks,loopInfo)=>{setIsExporting(true);setExportProgress(5);showToast("Đang trộn âm thanh đa kênh (Offline Mixdown)...","info");// Yield 1 frame → React vẽ thanh "Đang xử lý..." trước khi graph build +
+// OfflineAudioContext render chặn main thread.
+await new Promise(res=>setTimeout(res,30));try{const targetRate=parseInt(exportSettings.sampleRate);const isFloatWav=exportSettings.bitDepth==='float';const bitDepth=isFloatWav?32:parseInt(exportSettings.bitDepth);// MAIN SESSION end time (items trên track main — sections theo bounds) —
 // offline render không cắt sớm; MIDI cache (preview) giữ max với cache.
 // LOOP export: độ dài chính xác = loopDur (không kéo đuôi, không fade)
 let durationLimit=loopInfo&&loopInfo.loopDur?loopInfo.loopDur:Math.max(0.1,computeMainSessionEndTime(activeTracks));// Include preview-captured MIDI cache length (soundfont tracks have no clips)
@@ -2171,7 +2173,9 @@ try{if(masterBus&&masterBus.output){const mv=typeof masterVolume==='number'&&isF
 // VST chain qua fx_vst_bridge → cộng mix → mastering built-in 1 lần
 // trên tổng → master VST chain cuối chain. Đúng thứ tự live: track fx
 // → (sum) → master fx → out.
-let mix=null;let vstTi=0;for(const t of activeTracks){setExportProgress(10+Math.round(vstTi/Math.max(1,activeTracks.length)*40));vstTi++;const chain=activeVstChain(t.vstFxChain||[]);const tctx=new OfflineAudioContext(2,Math.ceil(targetRate*Math.max(0.1,durationLimit)),targetRate);const tNodes={};const node=scheduleTrackInto(t,tctx,tNodes,true);if(!node)continue;const tb=await tctx.startRendering();try{if(node.fxStopFn)node.fxStopFn();}catch(e){}let pcm=audioBufferToInterleaved(tb).pcm;if(chain.length)pcm=await applyVstChainToPcm(pcm,targetRate,chain,t.name||'track');mix=mix?mixInterleaved(mix,pcm):pcm;}if(!mix)mix=new Float32Array(Math.ceil(targetRate*Math.max(0.1,durationLimit))*2);const mctx=new OfflineAudioContext(2,Math.floor(mix.length/2),targetRate);masterBus=null;initMasterBus(mctx);try{toggleMasteringOnMaster(!!(masteringSettings&&masteringSettings.masterConnected),!!(masteringSettings&&masteringSettings.isBypassed));}catch(e){console.warn('offline mastering toggle error (vst):',e);}try{if(masterBus&&masterBus.output){const mv=typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0;applyMasterVolumesTo(masterBus,masterVolL,masterLink?masterVolL:masterVolR,!!masterMuted,0);}}catch(e){console.warn('offline main-out volume error (vst):',e);}const src=mctx.createBufferSource();src.buffer=interleavedToAudioBuffer(mix,targetRate,2,mctx);src.connect(masterBus.input);src.start(0);renderedBuffer=await mctx.startRendering();if(masterVstOn){const conv=audioBufferToInterleaved(renderedBuffer);let outPcm=await applyVstChainToPcm(conv.pcm,targetRate,masterVstChain,'master');if(outChannels===1){const n=Math.floor(outPcm.length/2);const mono=new Float32Array(n);for(let i=0;i<n;i++)mono[i]=(outPcm[i*2]+outPcm[i*2+1])*0.5;outPcm=mono;}renderedBuffer=interleavedToAudioBuffer(outPcm,targetRate,outChannels,mctx);}}else{activeTracks.forEach(t=>{scheduleTrackInto(t,offlineCtx,offlineNodes,false);});renderedBuffer=await offlineCtx.startRendering();}setExportProgress(60);const numExportCh=renderedBuffer.numberOfChannels;const exportLength=renderedBuffer.length;const bytesPerSample=bitDepth/8;const headerSize=44;const fileSizeBytes=headerSize+exportLength*bytesPerSample*numExportCh;const fileBuffer=new ArrayBuffer(fileSizeBytes);const view=new DataView(fileBuffer);const writeString=(offset,string)=>{for(let i=0;i<string.length;i++){view.setUint8(offset+i,string.charCodeAt(i));}};writeString(0,'RIFF');view.setUint32(4,fileSizeBytes-8,true);writeString(8,'WAVE');writeString(12,'fmt ');view.setUint32(16,16,true);view.setUint16(20,isFloatWav?3:1,true);view.setUint16(22,numExportCh,true);view.setUint32(24,targetRate,true);view.setUint32(28,targetRate*bytesPerSample*numExportCh,true);view.setUint16(32,bytesPerSample,true);view.setUint16(34,bitDepth,true);writeString(36,'data');view.setUint32(40,exportLength*bytesPerSample*numExportCh,true);let offset=44;let peak=0;for(let i=0;i<exportLength;i++){if((i&0x3FFF)===0)setExportProgress(60+Math.round(i/Math.max(1,exportLength)*32));for(let ch=0;ch<numExportCh;ch++){const chData=renderedBuffer.getChannelData(ch);const sample=Math.max(-1,Math.min(1,chData[i]));if(Math.abs(sample)>peak)peak=Math.abs(sample);if(bitDepth===8){view.setUint8(offset,Math.floor((sample+1.0)*127.5));}else if(bitDepth===16){view.setInt16(offset,Math.floor(sample<0?sample*0x8000:sample*0x7FFF),true);}else if(bitDepth===24){const val24=Math.floor(sample<0?sample*0x800000:sample*0x7FFFFF);view.setUint8(offset,val24&0xFF);view.setUint8(offset+1,val24>>8&0xFF);view.setUint8(offset+2,val24>>16&0xFF);}else if(isFloatWav){view.setFloat32(offset,sample,true);}offset+=bytesPerSample;}}if(peak<0.001){showToast("Cảnh báo: file export gần như CÂM (không có tín hiệu âm) — kiểm tra nguồn track / MIDI cache preview.","warning");}const blob=new Blob([view],{type:'audio/wav'});const wavName=`sonicforge-session-${targetRate}hz-${bitDepth}bit.wav`;setExportProgress(95);if((exportSettings.format==='mp3'||exportSettings.format==='ogg')&&serverStatus==='connected'){setIsExporting(true);setExportProgress(-1);showToast("Đang gửi yêu cầu nén định dạng lên máy chủ...","info");try{const file=new File([blob],`session_export.wav`,{type:'audio/wav'});const formData=new FormData();formData.append('file',file);const uploadResp=await fetch(`${API_AUDIO}/upload`,{method:'POST',body:formData});if(!uploadResp.ok)throw new Error("Upload to transcode server failed");const uploadData=await uploadResp.json();const fileId=uploadData.file_id;const exportResp=await fetch(`${API_AUDIO}/export`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({file_id:fileId,format:exportSettings.format,sample_rate:targetRate,bit_depth:bitDepth})});if(!exportResp.ok)throw new Error("Transcode request failed");const exportData=await exportResp.json();const result=await pollTaskResult(exportData.task_id,20);if(result.success){const outId=result.output_file_id;const downloadUrl=`${API_AUDIO}/download/${outId}`;showToast(`Xuất bản âm thanh định dạng ${exportSettings.format.toUpperCase()} thành công!`,"success","Tải về",async()=>{try{const br=await fetch(downloadUrl);if(!br.ok)throw new Error('HTTP '+br.status);const b=await br.blob();const sp=await saveExportViaDialog(`sonicforge-session-${targetRate}hz-${bitDepth}bit.${exportSettings.format}`,b);if(sp)showToast(`Đã lưu → ${sp}`,"success");}catch(e){const a=document.createElement('a');a.href=downloadUrl;a.download=`sonicforge-session-${targetRate}hz-${bitDepth}bit.${exportSettings.format}`;a.click();}});}else{throw new Error(result.error||'Server encoding failed');}}catch(transcodeErr){showToast(`Lỗi chuyển đổi: ${transcodeErr.message}.`,"warning","Tải WAV thay thế",()=>{downloadBlobViaServer(blob,wavName).catch(()=>{});});}}else{if(exportSettings.format!=='wav'){showToast("Đang ngoại tuyến. Tải về định dạng WAV thay thế.","warning");}const dres=await downloadBlobViaServer(blob,wavName).catch(()=>null);if(dres&&dres.saved_path){showToast(`Xuất bản âm thanh hoàn tất → ${dres.saved_path}`,"success");}else{showToast("Xuất bản âm thanh hoàn tất!","success");}}}finally{// Restore the LIVE master bus after offline render: initMasterBus(offlineCtx)
+let mix=null;let vstTi=0;for(const t of activeTracks){setExportProgress(10+Math.round(vstTi/Math.max(1,activeTracks.length)*40));vstTi++;const chain=activeVstChain(t.vstFxChain||[]);const tctx=new OfflineAudioContext(2,Math.ceil(targetRate*Math.max(0.1,durationLimit)),targetRate);const tNodes={};const node=scheduleTrackInto(t,tctx,tNodes,true);if(!node)continue;const tb=await tctx.startRendering();try{if(node.fxStopFn)node.fxStopFn();}catch(e){}let pcm=audioBufferToInterleaved(tb).pcm;if(chain.length)pcm=await applyVstChainToPcm(pcm,targetRate,chain,t.name||'track');mix=mix?mixInterleaved(mix,pcm):pcm;}if(!mix)mix=new Float32Array(Math.ceil(targetRate*Math.max(0.1,durationLimit))*2);const mctx=new OfflineAudioContext(2,Math.floor(mix.length/2),targetRate);masterBus=null;initMasterBus(mctx);try{toggleMasteringOnMaster(!!(masteringSettings&&masteringSettings.masterConnected),!!(masteringSettings&&masteringSettings.isBypassed));}catch(e){console.warn('offline mastering toggle error (vst):',e);}try{if(masterBus&&masterBus.output){const mv=typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0;applyMasterVolumesTo(masterBus,masterVolL,masterLink?masterVolL:masterVolR,!!masterMuted,0);}}catch(e){console.warn('offline main-out volume error (vst):',e);}const src=mctx.createBufferSource();src.buffer=interleavedToAudioBuffer(mix,targetRate,2,mctx);src.connect(masterBus.input);src.start(0);renderedBuffer=await mctx.startRendering();if(masterVstOn){const conv=audioBufferToInterleaved(renderedBuffer);let outPcm=await applyVstChainToPcm(conv.pcm,targetRate,masterVstChain,'master');if(outChannels===1){const n=Math.floor(outPcm.length/2);const mono=new Float32Array(n);for(let i=0;i<n;i++)mono[i]=(outPcm[i*2]+outPcm[i*2+1])*0.5;outPcm=mono;}renderedBuffer=interleavedToAudioBuffer(outPcm,targetRate,outChannels,mctx);}}else{activeTracks.forEach(t=>{scheduleTrackInto(t,offlineCtx,offlineNodes,false);});renderedBuffer=await offlineCtx.startRendering();}setExportProgress(60);const numExportCh=renderedBuffer.numberOfChannels;const exportLength=renderedBuffer.length;const bytesPerSample=bitDepth/8;const headerSize=44;const fileSizeBytes=headerSize+exportLength*bytesPerSample*numExportCh;const fileBuffer=new ArrayBuffer(fileSizeBytes);const view=new DataView(fileBuffer);const writeString=(offset,string)=>{for(let i=0;i<string.length;i++){view.setUint8(offset+i,string.charCodeAt(i));}};writeString(0,'RIFF');view.setUint32(4,fileSizeBytes-8,true);writeString(8,'WAVE');writeString(12,'fmt ');view.setUint32(16,16,true);view.setUint16(20,isFloatWav?3:1,true);view.setUint16(22,numExportCh,true);view.setUint32(24,targetRate,true);view.setUint32(28,targetRate*bytesPerSample*numExportCh,true);view.setUint16(32,bytesPerSample,true);view.setUint16(34,bitDepth,true);writeString(36,'data');view.setUint32(40,exportLength*bytesPerSample*numExportCh,true);let offset=44;let peak=0;// Chunk encode + yield giữa các chunk → React vẽ thanh tiến độ thật sự
+// (vòng lặp đồng bộ dài sẽ chặn main thread, bar không bao giờ hiện).
+const ENC_CHUNK=65536;for(let base=0;base<exportLength;base+=ENC_CHUNK){const encEnd=Math.min(exportLength,base+ENC_CHUNK);for(let i=base;i<encEnd;i++){for(let ch=0;ch<numExportCh;ch++){const chData=renderedBuffer.getChannelData(ch);const sample=Math.max(-1,Math.min(1,chData[i]));if(Math.abs(sample)>peak)peak=Math.abs(sample);if(bitDepth===8){view.setUint8(offset,Math.floor((sample+1.0)*127.5));}else if(bitDepth===16){view.setInt16(offset,Math.floor(sample<0?sample*0x8000:sample*0x7FFF),true);}else if(bitDepth===24){const val24=Math.floor(sample<0?sample*0x800000:sample*0x7FFFFF);view.setUint8(offset,val24&0xFF);view.setUint8(offset+1,val24>>8&0xFF);view.setUint8(offset+2,val24>>16&0xFF);}else if(isFloatWav){view.setFloat32(offset,sample,true);}offset+=bytesPerSample;}}setExportProgress(60+Math.round(encEnd/Math.max(1,exportLength)*32));await new Promise(res=>setTimeout(res,0));}if(peak<0.001){showToast("Cảnh báo: file export gần như CÂM (không có tín hiệu âm) — kiểm tra nguồn track / MIDI cache preview.","warning");}const blob=new Blob([view],{type:'audio/wav'});const wavName=`sonicforge-session-${targetRate}hz-${bitDepth}bit.wav`;setExportProgress(95);if((exportSettings.format==='mp3'||exportSettings.format==='ogg')&&serverStatus==='connected'){setIsExporting(true);setExportProgress(-1);showToast("Đang gửi yêu cầu nén định dạng lên máy chủ...","info");try{const file=new File([blob],`session_export.wav`,{type:'audio/wav'});const formData=new FormData();formData.append('file',file);const uploadResp=await fetch(`${API_AUDIO}/upload`,{method:'POST',body:formData});if(!uploadResp.ok)throw new Error("Upload to transcode server failed");const uploadData=await uploadResp.json();const fileId=uploadData.file_id;const exportResp=await fetch(`${API_AUDIO}/export`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({file_id:fileId,format:exportSettings.format,sample_rate:targetRate,bit_depth:bitDepth})});if(!exportResp.ok)throw new Error("Transcode request failed");const exportData=await exportResp.json();const result=await pollTaskResult(exportData.task_id,20);if(result.success){const outId=result.output_file_id;const downloadUrl=`${API_AUDIO}/download/${outId}`;showToast(`Xuất bản âm thanh định dạng ${exportSettings.format.toUpperCase()} thành công!`,"success","Tải về",async()=>{try{const br=await fetch(downloadUrl);if(!br.ok)throw new Error('HTTP '+br.status);const b=await br.blob();const sp=await saveExportViaDialog(`sonicforge-session-${targetRate}hz-${bitDepth}bit.${exportSettings.format}`,b);if(sp)showToast(`Đã lưu → ${sp}`,"success");}catch(e){const a=document.createElement('a');a.href=downloadUrl;a.download=`sonicforge-session-${targetRate}hz-${bitDepth}bit.${exportSettings.format}`;a.click();}});}else{throw new Error(result.error||'Server encoding failed');}}catch(transcodeErr){showToast(`Lỗi chuyển đổi: ${transcodeErr.message}.`,"warning","Tải WAV thay thế",()=>{downloadBlobViaServer(blob,wavName).catch(()=>{});});}}else{if(exportSettings.format!=='wav'){showToast("Đang ngoại tuyến. Tải về định dạng WAV thay thế.","warning");}const dres=await downloadBlobViaServer(blob,wavName).catch(()=>null);if(dres&&dres.saved_path){showToast(`Xuất bản âm thanh hoàn tất → ${dres.saved_path}`,"success");}else{showToast("Xuất bản âm thanh hoàn tất!","success");}}}finally{// Restore the LIVE master bus after offline render: initMasterBus(offlineCtx)
 // ghi đè cả `masterBus` lẫn `window.masterBus` bằng graph OfflineAudioContext
 // (state closed) → track route (window.masterBus.input) đổ vào context câm →
 // play/bounce sau export CÂM. Khôi phục bus live (giữ wiring cũ nếu còn sống,
diff --git a/app/templates/index.html b/app/templates/index.html
index c87723d..259ef95 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -51,7 +51,7 @@
     <script src="/static/js/services/promptTemplateManager.js?v=202607281039"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202607290941"></script>
     <script src="/static/js/services/chordTheory.js?v=202608211300"></script>
-    <script src="/static/js/app.precompiled.js?v=202608240010" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608240040" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {