diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index a4fc652..2cefd4f 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -14666,97 +14666,6 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
               </div>
             </div>
 
-            {/* WAVE OBSERVER INTEGRATION */}
-            <div className="border-t border-slate-800 bg-slate-900/60 p-3 flex flex-col shrink-0">
-              {/* Header */}
-              <div className="flex items-center justify-between pb-1.5 border-b border-slate-800/80 mb-2">
-                <div className="flex items-center gap-2">
-                  <span className="text-[11px] font-bold text-white uppercase tracking-wider">Wave Observer</span>
-                  <span className="text-[9px] bg-cyan-950 text-cyan-400 border border-cyan-800/60 px-1.5 py-0.2 rounded font-mono">Real-time Oscilloscope</span>
-                </div>
-                <div className="flex gap-2">
-                  <button onClick={() => setWoEnabled(!woEnabled)}
-                    className={`px-2 py-0.5 rounded text-[10px] font-bold border ${woEnabled ? 'bg-cyan-700 border-cyan-500 text-white' : 'bg-slate-800 border-slate-700 text-slate-300 hover:bg-slate-700'}`}>
-                    {woEnabled ? 'Scope: BẬT' : 'Scope: TẮT'}
-                  </button>
-                  {['Scope', 'Settings', 'Help', 'About'].map(tab => (
-                    <button key={tab} className={`px-2 py-0.5 rounded text-[10px] font-bold ${tab === 'Scope' ? 'bg-cyan-950 text-cyan-300 border border-cyan-800/60' : 'text-slate-400 hover:text-slate-200'}`}>
-                      {tab}
-                    </button>
-                  ))}
-                </div>
-              </div>
-
-              {/* Scope Canvas */}
-              <div className="relative w-full h-32 bg-[#090d16] border border-slate-800/80 rounded-lg overflow-hidden mb-2">
-                <canvas ref={woCanvasRef} className="w-full h-full block"></canvas>
-                {!woEnabled && (
-                  <div className="absolute inset-0 flex items-center justify-center text-[10px] font-mono text-slate-600 select-none pointer-events-none">
-                    Scope đang tắt — bấm [Scope: BẬT] để chạy
-                  </div>
-                )}
-              </div>
-
-              {/* Controls bar */}
-              <div className="flex items-center justify-between gap-4 text-[10px] oz-font-mono text-slate-400 mt-1 select-none">
-                {/* Input level meters */}
-                <div className="flex items-center gap-2 bg-slate-950 px-2.5 py-1.5 rounded border border-slate-800/80 shrink-0">
-                  <span className="text-[10px] font-bold text-slate-300">Input</span>
-                  <div className="flex flex-col gap-1 w-20">
-                    <div className="flex items-center gap-1">
-                      <span className="text-[8px] text-slate-500 w-2">L</span>
-                      <div className="w-16 h-1.5 bg-slate-900 rounded-sm overflow-hidden flex items-center">
-                        <div ref={woLeftMeterRef} className="h-full bg-cyan-400 transition-all duration-75" style={{ width: '0%' }}></div>
-                      </div>
-                    </div>
-                    <div className="flex items-center gap-1">
-                      <span className="text-[8px] text-slate-500 w-2">R</span>
-                      <div className="w-16 h-1.5 bg-slate-900 rounded-sm overflow-hidden flex items-center">
-                        <div ref={woRightMeterRef} className="h-full bg-teal-500 transition-all duration-75" style={{ width: '0%' }}></div>
-                      </div>
-                    </div>
-                  </div>
-                </div>
-
-                {/* Scope Controls */}
-                <div className="flex items-center gap-4 bg-slate-950 px-3 py-1 rounded border border-slate-800/80 flex-1 justify-around">
-                  <span className="font-bold text-slate-300 uppercase tracking-widest text-[9px]">Scope</span>
-                  
-                  <div className="flex items-center gap-1.5">
-                    <span>Channel</span>
-                    <select value={woChannel} onChange={e => setWoChannel(e.target.value)} className="bg-slate-900 border border-slate-700 rounded px-1.5 py-0.5 text-[9px] text-slate-300 outline-none">
-                      <option value="stereo">Stereo</option>
-                      <option value="left">Left Only</option>
-                      <option value="right">Right Only</option>
-                    </select>
-                  </div>
-
-                  <div className="flex items-center gap-1.5">
-                    <span>Mode</span>
-                    <select value={woMode} onChange={e => setWoMode(e.target.value)} className="bg-slate-900 border border-slate-700 rounded px-1.5 py-0.5 text-[9px] text-slate-300 outline-none">
-                      <option value="waveform">Waveform</option>
-                      <option value="envelope">Envelope</option>
-                    </select>
-                  </div>
-
-                  <div className="flex items-center gap-1.5">
-                    <span>Duration:</span>
-                    <span className="text-cyan-400 font-bold w-10 text-right">{woDuration.toFixed(3)}s</span>
-                    <input type="range" min="0.5" max="5.0" step="0.1" value={woDuration} onChange={e => setWoDuration(parseFloat(e.target.value))} className="w-16 h-1 cursor-pointer accent-cyan-400" />
-                  </div>
-
-                  <div className="flex items-center gap-1.5">
-                    <span>V.Zoom:</span>
-                    <span className="text-cyan-400 font-bold w-12 text-right">{woZoom.toFixed(1)} dB</span>
-                    <input type="range" min="-12" max="24" step="0.5" value={woZoom} onChange={e => setWoZoom(parseFloat(e.target.value))} className="w-16 h-1 cursor-pointer accent-cyan-400" />
-                  </div>
-                </div>
-
-                <button onClick={() => setWoPaused(!woPaused)} className={`px-3 py-1 rounded font-bold border transition shadow-md shrink-0 flex items-center gap-1 ${woPaused ? 'bg-amber-800 hover:bg-amber-700 border-amber-500 text-amber-100' : 'bg-slate-800 hover:bg-slate-700 border-slate-700 text-slate-200'}`}>
-                  {woPaused ? 'Resume' : 'Pause'}
-                </button>
-              </div>
-            </div>
           </div>
           )}
 
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 0170d8b..8778198 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -979,7 +979,7 @@ const MODULE_META={eq:{name:'Dynamic EQ',sub:'4-Band Peak',icon:'activity',color
 const EQ_PRESET_LIBRARY={flat:{name:'Flat / Reset',bands:[{id:1,type:'lowshelf',freq:100,gain:0.0,q:0.7},{id:2,type:'peaking',freq:800,gain:0.0,q:0.7},{id:3,type:'peaking',freq:3200,gain:0.0,q:1.2},{id:4,type:'highshelf',freq:10000,gain:0.0,q:0.7}]},vocal_clarity:{name:'Vocal Unmask & Clarity',bands:[{id:1,type:'lowshelf',freq:90,gain:-2.5,q:0.7},{id:2,type:'peaking',freq:500,gain:-1.8,q:1.0},{id:3,type:'peaking',freq:2800,gain:3.2,q:1.2},{id:4,type:'highshelf',freq:12000,gain:2.0,q:0.7}]},bass_punch:{name:'EDM Low-End Punch',bands:[{id:1,type:'lowshelf',freq:80,gain:4.0,q:0.8},{id:2,type:'peaking',freq:300,gain:-3.0,q:1.4},{id:3,type:'peaking',freq:4000,gain:1.5,q:1.0},{id:4,type:'highshelf',freq:10000,gain:1.0,q:0.7}]},warm_tape:{name:'Warm Vintage Analog',bands:[{id:1,type:'lowshelf',freq:120,gain:2.0,q:0.6},{id:2,type:'peaking',freq:1500,gain:1.0,q:0.5},{id:3,type:'peaking',freq:5000,gain:-2.0,q:1.0},{id:4,type:'highshelf',freq:8000,gain:-3.0,q:0.7}]}};const applyEQPreset=presetKey=>{const preset=EQ_PRESET_LIBRARY[presetKey];if(!preset)return;// Phase 4.5: EQ DSP chạy trong bridge — preset chỉ sync state; engine
 // nhận qua fxRtPushAllParams() ở applyMasteringSettings.
 // Sync UI knobs + canvas: [eqLowGain, eqMid1Gain, eqMid2Gain, eqHighGain]
-setOzState(prev=>({...prev,eqLowGain:preset.bands[0]?preset.bands[0].gain:prev.eqLowGain,eqMid1Gain:preset.bands[1]?preset.bands[1].gain:prev.eqMid1Gain,eqMid2Gain:preset.bands[2]?preset.bands[2].gain:prev.eqMid2Gain,eqHighGain:preset.bands[3]?preset.bands[3].gain:prev.eqHighGain,eqPreset:presetKey}));};const bandKnob=(param,min,max,val,unit,label,freq,color,filterType)=>/*#__PURE__*/React.createElement("div",{className:"bg-slate-900/80 border border-slate-800 p-2 flex flex-col justify-between items-center rounded-lg"},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between text-[10px] font-bold w-full",style:{color}},/*#__PURE__*/React.createElement("span",null,label),/*#__PURE__*/React.createElement("span",{className:"text-[9px] font-mono text-slate-400"},freq)),/*#__PURE__*/React.createElement("div",{className:"my-1"},/*#__PURE__*/React.createElement(MasteringKnob,{param:param,min:min,max:max,value:ozState[param]!==undefined?ozState[param]:val,unit:unit,color:color,onChange:(p,v)=>setOzState(prev=>({...prev,[p]:v}))})),/*#__PURE__*/React.createElement("div",{className:"text-[9px] text-slate-500 font-mono text-center mt-1"},filterType));return/*#__PURE__*/React.createElement("div",{className:"fixed inset-0 z-[100] flex items-center justify-center bg-black/70 backdrop-blur-sm",onClick:onClose},/*#__PURE__*/React.createElement("div",{id:"masteringModalBody",className:"flex flex-col bg-slate-950 text-slate-200 w-[95vw] h-[92vh] max-w-[1400px] rounded-2xl border border-slate-800/80 shadow-2xl overflow-hidden",onClick:e=>e.stopPropagation(),style:{fontFamily:"'Inter', sans-serif"}},/*#__PURE__*/React.createElement("header",{className:"h-12 bg-slate-900/90 border-b border-slate-800/80 flex items-center justify-between px-4 z-30 shrink-0"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3"},/*#__PURE__*/React.createElement("div",{className:"w-7 h-7 rounded-lg bg-cyan-600 flex items-center justify-center font-bold text-white shadow-lg shadow-cyan-950"},/*#__PURE__*/React.createElement("i",{"data-lucide":"zap",className:"w-3.5 h-3.5"})),/*#__PURE__*/React.createElement("div",null,/*#__PURE__*/React.createElement("h1",{className:"text-xs font-bold tracking-wider text-white flex items-center gap-2"},"MASTER FX CHAIN ",/*#__PURE__*/React.createElement("span",{className:"text-[9px] bg-cyan-950 text-cyan-400 border border-cyan-800/80 px-1.5 py-0.5 rounded oz-font-mono"},"WEB MASTERING V10.5")))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3 bg-slate-950 px-3 py-1 rounded-lg border border-slate-800/80"},/*#__PURE__*/React.createElement("button",{onClick:startAudioDemo,className:"px-3 py-1 bg-cyan-600 hover:bg-cyan-500 text-white rounded text-xs font-semibold flex items-center gap-1.5 transition-all shadow-md shadow-cyan-950"},/*#__PURE__*/React.createElement("i",{"data-lucide":"play",className:"w-3 h-3"})," ",/*#__PURE__*/React.createElement("span",null,"Play Reference")),/*#__PURE__*/React.createElement("button",{onClick:stopAudioDemo,className:"px-3 py-1 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs font-semibold flex items-center gap-1.5 transition-all"},/*#__PURE__*/React.createElement("i",{"data-lucide":"square",className:"w-3 h-3"})," ",/*#__PURE__*/React.createElement("span",null,"Stop")),/*#__PURE__*/React.createElement("div",{className:"h-4 w-[1px] bg-slate-800 mx-1"}),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2 text-xs oz-font-mono"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400 text-[11px]"},"Preset:"),/*#__PURE__*/React.createElement("select",{className:"bg-slate-900 border border-slate-700 rounded px-2 py-0.5 text-xs text-cyan-300 outline-none focus:border-cyan-500"},/*#__PURE__*/React.createElement("option",{value:"adaptive"},"Adaptive Dynamic Master"),/*#__PURE__*/React.createElement("option",{value:"edm_club"},"EDM / Club Punch Maximizer"),/*#__PURE__*/React.createElement("option",{value:"wide_space"},"Cinematic Stereo Expansion"),/*#__PURE__*/React.createElement("option",{value:"transparent"},"Transparent High-Clarity Limiter")))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3 text-xs oz-font-mono"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400 text-[11px]"},"Target LUFS:"),/*#__PURE__*/React.createElement("span",{className:"text-cyan-400 font-bold bg-slate-950 border border-cyan-900/60 px-2 py-0.5 rounded"},"-11.0 LUFS"),/*#__PURE__*/React.createElement("button",{onClick:()=>{getAudioContext();setMasterConnected(prev=>!prev);},className:`px-2 py-0.5 rounded text-[10px] font-bold border transition-colors ${masterConnected?'bg-emerald-700 border-emerald-500 text-white':'bg-slate-800 border-slate-700 text-slate-300 hover:bg-slate-700'}`},masterConnected?'Master ON':'Master OFF'),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"px-2 py-0.5 rounded text-[10px] font-bold border transition-colors bg-slate-800 border-slate-700 text-slate-300 hover:bg-[#c2410c] hover:border-red-600 hover:text-white"},"Đóng"),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"text-slate-500 hover:text-slate-300 ml-1"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-4 h-4"})))),/*#__PURE__*/React.createElement("div",{className:"h-16 bg-slate-950 border-b border-slate-800 px-4 flex items-center gap-2 overflow-x-auto shrink-0 oz-scrollbar"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-500 uppercase tracking-widest mr-1 oz-font-mono shrink-0"},"CHAIN:"),(ozState.chain||[]).map((mod,idx)=>{const isVst=mod.type==='vst3';const meta=MODULE_META[mod.type]||{name:mod.type,sub:'',icon:'circle',color:'#94a3b8'};const isEditing=!isVst&&ozState.activeModule===mod.type||isVst&&activeMasterVstPath===mod.path;const isOn=isVst?mod.active!==false:chainActive(mod.type);return/*#__PURE__*/React.createElement("div",{key:mod.id,draggable:true,onDragStart:e=>{dragChainIndexRef.current=idx;e.dataTransfer.effectAllowed='move';},onDragOver:e=>{e.preventDefault();e.dataTransfer.dropEffect='move';},onDrop:e=>{e.preventDefault();const from=dragChainIndexRef.current;if(from!==null&&from!==idx)reorderChain(from,idx);dragChainIndexRef.current=null;},onClick:()=>{if(mod.type==='vst3'){openMasterVstGui({path:mod.path,name:mod.name||mod.path});}else{closeMasterGui();switchModule(mod.type);}},className:`w-40 h-12 rounded-lg p-2 flex items-center justify-between cursor-pointer transition-all shrink-0 ${isEditing?'oz-card-active':'oz-card'}`},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2 min-w-0"},/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();toggleChainModule(mod.id);},className:"w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0",style:{backgroundColor:isOn?'#38bdf8':'#334155',color:isOn?'#0f172a':'#94a3b8'}},/*#__PURE__*/React.createElement("i",{"data-lucide":"power",className:"w-2.5 h-2.5"})),/*#__PURE__*/React.createElement("div",{className:"min-w-0"},/*#__PURE__*/React.createElement("div",{className:"text-[11px] font-bold text-slate-200 truncate"},isVst?mod.name||meta.name:meta.name),/*#__PURE__*/React.createElement("div",{className:"text-[9px] oz-font-mono truncate",style:{color:meta.color}},idx+1,". ",isVst?mod.path?mod.path.split(/[\\/]/).pop():'VST3':meta.sub))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1 shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":meta.icon,className:"w-3 h-3 text-slate-500"}),/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();removeChainModule(mod.id);},className:"text-slate-600 hover:text-red-400 text-xs w-4 h-4 flex items-center justify-center shrink-0",title:"Xóa module"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-3 h-3"}))));}),/*#__PURE__*/React.createElement("button",{onClick:()=>setAddModuleOpen(true),className:"w-24 h-12 rounded-lg border border-dashed border-slate-800 flex items-center justify-center text-slate-600 hover:text-slate-400 hover:border-slate-600 cursor-pointer transition-all shrink-0",title:"Thêm module vào chain"},/*#__PURE__*/React.createElement("i",{"data-lucide":"plus",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("div",{id:"fxrt-stats-ui",className:"h-6 bg-slate-950 border-b border-slate-800 px-4 flex items-center gap-3 text-[10px] oz-font-mono shrink-0"},/*#__PURE__*/React.createElement("span",{className:"text-slate-500 font-bold uppercase tracking-widest"},"FXRT"),fxRtStats?/*#__PURE__*/React.createElement("span",{className:fxRtStats.underruns>0||fxRtStats.silences>0?'text-red-400':'text-emerald-400'},"u=",fxRtStats.underruns," h=",fxRtStats.holds," f=",fxRtStats.fades," s=",fxRtStats.silences," q=",fxRtStats.queueLen," cap=",fxRtStats.capDrops," fadeIn=",fxRtStats.fadeIns):/*#__PURE__*/React.createElement("span",{className:"text-slate-600"},"off"),fxRtStats&&(fxRtStats.underruns>0||fxRtStats.silences>0)&&/*#__PURE__*/React.createElement("span",{className:"text-red-400"},"⚠ main-thread stall? Giảm tải UI / tăng FILL")),/*#__PURE__*/React.createElement("main",{className:"flex-1 flex overflow-hidden min-h-0"},masterGuiOpen?/*#__PURE__*/React.createElement("div",{className:"flex-1 flex flex-col bg-slate-950 relative min-h-0"},/*#__PURE__*/React.createElement(VstGuiEmbed,{url:masterGuiOpen.url,onClose:closeMasterGui,onDead:()=>{window.showToast&&window.showToast('Bridge VST GUI đã mất kết nối — trả về graph','error');closeMasterGui();}})):/*#__PURE__*/React.createElement("div",{className:"flex-1 flex flex-col bg-slate-950 relative overflow-y-auto oz-scrollbar"},/*#__PURE__*/React.createElement("div",{className:"h-9 bg-slate-900/60 border-b border-slate-800/80 px-4 flex items-center justify-between text-xs oz-font-mono shrink-0"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400 flex items-center gap-1.5"},/*#__PURE__*/React.createElement("i",{"data-lucide":"headphones",className:"w-3 h-3 text-cyan-400"})," Delta Listen"),/*#__PURE__*/React.createElement("select",{className:"bg-slate-950 border border-slate-800 rounded px-2 py-0.5 text-[11px] text-slate-300 outline-none"},/*#__PURE__*/React.createElement("option",{value:"irc4"},"IRC IV - Classic"),/*#__PURE__*/React.createElement("option",{value:"irc3"},"IRC III - Balanced"),/*#__PURE__*/React.createElement("option",{value:"irc2"},"IRC II - Crisp"))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2 text-[11px]"},ozState.activeModule==='eq'&&/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1.5"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400"},"EQ Presets:"),/*#__PURE__*/React.createElement("select",{value:ozState.eqPreset||'flat',onChange:e=>applyEQPreset(e.target.value),className:"bg-slate-950 border border-slate-700 text-cyan-300 rounded px-2 py-0.5 text-[11px] outline-none focus:border-cyan-500"},Object.keys(EQ_PRESET_LIBRARY).map(k=>/*#__PURE__*/React.createElement("option",{key:k,value:k},EQ_PRESET_LIBRARY[k].name)))),/*#__PURE__*/React.createElement("span",{className:"text-slate-400"},"Learn Input Gain:"),/*#__PURE__*/React.createElement("button",{className:"bg-cyan-950 text-cyan-300 border border-cyan-800/80 px-2 py-0.5 rounded font-bold hover:bg-cyan-900 transition-colors"},"-11.0 LUFS"))),/*#__PURE__*/React.createElement("div",{className:`flex-1 flex flex-col p-4 gap-4 ${ozState.activeModule==='eq'?'':'hidden'}`},/*#__PURE__*/React.createElement("div",{className:"relative w-full h-64 bg-slate-950 border border-slate-800/90 rounded-xl overflow-hidden shadow-inner cursor-crosshair"},/*#__PURE__*/React.createElement("canvas",{ref:eqCanvasRef,className:"w-full h-full block"})),/*#__PURE__*/React.createElement("div",{className:"oz-panel p-3 rounded-xl grid grid-cols-4 gap-3"},bandKnob('eqLowGain',-12,12,1.5,'dB','BAND 1 (LOW)','100 Hz','#22d3ee','Shelf 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oz-font-mono text-center leading-snug px-2"},"Low < LF",/*#__PURE__*/React.createElement("br",null),"Mid giữa 2 crossover",/*#__PURE__*/React.createElement("br",null),"High > HF · Release 250ms")),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"low_thr",min:-60,max:0,value:mb?.params?.low_thr??-24,unit:"dB",label:"LOW THRESHOLD",color:"#84cc16",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{low_thr:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"low_ratio",min:1,max:20,value:mb?.params?.low_ratio??3,unit:":1",label:"LOW RATIO",color:"#84cc16",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{low_ratio:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"low_makeup",min:0,max:12,value:mb?.params?.low_makeup??0,unit:"dB",label:"LOW MAKE-UP",color:"#84cc16",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{low_makeup:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"mid_thr",min:-60,max:0,value:mb?.params?.mid_thr??-24,unit:"dB",label:"MID THRESHOLD",color:"#65a30d",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{mid_thr:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"mid_ratio",min:1,max:20,value:mb?.params?.mid_ratio??3,unit:":1",label:"MID RATIO",color:"#65a30d",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{mid_ratio:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"mid_makeup",min:0,max:12,value:mb?.params?.mid_makeup??0,unit:"dB",label:"MID MAKE-UP",color:"#65a30d",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{mid_makeup:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"high_thr",min:-60,max:0,value:mb?.params?.high_thr??-24,unit:"dB",label:"HIGH THRESHOLD",color:"#4d7c0f",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{high_thr:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"high_ratio",min:1,max:20,value:mb?.params?.high_ratio??3,unit:":1",label:"HIGH RATIO",color:"#4d7c0f",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{high_ratio:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"high_makeup",min:0,max:12,value:mb?.params?.high_makeup??0,unit:"dB",label:"HIGH MAKE-UP",color:"#4d7c0f",onChange:(p,v)=>mb&&updateChainEntryParams(mb.id,{high_makeup:v})}))))),/*#__PURE__*/React.createElement("div",{className:`flex-1 flex flex-col p-4 gap-4 ${ozState.activeModule==='deesser'?'':'hidden'}`},/*#__PURE__*/React.createElement("div",{className:"oz-panel p-4 rounded-xl flex-1 grid grid-cols-12 gap-6 items-center"},/*#__PURE__*/React.createElement("div",{className:"col-span-4 flex flex-col items-center justify-center border-r border-slate-800 pr-4"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-orange-400 uppercase oz-font-mono mb-3"},"De-Esser"),/*#__PURE__*/React.createElement("div",{className:"text-[9px] text-slate-500 oz-font-mono text-center mb-2"},"Detect sibilance @freq · envelope release 150ms"),/*#__PURE__*/React.createElement("button",{onClick:()=>toggleChainModule(de?.id),className:`px-3 py-1 rounded text-[10px] font-bold border transition-colors mt-2 ${ozState.deessActive?'bg-orange-700 border-orange-500 text-white':'bg-slate-800 border-slate-700 text-slate-300'}`},ozState.deessActive?'ON':'OFF')),/*#__PURE__*/React.createElement("div",{className:"col-span-8 grid grid-cols-4 gap-4"},/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"threshold",min:-60,max:0,value:de?.params?.threshold??-30,unit:"dB",label:"THRESHOLD",color:"#fb923c",onChange:(p,v)=>de&&updateChainEntryParams(de.id,{threshold:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"ratio",min:0,max:100,value:de?.params?.ratio??40,unit:"%",label:"STRENGTH",color:"#fb923c",onChange:(p,v)=>de&&updateChainEntryParams(de.id,{ratio:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"freq",min:2000,max:12000,value:de?.params?.freq??6000,unit:"Hz",label:"FREQ",color:"#f97316",onChange:(p,v)=>de&&updateChainEntryParams(de.id,{freq:v})})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"makeup",min:0,max:12,value:de?.params?.makeup??0,unit:"dB",label:"MAKE-UP",color:"#f97316",onChange:(p,v)=>de&&updateChainEntryParams(de.id,{makeup:v})}))))),/*#__PURE__*/React.createElement("div",{className:`flex-1 flex flex-col p-4 gap-4 ${ozState.activeModule==='exciter'?'':'hidden'}`},/*#__PURE__*/React.createElement("div",{className:"oz-panel p-4 rounded-xl flex-1 grid grid-cols-12 gap-6 items-center"},/*#__PURE__*/React.createElement("div",{className:"col-span-4 flex flex-col items-center justify-center border-r border-slate-800 pr-4"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-purple-400 uppercase oz-font-mono mb-3"},"Harmonic Exciter"),/*#__PURE__*/React.createElement("button",{onClick:()=>toggleChainModule((ozState.chain||[]).find(m=>m.type==='exciter')?.id),className:`px-3 py-1 rounded text-[10px] font-bold border transition-colors mt-2 ${ozState.excActive?'bg-purple-700 border-purple-500 text-white':'bg-slate-800 border-slate-700 text-slate-300'}`},ozState.excActive?'ON':'OFF')),/*#__PURE__*/React.createElement("div",{className:"col-span-8 grid grid-cols-3 gap-4"},/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"excDrive",min:0,max:100,value:ozState.excDrive,unit:"%",label:"DRIVE / MIX",color:"#c084fc",onChange:(p,v)=>setOzState(prev=>({...prev,[p]:v}))})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-slate-500 oz-font-mono text-center leading-snug px-2"},"WaveShaper saturation",/*#__PURE__*/React.createElement("br",null),"High-pass 2kHz",/*#__PURE__*/React.createElement("br",null),"4× oversampled · wet/dry mix"))))),/*#__PURE__*/React.createElement("div",{className:`flex-1 flex flex-col p-4 gap-4 ${ozState.activeModule==='rebalance'?'':'hidden'}`},/*#__PURE__*/React.createElement("div",{className:"oz-panel p-4 rounded-xl flex-1 grid grid-cols-12 gap-6 items-center"},/*#__PURE__*/React.createElement("div",{className:"col-span-4 flex flex-col items-center justify-center border-r border-slate-800 pr-4"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-sky-400 uppercase oz-font-mono mb-3"},"Master Rebalance (M/S)"),/*#__PURE__*/React.createElement("button",{onClick:()=>toggleChainModule((ozState.chain||[]).find(m=>m.type==='rebalance')?.id),className:`px-3 py-1 rounded text-[10px] font-bold border transition-colors mt-2 ${ozState.rebalActive?'bg-sky-700 border-sky-500 text-white':'bg-slate-800 border-slate-700 text-slate-300'}`},ozState.rebalActive?'ON':'OFF')),/*#__PURE__*/React.createElement("div",{className:"col-span-8 grid grid-cols-3 gap-4"},/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"rebalMid",min:-12,max:12,value:ozState.rebalMid,unit:"dB",label:"MID GAIN",color:"#38bdf8",onChange:(p,v)=>setOzState(prev=>({...prev,[p]:v}))})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"rebalSide",min:-12,max:12,value:ozState.rebalSide,unit:"dB",label:"SIDE GAIN",color:"#22d3ee",onChange:(p,v)=>setOzState(prev=>({...prev,[p]:v}))})),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center justify-center h-full"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-slate-500 oz-font-mono text-center leading-snug px-2"},"ChannelSplitter + M/S gains",/*#__PURE__*/React.createElement("br",null),"Center (vocal/bass) vs Sides (stereo width)")))))),/*#__PURE__*/React.createElement("div",{className:"w-64 bg-slate-900 border-l border-slate-800/80 p-3 flex flex-col justify-between shadow-2xl oz-font-mono text-xs z-20 shrink-0"},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between border-b border-slate-800 pb-2 mb-2"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-white tracking-wider uppercase flex items-center gap-1.5"},/*#__PURE__*/React.createElement("i",{"data-lucide":"sliders",className:"w-3 h-3 text-cyan-400"})," I/O METERS"),/*#__PURE__*/React.createElement("span",{className:"text-[9px] bg-cyan-950 border border-cyan-800 text-cyan-300 px-1 py-0.5 rounded"},"TRUE PEAK")),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-2 gap-2 text-[10px] text-center mb-2"},/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 border border-slate-800/80 p-1.5 rounded"},/*#__PURE__*/React.createElement("div",{className:"text-slate-500 font-bold"},"IN PEAK"),/*#__PURE__*/React.createElement("div",{id:"inPeakText",className:"text-cyan-400 font-bold oz-font-mono"},"-inf dB")),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 border border-slate-800/80 p-1.5 rounded"},/*#__PURE__*/React.createElement("div",{className:"text-slate-500 font-bold"},"OUT PEAK"),/*#__PURE__*/React.createElement("div",{id:"outPeakText",className:"text-emerald-400 font-bold oz-font-mono"},"-inf dB"))),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-2 gap-2 text-[10px] text-center mb-2"},/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 border border-slate-800/80 p-1.5 rounded"},/*#__PURE__*/React.createElement("div",{className:"text-slate-500 font-bold"},"OUT RMS"),/*#__PURE__*/React.createElement("div",{id:"outRmsText",className:"text-sky-300 font-bold oz-font-mono"},"-inf")),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 border border-slate-800/80 p-1.5 rounded"},/*#__PURE__*/React.createElement("div",{className:"text-slate-500 font-bold"},"LOUDNESS"),/*#__PURE__*/React.createElement("div",{id:"lufsText",className:"text-fuchsia-300 font-bold oz-font-mono"},"--.-"))),/*#__PURE__*/React.createElement("div",{className:"flex-1 bg-slate-950 border border-slate-800/90 rounded-xl p-2 flex justify-around relative overflow-hidden my-1"},/*#__PURE__*/React.createElement("div",{className:"flex flex-col items-center h-full"},/*#__PURE__*/React.createElement("span",{className:"text-[9px] text-slate-500 mb-1"},"IN"),/*#__PURE__*/React.createElement("div",{className:"flex-1 w-5 bg-slate-900 border border-slate-800 rounded relative overflow-hidden flex items-end"},/*#__PURE__*/React.createElement("canvas",{ref:inMeterCanvasRef,className:"w-full h-full block"}))),/*#__PURE__*/React.createElement("div",{className:"flex flex-col items-center h-full"},/*#__PURE__*/React.createElement("span",{className:"text-[9px] text-slate-500 mb-1"},"OUT"),/*#__PURE__*/React.createElement("div",{className:"flex-1 w-6 bg-slate-900 border border-slate-800 rounded relative overflow-hidden flex items-end"},/*#__PURE__*/React.createElement("canvas",{ref:outMeterCanvasRef,className:"w-full h-full block"})))),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-2 gap-1.5 mt-2"},/*#__PURE__*/React.createElement("button",{onClick:()=>setOzState(prev=>({...prev,isBypassed:!prev.isBypassed})),className:`py-1.5 rounded text-[10px] font-bold border transition-colors ${ozState.isBypassed?'bg-cyan-600 border-cyan-500 text-white':'bg-slate-800 hover:bg-slate-700 text-slate-200 border-slate-700'}`},"Bypass"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-200 py-1.5 rounded text-[10px] font-bold border border-slate-700 transition-colors"},"Gain Match"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700"},"Codec"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700"},"Dither"))))),addModuleOpen&&/*#__PURE__*/React.createElement("div",{className:"fixed inset-0 z-[110] bg-black/80 backdrop-blur-sm flex items-center justify-center p-4",onClick:()=>setAddModuleOpen(false)},/*#__PURE__*/React.createElement("div",{className:"w-full max-w-lg bg-slate-900 border border-slate-700 rounded-2xl p-5 space-y-4 shadow-2xl max-h-[80vh] overflow-y-auto",onClick:e=>e.stopPropagation()},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between border-b border-slate-800 pb-3"},/*#__PURE__*/React.createElement("h3",{className:"text-xs font-bold text-white uppercase tracking-wider oz-font-mono"},"THÊM MODULE VÀO MASTER FX CHAIN"),/*#__PURE__*/React.createElement("button",{onClick:()=>setAddModuleOpen(false),className:"text-slate-400 hover:text-white"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-2 gap-3 text-xs"},[{t:'eqpro',c:'text-teal-400',i:'chart-area',d:'Parametric / Graphic EQ PRO — Pro-Q style, 8 bands, interactive canvas + spectrum.'},{t:'compressor',c:'text-amber-400',i:'compress',d:'Nén dynamic range, glue & punch cho master.'},{t:'limiter',c:'text-rose-400',i:'shield-half',d:'True-Peak ceiling (ratio 20:1, knee 0) chống clipping.'},{t:'exciter',c:'text-purple-400',i:'wand-2',d:'Saturation hài cho warmth và top-end brilliance.'},{t:'rebalance',c:'text-sky-400',i:'sliders-horizontal',d:'Cân bằng Mid/Side (Vocal/Bass vs stereo width).'},{t:'eq',c:'text-cyan-400',i:'activity',d:'EQ 4-band (lowshelf, 2× peaking, highshelf) + presets.'},{t:'imager',c:'text-fuchsia-400',i:'radio',d:'Stereo width 4-band M/S + vectorscope/correlation.'},{t:'maximizer',c:'text-emerald-400',i:'gauge',d:'Maximizer: boost, soft clip, upward comp, ceiling.'},{t:'multiband',c:'text-lime-400',i:'layers',d:'Compressor 3 băng tần low/mid/high với crossover LR4.'},{t:'deesser',c:'text-orange-400',i:'mic-2',d:'Giảm sibilance (âm xuýt) theo tần số phát hiện.'}].map(m=>/*#__PURE__*/React.createElement("button",{key:m.t,onClick:()=>addModuleToChain(m.t),className:"p-3 bg-slate-950 hover:bg-slate-800 border border-slate-800 rounded-xl text-left space-y-1 transition-colors"},/*#__PURE__*/React.createElement("div",{className:`font-bold ${m.c} flex items-center gap-1.5`},/*#__PURE__*/React.createElement("i",{"data-lucide":m.i,className:"w-3.5 h-3.5"})," ",MODULE_META[m.t].name),/*#__PURE__*/React.createElement("div",{className:"text-[10px] text-slate-400"},m.d)))),/*#__PURE__*/React.createElement("div",{className:"border-t border-slate-800 pt-3"},/*#__PURE__*/React.createElement("div",{className:"text-[10px] font-bold text-teal-400 uppercase tracking-wider oz-font-mono mb-2"},"VST FX (Ozone...)"),/*#__PURE__*/React.createElement("button",{onClick:()=>setMasterVstPickerOpen(true),className:"w-full bg-slate-950 hover:bg-slate-800 border border-dashed border-slate-700 hover:border-teal-600 text-teal-300 rounded px-2 py-2 text-[11px] text-left transition-colors",title:"Plugin Picker theo category (EQ / Reverb / Comp / Utility)"},/*#__PURE__*/React.createElement("i",{"data-lucide":"plug",className:"w-3 h-3 inline-block mr-1"})," Chọn VST FX từ thư viện — Picker: EQ / Reverb / Comp / Utility")))),/*#__PURE__*/React.createElement(VstPluginPicker,{open:masterVstPickerOpen,onClose:()=>setMasterVstPickerOpen(false),plugins:masterFxList,loading:masterFxLoading,onPick:f=>addVstToChain(f.path)}));};// ── Media Explorer Panel (from md/51_MEDIA_EXPLORER.md) ──
 const MEDIA_LIBRARY_SAMPLES=[{name:"MIDI_Loop_01.mid",events:95,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_02_Bass.mid",events:48,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_03_Lead.mid",events:110,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_04.mid",events:76,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_05_Bass.mid",events:52,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_06.mid",events:88,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"}];const MediaExplorerPanel=({height,clipboardRef,active})=>{const[userFiles,setUserFiles]=React.useState([]);const[folder,setFolder]=React.useState('library');const[selected,setSelected]=React.useState(null);const[filterText,setFilterText]=React.useState('');const[viewMode,setViewMode]=React.useState('details');const[isPlaying,setIsPlaying]=React.useState(false);const[isPaused,setIsPaused]=React.useState(false);const[isLooping,setIsLooping]=React.useState(false);const[autoPlay,setAutoPlay]=React.useState(true);const[pitch,setPitch]=React.useState(0.0);const[rate,setRate]=React.useState(1.0);const[volumeDb,setVolumeDb]=React.useState(0.0);const[currentTime,setCurrentTime]=React.useState(0);const[peaks,setPeaks]=React.useState(null);const[audioBuffer,setAudioBuffer]=React.useState(null);const[audioDuration,setAudioDuration]=React.useState(0);const[midiNotes,setMidiNotes]=React.useState(null);const[midiTotal,setMidiTotal]=React.useState(4);const[midiBars,setMidiBars]=React.useState(1);const[midiTotalBeats,setMidiTotalBeats]=React.useState(16);const[midiFileBpm,setMidiFileBpm]=React.useState(120);const[tempo,setTempo]=React.useState(function(){var saved=localStorage.getItem('studio_media_explorer_tempo');return saved?parseInt(saved):120;});const[tempoText,setTempoText]=React.useState(String(function(){var saved=localStorage.getItem('studio_media_explorer_tempo');return saved?parseInt(saved):120;}()));const[zoom,setZoom]=React.useState(1.0);// Đồng bộ zoom ra window ref — serializeProjectToSchema lưu vào metadata.zoom
 // (module-level không truy cập state) → restore/open khôi phục đúng zoom.
 React.useEffect(()=>{window.__currentZoom=zoom;},[zoom]);const[scrollOffset,setScrollOffset]=React.useState(0);const scrollOffsetRef=React.useRef(0);scrollOffsetRef.current=scrollOffset;const[selStart,setSelStart]=React.useState(null);const[selEnd,setSelEnd]=React.useState(null);const[isDragging,setIsDragging]=React.useState(false);const[previewCtxMenu,setPreviewCtxMenu]=React.useState(null);// { x, y }
diff --git a/app/templates/index.html b/app/templates/index.html
index 8d6deea..9b7974e 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=202608241730" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608241800" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {