diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index 2cefd4f..d06dc1e 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -11784,7 +11784,10 @@ const serializeProjectToSchema = (projectId, name, bpmVal, tracksList, subTabsLi
       time_signature_numerator: 4,
       time_signature_denominator: 4,
       sample_rate: 44100,
-      zoom: window.__sfTimelineZoom || window.__currentZoom || 1.0
+      zoom: window.__sfTimelineZoom || window.__currentZoom || 1.0,
+      loop_selection: !!window.__sfLoopSelection,
+      selection_start: (window.__sfLoopSelection && window.__sfSelectionStart != null) ? window.__sfSelectionStart : null,
+      selection_end: (window.__sfLoopSelection && window.__sfSelectionEnd != null) ? window.__sfSelectionEnd : null
     },
     main_session: {
       id: "main",
@@ -11969,7 +11972,10 @@ const deserializeProjectFromSchema = (schemaObj) => {
     masterMuted: !!(_masterBus.muted || _masterBus.mute),
     masterAutoVol: (_masterBus.automation && Array.isArray(_masterBus.automation.volume_db)) ? _masterBus.automation.volume_db.filter(p => p && typeof p.time === 'number' && typeof p.db === 'number') : [],
     masterAutoOn: !!(_masterBus.automation && Array.isArray(_masterBus.automation.volume_db) && _masterBus.automation.volume_db.length),
-    zoom: schemaObj.metadata && schemaObj.metadata.zoom ? parseFloat(schemaObj.metadata.zoom) : 1.0
+    zoom: schemaObj.metadata && schemaObj.metadata.zoom ? parseFloat(schemaObj.metadata.zoom) : 1.0,
+    loopSelection: !!(schemaObj.metadata && schemaObj.metadata.loop_selection),
+    selectionStart: (schemaObj.metadata && schemaObj.metadata.selection_start != null) ? schemaObj.metadata.selection_start : null,
+    selectionEnd: (schemaObj.metadata && schemaObj.metadata.selection_end != null) ? schemaObj.metadata.selection_end : null
   };
 };
 
@@ -12426,6 +12432,15 @@ const InteractiveEqPro = ({ track, params, onChange, getModule, applyTo, spectru
 
 const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExporting, onExport, onBounce, onRenderMastering }) => {
   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 (
     <div className="fixed inset-0 z-[300] bg-black/70 backdrop-blur-sm flex items-center justify-center p-6" onClick={onClose}>
       <div className="w-full max-w-2xl bg-slate-900 border border-slate-700 rounded-2xl shadow-2xl overflow-hidden" onClick={e => e.stopPropagation()}>
@@ -12436,6 +12451,38 @@ const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExpor
           <button onClick={onClose} className="text-zinc-400 hover:text-white"><i data-lucide="x" className="w-4 h-4" /></button>
         </div>
         <div className="p-4 max-h-[72vh] overflow-y-auto space-y-3">
+          <div className="bg-[#141414] border border-zinc-800 rounded px-2 py-1.5 space-y-1.5">
+            <div>
+              <label className="block text-[7px] text-zinc-500 font-bold uppercase mb-0.5">Tên file export</label>
+              <input type="text" value={exportSettings.fileName}
+                onChange={e => setExportSettings(p => ({ ...p, fileName: e.target.value }))}
+                placeholder="Để trống = dùng tên mặc định"
+                className="w-full bg-[#0d0d0d] border border-zinc-800 rounded px-1 py-0.5 text-xs text-zinc-300 focus:outline-none" />
+            </div>
+            <div className="flex items-end gap-2">
+              <div className="flex-1 min-w-0">
+                <label className="block text-[7px] text-zinc-500 font-bold uppercase mb-0.5">Thư mục export</label>
+                <div className="flex items-center gap-1.5 bg-[#0d0d0d] border border-zinc-800 rounded px-1.5 py-0.5 min-h-[22px]">
+                  <i className="fa-solid fa-folder text-cyan-400 text-[10px] shrink-0"></i>
+                  {exportSettings.exportDir ? (
+                    <a className="text-cyan-400 underline truncate cursor-pointer" title={exportSettings.exportDir} onClick={pickDir}>{exportSettings.exportDir}</a>
+                  ) : (
+                    <span className="text-zinc-600 truncate">Chưa chọn — xuất sẽ mở Save-As</span>
+                  )}
+                </div>
+              </div>
+              <button onClick={pickDir}
+                className="shrink-0 px-2 py-1 bg-cyan-700 hover:bg-cyan-600 text-white rounded text-[10px] font-bold flex items-center gap-1">
+                <i className="fa-solid fa-folder-open text-[10px]"></i> Chọn thư mục
+              </button>
+            </div>
+            <label className="flex items-center gap-1.5 cursor-pointer">
+              <input type="checkbox" checked={!!exportSettings.rememberExportDir}
+                onChange={e => setExportSettings(p => ({ ...p, rememberExportDir: e.target.checked }))}
+                className="accent-cyan-500 w-3.5 h-3.5" />
+              <span className="text-xs text-zinc-300">Lưu thư mục export làm mặc định</span>
+            </label>
+          </div>
           <div className="grid grid-cols-2 gap-2">
             <div>
               <label className="block text-[7px] text-zinc-500 font-bold uppercase mb-0.5">Nguồn</label>
@@ -12459,7 +12506,7 @@ const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExpor
             </div>
           </div>
           {exportSettings.format === 'wav' ? (
-            <div className="grid grid-cols-2 gap-2">
+            <div className="grid grid-cols-3 gap-2">
               <div>
                 <label className="block text-[7px] text-zinc-500 font-bold uppercase mb-0.5">SR (Hz)</label>
                 <select value={exportSettings.sampleRate} onChange={e => setExportSettings(p => ({ ...p, sampleRate: e.target.value }))}
@@ -12478,6 +12525,14 @@ const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExpor
                   <option value="float">32 float</option>
                 </select>
               </div>
+              <div>
+                <label className="block text-[7px] text-zinc-500 font-bold uppercase mb-0.5">Kênh</label>
+                <select value={exportSettings.channels} onChange={e => setExportSettings(p => ({ ...p, channels: 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">
+                  <option value="mono">Mono</option>
+                  <option value="stereo">Stereo</option>
+                </select>
+              </div>
             </div>
           ) : (
             <div className="grid grid-cols-2 gap-2">
@@ -12489,20 +12544,16 @@ const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExpor
                   <option value="lossless">Lossless</option>
                 </select>
               </div>
-              <div></div>
+              <div>
+                <label className="block text-[7px] text-zinc-500 font-bold uppercase mb-0.5">Kênh</label>
+                <select value={exportSettings.channels} onChange={e => setExportSettings(p => ({ ...p, channels: 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">
+                  <option value="mono">Mono</option>
+                  <option value="stereo">Stereo</option>
+                </select>
+              </div>
             </div>
           )}
-          <div className="grid grid-cols-2 gap-2">
-            <div>
-              <label className="block text-[7px] text-zinc-500 font-bold uppercase mb-0.5">Kênh</label>
-              <select value={exportSettings.channels} onChange={e => setExportSettings(p => ({ ...p, channels: 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">
-                <option value="mono">Mono</option>
-                <option value="stereo">Stereo</option>
-              </select>
-            </div>
-            <div></div>
-          </div>
           <div className="grid grid-cols-2 gap-2 bg-[#141414] border border-zinc-800 rounded px-2 py-1.5">
             <label className="flex items-center gap-1.5 cursor-pointer">
               <input type="checkbox" checked={!!exportSettings.dither}
@@ -17733,6 +17784,14 @@ const App = () => {
     // timeline thu nhỏ ở góc — user phải zoom in mới về đúng).
     window.__sfTimelineZoom = zoom;
   }, [zoom]);
+  // Persist transport loop selection qua save/reload — serialize đọc từ window
+  // refs (module-level không truy cập state). Lưu cả vùng chọn (giây) để loop
+  // vùng chọn hoạt động lại đúng sau khi mở project.
+  React.useEffect(() => { window.__sfLoopSelection = isLoopingSelection; }, [isLoopingSelection]);
+  React.useEffect(() => {
+    window.__sfSelectionStart = selectionStart;
+    window.__sfSelectionEnd = selectionEnd;
+  }, [selectionStart, selectionEnd]);
   const [isLoopingSelection, setIsLoopingSelection] = useState(false);
   const [beginBar, setBeginBar] = useState(0);
   const [endBar, setEndBar] = useState(0);
@@ -18321,24 +18380,44 @@ const App = () => {
   const aiPromptMgrRef = useRef(null);
   const aiTypeaheadRef = useRef(null);
   const [selectedProviderId, setSelectedProviderId] = useState('');
-  const [exportSettings, setExportSettings] = useState({
-    sampleRate: '44100',
-    bitDepth: 'float',
-    format: 'wav',
-    source: 'project',
-    quality: '44khz',
-    channels: 'stereo',
-    loop: false,
-    loopBars: 4,
-    dither: false,
-    normalize: true,
-    normalizeTarget: '-14lufs',
-    monoCheck: true,
-    // Gap 13: BWF/INFO metadata cho WAV mastering export
-    metaTitle: '',
-    metaArtist: '',
-    metaIsrc: ''
+  const [exportSettings, setExportSettings] = useState(() => {
+    let expDir = '', remExpDir = false;
+    try { expDir = localStorage.getItem('sonic_export_dir') || ''; } catch (e) { }
+    try { remExpDir = localStorage.getItem('sonic_remember_export_dir') === '1'; } catch (e) { }
+    return {
+      sampleRate: '44100',
+      bitDepth: 'float',
+      format: 'wav',
+      source: 'project',
+      quality: '44khz',
+      channels: 'stereo',
+      loop: false,
+      loopBars: 4,
+      dither: false,
+      normalize: true,
+      normalizeTarget: '-14lufs',
+      monoCheck: true,
+      // Gap 13: BWF/INFO metadata cho WAV mastering export
+      metaTitle: '',
+      metaArtist: '',
+      metaIsrc: '',
+      // Export file + thư mục (ExportModal) — dir lưu localStorage nếu remember
+      fileName: '',
+      exportDir: expDir,
+      rememberExportDir: remExpDir
+    };
   });
+  // Persist export dir mặc định (chỉ khi user bật remember) — ExportModal
+  useEffect(() => {
+    try {
+      if (exportSettings.rememberExportDir && exportSettings.exportDir) {
+        localStorage.setItem('sonic_export_dir', exportSettings.exportDir);
+      } else {
+        localStorage.removeItem('sonic_export_dir');
+      }
+      localStorage.setItem('sonic_remember_export_dir', exportSettings.rememberExportDir ? '1' : '0');
+    } catch (e) { }
+  }, [exportSettings.exportDir, exportSettings.rememberExportDir]);
   const [serverStatus, setServerStatus] = useState('checking...');
   const _lan = window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.lan;
   const serverAddr = _lan && _lan.urls && _lan.urls[0] ? (function () { try { return new URL(_lan.urls[0]).host; } catch (e) { return null; } })() : window.location.host;
@@ -19444,6 +19523,14 @@ const App = () => {
         // Bỏ qua zoom ≤ 1 (data cũ lưu 1.0 — lỗi __currentZoom của Media
         // Explorer) — áp dụng mới giữ zoom hiện tại/localStorage — hết thu nhỏ.
         if (result.zoom > 1 && setZoom) setZoom(result.zoom);
+        // Restore transport loop selection (loop vùng chọn sau save/reload)
+        if (result.loopSelection !== undefined && result.loopSelection) {
+          setIsLoopingSelection(true);
+          if (result.selectionStart != null && result.selectionEnd != null) {
+            setSelectionStart(result.selectionStart);
+            setSelectionEnd(result.selectionEnd);
+          }
+        }
         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);
@@ -19705,6 +19792,7 @@ const App = () => {
         if (p.showSelectionPanel !== undefined) setShowSelectionPanel(p.showSelectionPanel);
         if (p.showPythonToolsPanel !== undefined) setShowPythonToolsPanel(p.showPythonToolsPanel);
         if (p.showMediaExplorer !== undefined) setShowMediaExplorer(p.showMediaExplorer);
+        if (p.showMixer !== undefined) setShowMixer(p.showMixer);
         if (p.showFxRack !== undefined) setShowFxRack(p.showFxRack);
         if (p.showMidiEvents !== undefined) setShowMidiEvents(p.showMidiEvents);
         if (p.panelPositions) setPanelPositions(p.panelPositions);
@@ -27481,6 +27569,34 @@ const App = () => {
   // /api/v1/files/save-dialog (PowerShell hoặc Tauri bridge) → ghi bytes qua
   // /api/v1/files/write. Trả path đã ghi; null nếu user hủy / không có dialog.
   async function saveExportViaDialog(defaultName, blob) {
+    // Export dir đã chọn trong ExportModal → ghi thẳng file, không mở Save-As.
+    // fileName từ modal nếu user nhập (thêm đuôi theo defaultName nếu thiếu),
+    // ngược lại dùng tên mặc định của flow export.
+    const dir = (exportSettings.exportDir || '').trim();
+    if (dir) {
+      try {
+        const ext = defaultName.includes('.') ? defaultName.split('.').pop() : 'bin';
+        let fname = (exportSettings.fileName || '').trim();
+        if (fname) {
+          if (!fname.includes('.')) fname = fname + '.' + ext;
+          else if (!fname.toLowerCase().endsWith('.' + ext.toLowerCase())) fname = fname + '.' + ext;
+        } else {
+          fname = defaultName;
+        }
+        const path = dir.replace(/[\\/]+$/, '') + '\\' + fname;
+        const fd = new FormData();
+        fd.append('path', path);
+        fd.append('file', new File([blob], fname, { type: blob.type || 'application/octet-stream' }));
+        const wr = await fetch(`${API_BASE_URL}/api/v1/files/write`, { method: 'POST', body: fd });
+        if (wr.ok) {
+          const w = await wr.json();
+          return w.path;
+        }
+        return null;
+      } catch (e) {
+        return null;
+      }
+    }
     try {
       const dlg = await fetch(`${API_BASE_URL}/api/v1/files/save-dialog`, {
         method: 'POST',
@@ -30693,7 +30809,7 @@ STRICT CONSTRAINTS:
   const prefsRef = useRef({});
   prefsRef.current = {
     showAIPanel, showExportPanel, showSelectionPanel, showPythonToolsPanel,
-    showMediaExplorer, showFxRack, showMidiEvents,
+    showMediaExplorer, showMixer, showFxRack, showMidiEvents,
     panelPositions, rightSidebarWidth, mediaExplorerHeight, selectedProviderId
   };
   useEffect(() => {
@@ -30705,7 +30821,7 @@ STRICT CONSTRAINTS:
     }, 2000);
     return () => clearTimeout(timer);
   }, [showAIPanel, showExportPanel, showSelectionPanel, showPythonToolsPanel,
-    showMediaExplorer, showFxRack, showMidiEvents, panelPositions,
+    showMediaExplorer, showMixer, showFxRack, showMidiEvents, panelPositions,
     rightSidebarWidth, mediaExplorerHeight, selectedProviderId, currentUser]);
 
   const drawMixerVuMeter = (canvas, peak) => {
@@ -30929,6 +31045,14 @@ STRICT CONSTRAINTS:
             // Bỏ qua zoom ≤ 1 (data cũ lưu 1.0 — lỗi __currentZoom của Media
             // Explorer) — áp dụng mới giữ zoom hiện tại/localStorage.
             if (result.zoom > 1 && setZoom) setZoom(result.zoom);
+            // Restore transport loop selection (loop vùng chọn sau save/reload)
+            if (result.loopSelection !== undefined && result.loopSelection) {
+              setIsLoopingSelection(true);
+              if (result.selectionStart != null && result.selectionEnd != null) {
+                setSelectionStart(result.selectionStart);
+                setSelectionEnd(result.selectionEnd);
+              }
+            }
             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);
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 8778198..2908752 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -812,7 +812,7 @@ if(!s.sectionId)return;items.push({id:s.id,name:s.name||"Section Item",type:"SEC
 const visited=visitedSections||new Set();const curDepth=depth||0;if(curDepth>12)return[];return(schemaTracks||[]).map(t=>{const clips=[];const sections=[];const midiItems=[];(t.items||[]).forEach(item=>{if(item.type==="AUDIO_ITEM"){const src=item.source_data||{};const clipFileId=src.server_file_id||(src.audio_file_url?src.audio_file_url.split('/').pop():null)||null;clips.push({id:item.id,name:item.name,startTime:item.start_bar*secondsPerBar,speed:1.0,duration:item.duration_bars*secondsPerBar,serverFileId:clipFileId});}else if(item.type==="MIDI_ITEM"){const src=item.source_data||{};midiItems.push({id:item.id,name:item.name,parent_track_id:t.id,startTime:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,length_bars:item.duration_bars||4,notes:(src.notes||[]).map(n=>({id:n.id,pitch:n.pitch||60,start_beat:n.start_beat||0.0,duration_beats:n.duration_beats||1.0,velocity:n.velocity||0.8,pan:n.pan||0.0}))});}else if(item.type==="SECTION_ITEM"){const src=item.source_data||{};const secId=src.referenced_section_id;const secContainer=sectionStore?sectionStore[secId]:null;const isCycle=secContainer?visited.has(secId):false;sections.push({id:item.id,name:item.name,start:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,length_bars:item.duration_bars||4,sectionId:secId,tracks:secContainer&&!isCycle?deserializeTracksList(secContainer.tracks,secondsPerBar,sectionStore,new Set(visited).add(secId),curDepth+1):null});}});return{id:t.id,name:t.name,type:t.type==='MIDI'?'MIDI':t.type==='SECTION'?'SECTION':'audio',volumeDb:t.volume_db||0.0,pan:t.pan||0.0,muted:t.mute||false,solo:t.solo||false,masteringBypass:t.audio_bypass!==undefined?t.audio_bypass:t.mastering_bypass||false,audioBypass:t.audio_bypass!==undefined?t.audio_bypass:t.mastering_bypass||false,midiBypass:t.midi_bypass!==undefined?t.midi_bypass:t.mastering_bypass||false,fxActive:t.fx_active!==undefined?t.fx_active:true,color:t.color||(t.id==='1'?'#0f766e':'#1d4ed8'),startTime:t.start_time||0,height:t.height||140,markers:t.markers||[],serverFileId:t.server_file_id||t.items&&t.items.find(function(i){return i.type==='AUDIO_ITEM';})?.source_data?.server_file_id||t.items&&t.items.find(function(i){return i.type==='AUDIO_ITEM';})?.source_data?.audio_file_url?.split('/').pop()||null,channelInfo:t.channel_info||null,isArmed:t.is_armed||false,monitoringEnabled:t.monitoring_enabled!==false,inputSource:t.input_source?{deviceType:t.input_source.device_type||'NONE',deviceId:t.input_source.device_id||''}:{deviceType:'NONE',deviceId:''},midiChannel:t.midi_channel!=null?t.midi_channel:undefined,is_percussion:t.is_percussion||false,clips:clips,sections:sections,midiItems:midiItems,instrumentId:t.instrumentId!=null?t.instrumentId:t.instrument_id||null,instrumentProgram:t.instrumentProgram!==undefined&&t.instrumentProgram!==null?t.instrumentProgram:t.instrument_program!==null?t.instrument_program:undefined,instrumentName:t.instrument_name||null,instrument_source:t.instrument_source||null,soundfont_id:t.soundfont_id||null,soundfont_bank:t.soundfont_bank!==null?t.soundfont_bank:undefined,soundfont_program:t.soundfont_program!==null?t.soundfont_program:undefined,synth_engine:t.synth_engine||undefined,fxChain:(()=>{const parsed=(t.fx_chain||[]).map(m=>typeof m==='string'?{type:m,active:true}:{type:m.type||m,active:m.active!==false,...(m.params?{params:m.params}:{}),...(m.type==='vst3'?{path:m.path||'',name:m.name||'',preset_b64:m.preset_b64||'',bypass:!!m.bypass}:{})});const seen=new Set(parsed.filter(m=>m.type==='vst3').map(m=>m.path));(t.vst_fx_chain||[]).forEach(s=>{if(s&&s.path&&!seen.has(s.path)){parsed.push({type:'vst3',path:s.path||'',name:s.name||'',preset_b64:s.preset_b64||'',bypass:!!s.bypass,active:true});seen.add(s.path);}});return parsed;})(),vstFxChain:(()=>{const fromChain=(t.fx_chain||[]).filter(m=>m&&m.type==='vst3');const src=fromChain.length?fromChain:t.vst_fx_chain||[];return src.map(s=>({type:s.type||'vst3',path:s.path||'',name:s.name||'',preset_b64:s.preset_b64||'',bypass:!!s.bypass}));})(),vstFxBypass:t.vst_fx_bypass!==undefined?!!t.vst_fx_bypass:false,vstGuiOpenPath:t.vst_gui_open_path||null,vstGuiOpenName:t.vst_gui_open_name||null};});};const serializeProjectToSchema=(projectId,name,bpmVal,tracksList,subTabsList,sessionTabsList,masteringSettings,masterVolume,masterState)=>{const secondsPerBar=60.0/parseFloat(bpmVal||120)*4;const mainTracks=serializeTracksList(tracksList,secondsPerBar);const sectionStore={};// Helper: compute length_bars from tracks content
 const computeLengthBars=(tracksArr,spb)=>{let maxSec=0;(tracksArr||[]).forEach(tr=>{(tr.clips||[]).forEach(c=>{const end=(c.startTime||0)+(c.buffer?c.buffer.duration/(c.speed||1.0):4);if(end>maxSec)maxSec=end;});(tr.midiItems||[]).forEach(m=>{const end=(m.startTime||0)+(m.duration||4);if(end>maxSec)maxSec=end;});});return Math.ceil((maxSec||4)/spb);};// 1. Populate from sessionTabsList (open tabs)
 (sessionTabsList||[]).forEach(st=>{const serializedTracks=serializeTracksList(st.tracks,secondsPerBar);sectionStore[st.sectionId]={id:st.sectionId,name:st.name,is_root:false,length_bars:computeLengthBars(st.tracks,secondsPerBar),auto_compute_length:true,tracks:serializedTracks,color:st.color||null};});// 2. Also populate from tracksList (closed tabs saved inside Section items)
-const scanForSections=tracks=>{(tracks||[]).forEach(t=>{if(t.sections){t.sections.forEach(s=>{const secId=s.sectionId||s.id;if(s.tracks&&!sectionStore[secId]){sectionStore[secId]={id:secId,name:s.name,is_root:false,length_bars:computeLengthBars(s.tracks,secondsPerBar),auto_compute_length:true,tracks:serializeTracksList(s.tracks,secondsPerBar),color:s.color||null};}if(s.tracks){scanForSections(s.tracks);}});}});};scanForSections(tracksList);const subTabs=(subTabsList||[]).map(st=>{return{id:st.id,label:st.label,type:st.type,track_id:st.trackId,target_id:st.target_id,parent_tab_id:st.parent_tab_id,notes:st.notes||[],duration:st.duration||4,instrument_program:st.instrumentProgram,instrument_name:st.instrumentName,instrument_id:st.instrumentId||st.synth_engine&&st.synth_engine.plugin_id||null,synth_engine:st.synth_engine||null,current_time:st.currentTime||0,color:st.color||null};});return{project_id:projectId||'proj_'+Date.now(),metadata:{title:name||"Dự án mới",bpm:parseFloat(bpmVal||120),time_signature_numerator:4,time_signature_denominator:4,sample_rate:44100,zoom:window.__sfTimelineZoom||window.__currentZoom||1.0},main_session:{id:"main",name:"MAIN SESSION",is_root:true,length_bars:(()=>{let maxBar=16.0;(mainTracks||[]).forEach(t=>{(t.items||[]).forEach(item=>{const end=(item.start_bar||0)+(item.duration_bars||4);if(end>maxBar)maxBar=end;});});return maxBar;})(),auto_compute_length:true,tracks:mainTracks,...(masteringSettings&&Array.isArray(masteringSettings.vstFxChain)&&masteringSettings.vstFxChain.length>0||typeof masterVolume==='number'&&isFinite(masterVolume)&&masterVolume!==0||masterState&&(masterState.volL!==0||masterState.volR!==0||masterState.muted||!masterState.link)||Array.isArray(window.__masterAutoVol)&&window.__masterAutoVol.length>0?{master:{fx_chain:masteringSettings.vstFxChain.map(s=>({type:s.type||'vst3',path:s.path||'',name:s.name||'',preset_b64:_capturedPresetByPath[s.path]||s.preset_b64||'',bypass:!!s.bypass})),volume_db:typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0,volumeL_db:masterState&&typeof masterState.volL==='number'&&isFinite(masterState.volL)?masterState.volL:typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0,volumeR_db:masterState&&typeof masterState.volR==='number'&&isFinite(masterState.volR)?masterState.volR:typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0,link_lr:masterState?!!masterState.link:false,muted:masterState?!!masterState.muted:false,mute:masterState?!!masterState.muted:false,bypass:!masteringSettings.masterConnected||!!masteringSettings.vstBypass,...(Array.isArray(window.__masterAutoVol)&&window.__masterAutoVol.length>0?{automation:{volume_db:window.__masterAutoVol.map(p=>({time:p.time,db:p.db}))}}:{})}}:{})},sub_tabs:subTabs,section_store:sectionStore,mastering_settings:masteringSettings?{...masteringSettings,// FIX preset VST master mất sau save/load: GUI capture (_capturedPresetByPath)
+const scanForSections=tracks=>{(tracks||[]).forEach(t=>{if(t.sections){t.sections.forEach(s=>{const secId=s.sectionId||s.id;if(s.tracks&&!sectionStore[secId]){sectionStore[secId]={id:secId,name:s.name,is_root:false,length_bars:computeLengthBars(s.tracks,secondsPerBar),auto_compute_length:true,tracks:serializeTracksList(s.tracks,secondsPerBar),color:s.color||null};}if(s.tracks){scanForSections(s.tracks);}});}});};scanForSections(tracksList);const subTabs=(subTabsList||[]).map(st=>{return{id:st.id,label:st.label,type:st.type,track_id:st.trackId,target_id:st.target_id,parent_tab_id:st.parent_tab_id,notes:st.notes||[],duration:st.duration||4,instrument_program:st.instrumentProgram,instrument_name:st.instrumentName,instrument_id:st.instrumentId||st.synth_engine&&st.synth_engine.plugin_id||null,synth_engine:st.synth_engine||null,current_time:st.currentTime||0,color:st.color||null};});return{project_id:projectId||'proj_'+Date.now(),metadata:{title:name||"Dự án mới",bpm:parseFloat(bpmVal||120),time_signature_numerator:4,time_signature_denominator:4,sample_rate:44100,zoom:window.__sfTimelineZoom||window.__currentZoom||1.0,loop_selection:!!window.__sfLoopSelection,selection_start:window.__sfLoopSelection&&window.__sfSelectionStart!=null?window.__sfSelectionStart:null,selection_end:window.__sfLoopSelection&&window.__sfSelectionEnd!=null?window.__sfSelectionEnd:null},main_session:{id:"main",name:"MAIN SESSION",is_root:true,length_bars:(()=>{let maxBar=16.0;(mainTracks||[]).forEach(t=>{(t.items||[]).forEach(item=>{const end=(item.start_bar||0)+(item.duration_bars||4);if(end>maxBar)maxBar=end;});});return maxBar;})(),auto_compute_length:true,tracks:mainTracks,...(masteringSettings&&Array.isArray(masteringSettings.vstFxChain)&&masteringSettings.vstFxChain.length>0||typeof masterVolume==='number'&&isFinite(masterVolume)&&masterVolume!==0||masterState&&(masterState.volL!==0||masterState.volR!==0||masterState.muted||!masterState.link)||Array.isArray(window.__masterAutoVol)&&window.__masterAutoVol.length>0?{master:{fx_chain:masteringSettings.vstFxChain.map(s=>({type:s.type||'vst3',path:s.path||'',name:s.name||'',preset_b64:_capturedPresetByPath[s.path]||s.preset_b64||'',bypass:!!s.bypass})),volume_db:typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0,volumeL_db:masterState&&typeof masterState.volL==='number'&&isFinite(masterState.volL)?masterState.volL:typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0,volumeR_db:masterState&&typeof masterState.volR==='number'&&isFinite(masterState.volR)?masterState.volR:typeof masterVolume==='number'&&isFinite(masterVolume)?masterVolume:0,link_lr:masterState?!!masterState.link:false,muted:masterState?!!masterState.muted:false,mute:masterState?!!masterState.muted:false,bypass:!masteringSettings.masterConnected||!!masteringSettings.vstBypass,...(Array.isArray(window.__masterAutoVol)&&window.__masterAutoVol.length>0?{automation:{volume_db:window.__masterAutoVol.map(p=>({time:p.time,db:p.db}))}}:{})}}:{})},sub_tabs:subTabs,section_store:sectionStore,mastering_settings:masteringSettings?{...masteringSettings,// FIX preset VST master mất sau save/load: GUI capture (_capturedPresetByPath)
 // trước đây chỉ merge vào main_session.master.fx_chain, còn mastering_settings
 // (nguồn ưu tiên lúc deserialize) giữ preset cũ/rỗng → load lại mất settings.
 // Merge cả vstFxChain + chain (entry vst3) để 2 nơi lưu đồng nhất.
@@ -832,7 +832,7 @@ const _mergeVstSource=s=>{if(!s||!s.path)return;const ex=_masterVstSources.find(
 // → fxRtChain() filter bỏ VST3 + masterVstOn tắt → master FX không xử lý
 // realtime lẫn offline export sau khi load. Không có UI nào set vstBypass
 // cho master (chỉ có slot.bypass riêng) → luôn khôi phục false.
-vstBypass:false,gui_open_path:schemaObj.mastering_settings&&schemaObj.mastering_settings.gui_open_path?schemaObj.mastering_settings.gui_open_path:null,gui_open_name:schemaObj.mastering_settings&&schemaObj.mastering_settings.gui_open_name?schemaObj.mastering_settings.gui_open_name:null};})(),masterVolume:typeof _masterBus.volume_db==='number'&&isFinite(_masterBus.volume_db)?_masterBus.volume_db:0,masterVolL:typeof _masterBus.volumeL_db==='number'&&isFinite(_masterBus.volumeL_db)?_masterBus.volumeL_db:typeof _masterBus.volume_db==='number'&&isFinite(_masterBus.volume_db)?_masterBus.volume_db:0,masterVolR:typeof _masterBus.volumeR_db==='number'&&isFinite(_masterBus.volumeR_db)?_masterBus.volumeR_db:typeof _masterBus.volumeL_db==='number'&&isFinite(_masterBus.volumeL_db)?_masterBus.volumeL_db:typeof _masterBus.volume_db==='number'&&isFinite(_masterBus.volume_db)?_masterBus.volume_db:0,masterLink:!!_masterBus.link_lr,masterMuted:!!(_masterBus.muted||_masterBus.mute),masterAutoVol:_masterBus.automation&&Array.isArray(_masterBus.automation.volume_db)?_masterBus.automation.volume_db.filter(p=>p&&typeof p.time==='number'&&typeof p.db==='number'):[],masterAutoOn:!!(_masterBus.automation&&Array.isArray(_masterBus.automation.volume_db)&&_masterBus.automation.volume_db.length),zoom:schemaObj.metadata&&schemaObj.metadata.zoom?parseFloat(schemaObj.metadata.zoom):1.0};};// ──────────────────────────────────────────────
+vstBypass:false,gui_open_path:schemaObj.mastering_settings&&schemaObj.mastering_settings.gui_open_path?schemaObj.mastering_settings.gui_open_path:null,gui_open_name:schemaObj.mastering_settings&&schemaObj.mastering_settings.gui_open_name?schemaObj.mastering_settings.gui_open_name:null};})(),masterVolume:typeof _masterBus.volume_db==='number'&&isFinite(_masterBus.volume_db)?_masterBus.volume_db:0,masterVolL:typeof _masterBus.volumeL_db==='number'&&isFinite(_masterBus.volumeL_db)?_masterBus.volumeL_db:typeof _masterBus.volume_db==='number'&&isFinite(_masterBus.volume_db)?_masterBus.volume_db:0,masterVolR:typeof _masterBus.volumeR_db==='number'&&isFinite(_masterBus.volumeR_db)?_masterBus.volumeR_db:typeof _masterBus.volumeL_db==='number'&&isFinite(_masterBus.volumeL_db)?_masterBus.volumeL_db:typeof _masterBus.volume_db==='number'&&isFinite(_masterBus.volume_db)?_masterBus.volume_db:0,masterLink:!!_masterBus.link_lr,masterMuted:!!(_masterBus.muted||_masterBus.mute),masterAutoVol:_masterBus.automation&&Array.isArray(_masterBus.automation.volume_db)?_masterBus.automation.volume_db.filter(p=>p&&typeof p.time==='number'&&typeof p.db==='number'):[],masterAutoOn:!!(_masterBus.automation&&Array.isArray(_masterBus.automation.volume_db)&&_masterBus.automation.volume_db.length),zoom:schemaObj.metadata&&schemaObj.metadata.zoom?parseFloat(schemaObj.metadata.zoom):1.0,loopSelection:!!(schemaObj.metadata&&schemaObj.metadata.loop_selection),selectionStart:schemaObj.metadata&&schemaObj.metadata.selection_start!=null?schemaObj.metadata.selection_start:null,selectionEnd:schemaObj.metadata&&schemaObj.metadata.selection_end!=null?schemaObj.metadata.selection_end:null};};// ──────────────────────────────────────────────
 // MASTERING KNOB COMPONENT (Dynamic pointer events version)
 // ──────────────────────────────────────────────
 const MasteringKnob=({param,min,max,value,unit,label,color,onChange,size='small'})=>{const[isDragging,setIsDragging]=React.useState(false);const startYRef=React.useRef(0);const startValRef=React.useRef(0);const handlePointerDown=e=>{e.preventDefault();setIsDragging(true);startYRef.current=e.clientY;startValRef.current=value;e.currentTarget.setPointerCapture(e.pointerId);};const handlePointerMove=e=>{if(!isDragging)return;const deltaY=startYRef.current-e.clientY;let newVal=startValRef.current+deltaY/150*(max-min);newVal=Math.min(max,Math.max(min,newVal));onChange(param,newVal);};const handlePointerUp=e=>{setIsDragging(false);try{e.currentTarget.releasePointerCapture(e.pointerId);}catch(err){}};const pct=(value-min)/(max-min);const angle=-135+pct*270;const isLarge=size==='large';const dialClass=isLarge?'w-20 h-20 border-4 bg-slate-900':'w-10 h-10 border-2 bg-slate-800';const pointerHeight=isLarge?'h-6':'h-3';const valClass=isLarge?'text-xs text-cyan-300 font-bold mt-2 z-10':'text-[9px] text-slate-300 font-mono mt-1 font-bold';return/*#__PURE__*/React.createElement("div",{className:"flex flex-col items-center select-none"},label&&/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-400 mb-1.5 uppercase tracking-wide"},label),/*#__PURE__*/React.createElement("div",{className:`${dialClass} rounded-full relative flex items-center justify-center cursor-ns-resize shadow-lg`,style:{borderColor:color},onPointerDown:handlePointerDown,onPointerMove:handlePointerMove,onPointerUp:handlePointerUp,onPointerCancel:handlePointerUp},/*#__PURE__*/React.createElement("div",{className:"w-0.5 absolute rounded origin-bottom",style:{backgroundColor:color,height:isLarge?'22px':'12px',top:isLarge?'6px':'4px',transform:`rotate(${angle}deg)`,transformOrigin:'50% 100%'}}),isLarge&&/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-cyan-300 z-10 bg-slate-950/80 px-1 py-0.5 rounded border border-slate-800"},value>0&&unit==='dB'?'+':'',value.toFixed(1)," ",unit)),!isLarge&&/*#__PURE__*/React.createElement("span",{className:valClass},value>0&&unit==='dB'?'+':'',value.toFixed(1),unit));};// ──────────────────────────────────────────────
@@ -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 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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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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:"grid grid-cols-3 gap-2 pt-1"},/*#__PURE__*/React.createElement("button",{onClick:onBounce,disabled:isExporting,title:"Bounce realtime — file WAV đầy đủ MIDI + FX Rack + Mastering Chain (chạy lại project thật)",className:"w-full py-1 bg-fuchsia-800 hover:bg-fuchsia-700 text-zinc-100 font-bold rounded text-xs flex items-center justify-center gap-1"},/*#__PURE__*/React.createElement("i",{"data-lucide":"radio",className:"w-3 h-3"})," ",isExporting?'...':'Bounce MIDI'),/*#__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:onRenderMastering,disabled:isExporting,title:"Render qua engine Python + mastering chain (VST3 bridge) — bit-depth/SR/dither/normalize (-1dBTP|-14LUFS) + mono side/mid check, trả LUFS + dBTP",className:"w-full py-1 bg-amber-800 hover:bg-amber-700 text-zinc-100 font-bold rounded text-xs flex items-center justify-center gap-1"},/*#__PURE__*/React.createElement("i",{"data-lucide":"gauge",className:"w-3 h-3"})," ",isExporting?'...':'Mastering')))));};// --- 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;
@@ -1130,7 +1130,10 @@ const handleSectionItemDragStartRef=useRef(null);const[localSelectionTrackId,set
 try{const v=parseFloat(localStorage.getItem('sf_zoom'));if(isFinite(v)&&v>0)return v;}catch(e){}return 100;});React.useEffect(()=>{try{localStorage.setItem('sf_zoom',String(zoom));}catch(e){}// Zoom TIMELINE (App) — serialize project dùng cái này (window.__currentZoom
 // là zoom của Media Explorer — lưu nhầm làm project load ra zoom 1.0 →
 // timeline thu nhỏ ở góc — user phải zoom in mới về đúng).
-window.__sfTimelineZoom=zoom;},[zoom]);const[isLoopingSelection,setIsLoopingSelection]=useState(false);const[beginBar,setBeginBar]=useState(0);const[endBar,setEndBar]=useState(0);const[numberBar,setNumberBar]=useState(1);// Quét chọn (sweep — tempo track/timeline) → đồng bộ bars hiển thị dưới
+window.__sfTimelineZoom=zoom;},[zoom]);// Persist transport loop selection qua save/reload — serialize đọc từ window
+// refs (module-level không truy cập state). Lưu cả vùng chọn (giây) để loop
+// vùng chọn hoạt động lại đúng sau khi mở project.
+React.useEffect(()=>{window.__sfLoopSelection=isLoopingSelection;},[isLoopingSelection]);React.useEffect(()=>{window.__sfSelectionStart=selectionStart;window.__sfSelectionEnd=selectionEnd;},[selectionStart,selectionEnd]);const[isLoopingSelection,setIsLoopingSelection]=useState(false);const[beginBar,setBeginBar]=useState(0);const[endBar,setEndBar]=useState(0);const[numberBar,setNumberBar]=useState(1);// Quét chọn (sweep — tempo track/timeline) → đồng bộ bars hiển thị dưới
 // statusbar: beginBar = bar chứa selectionStart, endBar = bar chứa
 // selectionEnd, numberBar = số bar được chọn. Trước đây beginBar/endBar/
 // numberBar CHỈ đổi khi nhập tay input — quét không cập nhật → statusbar
@@ -1211,8 +1214,10 @@ const[masterMuted,setMasterMuted]=useState(false);// MUTE master
 const[masterAutoVol,setMasterAutoVol]=useState([]);// Gap 7: master volume automation [{time s, db}]
 const[masterAutoOn,setMasterAutoOn]=useState(false);// Gap 7: automation active
 React.useEffect(()=>{window.__masterAutoVol=masterAutoVol;window.__masterAutoOn=masterAutoOn;},[masterAutoVol,masterAutoOn]);React.useEffect(()=>{if(isPlaying&&typeof applyMasterAutomationSchedule==='function'){try{applyMasterAutomationSchedule(currentTimeRef.current||0);}catch(e){console.warn('[Auto] reschedule error:',e);}}},[masterAutoVol,masterAutoOn,isPlaying]);const[masterVU,setMasterVU]=useState(0);// 0-1
-const[masterMeterPeak,setMasterMeterPeak]=useState(0);const[rightSidebarWidth,setRightSidebarWidth]=useState(320);const[tcpWidth,setTcpWidth]=useState(320);const[mediaExplorerHeight,setMediaExplorerHeight]=useState(50);const[panelPositions,setPanelPositions]=useState({export:'bottom',ai:'right',python_tools:'bottom',selection:'bottom',media_explorer:'bottom',fx_rack:'bottom',midi_events:'bottom'});const[panelDropZone,setPanelDropZone]=useState(null);const[dragGhostPos,setDragGhostPos]=useState(null);const[dragGhostPanel,setDragGhostPanel]=useState(null);const panelDragRef=useRef(null);const trackVuRefs=useRef({});const workspaceRef=useRef(null);const colResizerRef=useRef(null);const rowResizerRef=useRef(null);const[aiConfig,setAiConfig]=useState({baseUrl:localStorage.getItem('ai_base_url')||`${API_BASE_URL}`,apiKey:localStorage.getItem('ai_api_key')||'',model:localStorage.getItem('ai_model')||'deepseek-chat'});const[aiProviders,setAiProviders]=useState([]);useEffect(()=>{(async()=>{try{const data=await window.SonicAPI.getAIConfigs();if(data&&data.providers){setAiProviders(data.providers);const active=data.providers.find(p=>p.is_active)||data.providers[0];if(active)setSelectedProviderId(active.id);}}catch(e){/* server may not have config endpoint */}})();},[]);const[analysisState,setAnalysisState]=useState({status:'Sẵn sàng. Chạy AI để phân tích nhịp.',data:null,isRunning:false});const[aiPrompt,setAiPrompt]=useState('');const[aiComposeMode,setAiComposeMode]=useState('SIMILAR_VARIATION');const[promptHistory,setPromptHistory]=useState([]);const[promptHistIdx,setPromptHistIdx]=useState(-1);const promptHistRef=useRef([]);const aiPromptUndoRef=useRef({stack:[],idx:-1,max:30});const aiPromptUndoPush=text=>{const u=aiPromptUndoRef.current;u.stack.push(text);if(u.stack.length>u.max)u.stack.shift();u.idx=u.stack.length-1;};const[aiProvider,setAiProvider]=useState('OpenAI');const[aiModel,setAiModel]=useState('GPT-4o');const[aiActionLog,setAiActionLog]=useState([]);const actionLogContainerRef=useRef(null);useEffect(()=>{if(actionLogContainerRef.current){actionLogContainerRef.current.scrollTop=actionLogContainerRef.current.scrollHeight;}},[aiActionLog]);const[aiProcessing,setAiProcessing]=useState(false);const[aiSuggestions,setAiSuggestions]=useState([]);const[showAiTypeahead,setShowAiTypeahead]=useState(false);const[showAISuggestions,setShowAISuggestions]=useState(true);const[showAIActionLog,setShowAIActionLog]=useState(false);const aiPromptMgrRef=useRef(null);const aiTypeaheadRef=useRef(null);const[selectedProviderId,setSelectedProviderId]=useState('');const[exportSettings,setExportSettings]=useState({sampleRate:'44100',bitDepth:'float',format:'wav',source:'project',quality:'44khz',channels:'stereo',loop:false,loopBars:4,dither:false,normalize:true,normalizeTarget:'-14lufs',monoCheck:true,// Gap 13: BWF/INFO metadata cho WAV mastering export
-metaTitle:'',metaArtist:'',metaIsrc:''});const[serverStatus,setServerStatus]=useState('checking...');const _lan=window.SonicRuntime&&window.SonicRuntime.capabilities&&window.SonicRuntime.capabilities.lan;const serverAddr=_lan&&_lan.urls&&_lan.urls[0]?function(){try{return new URL(_lan.urls[0]).host;}catch(e){return null;}}():window.location.host;const[menuOpen,setMenuOpen]=useState(null);const[selectedClipId,setSelectedClipId]=useState(null);// { trackId, clipId }
+const[masterMeterPeak,setMasterMeterPeak]=useState(0);const[rightSidebarWidth,setRightSidebarWidth]=useState(320);const[tcpWidth,setTcpWidth]=useState(320);const[mediaExplorerHeight,setMediaExplorerHeight]=useState(50);const[panelPositions,setPanelPositions]=useState({export:'bottom',ai:'right',python_tools:'bottom',selection:'bottom',media_explorer:'bottom',fx_rack:'bottom',midi_events:'bottom'});const[panelDropZone,setPanelDropZone]=useState(null);const[dragGhostPos,setDragGhostPos]=useState(null);const[dragGhostPanel,setDragGhostPanel]=useState(null);const panelDragRef=useRef(null);const trackVuRefs=useRef({});const workspaceRef=useRef(null);const colResizerRef=useRef(null);const rowResizerRef=useRef(null);const[aiConfig,setAiConfig]=useState({baseUrl:localStorage.getItem('ai_base_url')||`${API_BASE_URL}`,apiKey:localStorage.getItem('ai_api_key')||'',model:localStorage.getItem('ai_model')||'deepseek-chat'});const[aiProviders,setAiProviders]=useState([]);useEffect(()=>{(async()=>{try{const data=await window.SonicAPI.getAIConfigs();if(data&&data.providers){setAiProviders(data.providers);const active=data.providers.find(p=>p.is_active)||data.providers[0];if(active)setSelectedProviderId(active.id);}}catch(e){/* server may not have config endpoint */}})();},[]);const[analysisState,setAnalysisState]=useState({status:'Sẵn sàng. Chạy AI để phân tích nhịp.',data:null,isRunning:false});const[aiPrompt,setAiPrompt]=useState('');const[aiComposeMode,setAiComposeMode]=useState('SIMILAR_VARIATION');const[promptHistory,setPromptHistory]=useState([]);const[promptHistIdx,setPromptHistIdx]=useState(-1);const promptHistRef=useRef([]);const aiPromptUndoRef=useRef({stack:[],idx:-1,max:30});const aiPromptUndoPush=text=>{const u=aiPromptUndoRef.current;u.stack.push(text);if(u.stack.length>u.max)u.stack.shift();u.idx=u.stack.length-1;};const[aiProvider,setAiProvider]=useState('OpenAI');const[aiModel,setAiModel]=useState('GPT-4o');const[aiActionLog,setAiActionLog]=useState([]);const actionLogContainerRef=useRef(null);useEffect(()=>{if(actionLogContainerRef.current){actionLogContainerRef.current.scrollTop=actionLogContainerRef.current.scrollHeight;}},[aiActionLog]);const[aiProcessing,setAiProcessing]=useState(false);const[aiSuggestions,setAiSuggestions]=useState([]);const[showAiTypeahead,setShowAiTypeahead]=useState(false);const[showAISuggestions,setShowAISuggestions]=useState(true);const[showAIActionLog,setShowAIActionLog]=useState(false);const aiPromptMgrRef=useRef(null);const aiTypeaheadRef=useRef(null);const[selectedProviderId,setSelectedProviderId]=useState('');const[exportSettings,setExportSettings]=useState(()=>{let expDir='',remExpDir=false;try{expDir=localStorage.getItem('sonic_export_dir')||'';}catch(e){}try{remExpDir=localStorage.getItem('sonic_remember_export_dir')==='1';}catch(e){}return{sampleRate:'44100',bitDepth:'float',format:'wav',source:'project',quality:'44khz',channels:'stereo',loop:false,loopBars:4,dither:false,normalize:true,normalizeTarget:'-14lufs',monoCheck:true,// Gap 13: BWF/INFO metadata cho WAV mastering export
+metaTitle:'',metaArtist:'',metaIsrc:'',// Export file + thư mục (ExportModal) — dir lưu localStorage nếu remember
+fileName:'',exportDir:expDir,rememberExportDir:remExpDir};});// Persist export dir mặc định (chỉ khi user bật remember) — ExportModal
+useEffect(()=>{try{if(exportSettings.rememberExportDir&&exportSettings.exportDir){localStorage.setItem('sonic_export_dir',exportSettings.exportDir);}else{localStorage.removeItem('sonic_export_dir');}localStorage.setItem('sonic_remember_export_dir',exportSettings.rememberExportDir?'1':'0');}catch(e){}},[exportSettings.exportDir,exportSettings.rememberExportDir]);const[serverStatus,setServerStatus]=useState('checking...');const _lan=window.SonicRuntime&&window.SonicRuntime.capabilities&&window.SonicRuntime.capabilities.lan;const serverAddr=_lan&&_lan.urls&&_lan.urls[0]?function(){try{return new URL(_lan.urls[0]).host;}catch(e){return null;}}():window.location.host;const[menuOpen,setMenuOpen]=useState(null);const[selectedClipId,setSelectedClipId]=useState(null);// { trackId, clipId }
 const[stretchedClip,setStretchedClip]=useState(null);// { trackId, clipId, originalDuration, startTime, originalSpeed, beforeSnap }
 const[draggedSectionItem,setDraggedSectionItem]=useState(null);const[resizedSectionItem,setResizedSectionItem]=useState(null);const[editingTrackName,setEditingTrackName]=useState(null);// trackId being edited
 const[editingClipName,setEditingClipName]=useState(null);// { trackId, clipId }
@@ -1354,7 +1359,8 @@ var lastId=localStorage.getItem('sonic_project_id');var lastName=localStorage.ge
 const prof=currentUser||function(){try{return JSON.parse(localStorage.getItem('sonic_user')||'null');}catch(e){return null;}}();if(prof&&window.SonicAPI&&window.SonicAPI.listCloudProjects){try{const cloudList=await window.SonicAPI.listCloudProjects();if(cloudList&&cloudList.length>0){const latest=cloudList[0];// backend ORDER BY updated_at DESC
 lastId=latest.id;lastName=latest.name||lastName;const proj=await window.SonicAPI.getCloudProject(lastId);if(proj&&proj.data_json)parsed=JSON.parse(proj.data_json);}}catch(e){console.warn('restore cloud fallback error:',e);}}}else{try{if(lastId.startsWith('local_')){var localData=localStorage.getItem('sonic_local_project_data');if(localData)parsed=JSON.parse(localData);}else{var proj=await window.SonicAPI.getCloudProject(lastId);if(proj)parsed=JSON.parse(proj.data_json);}}catch(e){console.warn('restore load error:',e);}}try{if(!parsed)return false;var restoredBpm=bpm;var restoredTracks=[];var restoredSessionTabs=[];var restoredSubTabs=[];if(parsed.main_session){var result=deserializeProjectFromSchema(parsed);restoredTracks=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;// Bỏ qua zoom ≤ 1 (data cũ lưu 1.0 — lỗi __currentZoom của Media
 // Explorer) — áp dụng mới giữ zoom hiện tại/localStorage — hết thu nhỏ.
-if(result.zoom>1&&setZoom)setZoom(result.zoom);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{restoredTracks=(parsed.tracks||[]).map(function(t){var rest=Object.assign({},t);delete rest.height;return Object.assign({},rest,{buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null});});}setTracks(restoredTracks);loadAudioBuffersForTracks(restoredTracks).catch(function(err){console.warn('loadAudioBuffersForTracks error:',err);});trackMidiChannelsRef.current={};preloadTrackInstruments(restoredTracks).catch(function(err){console.warn('preloadTrackInstruments error:',err);});prerenderNativeTracks(restoredTracks,restoredBpm);setBpm(restoredBpm.toString());setSelectedTrackId(restoredTracks[0]?.id||'1');setProjectName(lastName);setCurrentProjectId(lastId);localStorage.setItem('sonic_project_id',lastId);setSessionTabs(restoredSessionTabs);setSubTabs(restoredSubTabs);// DIAG section-tab block: log tracks + sections của section tab sau restore
+if(result.zoom>1&&setZoom)setZoom(result.zoom);// Restore transport loop selection (loop vùng chọn sau save/reload)
+if(result.loopSelection!==undefined&&result.loopSelection){setIsLoopingSelection(true);if(result.selectionStart!=null&&result.selectionEnd!=null){setSelectionStart(result.selectionStart);setSelectionEnd(result.selectionEnd);}}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{restoredTracks=(parsed.tracks||[]).map(function(t){var rest=Object.assign({},t);delete rest.height;return Object.assign({},rest,{buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null});});}setTracks(restoredTracks);loadAudioBuffersForTracks(restoredTracks).catch(function(err){console.warn('loadAudioBuffersForTracks error:',err);});trackMidiChannelsRef.current={};preloadTrackInstruments(restoredTracks).catch(function(err){console.warn('preloadTrackInstruments error:',err);});prerenderNativeTracks(restoredTracks,restoredBpm);setBpm(restoredBpm.toString());setSelectedTrackId(restoredTracks[0]?.id||'1');setProjectName(lastName);setCurrentProjectId(lastId);localStorage.setItem('sonic_project_id',lastId);setSessionTabs(restoredSessionTabs);setSubTabs(restoredSubTabs);// DIAG section-tab block: log tracks + sections của section tab sau restore
 try{(restoredSessionTabs||[]).forEach(function(st){var secCount=0,midiCount=0,clipCount=0;(st.tracks||[]).forEach(function(tr){secCount+=(tr.sections||[]).length;midiCount+=(tr.midiItems||[]).length;clipCount+=(tr.clips||[]).length;});console.log('[Restore] sessionTab',st.id,'sectionId',st.sectionId,'tracks',(st.tracks||[]).length,'sections',secCount,'midi',midiCount,'clips',clipCount);});}catch(e){}var restoredItemCount=0;restoredTracks.forEach(function(rt){if(rt.clips)restoredItemCount+=rt.clips.length;if(rt.midiItems)restoredItemCount+=rt.midiItems.length;if(rt.sections)restoredItemCount+=rt.sections.length;});showToast('Đã khôi phục dự án "'+lastName+'" ('+restoredItemCount+' items).','info');return true;}catch(e){console.warn('restoreLastSessionProject failed:',e);// Stale session id (project deleted / DB reset): clear it so the error
 // does not repeat on every page load.
 localStorage.removeItem('sonic_project_id');localStorage.removeItem('sonic_project_name');return false;}};// Khoi phuc du an dang lam do tu temp autosave, CHI khi chua co project nao
@@ -1362,7 +1368,7 @@ localStorage.removeItem('sonic_project_id');localStorage.removeItem('sonic_proje
 // modal (handleAuthSuccess) lan luong auto-login (checkAuthStatus).
 const restoreTempProjectIfFresh=async()=>{try{const tmp=await window.SonicAPI.getTempProject();if(tmp&&tmp.has_temp&&tmp.data_json){let proj=tmp.data_json;if(typeof proj==='string'){try{proj=JSON.parse(proj);}catch(e){proj=null;}}if(proj&&proj.main_session){const freshStart=!(tracks&&tracks.some(t=>t.clips&&t.clips.length>0||t.midiItems&&t.midiItems.length>0||t.buffer));if(freshStart){const result=deserializeProjectFromSchema(proj);if(result&&result.tracks&&result.tracks.length>0){setTracks(result.tracks);loadAudioBuffersForTracks(result.tracks);setBpm((result.bpm||120).toString());if(result.sessionTabs&&result.sessionTabs.length>0)setSessionTabs(result.sessionTabs);if(result.subTabs&&result.subTabs.length>0)setSubTabs(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);const tmpName=proj.metadata&&proj.metadata.title||'Dự án tạm';setProjectName(tmpName);localStorage.setItem('sonic_project_name',tmpName);showToast('Đã khôi phục dự án đang làm dở từ bản lưu tạm','success');}}}}}catch(e){console.warn('[TempRestore] error:',e);}};useEffect(()=>{const checkAuthStatus=async()=>{const savedToken=localStorage.getItem('sonic_token');if(!savedToken){// Standalone (loopback): auto-login không cần mật khẩu. LAN client:
 // /auth/local trả 403 → hiện modal đăng nhập như cũ.
-try{const res=await window.SonicAPI.localLogin();if(res&&res.access_token){localStorage.setItem('sonic_token',res.access_token);localStorage.setItem('sonic_user',JSON.stringify(res.user));setCurrentUser(res.user);setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();return;}}catch(e){}setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);return;}try{const profile=await window.SonicAPI.getProfile();setCurrentUser(profile);localStorage.setItem('sonic_user',JSON.stringify(profile));if(profile.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();}}catch(err){const cached=localStorage.getItem('sonic_user');if(cached){try{setCurrentUser(JSON.parse(cached));}catch(_){}setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();}else{localStorage.removeItem('sonic_token');localStorage.removeItem('sonic_user');setCurrentUser(null);setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);}}};checkAuthStatus();},[]);const loadPendingSfsProject=()=>{const proj=window.__pendingSfsProject;if(!proj)return;try{let restoredTracks=[];let restoredBpm=bpm;let restoredSessionTabs=[];let restoredSubTabs=[];if(proj.main_session){const result=deserializeProjectFromSchema(proj);restoredTracks=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;if(result.masteringSettings){setMasteringSettings(result.masteringSettings);}else{setMasteringSettings({masterConnected:false,activeModule:null,eqActive:false,imagerActive:false,maximizerActive:false,eqLowGain:1.5,eqMid1Gain:-1.0,eqMid2Gain:2.0,eqHighGain:1.8,w1:0,w2:115,w3:135,w4:150,imagerScale:'v2',maxGain:5.4,maxUpward:2.0,maxSoftClip:15,maxTransient:25,ceiling:-0.1,isBypassed:false,chain:[],compActive:false,compThreshold:-16,compRatio:3,compMakeup:0,limActive:false,limThreshold:-1.0,limMode:0,limLookahead:2,excActive:false,excDrive:40,rebalActive:false,rebalMid:0,rebalSide:0});}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{restoredTracks=(proj.tracks||[]).map(t=>{const{height:_h,...rest}=t;return{...rest,buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null};});}if(restoredTracks.length>0){setTracks(restoredTracks);setBpm(restoredBpm.toString());prerenderNativeTracks(restoredTracks,restoredBpm);if(restoredSessionTabs.length>0){setSessionTabs(restoredSessionTabs);}if(restoredSubTabs.length>0){setSubTabs(restoredSubTabs);}showToast(`Đã tải dự án "${proj.metadata?.title||proj.name||'Dự án mới'}" từ liên kết .sfs thành công!`,"success");}}catch(e){showToast("Lỗi tải dự án từ .sfs","error");}finally{window.__pendingSfsProject=null;}};const handleAuthSuccess=user=>{setCurrentUser(user);if(user.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();const loadPrefs=p=>{if(!p)return;if(p.showAIPanel!==undefined)setShowAIPanel(p.showAIPanel);if(p.showExportPanel!==undefined)setShowExportPanel(p.showExportPanel);if(p.showSelectionPanel!==undefined)setShowSelectionPanel(p.showSelectionPanel);if(p.showPythonToolsPanel!==undefined)setShowPythonToolsPanel(p.showPythonToolsPanel);if(p.showMediaExplorer!==undefined)setShowMediaExplorer(p.showMediaExplorer);if(p.showFxRack!==undefined)setShowFxRack(p.showFxRack);if(p.showMidiEvents!==undefined)setShowMidiEvents(p.showMidiEvents);if(p.panelPositions)setPanelPositions(p.panelPositions);if(p.rightSidebarWidth)setRightSidebarWidth(p.rightSidebarWidth);if(p.mediaExplorerHeight)setMediaExplorerHeight(p.mediaExplorerHeight);if(p.selectedProviderId)setSelectedProviderId(p.selectedProviderId);};(async()=>{try{const data=await window.SonicAPI.getPreferences();if(data&&data.preferences)loadPrefs(data.preferences);else{const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}}catch(e){const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}try{const data=await window.SonicAPI.getAIConfigs();if(data&&data.providers){setAiProviders(data.providers);const active=data.providers.find(p=>p.is_active)||data.providers[0];if(active)setSelectedProviderId(active.id);}}catch(e){}try{window.SonicAPI.getSoundfontCatalog().then(cat=>{window.__soundfontCatalog=cat;}).catch(()=>{});}catch(e){}// Re-fetch instrument data after auth (useEffect on mount runs before token is set)
+try{const res=await window.SonicAPI.localLogin();if(res&&res.access_token){localStorage.setItem('sonic_token',res.access_token);localStorage.setItem('sonic_user',JSON.stringify(res.user));setCurrentUser(res.user);setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();return;}}catch(e){}setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);return;}try{const profile=await window.SonicAPI.getProfile();setCurrentUser(profile);localStorage.setItem('sonic_user',JSON.stringify(profile));if(profile.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();}}catch(err){const cached=localStorage.getItem('sonic_user');if(cached){try{setCurrentUser(JSON.parse(cached));}catch(_){}setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();}else{localStorage.removeItem('sonic_token');localStorage.removeItem('sonic_user');setCurrentUser(null);setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);}}};checkAuthStatus();},[]);const loadPendingSfsProject=()=>{const proj=window.__pendingSfsProject;if(!proj)return;try{let restoredTracks=[];let restoredBpm=bpm;let restoredSessionTabs=[];let restoredSubTabs=[];if(proj.main_session){const result=deserializeProjectFromSchema(proj);restoredTracks=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;if(result.masteringSettings){setMasteringSettings(result.masteringSettings);}else{setMasteringSettings({masterConnected:false,activeModule:null,eqActive:false,imagerActive:false,maximizerActive:false,eqLowGain:1.5,eqMid1Gain:-1.0,eqMid2Gain:2.0,eqHighGain:1.8,w1:0,w2:115,w3:135,w4:150,imagerScale:'v2',maxGain:5.4,maxUpward:2.0,maxSoftClip:15,maxTransient:25,ceiling:-0.1,isBypassed:false,chain:[],compActive:false,compThreshold:-16,compRatio:3,compMakeup:0,limActive:false,limThreshold:-1.0,limMode:0,limLookahead:2,excActive:false,excDrive:40,rebalActive:false,rebalMid:0,rebalSide:0});}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{restoredTracks=(proj.tracks||[]).map(t=>{const{height:_h,...rest}=t;return{...rest,buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null};});}if(restoredTracks.length>0){setTracks(restoredTracks);setBpm(restoredBpm.toString());prerenderNativeTracks(restoredTracks,restoredBpm);if(restoredSessionTabs.length>0){setSessionTabs(restoredSessionTabs);}if(restoredSubTabs.length>0){setSubTabs(restoredSubTabs);}showToast(`Đã tải dự án "${proj.metadata?.title||proj.name||'Dự án mới'}" từ liên kết .sfs thành công!`,"success");}}catch(e){showToast("Lỗi tải dự án từ .sfs","error");}finally{window.__pendingSfsProject=null;}};const handleAuthSuccess=user=>{setCurrentUser(user);if(user.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);(async()=>{const restored=await restoreLastSessionProject();if(!restored)await restoreTempProjectIfFresh();})();const loadPrefs=p=>{if(!p)return;if(p.showAIPanel!==undefined)setShowAIPanel(p.showAIPanel);if(p.showExportPanel!==undefined)setShowExportPanel(p.showExportPanel);if(p.showSelectionPanel!==undefined)setShowSelectionPanel(p.showSelectionPanel);if(p.showPythonToolsPanel!==undefined)setShowPythonToolsPanel(p.showPythonToolsPanel);if(p.showMediaExplorer!==undefined)setShowMediaExplorer(p.showMediaExplorer);if(p.showMixer!==undefined)setShowMixer(p.showMixer);if(p.showFxRack!==undefined)setShowFxRack(p.showFxRack);if(p.showMidiEvents!==undefined)setShowMidiEvents(p.showMidiEvents);if(p.panelPositions)setPanelPositions(p.panelPositions);if(p.rightSidebarWidth)setRightSidebarWidth(p.rightSidebarWidth);if(p.mediaExplorerHeight)setMediaExplorerHeight(p.mediaExplorerHeight);if(p.selectedProviderId)setSelectedProviderId(p.selectedProviderId);};(async()=>{try{const data=await window.SonicAPI.getPreferences();if(data&&data.preferences)loadPrefs(data.preferences);else{const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}}catch(e){const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}try{const data=await window.SonicAPI.getAIConfigs();if(data&&data.providers){setAiProviders(data.providers);const active=data.providers.find(p=>p.is_active)||data.providers[0];if(active)setSelectedProviderId(active.id);}}catch(e){}try{window.SonicAPI.getSoundfontCatalog().then(cat=>{window.__soundfontCatalog=cat;}).catch(()=>{});}catch(e){}// Re-fetch instrument data after auth (useEffect on mount runs before token is set)
 try{window.SonicAPI.listPlugins().then(async data=>{try{const catResp=(await window.SonicAPI.getSoundfontCatalog?.())??(await fetch('/api/v1/plugins/soundfonts/catalog').then(r=>r.json()));const catalog=catResp.full_catalog||{};data.soundfonts=(data.soundfonts||[]).map(sf=>{const sfId=sf.id.replace('sf_','');const catEntry=catalog[sfId.toLowerCase()]||catalog[sfId];if(catEntry&&catEntry.instruments)return{...sf,presets:catEntry.instruments};return sf;});}catch(e){console.warn('Catalog fetch error:',e);}setInstrumentSelectorData(data);}).catch(()=>{});}catch(e){}})();}};const handleLogout=()=>{localStorage.removeItem('sonic_token');localStorage.removeItem('sonic_user');setCurrentUser(null);setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);};// ── Temp project auto-save (local + server) ──
 useEffect(()=>{const serializeSafe=arr=>(arr||[]).map(t=>({id:t.id,name:t.name,startTime:t.startTime,height:t.height,volumeDb:t.volumeDb,pan:t.pan,muted:t.muted,solo:t.solo,color:t.color,markers:t.markers||[],serverFileId:t.serverFileId||null,channelInfo:t.channelInfo?{channels:t.channelInfo.channels,isStereo:t.channelInfo.isStereo,label:t.channelInfo.label}:null}));window.SonicStorage.scheduleTempAutoSave(()=>{return serializeProjectToSchema(currentProjectId||'temp_project',projectName||'Dự án tạm chưa lưu',bpm,tracks,subTabs,sessionTabs,masteringSettings,masterVolume,{volL:masterVolL,volR:masterVolR,link:masterLink,muted:masterMuted});});},[tracks,subTabs,sessionTabs,masteringSettings,masterVolume]);// ── Temp autosave SERVER khi tắt ứng dụng (Bug: đóng app mất dự án làm dở) ──
 // Lưu temp vào thư mục temp của ứng dụng (storage/temp + DB) khi:
@@ -2078,7 +2084,10 @@ const updateActiveTracksRef=useCallback(updater=>{const currentSessionTabs=sessi
 // WebView2 chặn anchor-download → engine mở SaveFileDialog qua
 // /api/v1/files/save-dialog (PowerShell hoặc Tauri bridge) → ghi bytes qua
 // /api/v1/files/write. Trả path đã ghi; null nếu user hủy / không có dialog.
-async function saveExportViaDialog(defaultName,blob){try{const dlg=await fetch(`${API_BASE_URL}/api/v1/files/save-dialog`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({default_name:defaultName,filter_name:defaultName.toLowerCase().endsWith('.mid')?'MIDI':'Audio',filter_ext:defaultName.split('.').pop()||'bin'})});if(!dlg.ok)return null;const d=await dlg.json();if(!d.path)return null;const fd=new FormData();fd.append('path',d.path);fd.append('file',new File([blob],defaultName,{type:blob.type||'application/octet-stream'}));const wr=await fetch(`${API_BASE_URL}/api/v1/files/write`,{method:'POST',body:fd});if(!wr.ok)return null;const w=await wr.json();return w.path;}catch(e){return null;}}// ── MIDI Export: tạo file MIDI từ tất cả tracks ──
+async function saveExportViaDialog(defaultName,blob){// Export dir đã chọn trong ExportModal → ghi thẳng file, không mở Save-As.
+// fileName từ modal nếu user nhập (thêm đuôi theo defaultName nếu thiếu),
+// ngược lại dùng tên mặc định của flow export.
+const dir=(exportSettings.exportDir||'').trim();if(dir){try{const ext=defaultName.includes('.')?defaultName.split('.').pop():'bin';let fname=(exportSettings.fileName||'').trim();if(fname){if(!fname.includes('.'))fname=fname+'.'+ext;else if(!fname.toLowerCase().endsWith('.'+ext.toLowerCase()))fname=fname+'.'+ext;}else{fname=defaultName;}const path=dir.replace(/[\\/]+$/,'')+'\\'+fname;const fd=new FormData();fd.append('path',path);fd.append('file',new File([blob],fname,{type:blob.type||'application/octet-stream'}));const wr=await fetch(`${API_BASE_URL}/api/v1/files/write`,{method:'POST',body:fd});if(wr.ok){const w=await wr.json();return w.path;}return null;}catch(e){return null;}}try{const dlg=await fetch(`${API_BASE_URL}/api/v1/files/save-dialog`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({default_name:defaultName,filter_name:defaultName.toLowerCase().endsWith('.mid')?'MIDI':'Audio',filter_ext:defaultName.split('.').pop()||'bin'})});if(!dlg.ok)return null;const d=await dlg.json();if(!d.path)return null;const fd=new FormData();fd.append('path',d.path);fd.append('file',new File([blob],defaultName,{type:blob.type||'application/octet-stream'}));const wr=await fetch(`${API_BASE_URL}/api/v1/files/write`,{method:'POST',body:fd});if(!wr.ok)return null;const w=await wr.json();return w.path;}catch(e){return null;}}// ── MIDI Export: tạo file MIDI từ tất cả tracks ──
 // ── Server-side MIDI export (BIG_PHASE_3 Phase 1) ──
 // Blob download bị WebView2 chặn sau khi chuyển standalone → POST
 // /api/v1/export/midi (server sinh file .mid) + GET download (network
@@ -2268,7 +2277,7 @@ useEffect(()=>{if(typeof window.DAWCommandDispatcher==='undefined')return;const
 const itemStartTimeSec=currentTime;const newMidiItem={id:'item_ai_'+Date.now()+'_'+Math.random().toString(36).substr(2,5),name:`${composition_title||'AI Theme'} - ${aiTrack.track_name}`,parent_track_id:targetTrack.id,startTime:itemStartTimeSec,duration:durationSec,length_bars:total_bars,notes:aiTrack.notes.map((note,index)=>({id:`note_ai_${Date.now()}_${index}`,pitch:note.pitch,start_beat:note.start_beat,duration_beats:note.duration_beats,velocity:note.velocity||0.8,pan:0.0}))};targetTrack.midiItems=[...(targetTrack.midiItems||[]),newMidiItem];if(aiTrack.soundfont_bank!==undefined&&aiTrack.soundfont_program!==undefined){targetTrack.soundfont_bank=aiTrack.soundfont_bank;targetTrack.soundfont_program=aiTrack.soundfont_program;targetTrack.soundfont_id=aiTrack.soundfont_id||'';const sfEngine={type:'soundfont',plugin_id:aiTrack.soundfont_id?'sf_'+aiTrack.soundfont_id:null,soundfont_bank:aiTrack.soundfont_bank,soundfont_program:aiTrack.soundfont_program,soundfont_id:aiTrack.soundfont_id||''};targetTrack.synth_engine=sfEngine;if(window.SonicSF&&window.SonicSF.applyAITrackInstrument){window.SonicSF.applyAITrackInstrument(aiTrack.soundfont_bank,aiTrack.soundfont_program,sfEngine);}}});return updatedTracks;});showToast(`Đã nạp ${aiTracks.length} tracks MIDI thế hệ AI!`,'success');return{success:true};},rearrangeMidiMelody:args=>{const{rearrange_title,rearranged_notes,soundfont_id,soundfont_bank,soundfont_program}=args;if(!rearranged_notes||rearranged_notes.length===0){return{success:false,error:'No rearranged notes provided'};}const sourceTrackId=window.DAWCommandDispatcher?.rearrangeSourceTrackId||selectedTrackId;const sourceItemName=window.DAWCommandDispatcher?.rearrangeSourceItemName||'Source';const bpmVal=parseInt(bpm)||120;const secondsPerBeat=60.0/bpmVal;const secondsPerBar=secondsPerBeat*4;const totalBeats=rearranged_notes.reduce((max,n)=>Math.max(max,(n.start_beat||0)+(n.duration_beats||1)),0);const totalBars=Math.max(1,Math.ceil(totalBeats/4));const durationSec=totalBars*secondsPerBar;const rearrangeNewId=(activeTracks.length+1).toString();updateActiveTracks(prev=>{let updatedTracks=[...prev];// Find source track index to insert new track right after it
 const sourceIdx=sourceTrackId?updatedTracks.findIndex(t=>t.id===sourceTrackId||t.id==='track_'+sourceTrackId):-1;const insertIdx=sourceIdx>=0?sourceIdx+1:updatedTracks.length;const colors=['#0f766e','#1d4ed8','#701a75','#a21caf','#b45309'];const newTrack={id:rearrangeNewId,name:`[AI Rearrange] ${rearrange_title||'Variation'}`,type:'MIDI',volumeDb:0,pan:0,muted:false,solo:false,color:colors[insertIdx%colors.length],markers:[],serverFileId:null,clips:[],sections:[],midiItems:[{id:'item_rearr_'+Date.now()+'_'+Math.random().toString(36).substr(2,5),name:`[AI] ${rearrange_title||'Rearranged'} - var`,parent_track_id:rearrangeNewId,startTime:currentTime,duration:durationSec,length_bars:totalBars,notes:rearranged_notes.map((n,i)=>({id:`note_rearr_${Date.now()}_${i}`,pitch:Math.max(0,Math.min(127,n.pitch||60)),start_beat:Math.max(0,parseFloat(n.start_beat)||0),duration_beats:Math.max(0.125,parseFloat(n.duration_beats)||0.25),velocity:Math.max(0.1,Math.min(1.0,n.velocity??0.8)),pan:0.0}))}]};if(soundfont_id||soundfont_bank!==undefined&&soundfont_program!==undefined){newTrack.soundfont_id=soundfont_id||'';newTrack.soundfont_bank=soundfont_bank??0;newTrack.soundfont_program=soundfont_program??0;newTrack.synth_engine={type:'soundfont',plugin_id:soundfont_id?'sf_'+soundfont_id:null,soundfont_bank:soundfont_bank??0,soundfont_program:soundfont_program??0,soundfont_id:soundfont_id||''};}updatedTracks.splice(insertIdx,0,newTrack);return updatedTracks;});showToast(`✅ AI Rearrange: "${rearrange_title}" — ${rearranged_notes.length} notes`,'success');return{success:true,trackId:rearrangeNewId,totalBars};},createMidiItem:args=>{const trackId=String(args.track_id||selectedTrackId);if(!trackId)return{success:false,error:'No track_id provided'};const secondsPerBar=60.0/(parseInt(bpm)||120)*4;const startBar=args.start_bar!==undefined?parseFloat(args.start_bar):0;const lengthBars=args.length_bars!==undefined?parseFloat(args.length_bars):4;const midiItem={id:`midi_${Date.now()}_${Math.random().toString(36).substr(2,5)}`,name:'MIDI Item',parent_track_id:trackId,startTime:startBar*secondsPerBar,duration:lengthBars*secondsPerBar,length_bars:lengthBars,notes:[],color:'#a78bfa'};updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId&&t.id!=='track_'+trackId)return t;return{...t,midiItems:[...(t.midiItems||[]),midiItem]};}));return{success:true,itemId:midiItem.id,trackId};},modifyMidiNotes:args=>{const itemId=args.item_id;if(!itemId)return{success:false,error:'No item_id provided'};const noteNameToMidi=name=>{if(typeof name==='number')return name;if(!name||typeof name!=='string')return 60;const match=name.match(/^([A-Ga-g]#?|b?)(-?\d+)$/);if(!match){const num=parseInt(name);return isNaN(num)?60:num;}const noteNames={'c':0,'c#':1,'db':1,'d':2,'d#':3,'eb':3,'e':4,'f':5,'f#':6,'gb':6,'g':7,'g#':8,'ab':8,'a':9,'a#':10,'bb':10,'b':11};const key=match[1].toLowerCase();const octave=parseInt(match[2]);const base=noteNames[key]!==undefined?noteNames[key]:0;return(octave+1)*12+base;};const newNotes=(args.notes||[]).map((n,index)=>({id:`note_mod_${Date.now()}_${index}`,pitch:noteNameToMidi(n.pitch),start_beat:parseFloat(n.start_time||0),duration_beats:parseFloat(n.duration||1),velocity:n.velocity!==undefined?n.velocity/127.0:0.8,pan:0.0}));updateActiveTracks(prev=>prev.map(t=>{const items=t.midiItems||[];const exists=items.some(m=>m.id===itemId);if(!exists)return t;return{...t,midiItems:items.map(m=>m.id===itemId?{...m,notes:newNotes}:m)};}));return{success:true,itemId};}};window.DAWCommandDispatcher.registerDAWCommands(api);},[tracks,selectedTrackId,currentTime,bpm]);// ── Save AI config to localStorage ──
 useEffect(()=>{localStorage.setItem('ai_base_url',aiConfig.baseUrl);localStorage.setItem('ai_api_key',aiConfig.apiKey);localStorage.setItem('ai_model',aiConfig.model);},[aiConfig]);// ── Auto-save user preferences (panel state, provider) ──
-const prefsRef=useRef({});prefsRef.current={showAIPanel,showExportPanel,showSelectionPanel,showPythonToolsPanel,showMediaExplorer,showFxRack,showMidiEvents,panelPositions,rightSidebarWidth,mediaExplorerHeight,selectedProviderId};useEffect(()=>{const prefs=prefsRef.current;localStorage.setItem('sonic_preferences',JSON.stringify(prefs));if(!currentUser||currentUser==='cached')return;const timer=setTimeout(async()=>{try{await window.SonicAPI.savePreferences(prefs);}catch(e){}},2000);return()=>clearTimeout(timer);},[showAIPanel,showExportPanel,showSelectionPanel,showPythonToolsPanel,showMediaExplorer,showFxRack,showMidiEvents,panelPositions,rightSidebarWidth,mediaExplorerHeight,selectedProviderId,currentUser]);const drawMixerVuMeter=(canvas,peak)=>{if(!canvas)return;const ctx=canvas.getContext('2d');if(!ctx)return;const w=canvas.width;const h=canvas.height;ctx.clearRect(0,0,w,h);ctx.fillStyle='#0d0d0d';ctx.fillRect(0,0,w,h);const barH=peak*h;const grad=ctx.createLinearGradient(0,h,0,0);grad.addColorStop(0,'#22c55e');grad.addColorStop(0.5,'#eab308');grad.addColorStop(0.85,'#ef4444');ctx.fillStyle=grad;ctx.fillRect(0,h-barH,w,barH);};// Master & Track VU meter animation loop
+const prefsRef=useRef({});prefsRef.current={showAIPanel,showExportPanel,showSelectionPanel,showPythonToolsPanel,showMediaExplorer,showMixer,showFxRack,showMidiEvents,panelPositions,rightSidebarWidth,mediaExplorerHeight,selectedProviderId};useEffect(()=>{const prefs=prefsRef.current;localStorage.setItem('sonic_preferences',JSON.stringify(prefs));if(!currentUser||currentUser==='cached')return;const timer=setTimeout(async()=>{try{await window.SonicAPI.savePreferences(prefs);}catch(e){}},2000);return()=>clearTimeout(timer);},[showAIPanel,showExportPanel,showSelectionPanel,showPythonToolsPanel,showMediaExplorer,showMixer,showFxRack,showMidiEvents,panelPositions,rightSidebarWidth,mediaExplorerHeight,selectedProviderId,currentUser]);const drawMixerVuMeter=(canvas,peak)=>{if(!canvas)return;const ctx=canvas.getContext('2d');if(!ctx)return;const w=canvas.width;const h=canvas.height;ctx.clearRect(0,0,w,h);ctx.fillStyle='#0d0d0d';ctx.fillRect(0,0,w,h);const barH=peak*h;const grad=ctx.createLinearGradient(0,h,0,0);grad.addColorStop(0,'#22c55e');grad.addColorStop(0.5,'#eab308');grad.addColorStop(0.85,'#ef4444');ctx.fillStyle=grad;ctx.fillRect(0,h-barH,w,barH);};// Master & Track VU meter animation loop
 const masterVUAnimRef=useRef(null);useEffect(()=>{function tick(){try{// Khi STOP (không play, không recording): vẽ VU RỖNG — không đọc analyser/
 // activity → hết animation dính + master không full sau khi dừng play.
 // ⚠️ NGOẠI LỆ: nếu có MIDI activity live (bật ARM track + bấm phím MIDI
@@ -2314,7 +2323,8 @@ if(audioPeak<0.05)audioPeak=0;const peak=Math.max(audioPeak,midiPeak);const db=p
 // track 2 section không item vẫn nhảy).
 try{const _vf=window.__vuFrame=(window.__vuFrame||0)+1;if(_vf%45===0){console.log('[VU]',trackId,'audio=',audioPeak.toFixed(3),'midi=',midiPeak.toFixed(3),'key=',key,'peak=',Math.max(audioPeak,midiPeak).toFixed(3));}}catch(e){}if(peak>0.001){if(key.endsWith('_mixer')){drawMixerVuMeter(canvas,peak);}else{drawVuMeter(canvas,db);}}else{if(key.endsWith('_mixer')){drawMixerVuMeter(canvas,0);}else{drawVuMeter(canvas,-60);}}});}catch(e){console.warn('VU tick error:',e);}masterVUAnimRef.current=requestAnimationFrame(tick);}masterVUAnimRef.current=requestAnimationFrame(tick);return()=>{if(masterVUAnimRef.current)cancelAnimationFrame(masterVUAnimRef.current);};},[isPlaying]);const handleOpenProject=async(projectId,projectName)=>{setAppWarningModal({title:"Mở dự án",message:"Bạn có muốn mở dự án này? Các thay đổi chưa lưu trên workspace hiện tại sẽ bị mất.",isAlert:false,onConfirm:async()=>{try{const proj=await window.SonicAPI.getCloudProject(projectId);const parsed=JSON.parse(proj.data_json);let restoredTracks=[];let restoredBpm=bpm;let restoredSessionTabs=[];let restoredSubTabs=[];if(parsed.main_session){const result=deserializeProjectFromSchema(parsed);restoredTracks=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;// Bỏ qua zoom ≤ 1 (data cũ lưu 1.0 — lỗi __currentZoom của Media
 // Explorer) — áp dụng mới giữ zoom hiện tại/localStorage.
-if(result.zoom>1&&setZoom)setZoom(result.zoom);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{restoredTracks=(parsed.tracks||[]).map(function(t){const rest=Object.assign({},t);delete rest.height;return Object.assign({},rest,{buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null});});}setTracks(restoredTracks);loadAudioBuffersForTracks(restoredTracks).catch(function(err){console.warn('loadAudioBuffersForTracks error:',err);});trackMidiChannelsRef.current={};preloadTrackInstruments(restoredTracks).catch(function(err){console.warn('preloadTrackInstruments error:',err);});setBpm(restoredBpm.toString());setSelectedTrackId(restoredTracks[0]?.id||'1');setProjectName(proj.name);setCurrentProjectId(proj.id);if(restoredSessionTabs.length>0)setSessionTabs(restoredSessionTabs);if(restoredSubTabs.length>0)setSubTabs(restoredSubTabs);localStorage.setItem('sonic_project_name',proj.name);localStorage.setItem('sonic_project_id',proj.id);showToast('Đã nạp dự án "'+proj.name+'" thành công!',"success");}catch(e){showToast(e.message||"Lỗi khi nạp dự án","error");}}});};return/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",{className:"h-full w-full flex flex-col bg-[#1e1e1e]"},/*#__PURE__*/React.createElement("header",{className:"h-9 bg-[#2e2e2e] border-b border-[#181818] flex items-center px-1 shrink-0 select-none"},[{label:'File',items:[{label:'New Project',icon:'file-plus',shortcut:'Ctrl+N',action:()=>{// New project: đóng hết tab + reset MỌI trạng thái về mặc định
+if(result.zoom>1&&setZoom)setZoom(result.zoom);// Restore transport loop selection (loop vùng chọn sau save/reload)
+if(result.loopSelection!==undefined&&result.loopSelection){setIsLoopingSelection(true);if(result.selectionStart!=null&&result.selectionEnd!=null){setSelectionStart(result.selectionStart);setSelectionEnd(result.selectionEnd);}}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{restoredTracks=(parsed.tracks||[]).map(function(t){const rest=Object.assign({},t);delete rest.height;return Object.assign({},rest,{buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null});});}setTracks(restoredTracks);loadAudioBuffersForTracks(restoredTracks).catch(function(err){console.warn('loadAudioBuffersForTracks error:',err);});trackMidiChannelsRef.current={};preloadTrackInstruments(restoredTracks).catch(function(err){console.warn('preloadTrackInstruments error:',err);});setBpm(restoredBpm.toString());setSelectedTrackId(restoredTracks[0]?.id||'1');setProjectName(proj.name);setCurrentProjectId(proj.id);if(restoredSessionTabs.length>0)setSessionTabs(restoredSessionTabs);if(restoredSubTabs.length>0)setSubTabs(restoredSubTabs);localStorage.setItem('sonic_project_name',proj.name);localStorage.setItem('sonic_project_id',proj.id);showToast('Đã nạp dự án "'+proj.name+'" thành công!',"success");}catch(e){showToast(e.message||"Lỗi khi nạp dự án","error");}}});};return/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",{className:"h-full w-full flex flex-col bg-[#1e1e1e]"},/*#__PURE__*/React.createElement("header",{className:"h-9 bg-[#2e2e2e] border-b border-[#181818] flex items-center px-1 shrink-0 select-none"},[{label:'File',items:[{label:'New Project',icon:'file-plus',shortcut:'Ctrl+N',action:()=>{// New project: đóng hết tab + reset MỌI trạng thái về mặc định
 try{stopAllPlayback();}catch(e){}setSubTabs([]);setSessionTabs([]);setActiveTab('main');// Reset instrument/channel/route context đã load
 trackMidiChannelsRef.current={};Object.keys(trackMidiBypassMap).forEach(function(k){delete trackMidiBypassMap[k];});Object.keys(trackAudioBypassMap).forEach(function(k){delete trackAudioBypassMap[k];});Object.keys(trackMasteringBypassMap).forEach(function(k){delete trackMasteringBypassMap[k];});setSelectedItemIds(new Set());setTracks([{id:'1',name:'Track 01',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#0f766e',markers:[],serverFileId:null,clips:[],sections:[],midiItems:[]},{id:'2',name:'Track 02',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#1d4ed8',markers:[],serverFileId:null,clips:[],sections:[],midiItems:[]}]);setSelectedTrackId('1');setProjectName('');setCurrentProjectId(null);localStorage.removeItem('sonic_project_name');localStorage.removeItem('sonic_project_id');showToast('New project created','info');}},{label:'Open Project...',icon:'folder-open',shortcut:'Ctrl+O',action:()=>setOpenProjectModalOpen(true)},{label:'Save Project',icon:'upload-cloud',shortcut:'Ctrl+S',action:()=>{// Save project + save TẤT CẢ dirty sub-tabs (user 07:35 — nhấn lưu ở
 // MAIN phải lưu cả piano roll/audio tab đã sửa)
diff --git a/app/templates/index.html b/app/templates/index.html
index 9b7974e..36f0412 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=202608241800" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608231900" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {