diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index aa30d6e..3fc55f4 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -9029,6 +9029,8 @@ const MediaExplorerPanel = ({ height }) => {
   const [computerTree, setComputerTree] = React.useState({});
   const [computerPath, setComputerPath] = React.useState(null);
   const [computerFiles, setComputerFiles] = React.useState([]);
+  const [computerMode, setComputerMode] = React.useState('server');
+  const [clientRoot, setClientRoot] = React.useState(null);
   const canvasRef = React.useRef(null);
   const playStateRef = React.useRef(null);
   const rafRef = React.useRef(null);
@@ -9065,12 +9067,10 @@ const MediaExplorerPanel = ({ height }) => {
   }, [folderFiles, filterText]);
 
   const loadWaveform = async (f) => {
-    if (f && f.path) {
+    if (f && (f.handle || f.path)) {
       try {
-        const url = filePreviewUrl(f);
-        if (!url) { setPeaks(null); return; }
-        const resp = await fetch(url);
-        const buf = await resp.arrayBuffer();
+        const buf = await readLocalFileBuffer(f);
+        if (!buf) { setPeaks(null); return; }
         const ctx = getAudioContext();
         const decoded = await ctx.decodeAudioData(buf);
         setAudioBuffer(decoded);
@@ -9101,6 +9101,26 @@ const MediaExplorerPanel = ({ height }) => {
 
   const openMyComputer = async () => {
     setFolder('computer');
+    if (window.showDirectoryPicker) {
+      try {
+        const handle = await window.showDirectoryPicker({ mode: 'read' });
+        setComputerMode('client');
+        setClientRoot(handle);
+        const rootEntry = { name: handle.name, path: 'root', is_dir: true, handle };
+        setComputerRoots([rootEntry]);
+        setComputerPath('root');
+        setComputerFiles([]);
+        setComputerTree({ root: { handle, parent: null, dirs: [], expanded: true } });
+        await browseComputerDir(rootEntry);
+        return;
+      } catch (e) {
+        if (e && e.name === 'AbortError') return;
+        window.showToast && window.showToast('Không thể mở thư mục: ' + e.message, 'error');
+        return;
+      }
+    }
+    // Fallback: server API (trình duyệt không hỗ trợ File System Access API)
+    setComputerMode('server');
     if (computerRoots) return;
     setComputerRoots(null);
     try {
@@ -9116,7 +9136,48 @@ const MediaExplorerPanel = ({ height }) => {
     }
   };
 
-  const browseComputerDir = async (path) => {
+  const browseClientDir = async (entry) => {
+    const handle = entry && entry.handle;
+    if (!handle || !handle.entries) return;
+    const dirs = [];
+    const files = [];
+    const parentPath = entry.path;
+    try {
+      for await (const [name, h] of handle.entries()) {
+        if (name.startsWith('.')) continue;
+        if (h.kind === 'directory') {
+          dirs.push({ name, path: parentPath + '/' + name, is_dir: true, handle: h });
+        } else {
+          const ext = (name.split('.').pop() || '').toLowerCase();
+          const kind = ext === 'mid' || ext === 'midi' ? 'midi' : (['wav','mp3','ogg','flac','aiff','aif','m4a','aac','opus'].includes(ext) ? 'audio' : 'other');
+          let size = 0;
+          try { const f = await h.getFile(); size = f.size; } catch (e2) {}
+          files.push({ name, path: parentPath + '/' + name, is_dir: false, size_mb: size ? +(size / 1048576).toFixed(2) : 0, ext: '.' + ext, kind, handle: h });
+        }
+      }
+      dirs.sort((a, b) => a.name.localeCompare(b.name));
+      files.sort((a, b) => a.name.localeCompare(b.name));
+      setComputerPath(parentPath);
+      setComputerFiles(files);
+      setSelected(null);
+      setCurrentTime(0);
+      stopMediaPlayback();
+      setComputerTree(prev => ({ ...prev, [parentPath]: { handle, parent: entry.parent || null, dirs, expanded: true } }));
+    } catch (e) {
+      window.showToast && window.showToast('Không thể đọc thư mục: ' + e.message, 'error');
+    }
+  };
+
+  const browseComputerDir = async (entry) => {
+    if (!entry) return;
+    if (computerMode === 'client' || entry.handle) {
+      if (entry.handle && entry.handle.entries) {
+        const parentInfo = computerTree[entry.path];
+        await browseClientDir({ ...entry, parent: parentInfo ? parentInfo.parent : null });
+        return;
+      }
+    }
+    const path = entry.path || entry;
     if (!path) return;
     try {
       const resp = await fetch(`${API_BASE_URL}/api/v1/media/browse?path=${encodeURIComponent(path)}`);
@@ -9133,17 +9194,30 @@ const MediaExplorerPanel = ({ height }) => {
     }
   };
 
-  const toggleComputerDir = async (path) => {
+  const toggleComputerDir = async (entry) => {
+    if (!entry) return;
+    const path = entry.path || entry;
     const node = computerTree[path];
     if (node && node.expanded) {
       setComputerTree(prev => ({ ...prev, [path]: { ...prev[path], expanded: false } }));
     } else {
-      await browseComputerDir(path);
+      await browseComputerDir(entry);
     }
   };
 
   const goComputerParent = () => {
     if (!computerPath) return;
+    if (computerMode === 'client' || clientRoot) {
+      const node = computerTree[computerPath];
+      const parentHandle = node && node.parent;
+      if (parentHandle) {
+        const parentEntry = computerRoots && computerRoots[0] && parentHandle === clientRoot
+          ? computerRoots[0]
+          : { name: parentHandle.name, path: (computerPath.split('/').slice(0, -1).join('/')) || 'root', is_dir: true, handle: parentHandle };
+        browseComputerDir({ ...parentEntry, parent: parentHandle === clientRoot ? null : (computerTree[parentEntry.path] ? computerTree[parentEntry.path].parent : null) });
+      }
+      return;
+    }
     const isUnix = computerPath.startsWith('/');
     const parts = computerPath.split(/[\\/]/).filter(Boolean);
     parts.pop();
@@ -9155,8 +9229,19 @@ const MediaExplorerPanel = ({ height }) => {
     }
   };
 
+  const readLocalFileBuffer = async (f) => {
+    if (f && f.handle && typeof f.handle.getFile === 'function') {
+      const file = await f.handle.getFile();
+      return await file.arrayBuffer();
+    }
+    const url = filePreviewUrl(f);
+    if (!url) return null;
+    const resp = await fetch(url);
+    return await resp.arrayBuffer();
+  };
+
   const filePreviewUrl = (f) => {
-    if (f && f.path) return `${API_BASE_URL}/api/v1/media/file?path=${encodeURIComponent(f.path)}`;
+    if (f && f.path && !(f.handle && f.handle.getFile)) return `${API_BASE_URL}/api/v1/media/file?path=${encodeURIComponent(f.path)}`;
     const fid = f && (f.file_id || f.fileId);
     return fid ? `${API_BASE_URL}/api/v1/audio/download/${fid}` : null;
   };
@@ -9184,12 +9269,10 @@ const MediaExplorerPanel = ({ height }) => {
       return;
     }
     const fid = f.file_id || f.fileId;
-    const url = filePreviewUrl(f);
-    if (!url) return;
+    const buf = await readLocalFileBuffer(f);
+    if (!buf) return;
     try {
       const ctx = getAudioContext();
-      const resp = await fetch(url);
-      const buf = await resp.arrayBuffer();
       const decoded = await ctx.decodeAudioData(buf);
       setAudioBuffer(decoded);
       const src = ctx.createBufferSource();
@@ -9313,7 +9396,8 @@ const MediaExplorerPanel = ({ height }) => {
     if (!isMidiFile(f) && (f.path || f.file_id || f.fileId)) loadWaveform(f);
   };
 
-  const renderComputerNode = (nodePath, name, depth, isRoot) => {
+  const renderComputerNode = (entry, depth, isRoot) => {
+    const nodePath = entry.path;
     const node = computerTree[nodePath];
     const expanded = node && node.expanded;
     const dirs = node ? node.dirs : [];
@@ -9322,13 +9406,13 @@ const MediaExplorerPanel = ({ height }) => {
       <React.Fragment key={nodePath}>
         <div className={`flex items-center gap-1 px-1 py-0.5 cursor-pointer rounded-sm ${computerPath === nodePath ? 'bg-slate-300 text-slate-900' : 'hover:bg-slate-200 text-slate-800'}`}
           style={{ paddingLeft: pad }}
-          onClick={() => browseComputerDir(nodePath)}
-          onDoubleClick={e => { e.stopPropagation(); toggleComputerDir(nodePath); }}>
-          <i className={`fa-solid ${expanded ? 'fa-minus' : 'fa-plus'} text-[9px] text-slate-500 w-3 text-center shrink-0`} onClick={e => { e.stopPropagation(); toggleComputerDir(nodePath); }}></i>
+          onClick={() => browseComputerDir(entry)}
+          onDoubleClick={e => { e.stopPropagation(); toggleComputerDir(entry); }}>
+          <i className={`fa-solid ${expanded ? 'fa-minus' : 'fa-plus'} text-[9px] text-slate-500 w-3 text-center shrink-0`} onClick={e => { e.stopPropagation(); toggleComputerDir(entry); }}></i>
           <i className={`fa-solid ${isRoot ? 'fa-hard-drive text-[#6ea8dc]' : 'fa-folder text-[#d9a752]'} shrink-0`}></i>
-          <span className="truncate">{name}</span>
+          <span className="truncate">{entry.name}</span>
         </div>
-        {expanded && dirs.map(d => renderComputerNode(d.path, d.name, depth + 1, false))}
+        {expanded && dirs.map(d => renderComputerNode(d, depth + 1, false))}
       </React.Fragment>
     );
   };
@@ -9353,7 +9437,7 @@ const MediaExplorerPanel = ({ height }) => {
       {/* 1. TOP NAVIGATION TOOLBAR */}
       <div className="h-8 bg-[#d4d0c8] border-b border-[#808080] px-2 flex items-center justify-between text-xs shrink-0">
         <div className="flex items-center gap-1 flex-1 mr-2">
-          <button className="w-5 h-5 bg-[#e0e0e0] hover:bg-white border border-[#707070] rounded-sm flex items-center justify-center text-[10px]" title="Back" onClick={() => folder === 'computer' ? browseComputerDir(computerPath || '') : setFolder('library')}>
+          <button className="w-5 h-5 bg-[#e0e0e0] hover:bg-white border border-[#707070] rounded-sm flex items-center justify-center text-[10px]" title="Back" onClick={() => folder === 'computer' ? goComputerParent() : setFolder('library')}>
             <i className="fa-solid fa-arrow-left"></i>
           </button>
           <button className="w-5 h-5 bg-[#e0e0e0] hover:bg-white border border-[#707070] rounded-sm flex items-center justify-center text-[10px]" title="Forward" onClick={() => setFolder('uploads')}>
@@ -9362,7 +9446,7 @@ const MediaExplorerPanel = ({ height }) => {
           <button className="w-5 h-5 bg-[#e0e0e0] hover:bg-white border border-[#707070] rounded-sm flex items-center justify-center text-[10px]" title="Up Directory" onClick={() => folder === 'computer' ? goComputerParent() : setFolder('library')}>
             <i className="fa-solid fa-arrow-up"></i>
           </button>
-          <button className="w-5 h-5 bg-[#e0e0e0] hover:bg-white border border-[#707070] rounded-sm flex items-center justify-center text-[10px]" title="Refresh" onClick={() => { if (folder === 'computer' && computerPath) browseComputerDir(computerPath); else if (window.SonicAPI && window.SonicAPI.listMyFiles) window.SonicAPI.listMyFiles([]).then(d => setUserFiles(d || [])); }}>
+          <button className="w-5 h-5 bg-[#e0e0e0] hover:bg-white border border-[#707070] rounded-sm flex items-center justify-center text-[10px]" title="Refresh" onClick={() => { if (folder === 'computer') { const node = computerTree[computerPath]; if (node && node.handle) browseComputerDir({ name: computerPath.split('/').pop() || computerPath, path: computerPath, is_dir: true, handle: node.handle }); else if (computerPath) browseComputerDir({ name: computerPath.split(/[\\/]/).pop() || computerPath, path: computerPath, is_dir: true }); } else if (window.SonicAPI && window.SonicAPI.listMyFiles) window.SonicAPI.listMyFiles([]).then(d => setUserFiles(d || [])); }}>
             <i className="fa-solid fa-rotate-right"></i>
           </button>
           <div className="flex-1 flex items-center bg-white border border-[#808080] h-5 px-1">
@@ -9394,7 +9478,7 @@ const MediaExplorerPanel = ({ height }) => {
             </div>
             {folder === 'computer' && computerRoots && (
               <div className="pl-3 space-y-0.5">
-                {computerRoots.map(root => renderComputerNode(root.path, root.name, 0, true))}
+                {computerRoots.map(root => renderComputerNode(root, 0, true))}
               </div>
             )}
             <div className={`flex items-center gap-1 px-1 py-0.5 cursor-pointer font-semibold rounded-sm ${folder === 'library' ? 'bg-slate-300 text-slate-900' : 'hover:bg-slate-200 text-slate-800'}`} onClick={() => setFolder('library')}>
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 5b2d165..6cb8214 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -232,11 +232,12 @@ for(let i=0;i<lHistory.length-1;i++){lHistory[i]=lHistory[i+1];rHistory[i]=rHist
 if(woLeftMeterRef.current&&woRightMeterRef.current){const lPct=Math.min(100,leftPeak*100);const rPct=Math.min(100,rightPeak*100);woLeftMeterRef.current.style.width=`${lPct}%`;woRightMeterRef.current.style.width=`${rPct}%`;}// Left channel line (cyan)
 if(woChannelRef.current==='stereo'||woChannelRef.current==='left'){woCtx.strokeStyle='#22d3ee';woCtx.lineWidth=1.2;woCtx.beginPath();for(let i=0;i<lHistory.length;i++){const x=i/(lHistory.length-1)*w;const val=lHistory[i]*zoomGain;const y=centerY-val*centerY;if(i===0)woCtx.moveTo(x,y);else woCtx.lineTo(x,y);}woCtx.stroke();if(woModeRef.current==='envelope'){woCtx.beginPath();for(let i=0;i<lHistory.length;i++){const x=i/(lHistory.length-1)*w;const val=lHistory[i]*zoomGain;const y=centerY+val*centerY;if(i===0)woCtx.moveTo(x,y);else woCtx.lineTo(x,y);}woCtx.stroke();}}// Right channel line (teal)
 if(woChannelRef.current==='stereo'||woChannelRef.current==='right'){woCtx.strokeStyle='#0d9488';woCtx.lineWidth=1.2;woCtx.beginPath();for(let i=0;i<rHistory.length;i++){const x=i/(rHistory.length-1)*w;const val=rHistory[i]*zoomGain;const y=centerY-val*centerY;if(i===0)woCtx.moveTo(x,y);else woCtx.lineTo(x,y);}woCtx.stroke();if(woModeRef.current==='envelope'){woCtx.beginPath();for(let i=0;i<rHistory.length;i++){const x=i/(rHistory.length-1)*w;const val=rHistory[i]*zoomGain;const y=centerY+val*centerY;if(i===0)woCtx.moveTo(x,y);else woCtx.lineTo(x,y);}woCtx.stroke();}}}}renderFrame();return()=>{window.removeEventListener('resize',resizeAll);if(animFrameRef.current)cancelAnimationFrame(animFrameRef.current);};},[isOpen]);React.useEffect(()=>{if(!isOpen){stopAudioDemo();knobsInitializedRef.current=false;}else{setTimeout(()=>{try{window.lucide.createIcons();}catch(e){}},100);}},[isOpen]);if(!isOpen)return null;const switchModule=name=>setOzState(prev=>({...prev,activeModule:name}));const 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items-center justify-center border-r border-slate-800 pr-4"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-slate-400 uppercase oz-font-mono mb-3"},"Maximizer Gain Boost"),/*#__PURE__*/React.createElement("div",{className:"my-2"},/*#__PURE__*/React.createElement(MasteringKnob,{param:"maxGain",min:0,max:12,value:ozState.maxGain,unit:"dB",color:"#22d3ee",size:"large",onChange:(p,v)=>setOzState(prev=>({...prev,[p]:v}))})),/*#__PURE__*/React.createElement("div",{className:"w-full mt-4 bg-slate-950 p-2 rounded-lg border border-slate-800 text-xs oz-font-mono flex flex-col gap-1.5"},/*#__PURE__*/React.createElement("div",{className:"flex justify-between items-center w-full"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400"},"Ceiling Level:"),/*#__PURE__*/React.createElement("span",{className:"text-cyan-400 font-bold"},ozState.ceiling.toFixed(2)," 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border border-slate-700"},"Codec"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700"},"Dither"))))));};// ── Media Explorer Panel (from md/51_MEDIA_EXPLORER.md) ──
-const MEDIA_LIBRARY_SAMPLES=[{name:"MIDI_Loop_01.mid",events:95,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_02_Bass.mid",events:48,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_03_Lead.mid",events:110,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_04.mid",events:76,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_05_Bass.mid",events:52,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_06.mid",events:88,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"}];const MediaExplorerPanel=({height})=>{const[userFiles,setUserFiles]=React.useState([]);const[folder,setFolder]=React.useState('library');const[selected,setSelected]=React.useState(null);const[filterText,setFilterText]=React.useState('');const[viewMode,setViewMode]=React.useState('details');const[isPlaying,setIsPlaying]=React.useState(false);const[isPaused,setIsPaused]=React.useState(false);const[isLooping,setIsLooping]=React.useState(false);const[autoPlay,setAutoPlay]=React.useState(true);const[pitch,setPitch]=React.useState(0.0);const[rate,setRate]=React.useState(1.0);const[volumeDb,setVolumeDb]=React.useState(0.0);const[currentTime,setCurrentTime]=React.useState(0);const[peaks,setPeaks]=React.useState(null);const[audioBuffer,setAudioBuffer]=React.useState(null);const[computerRoots,setComputerRoots]=React.useState(null);const[computerTree,setComputerTree]=React.useState({});const[computerPath,setComputerPath]=React.useState(null);const[computerFiles,setComputerFiles]=React.useState([]);const canvasRef=React.useRef(null);const playStateRef=React.useRef(null);const rafRef=React.useRef(null);React.useEffect(()=>{if(window.SonicAPI&&window.SonicAPI.listMyFiles){window.SonicAPI.listMyFiles([]).then(data=>setUserFiles(data||[])).catch(()=>{});}return()=>{stopMediaPlayback();};// eslint-disable-next-line react-hooks/exhaustive-deps
-},[]);const isMidiFile=f=>f&&(f.kind==='midi'||/\.(mid|midi)$/i.test(f.name||f.original_name||''));const fileDuration=f=>{if(!f)return 0;if(isMidiFile(f))return(f.lengthQn||16)*60/(f.bpm||120);const matches=selected&&(f.path&&f.path===selected.path||!f.path&&(f.file_id||f.fileId)===(selected.file_id||selected.fileId));return f.duration||(audioBuffer&&matches?audioBuffer.duration:0)||0;};const folderFiles=React.useMemo(()=>{if(folder==='library')return MEDIA_LIBRARY_SAMPLES;if(folder==='computer'){const node=computerTree[computerPath]||{dirs:[]};return[...(node.dirs||[]),...computerFiles];}return userFiles.filter(f=>folder==='uploads'?(f.type||'Upload')==='Upload':(f.type||'Processed')==='Processed');},[folder,userFiles,computerFiles,computerTree,computerPath]);const visibleFiles=React.useMemo(()=>{const q=filterText.toLowerCase().trim();if(!q)return folderFiles;return folderFiles.filter(f=>(f.name||f.original_name||'').toLowerCase().includes(q));},[folderFiles,filterText]);const loadWaveform=async f=>{if(f&&f.path){try{const url=filePreviewUrl(f);if(!url){setPeaks(null);return;}const resp=await fetch(url);const buf=await resp.arrayBuffer();const ctx=getAudioContext();const decoded=await ctx.decodeAudioData(buf);setAudioBuffer(decoded);const data=decoded.getChannelData(0);const count=600;const step=Math.max(1,Math.floor(data.length/count));const pk=[];for(let i=0;i<data.length;i+=step){let m=0;for(let j=i;j<Math.min(i+step,data.length);j++){const v=Math.abs(data[j]);if(v>m)m=v;}pk.push(m);}setPeaks(pk);}catch(e){setPeaks(null);}return;}const fid=f.file_id||f.fileId;if(!fid){setPeaks(null);return;}try{const resp=await fetch(`${API_BASE_URL}/api/v1/audio/waveform/${fid}?num_peaks=600`);const data=await resp.json();setPeaks(data.peaks||[]);}catch(e){setPeaks(null);}};const openMyComputer=async()=>{setFolder('computer');if(computerRoots)return;setComputerRoots(null);try{const resp=await fetch(`${API_BASE_URL}/api/v1/media/computer`);if(!resp.ok)throw new Error('HTTP '+resp.status);const data=await resp.json();const roots=data.roots||[];setComputerRoots(roots.length?roots:[{path:'/',name:'Root (/)',is_dir:true}]);if(!roots.length)window.showToast&&window.showToast('Không tìm thấy ổ đĩa nào','warning');}catch(e){setComputerRoots([{path:'/',name:'Root (/)',is_dir:true}]);window.showToast&&window.showToast('Không thể truy cập My Computer: '+e.message,'error');}};const browseComputerDir=async path=>{if(!path)return;try{const resp=await fetch(`${API_BASE_URL}/api/v1/media/browse?path=${encodeURIComponent(path)}`);if(!resp.ok)throw new Error('HTTP '+resp.status);const data=await resp.json();setComputerPath(data.path);setComputerFiles(data.files||[]);setSelected(null);setCurrentTime(0);stopMediaPlayback();setComputerTree(prev=>({...prev,[path]:{dirs:data.dirs||[],expanded:true}}));}catch(e){window.showToast&&window.showToast('Không thể mở thư mục: '+e.message,'error');}};const toggleComputerDir=async path=>{const node=computerTree[path];if(node&&node.expanded){setComputerTree(prev=>({...prev,[path]:{...prev[path],expanded:false}}));}else{await browseComputerDir(path);}};const goComputerParent=()=>{if(!computerPath)return;const isUnix=computerPath.startsWith('/');const parts=computerPath.split(/[\\/]/).filter(Boolean);parts.pop();if(isUnix){browseComputerDir(parts.length?'/'+parts.join('/'):'/');}else{// Windows: quay về root ổ đĩa nếu đã lên tới đỉnh
-browseComputerDir(parts.length?parts.join('\\'):computerPath.split(/[\\/]/)[0]+'\\');}};const filePreviewUrl=f=>{if(f&&f.path)return`${API_BASE_URL}/api/v1/media/file?path=${encodeURIComponent(f.path)}`;const fid=f&&(f.file_id||f.fileId);return fid?`${API_BASE_URL}/api/v1/audio/download/${fid}`:null;};const stopMediaPlayback=React.useCallback(()=>{if(playStateRef.current){try{if(playStateRef.current.source)playStateRef.current.source.stop();}catch(e){}try{if(playStateRef.current.source)playStateRef.current.source.disconnect();}catch(e){}playStateRef.current=null;}if(rafRef.current)cancelAnimationFrame(rafRef.current);rafRef.current=null;setIsPlaying(false);setIsPaused(false);},[]);const playSelected=async f=>{if(!f)return;stopMediaPlayback();if(isMidiFile(f)){playStateRef.current={source:null,ctx:null,fakeStart:performance.now()/1000};setIsPlaying(true);setIsPaused(false);startCanvasClock();return;}const fid=f.file_id||f.fileId;const url=filePreviewUrl(f);if(!url)return;try{const ctx=getAudioContext();const resp=await fetch(url);const buf=await resp.arrayBuffer();const decoded=await ctx.decodeAudioData(buf);setAudioBuffer(decoded);const src=ctx.createBufferSource();src.buffer=decoded;src.loop=isLooping;src.playbackRate.value=rate;const gain=ctx.createGain();const linear=volumeDb<=-50?0:Math.pow(10,volumeDb/20);gain.gain.value=linear;src.connect(gain);gain.connect(ctx.destination);src.start();const startedAt=ctx.currentTime;playStateRef.current={source:src,ctx,startedAt};setIsPlaying(true);setIsPaused(false);startCanvasClock();}catch(e){console.error('Preview failed',e);}};const togglePause=()=>{const st=playStateRef.current;if(!st)return;if(isPaused){if(st.ctx)st.ctx.resume();setIsPaused(false);}else{if(st.ctx)st.ctx.suspend();setIsPaused(true);}};const startCanvasClock=()=>{if(rafRef.current)cancelAnimationFrame(rafRef.current);const tick=()=>{rafRef.current=requestAnimationFrame(tick);let t=currentTime;const st=playStateRef.current;if(st&&!isPaused){t=st.ctx?st.ctx.currentTime-st.startedAt:performance.now()/1000-st.fakeStart;}setCurrentTime(t);drawCanvas(t);};tick();};const drawCanvas=t=>{const canvas=canvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const w=canvas.clientWidth,h=canvas.clientHeight;if(!w||!h)return;canvas.width=w*2;canvas.height=h*2;ctx.scale(2,2);ctx.clearRect(0,0,w,h);ctx.fillStyle='#181818';ctx.fillRect(0,0,w,h);const f=selected;if(!f){ctx.fillStyle='#555';ctx.font='12px JetBrains Mono, monospace';ctx.fillText('No file selected',10,h/2);return;}const dur=fileDuration(f);if(isMidiFile(f)){ctx.strokeStyle='#333';for(let y=0;y<h-14;y+=10){ctx.beginPath();ctx.moveTo(0,y);ctx.lineTo(w,y);ctx.stroke();}ctx.strokeStyle='#444';const beats=f.lengthQn||16;for(let b=0;b<=beats;b+=4){const x=b/beats*w;ctx.beginPath();ctx.moveTo(x,0);ctx.lineTo(x,h-14);ctx.stroke();}ctx.fillStyle='#9ca3af';const events=f.events||76;for(let i=0;i<events;i++){const nx=(i*17+76)%95/100*(w-20);const ny=(i*13+76)%(h-30)+4;ctx.fillRect(nx,ny,Math.max(8,(i%5+1)*10),3);}}else{const pk=peaks&&peaks.length>0?peaks:null;if(pk){const mid=h/2;ctx.fillStyle='#22c55e';for(let i=0;i<pk.length;i++){const x=i/pk.length*w;const ph=Math.max(2,pk[i]*(h/2-4));ctx.fillRect(x,mid-ph,Math.max(1,w/pk.length),ph*2);}}else{ctx.fillStyle='#666';ctx.font='11px monospace';ctx.fillText('Waveform unavailable',10,h/2);}}// ruler
+const MEDIA_LIBRARY_SAMPLES=[{name:"MIDI_Loop_01.mid",events:95,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_02_Bass.mid",events:48,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_03_Lead.mid",events:110,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_04.mid",events:76,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_05_Bass.mid",events:52,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_06.mid",events:88,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"}];const MediaExplorerPanel=({height})=>{const[userFiles,setUserFiles]=React.useState([]);const[folder,setFolder]=React.useState('library');const[selected,setSelected]=React.useState(null);const[filterText,setFilterText]=React.useState('');const[viewMode,setViewMode]=React.useState('details');const[isPlaying,setIsPlaying]=React.useState(false);const[isPaused,setIsPaused]=React.useState(false);const[isLooping,setIsLooping]=React.useState(false);const[autoPlay,setAutoPlay]=React.useState(true);const[pitch,setPitch]=React.useState(0.0);const[rate,setRate]=React.useState(1.0);const[volumeDb,setVolumeDb]=React.useState(0.0);const[currentTime,setCurrentTime]=React.useState(0);const[peaks,setPeaks]=React.useState(null);const[audioBuffer,setAudioBuffer]=React.useState(null);const[computerRoots,setComputerRoots]=React.useState(null);const[computerTree,setComputerTree]=React.useState({});const[computerPath,setComputerPath]=React.useState(null);const[computerFiles,setComputerFiles]=React.useState([]);const[computerMode,setComputerMode]=React.useState('server');const[clientRoot,setClientRoot]=React.useState(null);const canvasRef=React.useRef(null);const playStateRef=React.useRef(null);const rafRef=React.useRef(null);React.useEffect(()=>{if(window.SonicAPI&&window.SonicAPI.listMyFiles){window.SonicAPI.listMyFiles([]).then(data=>setUserFiles(data||[])).catch(()=>{});}return()=>{stopMediaPlayback();};// eslint-disable-next-line react-hooks/exhaustive-deps
+},[]);const isMidiFile=f=>f&&(f.kind==='midi'||/\.(mid|midi)$/i.test(f.name||f.original_name||''));const fileDuration=f=>{if(!f)return 0;if(isMidiFile(f))return(f.lengthQn||16)*60/(f.bpm||120);const matches=selected&&(f.path&&f.path===selected.path||!f.path&&(f.file_id||f.fileId)===(selected.file_id||selected.fileId));return f.duration||(audioBuffer&&matches?audioBuffer.duration:0)||0;};const folderFiles=React.useMemo(()=>{if(folder==='library')return MEDIA_LIBRARY_SAMPLES;if(folder==='computer'){const node=computerTree[computerPath]||{dirs:[]};return[...(node.dirs||[]),...computerFiles];}return userFiles.filter(f=>folder==='uploads'?(f.type||'Upload')==='Upload':(f.type||'Processed')==='Processed');},[folder,userFiles,computerFiles,computerTree,computerPath]);const visibleFiles=React.useMemo(()=>{const q=filterText.toLowerCase().trim();if(!q)return folderFiles;return folderFiles.filter(f=>(f.name||f.original_name||'').toLowerCase().includes(q));},[folderFiles,filterText]);const loadWaveform=async f=>{if(f&&(f.handle||f.path)){try{const buf=await readLocalFileBuffer(f);if(!buf){setPeaks(null);return;}const ctx=getAudioContext();const decoded=await ctx.decodeAudioData(buf);setAudioBuffer(decoded);const data=decoded.getChannelData(0);const count=600;const step=Math.max(1,Math.floor(data.length/count));const pk=[];for(let i=0;i<data.length;i+=step){let m=0;for(let j=i;j<Math.min(i+step,data.length);j++){const v=Math.abs(data[j]);if(v>m)m=v;}pk.push(m);}setPeaks(pk);}catch(e){setPeaks(null);}return;}const fid=f.file_id||f.fileId;if(!fid){setPeaks(null);return;}try{const resp=await fetch(`${API_BASE_URL}/api/v1/audio/waveform/${fid}?num_peaks=600`);const data=await resp.json();setPeaks(data.peaks||[]);}catch(e){setPeaks(null);}};const openMyComputer=async()=>{setFolder('computer');if(window.showDirectoryPicker){try{const handle=await window.showDirectoryPicker({mode:'read'});setComputerMode('client');setClientRoot(handle);const rootEntry={name:handle.name,path:'root',is_dir:true,handle};setComputerRoots([rootEntry]);setComputerPath('root');setComputerFiles([]);setComputerTree({root:{handle,parent:null,dirs:[],expanded:true}});await browseComputerDir(rootEntry);return;}catch(e){if(e&&e.name==='AbortError')return;window.showToast&&window.showToast('Không thể mở thư mục: '+e.message,'error');return;}}// Fallback: server API (trình duyệt không hỗ trợ File System Access API)
+setComputerMode('server');if(computerRoots)return;setComputerRoots(null);try{const resp=await fetch(`${API_BASE_URL}/api/v1/media/computer`);if(!resp.ok)throw new Error('HTTP '+resp.status);const data=await resp.json();const roots=data.roots||[];setComputerRoots(roots.length?roots:[{path:'/',name:'Root (/)',is_dir:true}]);if(!roots.length)window.showToast&&window.showToast('Không tìm thấy ổ đĩa nào','warning');}catch(e){setComputerRoots([{path:'/',name:'Root (/)',is_dir:true}]);window.showToast&&window.showToast('Không thể truy cập My Computer: '+e.message,'error');}};const browseClientDir=async entry=>{const handle=entry&&entry.handle;if(!handle||!handle.entries)return;const dirs=[];const files=[];const parentPath=entry.path;try{for await(const[name,h]of handle.entries()){if(name.startsWith('.'))continue;if(h.kind==='directory'){dirs.push({name,path:parentPath+'/'+name,is_dir:true,handle:h});}else{const ext=(name.split('.').pop()||'').toLowerCase();const kind=ext==='mid'||ext==='midi'?'midi':['wav','mp3','ogg','flac','aiff','aif','m4a','aac','opus'].includes(ext)?'audio':'other';let size=0;try{const f=await h.getFile();size=f.size;}catch(e2){}files.push({name,path:parentPath+'/'+name,is_dir:false,size_mb:size?+(size/1048576).toFixed(2):0,ext:'.'+ext,kind,handle:h});}}dirs.sort((a,b)=>a.name.localeCompare(b.name));files.sort((a,b)=>a.name.localeCompare(b.name));setComputerPath(parentPath);setComputerFiles(files);setSelected(null);setCurrentTime(0);stopMediaPlayback();setComputerTree(prev=>({...prev,[parentPath]:{handle,parent:entry.parent||null,dirs,expanded:true}}));}catch(e){window.showToast&&window.showToast('Không thể đọc thư mục: '+e.message,'error');}};const browseComputerDir=async entry=>{if(!entry)return;if(computerMode==='client'||entry.handle){if(entry.handle&&entry.handle.entries){const parentInfo=computerTree[entry.path];await browseClientDir({...entry,parent:parentInfo?parentInfo.parent:null});return;}}const path=entry.path||entry;if(!path)return;try{const resp=await fetch(`${API_BASE_URL}/api/v1/media/browse?path=${encodeURIComponent(path)}`);if(!resp.ok)throw new Error('HTTP '+resp.status);const data=await resp.json();setComputerPath(data.path);setComputerFiles(data.files||[]);setSelected(null);setCurrentTime(0);stopMediaPlayback();setComputerTree(prev=>({...prev,[path]:{dirs:data.dirs||[],expanded:true}}));}catch(e){window.showToast&&window.showToast('Không thể mở thư mục: '+e.message,'error');}};const toggleComputerDir=async entry=>{if(!entry)return;const path=entry.path||entry;const node=computerTree[path];if(node&&node.expanded){setComputerTree(prev=>({...prev,[path]:{...prev[path],expanded:false}}));}else{await browseComputerDir(entry);}};const goComputerParent=()=>{if(!computerPath)return;if(computerMode==='client'||clientRoot){const node=computerTree[computerPath];const parentHandle=node&&node.parent;if(parentHandle){const parentEntry=computerRoots&&computerRoots[0]&&parentHandle===clientRoot?computerRoots[0]:{name:parentHandle.name,path:computerPath.split('/').slice(0,-1).join('/')||'root',is_dir:true,handle:parentHandle};browseComputerDir({...parentEntry,parent:parentHandle===clientRoot?null:computerTree[parentEntry.path]?computerTree[parentEntry.path].parent:null});}return;}const isUnix=computerPath.startsWith('/');const parts=computerPath.split(/[\\/]/).filter(Boolean);parts.pop();if(isUnix){browseComputerDir(parts.length?'/'+parts.join('/'):'/');}else{// Windows: quay về root ổ đĩa nếu đã lên tới đỉnh
+browseComputerDir(parts.length?parts.join('\\'):computerPath.split(/[\\/]/)[0]+'\\');}};const readLocalFileBuffer=async f=>{if(f&&f.handle&&typeof f.handle.getFile==='function'){const file=await f.handle.getFile();return await file.arrayBuffer();}const url=filePreviewUrl(f);if(!url)return null;const resp=await fetch(url);return await resp.arrayBuffer();};const filePreviewUrl=f=>{if(f&&f.path&&!(f.handle&&f.handle.getFile))return`${API_BASE_URL}/api/v1/media/file?path=${encodeURIComponent(f.path)}`;const fid=f&&(f.file_id||f.fileId);return fid?`${API_BASE_URL}/api/v1/audio/download/${fid}`:null;};const stopMediaPlayback=React.useCallback(()=>{if(playStateRef.current){try{if(playStateRef.current.source)playStateRef.current.source.stop();}catch(e){}try{if(playStateRef.current.source)playStateRef.current.source.disconnect();}catch(e){}playStateRef.current=null;}if(rafRef.current)cancelAnimationFrame(rafRef.current);rafRef.current=null;setIsPlaying(false);setIsPaused(false);},[]);const playSelected=async f=>{if(!f)return;stopMediaPlayback();if(isMidiFile(f)){playStateRef.current={source:null,ctx:null,fakeStart:performance.now()/1000};setIsPlaying(true);setIsPaused(false);startCanvasClock();return;}const fid=f.file_id||f.fileId;const buf=await readLocalFileBuffer(f);if(!buf)return;try{const ctx=getAudioContext();const decoded=await ctx.decodeAudioData(buf);setAudioBuffer(decoded);const src=ctx.createBufferSource();src.buffer=decoded;src.loop=isLooping;src.playbackRate.value=rate;const gain=ctx.createGain();const linear=volumeDb<=-50?0:Math.pow(10,volumeDb/20);gain.gain.value=linear;src.connect(gain);gain.connect(ctx.destination);src.start();const startedAt=ctx.currentTime;playStateRef.current={source:src,ctx,startedAt};setIsPlaying(true);setIsPaused(false);startCanvasClock();}catch(e){console.error('Preview failed',e);}};const togglePause=()=>{const st=playStateRef.current;if(!st)return;if(isPaused){if(st.ctx)st.ctx.resume();setIsPaused(false);}else{if(st.ctx)st.ctx.suspend();setIsPaused(true);}};const startCanvasClock=()=>{if(rafRef.current)cancelAnimationFrame(rafRef.current);const tick=()=>{rafRef.current=requestAnimationFrame(tick);let t=currentTime;const st=playStateRef.current;if(st&&!isPaused){t=st.ctx?st.ctx.currentTime-st.startedAt:performance.now()/1000-st.fakeStart;}setCurrentTime(t);drawCanvas(t);};tick();};const drawCanvas=t=>{const canvas=canvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const w=canvas.clientWidth,h=canvas.clientHeight;if(!w||!h)return;canvas.width=w*2;canvas.height=h*2;ctx.scale(2,2);ctx.clearRect(0,0,w,h);ctx.fillStyle='#181818';ctx.fillRect(0,0,w,h);const f=selected;if(!f){ctx.fillStyle='#555';ctx.font='12px JetBrains Mono, monospace';ctx.fillText('No file selected',10,h/2);return;}const dur=fileDuration(f);if(isMidiFile(f)){ctx.strokeStyle='#333';for(let y=0;y<h-14;y+=10){ctx.beginPath();ctx.moveTo(0,y);ctx.lineTo(w,y);ctx.stroke();}ctx.strokeStyle='#444';const beats=f.lengthQn||16;for(let b=0;b<=beats;b+=4){const x=b/beats*w;ctx.beginPath();ctx.moveTo(x,0);ctx.lineTo(x,h-14);ctx.stroke();}ctx.fillStyle='#9ca3af';const events=f.events||76;for(let i=0;i<events;i++){const nx=(i*17+76)%95/100*(w-20);const ny=(i*13+76)%(h-30)+4;ctx.fillRect(nx,ny,Math.max(8,(i%5+1)*10),3);}}else{const pk=peaks&&peaks.length>0?peaks:null;if(pk){const mid=h/2;ctx.fillStyle='#22c55e';for(let i=0;i<pk.length;i++){const x=i/pk.length*w;const ph=Math.max(2,pk[i]*(h/2-4));ctx.fillRect(x,mid-ph,Math.max(1,w/pk.length),ph*2);}}else{ctx.fillStyle='#666';ctx.font='11px monospace';ctx.fillText('Waveform unavailable',10,h/2);}}// ruler
 ctx.fillStyle='#111';ctx.fillRect(0,h-14,w,14);ctx.fillStyle='#888';ctx.font='9px JetBrains Mono, monospace';const totalBeats=Math.max(4,Math.ceil(dur*(f.bpm||120)/60)||16);for(let b=0;b<=totalBeats;b+=4){const x=b/totalBeats*w;ctx.fillText(String(Math.floor(b/4)),x+2,h-3);}// playhead
-if(isPlaying&&dur>0){const px=t/dur*w;ctx.fillStyle='#ef4444';ctx.fillRect(px,0,2,h-14);}};React.useEffect(()=>{drawCanvas(currentTime);},[peaks,audioBuffer,selected,folder,isPlaying]);React.useEffect(()=>()=>{if(rafRef.current)cancelAnimationFrame(rafRef.current);},[]);const handleSelect=f=>{if(!f||f.is_dir)return;setSelected(f);setCurrentTime(0);if(f.kind==='other'){stopMediaPlayback();return;}if(autoPlay){playSelected(f);}else{stopMediaPlayback();}if(!isMidiFile(f)&&(f.path||f.file_id||f.fileId))loadWaveform(f);};const renderComputerNode=(nodePath,name,depth,isRoot)=>{const node=computerTree[nodePath];const expanded=node&&node.expanded;const dirs=node?node.dirs:[];const pad=12+depth*12;return/*#__PURE__*/React.createElement(React.Fragment,{key:nodePath},/*#__PURE__*/React.createElement("div",{className:`flex items-center gap-1 px-1 py-0.5 cursor-pointer rounded-sm ${computerPath===nodePath?'bg-slate-300 text-slate-900':'hover:bg-slate-200 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",selDur.toFixed(2),"s"),/*#__PURE__*/React.createElement("div",null,"Sample Rate: 44100 Hz"),/*#__PURE__*/React.createElement("div",null,"Type: ",selected.path?selIsMidi?'Local MIDI':selected.kind==='other'?'Local File':'Local Audio':selected.type||'Audio')):/*#__PURE__*/React.createElement("div",null,"No file selected"))),/*#__PURE__*/React.createElement("div",{className:"h-5 bg-[#c0c0c0] border-t border-white flex items-center justify-between text-[11px] font-mono px-1 shrink-0"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3"},/*#__PURE__*/React.createElement("div",{className:"bg-white border border-[#808080] px-1.5 text-slate-900 font-bold"},formatTime(currentTime)," / ",formatTime(selDur))),/*#__PURE__*/React.createElement("div",{className:"text-slate-800 font-bold truncate max-w-[40%]"},selected?selected.name||selected.original_name:'No file selected'),/*#__PURE__*/React.createElement("div",{className:"text-slate-700"},selBpm," bpm x",rate.toFixed(2)))));};const App=()=>{// ── State Definitions ──
 const[tracks,setTracks]=useState([{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:[],isArmed:false,monitoringEnabled:true,inputSource:{deviceType:'NONE',deviceId:''}},{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:[],isArmed:false,monitoringEnabled:true,inputSource:{deviceType:'NONE',deviceId:''}}]);const[appWarningModal,setAppWarningModal]=useState(null);const[bpm,setBpm]=useState(localStorage.getItem('studio_bpm')||'120');const prevBpmRef=useRef(bpm);const[draggedClip,setDraggedClip]=useState(null);const[hoveredTrackId,setHoveredTrackId]=useState(null);// Recalculate item/section/selection durations when BPM changes
 useEffect(()=>{const oldSpb=prevBpmRef.current?60.0/parseFloat(prevBpmRef.current)*4:null;const bpmVal=parseFloat(bpm)||120;const secondsPerBar=60.0/bpmVal*4;// Recalculate range loop selection to maintain bar count (tempo mode only)
 if(oldSpb&&selectionFollowsTempo&&selectionStart!==null&&selectionEnd!==null&&selectionEnd>selectionStart){const startBar=selectionStart/oldSpb;const endBar=selectionEnd/oldSpb;if(endBar-startBar>0.01){setSelectionStart(startBar*secondsPerBar);setSelectionEnd(endBar*secondsPerBar);}}prevBpmRef.current=bpm;// Force canvas redraw
diff --git a/app/templates/index.html b/app/templates/index.html
index 8572df4..20117fe 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -23,7 +23,7 @@
     <script src="/static/js/services/midiExtractor.js?v=202607281052"></script>
     <script src="/static/js/services/promptTemplateManager.js?v=202607281039"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202607290941"></script>
-    <script src="/static/js/app.precompiled.js?v=202608021430" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608021445" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {
diff --git a/wiki.md b/wiki.md
index 353efc0..99c81a3 100644
--- a/wiki.md
+++ b/wiki.md
@@ -1084,3 +1084,8 @@
 - **Tóm tắt thay đổi:** `app/api/v1/media.py` `/browse`: trả về TẤT CẢ file (bỏ lọc media) kèm `kind` (`midi`/`audio`/`other`). Frontend `MediaExplorerPanel`: (1) tree My Computer đệ quy sâu vô hạn (`renderComputerNode`) — click folder chọn + load files, click +/- expand/collapse ở mọi cấp; (2) file list merge dirs + files, click file chọn/preview, click folder vào thư mục; (3) icon theo loại (`fa-folder`/`fa-music`/`fa-file-audio`/`fa-file`); (4) guard: file `kind==='other'` không preview; metadata Type hiện "Local File".
 - **Các file ảnh hưởng:** `app/api/v1/media.py`, `app/static/js/app.jsx`, `app/static/js/app.precompiled.js`, `app/templates/index.html`
 - **Ghi chú/Test (nếu có):** Test backend: browse trả subdir + a.wav(audio)/b.mid(midi)/notes.txt+readme.md(other). Smoke jsdom: root → list folder+file, expand `/data` → `/data/deep` → list loop.mid OK. Hard reload.
+
+### [2026-08-02 14:45] Task: My Computer mở explorer client local qua File System Access API
+- **Tóm tắt thay đổi:** `MediaExplorerPanel` "My Computer" giờ dùng Web API `window.showDirectoryPicker()` (Chrome/Edge) để mở Windows Explorer của MÁY CLIENT chọn thư mục, duyệt qua `FileSystemDirectoryHandle` (`handle.entries()`) — không còn phụ thuộc server/cloud. Tree đệ quy giữ handle mỗi node, `computerMode='client'` + `clientRoot`. Preview audio/MIDI đọc trực tiếp `handle.getFile() → arrayBuffer → decodeAudioData` (helper `readLocalFileBuffer`), không cần URL server. Back/Up/Refresh hoạt động cả 2 mode. Trình duyệt không hỗ trợ FS API → fallback về server API cũ.
+- **Các file ảnh hưởng:** `app/static/js/app.jsx`, `app/static/js/app.precompiled.js`, `app/templates/index.html`
+- **Ghi chú/Test (nếu có):** Smoke jsdom mock `showDirectoryPicker` + handle tree: click My Computer → picker → drive `C:` hiển thị → browse `Users`/`readme.txt` → expand `Users` → `me` OK. Chỉ hoạt động Chrome/Edge (FS Access API). Hard reload.