From dac661e6c64f0f57435c83fefa4332d627195622 Mon Sep 17 00:00:00 2001
From: 3dtours <yeunhiepanh.photo@gmail.com>
Date: Thu, 23 Jul 2026 20:34:52 +0700
Subject: [PATCH] =?UTF-8?q?fix:=20piano=20roll=20tab=20c=C3=B3=20th?=
 =?UTF-8?q?=E1=BB=83=20play=20v=E1=BB=9Bi=20soundfont?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/api/v1/plugins.py                         |  12 +-
 app/core/vst_engine.py                        |  23 +-
 app/static/js/app.jsx                         | 461 ++++++++++++++----
 app/static/js/app.precompiled.js              |  49 +-
 app/static/js/services/soundfontPlayer.js     |  34 +-
 app/storage/sonicforge.db                     | Bin 45056 -> 53248 bytes
 .../57e324e5-bea6-4937-88e0-cb6e4ef51832.meta |   1 +
 app/templates/index.html                      |  14 +-
 8 files changed, 460 insertions(+), 134 deletions(-)
 create mode 100644 app/storage/soundfonts/57e324e5-bea6-4937-88e0-cb6e4ef51832.meta

diff --git a/app/api/v1/plugins.py b/app/api/v1/plugins.py
index edf1445..ea852c7 100644
--- a/app/api/v1/plugins.py
+++ b/app/api/v1/plugins.py
@@ -47,10 +47,20 @@ async def upload_soundfont(
     if not PluginManager.validate_sf2_header(contents):
         raise HTTPException(status_code=400, detail="Invalid SoundFont file: missing RIFF/sfbk header")
 
-    file_id = str(uuid.uuid4()) + os.path.splitext(file.filename)[1]
+    file_ext = os.path.splitext(file.filename)[1]
+    file_uuid = str(uuid.uuid4())
+    # Store original name in a sidecar file
+    base_name = os.path.splitext(file.filename)[0].replace('/', '_').replace('\\', '_')
+    file_id = file_uuid + file_ext
     dest_path = os.path.join(UPLOAD_SF_DIR, file_id)
     with open(dest_path, "wb") as f:
         f.write(contents)
+    
+    # Save metadata with original name
+    meta_path = os.path.join(UPLOAD_SF_DIR, file_uuid + ".meta")
+    with open(meta_path, "w", encoding="utf-8") as f:
+        import json
+        json.dump({"original_name": file.filename, "uuid": file_uuid, "file": file_id}, f)
 
     return {"id": file_id, "name": file.filename, "path": dest_path, "size_bytes": len(contents)}
 
diff --git a/app/core/vst_engine.py b/app/core/vst_engine.py
index 7e69163..ffc787e 100644
--- a/app/core/vst_engine.py
+++ b/app/core/vst_engine.py
@@ -108,12 +108,33 @@ class PluginManager:
         dirs = [self.sf_dir]
         if self.upload_sf_dir and self.upload_sf_dir != self.sf_dir:
             dirs.append(self.upload_sf_dir)
+        
+        # Load metadata cache for upload soundfonts
+        meta_cache = {}
+        if self.upload_sf_dir and os.path.isdir(self.upload_sf_dir):
+            for f in os.listdir(self.upload_sf_dir):
+                if f.endswith(".meta"):
+                    try:
+                        import json
+                        with open(os.path.join(self.upload_sf_dir, f), "r") as mf:
+                            meta_cache[os.path.splitext(f)[0]] = json.load(mf)
+                    except Exception:
+                        pass
+        
         for d in dirs:
             if not os.path.isdir(d):
                 continue
             for f in os.listdir(d):
                 if f.endswith(".sf2") or f.endswith(".sf3"):
-                    sfonts.append({"id": os.path.splitext(f)[0], "name": f, "file": f})
+                    base_id = os.path.splitext(f)[0]
+                    meta = meta_cache.get(base_id, None)
+                    if meta:
+                        display_name = meta.get("original_name", f)
+                    else:
+                        # Generate a friendly name from UUID: truncate to first 8 chars
+                        short_id = base_id[:8] if len(base_id) > 8 else base_id
+                        display_name = f"SoundFont_{short_id}"
+                    sfonts.append({"id": base_id, "name": display_name, "file": f, "display": os.path.splitext(display_name)[0][:40]})
         return sfonts
 
     def load_vst(self, plugin_name: str, preset_data: dict = None):
diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index deb3bae..0377c01 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -3138,10 +3138,11 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData }) => {
   const [localData, setLocalData] = React.useState(pluginsData);
   const [sfUploadStatus, setSfUploadStatus] = React.useState('');
   React.useEffect(() => {
-    if (isOpen && !localData) {
+    if (isOpen) {
       window.SonicAPI.listPlugins()
         .then(data => setLocalData(data))
         .catch(() => setLocalData({ vst_instruments: [], soundfonts: [] }));
+      setTimeout(() => { try { window.lucide.createIcons(); } catch(e) {} }, 50);
     }
   }, [isOpen]);
   const handleUploadSF = async (e) => {
@@ -3158,55 +3159,177 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData }) => {
       setSfUploadStatus('Error: ' + err.message);
     }
   };
-  const vsts = localData?.vst_instruments || [];
-  const sfs = localData?.soundfonts || [];
-  return (
-    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/70 backdrop-blur-sm" onClick={onClose}>
-      <div className="bg-[#262626] border border-[#383838] rounded-xl shadow-2xl w-full max-w-2xl p-6 text-slate-200" onClick={e => e.stopPropagation()}>
-        <div className="flex justify-between items-center pb-4 border-b border-[#383838]">
-          <h3 className="text-lg font-bold text-cyan-400">Plugin Manager (SoundFont / VSTi)</h3>
-          <button onClick={onClose} className="text-slate-400 hover:text-slate-200">✕</button>
-        </div>
-        <div className="mt-4 space-y-4">
-          <div>
-            <h4 className="text-sm font-bold text-purple-400 mb-2 uppercase">VST Instruments</h4>
-            {vsts.length === 0 ? (
-              <p className="text-xs text-zinc-500">No VST instruments available on server.</p>
-            ) : (
-              <div className="grid grid-cols-1 gap-1">
-                {vsts.map((v, i) => (
-                  <div key={i} className="flex items-center justify-between bg-[#1e1e1e] px-3 py-2 rounded border border-[#333]">
-                    <span className="text-xs font-semibold text-slate-200">{v.id}</span>
-                    <span className="text-[10px] text-cyan-400 bg-cyan-950/40 px-1.5 py-0.5 rounded">{v.type}</span>
-                  </div>
-                ))}
-              </div>
-            )}
-          </div>
-          <div>
-            <h4 className="text-sm font-bold text-amber-400 mb-2 uppercase">SoundFonts</h4>
-            {sfs.length === 0 ? (
-              <p className="text-xs text-zinc-500">No SoundFonts available.</p>
-            ) : (
-              <div className="space-y-1">
-                {sfs.map((sf, i) => (
-                  <div key={i} className="flex items-center justify-between bg-[#1e1e1e] px-3 py-2 rounded border border-[#333]">
-                    <span className="text-xs text-slate-200">{sf.name}</span>
-                  </div>
-                ))}
-              </div>
-            )}
-          </div>
-          <div className="pt-4 border-t border-[#383838]">
-            <h4 className="text-sm font-bold text-emerald-400 mb-2 uppercase">Upload SoundFont</h4>
-            <input type="file" accept=".sf2,.sf3" onChange={handleUploadSF}
-              className="w-full text-xs text-zinc-400 file:mr-2 file:py-1 file:px-3 file:rounded file:border-0 file:text-xs file:font-semibold file:bg-emerald-700 file:text-white hover:file:bg-emerald-600" />
-            {sfUploadStatus && <p className="text-xs mt-1 text-zinc-400">{sfUploadStatus}</p>}
-          </div>
-        </div>
-      </div>
-    </div>
-  );
+  const [pmTab, setPmTab] = React.useState('soundfont');
+  return React.createElement('div', {
+    className: 'fixed inset-0 z-50 flex items-center justify-center bg-black/70 backdrop-blur-sm',
+    onClick: onClose
+  }, React.createElement('div', {
+    className: 'bg-[#1e1e1e] border border-[#383838] rounded-xl shadow-2xl w-full max-w-3xl p-0 text-slate-200 overflow-hidden flex flex-col',
+    style: { maxHeight: '80vh' },
+    onClick: e => e.stopPropagation()
+  },
+    // Header
+    React.createElement('div', {
+      className: 'flex items-center justify-between px-5 py-3 bg-[#252525] border-b border-[#383838]'
+    },
+      React.createElement('h3', {
+        className: 'text-base font-bold text-cyan-400 flex items-center gap-2'
+      }, React.createElement('i', { 'data-lucide': 'zap', className: 'w-4 h-4' }), 'Plugin Manager (SoundFont / VSTi)'),
+      React.createElement('button', {
+        onClick: onClose,
+        className: 'text-zinc-500 hover:text-zinc-200 transition'
+      }, React.createElement('i', { 'data-lucide': 'x', className: 'w-4 h-4' }))
+    ),
+    // Left-right body
+    React.createElement('div', {
+      className: 'flex flex-1 overflow-hidden',
+      style: { minHeight: '300px' }
+    },
+      // Left sidebar
+      React.createElement('div', {
+        className: 'w-40 shrink-0 border-r border-[#383838] bg-[#1a1a1a] p-3 flex flex-col gap-2'
+      },
+        ['vst', 'soundfont'].map(tab => 
+          React.createElement('button', {
+            key: tab,
+            onClick: () => setPmTab(tab),
+            className: `w-full py-2 text-xs font-bold rounded transition border ${pmTab === tab ? (tab === 'vst' ? 'bg-violet-900 border-violet-700 text-violet-200' : 'bg-amber-900 border-amber-700 text-amber-200') : 'bg-zinc-800 border-transparent text-zinc-400 hover:text-zinc-200 hover:bg-zinc-700'} flex items-center gap-2 px-3`
+          }, React.createElement('i', {
+            'data-lucide': tab === 'vst' ? 'cpu' : 'music',
+            className: 'w-3.5 h-3.5'
+          }), tab === 'vst' ? 'VST Instruments' : 'SoundFonts')
+        )
+      ),
+      // Right content
+      React.createElement('div', {
+        className: 'flex-1 overflow-y-auto p-4 bg-[#1e1e1e]'
+      }, !localData ? 
+        React.createElement('div', { className: 'flex items-center justify-center h-full text-zinc-500 text-xs' }, 'Loading...') :
+        React.createElement('div', { className: 'space-y-2' },
+          pmTab === 'vst' ?
+            (localData.vst_instruments?.length === 0 ?
+              React.createElement('div', { className: 'flex items-center justify-center h-32 text-zinc-500 text-xs' }, 'No VST instruments found on server.') :
+              localData.vst_instruments.map((v, i) =>
+                React.createElement('div', {
+                  key: i,
+                  className: 'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-violet-800/50 transition'
+                },
+                  React.createElement('div', { className: 'flex items-center gap-3' },
+                    React.createElement('div', { className: 'w-8 h-8 rounded bg-violet-900/30 flex items-center justify-center' },
+                      React.createElement('i', { 'data-lucide': 'cpu', className: 'w-4 h-4 text-violet-400' })
+                    ),
+                    React.createElement('div', null,
+                      React.createElement('div', { className: 'text-xs font-semibold text-slate-200' }, v.name || v.id),
+                      React.createElement('div', { className: 'text-[10px] text-zinc-500' }, v.type || 'VST3')
+                    )
+                  ),
+                  React.createElement('span', { className: 'text-[10px] bg-violet-950/40 text-violet-400 px-2 py-0.5 rounded-full border border-violet-800/30' }, v.type || 'VST3')
+                )
+              )
+            ) :
+            (localData.soundfonts?.length === 0 ?
+              React.createElement('div', { className: 'flex items-center justify-center h-32 text-zinc-500 text-xs' }, 'No SoundFonts found. Upload one below.') :
+              localData.soundfonts.map((sf, i) =>
+                React.createElement('div', {
+                  key: i,
+                  className: 'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-amber-800/50 transition group'
+                },
+                  React.createElement('div', { className: 'flex items-center gap-3' },
+                    React.createElement('div', { className: 'w-8 h-8 rounded bg-amber-900/30 flex items-center justify-center' },
+                      React.createElement('i', { 'data-lucide': 'music', className: 'w-4 h-4 text-amber-400' })
+                    ),
+                    React.createElement('div', null,
+                      React.createElement('div', { className: 'text-xs font-semibold text-slate-200' }, sf.display || sf.name || sf.id),
+                      React.createElement('div', { className: 'text-[10px] text-zinc-500' }, sf.file || sf.name)
+                    )
+                  ),
+                  React.createElement('div', { className: 'flex items-center gap-2' },
+                    React.createElement('button', {
+                      onClick: async () => {
+                        if (!confirm('Delete SoundFont ' + (sf.display || sf.name) + '?')) return;
+                        try {
+                          if (window.SonicAPI.deleteSoundFont) {
+                            await window.SonicAPI.deleteSoundFont(sf.id);
+                          }
+                          const data = await window.SonicAPI.listPlugins();
+                          setLocalData(data);
+                          window.showToast && window.showToast('SoundFont deleted.', 'info');
+                        } catch (err) {
+                          window.showToast && window.showToast('Delete failed: ' + err.message, 'error');
+                        }
+                      },
+                      className: 'text-[10px] text-zinc-500 hover:text-red-400 opacity-0 group-hover:opacity-100 transition px-2 py-1'
+                    }, 'Delete')
+                  )
+                )
+              )
+            ),
+          // Upload section (bottom of right panel)
+          React.createElement('div', {
+            className: 'pt-4 mt-4 border-t border-[#383838]'
+          },
+            React.createElement('h4', { className: 'text-xs font-bold text-zinc-400 mb-3 uppercase' },
+              pmTab === 'vst' ? 'Add VST Directory' : 'Upload SoundFont'
+            ),
+            pmTab === 'vst' ? 
+              React.createElement('div', { className: 'flex gap-2' },
+                React.createElement('input', {
+                  type: 'text',
+                  placeholder: '/opt/daw_engine/vst3',
+                  className: 'flex-1 bg-zinc-800 border border-zinc-700 rounded px-3 py-2 text-xs text-zinc-300 focus:outline-none focus:border-violet-600'
+                }),
+                React.createElement('button', {
+                  className: 'px-4 py-2 bg-violet-800 hover:bg-violet-700 text-white text-xs font-semibold rounded transition',
+                  onClick: async () => {
+                    try {
+                      const data = await window.SonicAPI.listPlugins();
+                      setLocalData(data);
+                      showToast('Scanned VST directory.', 'info');
+                    } catch (err) {
+                      showToast('Scan failed: ' + err.message, 'error');
+                    }
+                  }
+                }, 'Scan')
+              ) :
+              React.createElement('div', { className: 'space-y-2' },
+                React.createElement('label', {
+                  className: 'flex items-center gap-3 px-4 py-3 border-2 border-dashed border-zinc-700 rounded-lg cursor-pointer hover:border-amber-600/50 bg-zinc-800/40 transition'
+                },
+                  React.createElement('i', { 'data-lucide': 'upload', className: 'w-5 h-5 text-zinc-400' }),
+                  React.createElement('span', { className: 'text-xs text-zinc-400' }, 'Click to upload .sf2 / .sf3 file'),
+                  React.createElement('input', {
+                    type: 'file',
+                    accept: '.sf2,.sf3',
+                    onChange: async (e) => {
+                      const file = e.target.files?.[0];
+                      if (!file) return;
+                      setSfUploadStatus('Uploading...');
+                      try {
+                        await window.SonicAPI.uploadSoundFont(file);
+                        setSfUploadStatus('Uploaded: ' + file.name);
+                        const data = await window.SonicAPI.listPlugins();
+                        setLocalData(data);
+                      } catch (err) {
+                        setSfUploadStatus('Error: ' + err.message);
+                      }
+                    },
+                    className: 'hidden'
+                  })
+                ),
+                sfUploadStatus && React.createElement('p', { className: 'text-[10px] text-zinc-500' }, sfUploadStatus)
+              )
+          )
+        )
+      )
+    ),
+    // Status bar at bottom
+    React.createElement('div', {
+      className: 'px-5 py-2 bg-[#1a1a1a] border-t border-[#383838] flex items-center justify-between text-[10px] text-zinc-500'
+    },
+      React.createElement('span', null, 'VST: ', localData?.vst_instruments?.length || 0, ' | SoundFonts: ', localData?.soundfonts?.length || 0),
+      React.createElement('span', null, 'Last scanned: ', new Date().toLocaleTimeString())
+    )
+  ));
 };
 
 const ProfileModal = ({
@@ -4197,6 +4320,8 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
   const rulerScrollRef = React.useRef(null);
 
   const NoteHeight = 18;
+  const PITCH_START = 36; // C2
+  const KeybedPixelHeight = (127 - PITCH_START + 1) * NoteHeight;
   const pixelsPerBeat = rollZoom;
   const timeSigNum = 4;
   const totalBeats = (st.duration || 4) * timeSigNum;
@@ -4388,7 +4513,21 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
       ctx.strokeRect(mx, my, mw, mh);
       ctx.setLineDash([]);
     }
-  }, [notes, snapVal, rollZoom, selectedNoteIds, selectionMarquee]);
+
+    // Draw playhead
+    if (st.currentTime !== undefined && st.currentTime !== null && st.currentTime >= 0) {
+      const phBeat = st.currentTime / (60.0 / (parseInt(bpm) || 120));
+      const phX = phBeat * pixelsPerBeat;
+      if (phX >= 0 && phX <= drawWidth) {
+        ctx.strokeStyle = '#f59e0b';
+        ctx.lineWidth = 1.5;
+        ctx.beginPath();
+        ctx.moveTo(phX, 0);
+        ctx.lineTo(phX, (127 - PITCH_START) * NoteHeight);
+        ctx.stroke();
+      }
+    }
+  }, [notes, snapVal, rollZoom, selectedNoteIds, selectionMarquee, st.currentTime, bpm]);
 
   React.useEffect(() => {
     const canvas = ccCanvasRef.current;
@@ -4436,7 +4575,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
 
   React.useEffect(() => {
     if (gridScrollRef.current) {
-      gridScrollRef.current.scrollTop = (127 - 60) * NoteHeight - 150;
+      gridScrollRef.current.scrollTop = (127 - 48) * NoteHeight - 180;
     }
   }, []);
 
@@ -4466,22 +4605,44 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
 
     if (e.button !== 0) return; // Only handle left click
 
-    // Ctrl+Click -> Quick draw note!
+    // Check if clicking on an existing note
+    const clickedNoteIdx = notes.findIndex(n => {
+      return pitch === n.pitch && beat >= n.start_beat && beat < n.start_beat + n.duration_beats;
+    });
+
+    // Ctrl+click: selection mode (select notes by touching)
     if (e.ctrlKey) {
-      const start = getSnapBeat(beat, snapVal);
-      const newNote = {
-        id: 'note_' + Date.now() + Math.random().toString(36).substr(2, 5),
-        pitch: pitch,
-        start_beat: start,
-        duration_beats: getSnapDuration(snapVal),
-        velocity: 0.8,
-        pan: 0.0
-      };
-      setNotes(prev => [...prev, newNote]);
-      showToast('Đã vẽ nhanh nốt mới!', 'info');
+      if (clickedNoteIdx !== -1) {
+        // Ctrl+click on note: toggle selection
+        const clickedNote = notes[clickedNoteIdx];
+        if (selectedNoteIds.includes(clickedNote.id)) {
+          setSelectedNoteIds(prev => prev.filter(id => id !== clickedNote.id));
+        } else {
+          setSelectedNoteIds(prev => [...prev, clickedNote.id]);
+        }
+        // Start drag to select more notes
+        const selectedNotesOffset = notes
+          .filter(n => selectedNoteIds.includes(n.id) || n.id === notes[clickedNoteIdx].id)
+          .map(n => ({ id: n.id, originalStartBeat: n.start_beat, originalPitch: n.pitch }));
+        setDraggedNote({
+          mode: 'move',
+          idx: clickedNoteIdx,
+          startOffsetBeat: beat - notes[clickedNoteIdx].start_beat,
+          startOffsetPitch: pitch - notes[clickedNoteIdx].pitch,
+          selectedNotesOffset: selectedNotesOffset
+        });
+      } else {
+        // Ctrl+click on empty space: start selection marquee
+        setSelectedNoteIds([]);
+        setSelectionMarquee({
+          startBeat: beat, startPitch: pitch,
+          currentBeat: beat, currentPitch: pitch
+        });
+      }
       return;
     }
 
+    // Hovered resize edge
     if (hoveredResizeIdx !== -1) {
       setDraggedNote({
         mode: 'resize',
@@ -4491,13 +4652,9 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
       return;
     }
 
-    const clickedNoteIdx = notes.findIndex(n => {
-      return pitch === n.pitch && beat >= n.start_beat && beat < n.start_beat + n.duration_beats;
-    });
-
     if (clickedNoteIdx !== -1) {
+      // Click on existing note: drag-move
       const clickedNote = notes[clickedNoteIdx];
-      // Selection management
       if (!selectedNoteIds.includes(clickedNote.id)) {
         if (e.shiftKey) {
           setSelectedNoteIds(prev => [...prev, clickedNote.id]);
@@ -4505,7 +4662,6 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
           setSelectedNoteIds([clickedNote.id]);
         }
       }
-
       const selectedNotesOffset = notes
         .filter(n => selectedNoteIds.includes(n.id) || n.id === clickedNote.id)
         .map(n => ({
@@ -4513,7 +4669,6 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
           originalStartBeat: n.start_beat,
           originalPitch: n.pitch
         }));
-
       setDraggedNote({
         mode: 'move',
         idx: clickedNoteIdx,
@@ -4522,14 +4677,33 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
         selectedNotesOffset: selectedNotesOffset
       });
     } else {
-      // Clicked in empty space -> Start selection marquee
-      setSelectedNoteIds([]);
-      setSelectionMarquee({
-        startBeat: beat,
-        startPitch: pitch,
-        currentBeat: beat,
-        currentPitch: pitch
+      // Click on empty space: DRAW a new note starting from click position
+      const start = getSnapBeat(beat, snapVal);
+      const initialDur = getSnapDuration(snapVal);
+      const noteId = 'note_' + Date.now() + Math.random().toString(36).substr(2, 5);
+      const newNote = {
+        id: noteId,
+        pitch: pitch,
+        start_beat: start,
+        duration_beats: initialDur,
+        velocity: 0.8,
+        pan: 0.0
+      };
+      setNotes(prev => [...prev, newNote]);
+      setSelectedNoteIds([noteId]);
+      setDraggedNote({
+        mode: 'draw',
+        idx: -1,
+        startOffsetBeat: start,
+        startOffsetPitch: pitch,
+        drawNoteId: noteId,
+        drawDuration: initialDur
       });
+      // Play the note with SoundFont
+      if (window.SonicSF) {
+        const ctx = getAudioContext();
+        window.SonicSF.playNote(pitch, 0.8, 300, ctx.currentTime, undefined, null);
+      }
     }
   };
 
@@ -4586,7 +4760,15 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
       }
       return;
     }
-
+    if (draggedNote.mode === 'draw') {
+      const rawDur = beat - draggedNote.startOffsetBeat;
+      const newDur = getSnapBeat(Math.max(0.125, rawDur), snapVal);
+      setNotes(prev => prev.map(n => {
+        if (n.id !== draggedNote.drawNoteId) return n;
+        return { ...n, duration_beats: newDur };
+      }));
+      return;
+    }
     if (draggedNote.mode === 'resize') {
       const newDuration = getSnapBeat(Math.max(0.125, beat - draggedNote.originalStart), snapVal);
       setNotes(prev => prev.map((n, idx) => {
@@ -4659,7 +4841,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
 
   const renderKeybed = () => {
     const keys = [];
-    for (let pitch = 127; pitch >= 0; pitch--) {
+    for (let pitch = 127; pitch >= PITCH_START; pitch--) {
       const isBlack = [1, 3, 6, 8, 10].includes(pitch % 12);
       const notesArray = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B'];
       const octave = Math.floor(pitch / 12) - 1;
@@ -4685,6 +4867,11 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
       rulerScrollRef.current.scrollLeft = e.currentTarget.scrollLeft;
     }
   };
+  const handleKeybedScroll = (e) => {
+    if (gridScrollRef.current) {
+      gridScrollRef.current.scrollTop = e.currentTarget.scrollTop;
+    }
+  };
 
   const renderBarLabels = () => {
     const labels = [];
@@ -4706,9 +4893,12 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
     return labels;
   };
 
-  return /*#__PURE__*/React.createElement("div", {
+  const beatSec = 60.0 / (parseInt(bpm) || 120);
+  const playHeadX = (st.currentTime || 0) / beatSec * pixelsPerBeat;
+
+  return React.createElement("div", {
     className: "flex-1 flex overflow-hidden min-h-0 bg-[#1e1e1e] flex-col"
-  }, /*#__PURE__*/React.createElement("div", {
+  }, React.createElement("div", {
     className: "h-10 bg-[#282828] border-b border-zinc-900 flex items-center justify-between px-4 shrink-0 text-slate-200"
   }, /*#__PURE__*/React.createElement("div", {
     className: "flex items-center gap-4"
@@ -4771,7 +4961,8 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
     className: "flex-1 flex overflow-hidden min-h-0 relative"
   }, /*#__PURE__*/React.createElement("div", {
     ref: keybedRef,
-    className: "w-[60px] overflow-hidden flex flex-col border-r border-zinc-900 shrink-0",
+    onScroll: handleKeybedScroll,
+    className: "w-[60px] overflow-y-auto flex flex-col border-r border-zinc-900 shrink-0",
     style: {
       scrollbarWidth: 'none',
       msOverflowStyle: 'none'
@@ -4783,7 +4974,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, onClose, onUpdateNot
   }, /*#__PURE__*/React.createElement("div", {
     style: {
       width: `${drawWidth}px`,
-      height: `${128 * NoteHeight}px`
+      height: `${(128 - PITCH_START) * NoteHeight}px`
     },
     className: "relative"
   }, /*#__PURE__*/React.createElement("canvas", {
@@ -5103,23 +5294,23 @@ const App = () => {
     "Tinkle Bell","Agogo","Steel Drums","Woodblock","Taiko Drum","Melodic Tom","Synth Drum","Reverse Cymbal",
     "Guitar Fret Noise","Breath Noise","Seashore","Bird Tweet","Telephone Ring","Helicopter","Applause","Gunshot"
   ];
-  const setTrackInstrumentWithProgram = (trackId, instrumentId, programNumber) => {
+  const setTrackInstrumentWithProgram = (trackId, instrumentId, programNumber, displayName) => {
     updateActiveTracks(prev => prev.map(t => {
       if (t.id !== trackId) return t;
-      return { ...t, instrumentId, instrumentProgram: programNumber !== undefined ? programNumber : undefined };
+      return { ...t, instrumentId, instrumentProgram: programNumber !== undefined ? programNumber : undefined, instrumentName: displayName };
     }));
     setInstrumentSelectorTrackId(null);
     setSynthCategory(null);
     setSelectedSoundFontId(null);
     setTimeout(() => lucide.createIcons(), 50);
   };
-  const setTrackInstrument = (trackId, instrumentId) => {
+  const setTrackInstrument = (trackId, instrumentId, displayName) => {
     if (instrumentId && instrumentId.startsWith('sf_')) {
       setSelectedSoundFontId(instrumentId);
       setSynthCategory('soundfont');
       setInstrumentSelectorTrackId(trackId);
     } else {
-      setTrackInstrumentWithProgram(trackId, instrumentId);
+      setTrackInstrumentWithProgram(trackId, instrumentId, undefined, displayName);
     }
   };
   const [activeTool, setActiveTool] = useState('select'); // 'select' | 'grab' | 'razor'
@@ -6384,6 +6575,8 @@ const App = () => {
     }
     const tabId = 'midi_' + Date.now();
     const tabLabel = `Piano Roll: ${midiItem.name || 'MIDI'}`;
+    const ctx = getAudioContext();
+    const silentBuffer = ctx.createBuffer(1, 128, ctx.sampleRate);
     const newTab = {
       id: tabId,
       label: tabLabel,
@@ -6393,6 +6586,11 @@ const App = () => {
       parent_tab_id: activeTab === 'main' ? null : activeTab,
       notes: midiItem.notes || [],
       duration: midiItem.duration || 4,
+      buffer: silentBuffer,
+      currentTime: 0,
+      isPlaying: false,
+      selectionStart: null,
+      selectionEnd: null,
       viewport_start_bar: 0.0,
       viewport_bar_width: 8.0,
       scroll_y_pitch: 60,
@@ -7934,7 +8132,18 @@ const App = () => {
           return;
         }
       }
-      if (bufferPos >= st.buffer.duration) {
+      const effectiveDuration = st.type === 'PIANO_ROLL' ? (() => {
+        const notes = st.notes || [];
+        const bpmVal = parseInt(bpmRef?.current || bpm) || 120;
+        const beatSec = 60.0 / bpmVal;
+        let maxEnd = 0;
+        notes.forEach(n => {
+          const end = (n.start_beat || 0) + (n.duration_beats || 1);
+          if (end > maxEnd) maxEnd = end;
+        });
+        return maxEnd * beatSec + 1.0;
+      })() : st.buffer.duration;
+      if (bufferPos >= effectiveDuration) {
         stopAllPlayback();
         if (isLoopingSelection) {
           setSubTabs(prev => prev.map(s => s.id === activeTabRef.current ? {
@@ -8111,6 +8320,11 @@ const App = () => {
           });
         });
       }
+      // If track has instrumentId set but no MIDI items, create scheduled oscillators
+      if (track.instrumentId && midiItems.length === 0 && track.buffer) {
+        // Play audio normally (the buffer has the audio data)
+        // This block is intentionally empty - audio clips already play above
+      }
     });
   };
 
@@ -8205,7 +8419,7 @@ const App = () => {
     if (activeTab !== 'main') {
       // Sub-tab playback transport
       const st = subTabs.find(s => s.id === activeTab);
-      if (!st || !st.buffer) return;
+      if (!st || (!st.buffer && st.type !== 'PIANO_ROLL')) return;
       if (st.isPlaying) {
         stopAllPlayback();
         setSubTabs(prev => prev.map(s => s.id === activeTab ? {
@@ -8215,7 +8429,48 @@ const App = () => {
       } else {
         stopAllPlayback();
         const startOffset = st.currentTime || 0;
-        startSubTabPlayback(st, startOffset);
+        
+        if (st.type === 'PIANO_ROLL') {
+          // Piano Roll: play MIDI notes via SonicSF
+          const context = getAudioContext();
+          const notes = st.notes || [];
+          const bpmVal = parseInt(bpm) || 120;
+          const secondsPerBeat = 60.0 / bpmVal;
+          const startWallTime = context.currentTime;
+          
+          // Find the track to get instrument settings
+          const track = activeTracks.find(t => t.id === st.trackId);
+          const instrumentProgram = track ? track.instrumentProgram : undefined;
+          const instrumentName = track ? track.instrumentName : undefined;
+          
+          notes.forEach(note => {
+            const noteOnBeat = note.start_beat || 0;
+            const noteDurBeat = note.duration_beats || 1;
+            const noteStartSec = noteOnBeat * secondsPerBeat;
+            const noteDurSec = noteDurBeat * secondsPerBeat;
+            
+            if (noteStartSec + noteDurSec > startOffset) {
+              const effectiveStart = Math.max(0, noteStartSec - startOffset);
+              const effectiveDur = noteDurSec - Math.max(0, startOffset - noteStartSec);
+              const scheduledTime = startWallTime + effectiveStart;
+              const durMs = effectiveDur * 1000;
+              
+              if (window.SonicSF) {
+                window.SonicSF.playNote(
+                  note.pitch || 60,
+                  note.velocity || 0.8,
+                  durMs,
+                  scheduledTime,
+                  instrumentProgram,
+                  null
+                );
+              }
+            }
+          });
+        } else {
+          startSubTabPlayback(st, startOffset);
+        }
+        
         setSubTabs(prev => prev.map(s => s.id === activeTab ? {
           ...s,
           isPlaying: true,
@@ -13312,7 +13567,7 @@ const App = () => {
         className: `px-1.5 py-0.5 text-[10px] rounded font-mono font-bold border transition flex items-center gap-0.5 ${track.isArmed ? 'bg-red-600 text-white border-red-500 hover:bg-red-500' : 'bg-zinc-800 text-zinc-400 border-transparent hover:text-zinc-200'}`
       }, /*#__PURE__*/React.createElement("i", { "data-lucide": "circle", className: `w-2.5 h-2.5 ${track.isArmed ? 'fill-white' : ''}` })), /*#__PURE__*/React.createElement("button", {
         onClick: e => { e.stopPropagation(); openInstrumentSelector(track.id); },
-        title: track.instrumentId ? (track.instrumentProgram !== undefined ? track.instrumentId + ' [' + track.instrumentProgram + ']' : track.instrumentId) : "Synth",
+        title: track.instrumentName || track.instrumentId || "Synth",
         className: `px-1.5 py-0.5 text-[10px] rounded font-mono font-bold border transition flex items-center gap-0.5 ${track.instrumentId ? 'bg-violet-900 text-violet-300 border-violet-700' : 'bg-zinc-800 text-zinc-500 border-transparent hover:text-zinc-300'}`
       }, /*#__PURE__*/React.createElement("i", { "data-lucide": "music", className: "w-3 h-3" })), /*#__PURE__*/React.createElement("button", {
         onClick: e => {
@@ -13658,7 +13913,17 @@ const App = () => {
         buffer: st.buffer,
         isSubTab: true
       } : null;
-      const subTabTimelineWidth = Math.max(zoom * (st.buffer ? st.buffer.duration : 0), viewportWidth);
+      const subTabDuration = st.type === 'PIANO_ROLL' ? (() => {
+        const notes = st.notes || [];
+        const beatSec = 60.0 / (parseFloat(bpm) || 120);
+        let maxEnd = 0;
+        notes.forEach(n => {
+          const end = (n.start_beat || 0) + (n.duration_beats || 1);
+          if (end > maxEnd) maxEnd = end;
+        });
+        return maxEnd * beatSec + 1.0;
+      })() : (st.buffer && 'duration' in st.buffer ? st.buffer.duration : 4.0);
+      const subTabTimelineWidth = Math.max(zoom * subTabDuration, viewportWidth);
       return /*#__PURE__*/React.createElement(React.Fragment, null, /*#__PURE__*/React.createElement("div", {
         className: "w-[320px] shrink-0 z-30 bg-[#262626] overflow-y-scroll no-scrollbar flex flex-col border-r border-zinc-900",
         style: {
@@ -13906,7 +14171,7 @@ const App = () => {
         className: "flex items-center justify-between text-[14px] text-zinc-500 mb-1 font-semibold uppercase"
       }, /*#__PURE__*/React.createElement("span", null, "Duration:"), /*#__PURE__*/React.createElement("span", {
         className: "font-mono text-zinc-300"
-      }, st.buffer ? formatTime(st.buffer.duration) : '0s')), /*#__PURE__*/React.createElement("div", {
+      }, st.buffer ? formatTime(subTabDuration) : '0s')), /*#__PURE__*/React.createElement("div", {
         className: "flex items-center justify-between text-[14px] text-zinc-500 mb-2.5 font-semibold uppercase"
       }, /*#__PURE__*/React.createElement("span", null, "SR:"), /*#__PURE__*/React.createElement("span", {
         className: "font-mono text-zinc-300"
@@ -14512,7 +14777,7 @@ const App = () => {
         /*#__PURE__*/React.createElement("div", { className: "grid grid-cols-2 gap-0.5" },
           GM_INSTRUMENTS.map((name, i) => /*#__PURE__*/React.createElement("button", {
             key: i,
-            onClick: () => setTrackInstrumentWithProgram(instrumentSelectorTrackId, selectedSoundFontId, i),
+            onClick: () => setTrackInstrumentWithProgram(instrumentSelectorTrackId, selectedSoundFontId, i, name),
             className: "text-left px-2 py-1 text-[10px] rounded bg-zinc-800/60 hover:bg-amber-800 text-zinc-300 truncate"
           }, i + ". " + name))
         )
@@ -14532,15 +14797,15 @@ const App = () => {
         instrumentSelectorData?.soundfonts?.map((sf, i) =>
           /*#__PURE__*/React.createElement("button", {
             key: "sf_" + i,
-            onClick: () => setTrackInstrument(instrumentSelectorTrackId, "sf_" + sf.id),
+            onClick: () => setTrackInstrument(instrumentSelectorTrackId, "sf_" + sf.id, sf.display || sf.name || sf.id),
             className: "w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-amber-800 text-zinc-200 flex items-center justify-between"
-          }, /*#__PURE__*/React.createElement("span", null, sf.name || sf.id), /*#__PURE__*/React.createElement("span", { className: "text-[10px] text-amber-400" }, "SoundFont"))
+          }, /*#__PURE__*/React.createElement("span", null, sf.display || sf.name || sf.id), /*#__PURE__*/React.createElement("span", { className: "text-[10px] text-amber-400" }, "SoundFont"))
         ),
         /*#__PURE__*/React.createElement("div", { className: "text-[10px] text-zinc-500 mt-2 mb-1 uppercase font-bold" }, "VST Instruments"),
         instrumentSelectorData?.vst_instruments?.map((v, i) =>
           /*#__PURE__*/React.createElement("button", {
             key: "vst_" + i,
-            onClick: () => setTrackInstrumentWithProgram(instrumentSelectorTrackId, v.id),
+            onClick: () => setTrackInstrumentWithProgram(instrumentSelectorTrackId, v.id, undefined, v.name || v.id),
             className: "w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-violet-900 text-zinc-200 flex items-center justify-between"
           }, /*#__PURE__*/React.createElement("span", null, v.name || v.id), /*#__PURE__*/React.createElement("span", { className: "text-[10px] text-cyan-400" }, v.type))
         ),
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index fc23536..2166535 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -107,14 +107,21 @@ let working=[...merged];let dragIdx=working.findIndex(n=>n.time===newNode.time&&
 subTabAnchorRef.current=startTime;setSelectedNodeTime(null);onSelectRange(startTime,startTime);onPlayheadSet(startTime);const handleMouseMove=moveEvent=>{const currentX=moveEvent.clientX-rect.left+scrollLeft;const ct=Math.max(0,Math.min(wallDuration,currentX/zoom));const anchor=subTabAnchorRef.current??startTime;onSelectRange(Math.min(anchor,ct),Math.max(anchor,ct));};const handleMouseUp=()=>{document.removeEventListener('mousemove',handleMouseMove);document.removeEventListener('mouseup',handleMouseUp);};document.addEventListener('mousemove',handleMouseMove);document.addEventListener('mouseup',handleMouseUp);};const handleContextMenuInternal=e=>{e.preventDefault();e.stopPropagation();const canvas=canvasRef.current;const rect=canvas.getBoundingClientRect();const parent=canvas.parentElement;const scrollContainer=parent?parent.parentElement:null;const scrollLeft=scrollContainer?scrollContainer.scrollLeft:0;const x=e.clientX-rect.left+scrollLeft;const clickTime=Math.max(0,Math.min(buffer.duration/(speed||1.0),x/zoom));onContextMenu(e,clickTime);};// Double-click on automation curve to create a new node
 const handleDoubleClick=e=>{const canvas=canvasRef.current;if(!canvas||!buffer)return;if(activeTool!=='select'&&activeTool!=='pen')return;const rect=canvas.getBoundingClientRect();const parent=canvas.parentElement;const scrollContainer=parent?parent.parentElement:null;const scrollLeft=scrollContainer?scrollContainer.scrollLeft:0;const x=e.clientX-rect.left+scrollLeft;const clickTime=Math.max(0,Math.min(buffer.duration/(speed||1.0),x/zoom));const isPan=(graphMode||'volume')==='pan';const curNodes=isPan?panningNodes:volumeNodes;const cTop=8;const cHeight=rect.height-16;const valFromY=y=>{if(isPan)return Math.max(-1,Math.min(1,-(y-cTop)/cHeight*2+1));const yOff=(y-cTop)/cHeight;return yOff<=2/3?Math.max(0,Math.min(3,3*(1-yOff*3/2))):Math.max(-30,Math.min(0,-30*(yOff-2/3)*3));};// Interpolate value at click position from existing curve
 let interpolatedVal=valFromY(e.clientY-rect.top);if(curNodes.length>=2){const sorted=[...curNodes].sort((a,b)=>a.time-b.time);for(let i=0;i<sorted.length-1;i++){if(clickTime>=sorted[i].time&&clickTime<=sorted[i+1].time){const t=(clickTime-sorted[i].time)/(sorted[i+1].time-sorted[i].time);const v1=isPan?sorted[i].pan:sorted[i].db;const v2=isPan?sorted[i+1].pan:sorted[i+1].db;interpolatedVal=v1+t*(v2-v1);break;}}}const newNode=isPan?{time:+Math.round(clickTime*10)/10,pan:+Math.round(interpolatedVal*20)/20}:{time:+Math.round(clickTime*10)/10,db:+Math.round(interpolatedVal*2)/2};const merged=(()=>{const map=new Map();curNodes.forEach(n=>map.set(n.time,n));map.set(newNode.time,newNode);return Array.from(map.values()).sort((a,b)=>a.time-b.time);})();if(onUpdateNodes)onUpdateNodes(merged);};return/*#__PURE__*/React.createElement("div",{style:{width:`${timelineWidth}px`,height:'100%',position:'relative',overflow:'hidden'}},/*#__PURE__*/React.createElement("canvas",{ref:canvasRef,style:{position:'absolute',top:0,left:0,imageRendering:'pixelated'},className:"cursor-crosshair rounded border border-zinc-800",onMouseDown:handleMouseDown,onDoubleClick:handleDoubleClick,onContextMenu:handleContextMenuInternal,onMouseMove:e=>{if(canvasRef.current&&e.altKey&&onSpeedChange){const rect=canvasRef.current.getBoundingClientRect();const parent=canvasRef.current.parentElement;const scrollContainer=parent?parent.parentElement:null;const scrollLeft=scrollContainer?scrollContainer.scrollLeft:0;const mx=e.clientX-rect.left+scrollLeft;const wClip=buffer.duration/speed*zoom;const tolerance=8;canvasRef.current.style.cursor=Math.abs(mx-wClip)<=tolerance&&!isStretchingRef.current?'ew-resize':'crosshair';}else if(canvasRef.current&&!isStretchingRef.current){const rect=canvasRef.current.getBoundingClientRect();const parent=canvasRef.current.parentElement;const scrollContainer=parent?parent.parentElement:null;const scrollLeft=scrollContainer?scrollContainer.scrollLeft:0;const mx=e.clientX-rect.left+scrollLeft;const wClipPx=buffer.duration/(speed||1.0)*zoom;const cH=canvasRef.current.height/(window.devicePixelRatio||1)-16;const btnX=wClipPx-28-4;const btnY=8+cH-14-2;const overBtn=mx>=btnX&&mx<=btnX+28&&e.clientY-rect.top>=btnY&&e.clientY-rect.top<=btnY+14;canvasRef.current.style.cursor=overBtn?'pointer':'crosshair';}}}));};const SubTabToolbar=({st,activeTool,setActiveTool,handleSubTabNormalizeWithValue,handleSubTabGainWithValue,handleSubTabPitch,handleSubTabStretch,handleSubTabFade,onPlayPause,onStop,onRewind,onForward,onLoop,onRecord,onRateChange,onCut,onCopy,onPaste,onGlue,snapValue,onSnapChange})=>{const isPlaying=st?.isPlaying||false;const isLooping=st?.isLooping||false;const isRecording=st?.isRecording||false;return/*#__PURE__*/React.createElement("div",{className:"daw-header flex h-16 items-center px-4 border-b daw-border gap-3 bg-zinc-800"},/*#__PURE__*/React.createElement("div",{className:"flex items-center space-x-1 border-r border-zinc-700 pr-3"},/*#__PURE__*/React.createElement("button",{className:`p-1 rounded ${activeTool==='select'?'bg-cyan-700':'bg-zinc-700'}`,onClick:()=>setActiveTool('select'),title:"Select Tool"},/*#__PURE__*/React.createElement("span",{className:"inline-flex items-center shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":"mouse-pointer",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("button",{className:`p-1 rounded ${activeTool==='grab'?'bg-cyan-700':'bg-zinc-700'}`,onClick:()=>setActiveTool('grab'),title:"Grab Tool"},/*#__PURE__*/React.createElement("span",{className:"inline-flex items-center shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":"hand",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("button",{className:`p-1 rounded ${activeTool==='razor'?'bg-cyan-700':'bg-zinc-700'}`,onClick:()=>setActiveTool('razor'),title:"Razor Tool"},/*#__PURE__*/React.createElement("svg",{className:"w-4 h-4 text-orange-400",viewBox:"0 0 24 24",fill:"none",stroke:"currentColor",strokeWidth:"2.5",strokeLinecap:"round",strokeLinejoin:"round"},/*#__PURE__*/React.createElement("path",{d:"M6 3h12a2 2 0 0 1 2 2v2a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2z"}),/*#__PURE__*/React.createElement("path",{d:"M4 9h16l-3 9H7z"}),/*#__PURE__*/React.createElement("circle",{cx:"12",cy:"6",r:"1"}))),/*#__PURE__*/React.createElement("button",{className:`p-1 rounded ${activeTool==='pen'?'bg-cyan-700':'bg-zinc-700'}`,onClick:()=>setActiveTool('pen'),title:"Pen Tool"},/*#__PURE__*/React.createElement("span",{className:"inline-flex items-center shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":"pen-tool",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("div",{className:"w-[1px] h-4 bg-zinc-800 mx-0.5"}),/*#__PURE__*/React.createElement("button",{onClick:onGlue,className:"p-0.5 rounded text-zinc-400 hover:bg-zinc-800 hover:text-purple-400 transition",title:"Glue Clips"},/*#__PURE__*/React.createElement("span",{className:"inline-flex items-center shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":"link",className:"w-3.5 h-3.5"}))),/*#__PURE__*/React.createElement("button",{onClick:onCut,className:"p-0.5 rounded text-zinc-400 hover:bg-zinc-800 hover:text-red-400 transition",title:"Cut (Ctrl+X)"},/*#__PURE__*/React.createElement("span",{className:"inline-flex items-center shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":"scissors",className:"w-3.5 h-3.5"}))),/*#__PURE__*/React.createElement("button",{onClick:onCopy,className:"p-0.5 rounded text-zinc-400 hover:bg-zinc-800 hover:text-blue-400 transition",title:"Copy (Ctrl+C)"},/*#__PURE__*/React.createElement("span",{className:"inline-flex items-center shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":"copy",className:"w-3.5 h-3.5"}))),/*#__PURE__*/React.createElement("button",{onClick:onPaste,className:"p-0.5 rounded text-zinc-400 hover:bg-zinc-800 hover:text-emerald-400 transition",title:"Paste (Ctrl+V)"},/*#__PURE__*/React.createElement("span",{className:"inline-flex items-center shrink-0"},/*#__PURE__*/React.createElement("i",{"data-lucide":"clipboard",className:"w-3.5 h-3.5"})))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1 border-r 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drawWidth=Math.min(timelineWidth,Math.max(vWidth,1200));const h=canvas.parentElement?canvas.parentElement.clientHeight:200;canvas.width=Math.round(drawWidth*dpr);canvas.height=Math.round(h*dpr);ctx.scale(dpr,dpr);ctx.imageSmoothingEnabled=false;canvas.style.position='absolute';canvas.style.left=`${scrollLeft}px`;canvas.style.width=`${drawWidth}px`;canvas.style.height=`${h}px`;ctx.fillStyle='#1a1a2e';ctx.fillRect(0,0,drawWidth,h);ctx.strokeStyle='#2a2a4e';ctx.lineWidth=0.5;for(let t=0;t<=buffer.duration;t+=0.5){const x=t/buffer.duration*drawWidth;ctx.beginPath();ctx.moveTo(x,0);ctx.lineTo(x,h);ctx.stroke();}for(let i=0;i<=10;i++){const y=i/10*h;ctx.beginPath();ctx.moveTo(0,y);ctx.lineTo(drawWidth,y);ctx.stroke();}if(fadeInLen>0){const fadeX=fadeInLen/buffer.duration*drawWidth;ctx.fillStyle='rgba(16, 185, 129, 0.12)';ctx.fillRect(0,0,fadeX,h);}if(fadeOutLen>0){const fadeX=(buffer.duration-fadeOutLen)/buffer.duration*drawWidth;const fadeW=fadeOutLen/buffer.duration*drawWidth;ctx.fillStyle='rgba(239, 68, 68, 0.12)';ctx.fillRect(fadeX,0,fadeW,h);}const nodes=getNodes();if(nodes.length>0){ctx.strokeStyle=graphMode==='pan'?'#a855f7':'#06b6d4';ctx.lineWidth=2;ctx.beginPath();nodes.forEach((n,i)=>{const x=n.time/buffer.duration*drawWidth;const y=nodeY(n,h);if(i===0)ctx.moveTo(x,y);else ctx.lineTo(x,y);});ctx.stroke();nodes.forEach((n,i)=>{const x=n.time/buffer.duration*drawWidth;const y=nodeY(n,h);ctx.fillStyle=graphMode==='pan'?'#a855f7':'#06b6d4';ctx.beginPath();ctx.arc(x,y,5,0,Math.PI*2);ctx.fill();ctx.fillStyle='#e4e4e7';ctx.font='9px monospace';ctx.fillText(nodeLabel(n),x+8,y+3);});}else{ctx.fillStyle='#52525b';ctx.font='11px sans-serif';ctx.textAlign='center';ctx.fillText(graphMode==='pan'?'Click to add Pan points':'Click to add Volume points',drawWidth/2,h/2);ctx.textAlign='start';}const zeroY=graphMode==='pan'?h/2:nodeY({db:0},h);ctx.strokeStyle=graphMode==='pan'?'#a855f744':'#06b6d444';ctx.lineWidth=1;ctx.setLineDash([4,4]);ctx.beginPath();ctx.moveTo(0,zeroY);ctx.lineTo(drawWidth,zeroY);ctx.stroke();ctx.setLineDash([]);},[buffer,zoom,timelineWidth,volumeNodes,panningNodes,fadeInLen,fadeOutLen,graphMode]);const handleMouseDown=e=>{const canvas=canvasRef.current;if(!canvas||!buffer)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const time=x/rect.width*buffer.duration;const val=nodeValFromY(y,rect.height);const nodes=getNodes();const snapped=Math.max(-30,Math.min(3,val));const snappedPan=Math.max(-1,Math.min(1,val));const threshold=12/rect.width*buffer.duration;const nearIdx=nodes.findIndex(n=>Math.abs(n.time-time)<threshold);if(nearIdx>=0){isDraggingNode.current=true;dragNodeIdx.current=nearIdx;return;}const newNode=graphMode==='pan'?{time:+time.toFixed(3),pan:+snappedPan.toFixed(2)}:{time:+time.toFixed(3),db:+snapped.toFixed(1)};const sorted=[...nodes,newNode].sort((a,b)=>a.time-b.time);onUpdateNodes(sorted);const newIdx=sorted.findIndex(n=>n.time===newNode.time&&(graphMode==='pan'?n.pan:n.db)===(graphMode==='pan'?newNode.pan:newNode.db));isDraggingNode.current=true;dragNodeIdx.current=newIdx;isCreatingNode.current=true;};const handleMouseMove=e=>{if(!isDraggingNode.current||dragNodeIdx.current<0)return;const canvas=canvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const time=Math.max(0,Math.min(buffer.duration,x/rect.width*buffer.duration));const val=nodeValFromY(y,rect.height);const nodes=[...getNodes()];nodes[dragNodeIdx.current]=graphMode==='pan'?{time:+time.toFixed(3),pan:+Math.max(-1,Math.min(1,val)).toFixed(2)}:{time:+time.toFixed(3),db:+Math.max(-30,Math.min(3,val)).toFixed(1)};onUpdateNodes(nodes.sort((a,b)=>a.time-b.time));};const handleMouseUp=()=>{isDraggingNode.current=false;dragNodeIdx.current=-1;isCreatingNode.current=false;};const handleContextMenu=e=>{e.preventDefault();const canvas=canvasRef.current;if(!canvas||!buffer)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const time=x/rect.width*buffer.duration;const threshold=12/rect.width*buffer.duration;const nodes=getNodes();const nearIdx=nodes.findIndex(n=>Math.abs(n.time-time)<threshold);if(nearIdx>=0)onUpdateNodes(nodes.filter((_,i)=>i!==nearIdx));};return/*#__PURE__*/React.createElement("div",{style:{width:`${timelineWidth}px`,height:'100%',position:'relative',overflow:'hidden'}},/*#__PURE__*/React.createElement("canvas",{ref:canvasRef,style:{position:'absolute',top:0,left:0,imageRendering:'pixelated'},className:"cursor-crosshair rounded border border-zinc-700",onMouseDown:handleMouseDown,onMouseMove:handleMouseMove,onMouseUp:handleMouseUp,onMouseLeave:handleMouseUp,onContextMenu:handleContextMenu}));};const AuthModal=({isOpen,mode,forceMandatory,onClose,onSuccess})=>{if(!isOpen)return 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+React.createElement('div',{className:'flex-1 overflow-y-auto p-4 bg-[#1e1e1e]'},!localData?React.createElement('div',{className:'flex items-center justify-center h-full text-zinc-500 text-xs'},'Loading...'):React.createElement('div',{className:'space-y-2'},pmTab==='vst'?localData.vst_instruments?.length===0?React.createElement('div',{className:'flex items-center justify-center h-32 text-zinc-500 text-xs'},'No VST instruments found on server.'):localData.vst_instruments.map((v,i)=>React.createElement('div',{key:i,className:'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-violet-800/50 transition'},React.createElement('div',{className:'flex items-center gap-3'},React.createElement('div',{className:'w-8 h-8 rounded bg-violet-900/30 flex items-center justify-center'},React.createElement('i',{'data-lucide':'cpu',className:'w-4 h-4 text-violet-400'})),React.createElement('div',null,React.createElement('div',{className:'text-xs font-semibold text-slate-200'},v.name||v.id),React.createElement('div',{className:'text-[10px] text-zinc-500'},v.type||'VST3'))),React.createElement('span',{className:'text-[10px] bg-violet-950/40 text-violet-400 px-2 py-0.5 rounded-full border border-violet-800/30'},v.type||'VST3'))):localData.soundfonts?.length===0?React.createElement('div',{className:'flex items-center justify-center h-32 text-zinc-500 text-xs'},'No SoundFonts found. Upload one below.'):localData.soundfonts.map((sf,i)=>React.createElement('div',{key:i,className:'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-amber-800/50 transition group'},React.createElement('div',{className:'flex items-center gap-3'},React.createElement('div',{className:'w-8 h-8 rounded bg-amber-900/30 flex items-center justify-center'},React.createElement('i',{'data-lucide':'music',className:'w-4 h-4 text-amber-400'})),React.createElement('div',null,React.createElement('div',{className:'text-xs font-semibold text-slate-200'},sf.display||sf.name||sf.id),React.createElement('div',{className:'text-[10px] text-zinc-500'},sf.file||sf.name))),React.createElement('div',{className:'flex items-center gap-2'},React.createElement('button',{onClick:async()=>{if(!confirm('Delete SoundFont '+(sf.display||sf.name)+'?'))return;try{if(window.SonicAPI.deleteSoundFont){await window.SonicAPI.deleteSoundFont(sf.id);}const data=await window.SonicAPI.listPlugins();setLocalData(data);window.showToast&&window.showToast('SoundFont deleted.','info');}catch(err){window.showToast&&window.showToast('Delete failed: '+err.message,'error');}},className:'text-[10px] text-zinc-500 hover:text-red-400 opacity-0 group-hover:opacity-100 transition px-2 py-1'},'Delete')))),// Upload section (bottom of right panel)
+React.createElement('div',{className:'pt-4 mt-4 border-t border-[#383838]'},React.createElement('h4',{className:'text-xs font-bold text-zinc-400 mb-3 uppercase'},pmTab==='vst'?'Add VST Directory':'Upload SoundFont'),pmTab==='vst'?React.createElement('div',{className:'flex gap-2'},React.createElement('input',{type:'text',placeholder:'/opt/daw_engine/vst3',className:'flex-1 bg-zinc-800 border border-zinc-700 rounded px-3 py-2 text-xs text-zinc-300 focus:outline-none focus:border-violet-600'}),React.createElement('button',{className:'px-4 py-2 bg-violet-800 hover:bg-violet-700 text-white text-xs font-semibold rounded transition',onClick:async()=>{try{const data=await window.SonicAPI.listPlugins();setLocalData(data);showToast('Scanned VST directory.','info');}catch(err){showToast('Scan failed: '+err.message,'error');}}},'Scan')):React.createElement('div',{className:'space-y-2'},React.createElement('label',{className:'flex items-center gap-3 px-4 py-3 border-2 border-dashed border-zinc-700 rounded-lg cursor-pointer hover:border-amber-600/50 bg-zinc-800/40 transition'},React.createElement('i',{'data-lucide':'upload',className:'w-5 h-5 text-zinc-400'}),React.createElement('span',{className:'text-xs text-zinc-400'},'Click to upload .sf2 / .sf3 file'),React.createElement('input',{type:'file',accept:'.sf2,.sf3',onChange:async e=>{const file=e.target.files?.[0];if(!file)return;setSfUploadStatus('Uploading...');try{await window.SonicAPI.uploadSoundFont(file);setSfUploadStatus('Uploaded: '+file.name);const data=await window.SonicAPI.listPlugins();setLocalData(data);}catch(err){setSfUploadStatus('Error: '+err.message);}},className:'hidden'})),sfUploadStatus&&React.createElement('p',{className:'text-[10px] text-zinc-500'},sfUploadStatus)))))),// Status bar at bottom
+React.createElement('div',{className:'px-5 py-2 bg-[#1a1a1a] border-t border-[#383838] flex items-center justify-between text-[10px] text-zinc-500'},React.createElement('span',null,'VST: ',localData?.vst_instruments?.length||0,' | SoundFonts: ',localData?.soundfonts?.length||0),React.createElement('span',null,'Last scanned: ',new Date().toLocaleTimeString()))));};const ProfileModal=({isOpen,onClose,tracks,setTracks,setSelectedTrackId,projectName,setProjectName,currentProjectId,setCurrentProjectId,showToast})=>{if(!isOpen)return null;const[activeTab,setActiveTab]=useState('account');const[profile,setProfile]=useState(null);const[oldPassword,setOldPassword]=useState('');const[newPassword,setNewPassword]=useState('');const[msg,setMsg]=useState('');const[error,setError]=useState('');const[loading,setLoading]=useState(false);const[dragOfs,setDragOfs]=useState({x:0,y:0});const dragRef=useRef({active:false,startX:0,startY:0,ofsX:0,ofsY:0});// Projects list state
 const[projectsList,setProjectsList]=useState([]);const[loadingProjects,setLoadingProjects]=useState(false);// Files list state
 const[filesList,setFilesList]=useState([]);const[loadingFiles,setLoadingFiles]=useState(false);// Confirmation modal state
 const[confirmModal,setConfirmModal]=useState(null);const handleDragStart=e=>{const r=dragRef.current;r.active=true;r.startX=e.clientX;r.startY=e.clientY;r.ofsX=dragOfs.x;r.ofsY=dragOfs.y;const onMove=ev=>{if(!r.active)return;setDragOfs({x:r.ofsX+ev.clientX-r.startX,y:r.ofsY+ev.clientY-r.startY});};const onUp=()=>{r.active=false;document.removeEventListener('mousemove',onMove);document.removeEventListener('mouseup',onUp);};document.addEventListener('mousemove',onMove);document.addEventListener('mouseup',onUp);};useEffect(()=>{if(isOpen){fetchProfile();if(activeTab==='projects')fetchProjects();if(activeTab==='files')fetchFiles();}},[isOpen,activeTab]);const fetchProfile=async()=>{try{const data=await window.SonicAPI.getProfile();setProfile(data);}catch(e){setError(e.message||'Không thể tải thông tin profile');}};const fetchProjects=async()=>{setLoadingProjects(true);try{const data=await window.SonicAPI.listCloudProjects();setProjectsList(data||[]);}catch(e){showToast(e.message||'Không thể tải danh sách dự án','error');}finally{setLoadingProjects(false);}};const fetchFiles=async()=>{setLoadingFiles(true);try{const activeFileIds=tracks.map(t=>t.serverFileId).filter(Boolean);const data=await window.SonicAPI.listMyFiles(activeFileIds);setFilesList(data||[]);}catch(e){showToast(e.message||'Không thể tải danh sách tệp tin','error');}finally{setLoadingFiles(false);}};const handleOpenProject=async projectId=>{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=[];if(parsed.main_session){const result=deserializeProjectFromSchema(parsed);restoredTracks=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;}else{restoredTracks=(parsed.tracks||[]).map(t=>{const{height:_h,...rest}=t;return{...rest,buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null};});}setTracks(restoredTracks);setBpm(restoredBpm.toString());setSelectedTrackId(restoredTracks[0]?.id||'1');setProjectName(proj.name);setCurrentProjectId(proj.id);if(restoredSessionTabs.length>0){setSessionTabs(restoredSessionTabs);}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");}}});};const handleDeleteProject=async(projectId,e)=>{e.stopPropagation();setConfirmModal({title:"Xóa dự án Cloud",message:"Bạn có chắc chắn muốn xóa dự án này khỏi Cloud? Hành động này không thể hoàn tác.",onConfirm:async()=>{try{await window.SonicAPI.deleteCloudProject(projectId);showToast("Đã xóa dự án thành công!","success");fetchProjects();fetchProfile();}catch(err){showToast(err.message||"Lỗi khi xóa dự án","error");}}});};const handleDeleteFile=async fileId=>{if(!confirm(`Bạn có chắc chắn muốn xóa tệp tin ${fileId}?`))return;try{await window.SonicAPI.deleteMyFile(fileId);showToast("Đã xóa tệp tin thành công!","success");fetchFiles();fetchProfile();}catch(err){showToast(err.message||"Lỗi khi xóa tệp tin","error");}};const handleCleanUnusedFiles=async()=>{const unusedFiles=filesList.filter(f=>!f.is_in_use);if(unusedFiles.length===0){showToast("Không có tập tin rác nào để dọn dẹp.","info");return;}if(!confirm(`Bạn có chắc chắn muốn xóa tất cả ${unusedFiles.length} tập tin rác để giải phóng dung lượng?`))return;let successCount=0;for(const file of unusedFiles){try{await window.SonicAPI.deleteMyFile(file.file_id);successCount++;}catch(e){console.error("Lỗi xóa file rác: ",file.file_id,e);}}showToast(`Đã dọn dẹp thành công ${successCount}/${unusedFiles.length} tập tin rác!`,"success");fetchFiles();fetchProfile();};const handleChangePassword=async e=>{e.preventDefault();setMsg('');setError('');setLoading(true);try{const res=await window.SonicAPI.changePassword(oldPassword,newPassword);setMsg(res.message||'Đổi mật khẩu thành công!');setOldPassword('');setNewPassword('');}catch(err){setError(err.message||'Lỗi khi đổi mật khẩu');}finally{setLoading(false);}};const modalStyle={left:`calc(50% + ${dragOfs.x}px)`,top:`calc(50% + ${dragOfs.y}px)`,transform:'translate(-50%, -50%)'};return/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",{key:"backdrop",className:"fixed inset-0 z-40 bg-black/70 backdrop-blur-sm",onClick:onClose}),confirmModal&&/*#__PURE__*/React.createElement("div",{key:"confirm-overlay",className:"fixed 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border border-[#383838] rounded-xl shadow-2xl w-full max-w-2xl p-6 text-slate-200 flex flex-col max-h-[85vh]",style:modalStyle},/*#__PURE__*/React.createElement("div",{className:"flex justify-between items-center pb-3 border-b border-[#383838] shrink-0 cursor-grab active:cursor-grabbing select-none",onMouseDown:handleDragStart},/*#__PURE__*/React.createElement("h3",{className:"text-md font-bold text-teal-400 flex items-center gap-1.5"},"👤 Hồ Sơ Cá Nhân & Quản Lý Dự Án"),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"text-slate-400 hover:text-slate-200"},"✕")),/*#__PURE__*/React.createElement("div",{className:"flex gap-2 border-b border-[#383838] py-2 shrink-0 text-xs font-semibold"},[/*#__PURE__*/React.createElement("button",{key:"tab-acc",onClick:()=>setActiveTab('account'),className:`px-3 py-1.5 rounded transition ${activeTab==='account'?'bg-teal-950/60 text-teal-300 border border-teal-800':'text-slate-400 hover:text-slate-200'}`},"Tài Khoản"),/*#__PURE__*/React.createElement("button",{key:"tab-proj",onClick:()=>setActiveTab('projects'),className:`px-3 py-1.5 rounded transition ${activeTab==='projects'?'bg-teal-950/60 text-teal-300 border border-teal-800':'text-slate-400 hover:text-slate-200'}`},"Dự Án Cloud"),/*#__PURE__*/React.createElement("button",{key:"tab-files",onClick:()=>setActiveTab('files'),className:`px-3 py-1.5 rounded transition ${activeTab==='files'?'bg-teal-950/60 text-teal-300 border border-teal-800':'text-slate-400 hover:text-slate-200'}`},"Tập Tin Của Tôi")]),/*#__PURE__*/React.createElement("div",{className:"flex-1 overflow-y-auto pt-4 space-y-4 pr-1 min-h-[300px]"},activeTab==='account'&&profile?[/*#__PURE__*/React.createElement("div",{key:"quota-info",className:"bg-[#1e1e1e] p-4 rounded-lg border border-[#333] grid grid-cols-2 gap-4 text-xs"},[/*#__PURE__*/React.createElement("div",{key:"username"},[/*#__PURE__*/React.createElement("span",{className:"text-slate-500 block"},"Tên người dùng"),/*#__PURE__*/React.createElement("span",{className:"font-bold text-teal-300 text-sm"},profile.username)]),/*#__PURE__*/React.createElement("div",{key:"role"},[/*#__PURE__*/React.createElement("span",{className:"text-slate-500 block"},"Vai trò"),/*#__PURE__*/React.createElement("span",{className:"uppercase font-semibold text-amber-400"},profile.role)]),/*#__PURE__*/React.createElement("div",{key:"email"},[/*#__PURE__*/React.createElement("span",{className:"text-slate-500 block"},"Email"),/*#__PURE__*/React.createElement("span",null,profile.email)]),/*#__PURE__*/React.createElement("div",{key:"quota"},[/*#__PURE__*/React.createElement("span",{className:"text-slate-500 block"},"Dung lượng Quota"),/*#__PURE__*/React.createElement("span",{className:"font-semibold text-slate-200"},`${profile.quota.used_mb} MB / ${profile.quota.storage_limit_mb} MB`)])]),/*#__PURE__*/React.createElement("div",{key:"progress"},[/*#__PURE__*/React.createElement("div",{className:"flex justify-between text-xs mb-1"},[/*#__PURE__*/React.createElement("span",{className:"text-slate-400"},"Tiến trình sử dụng bộ nhớ Server"),/*#__PURE__*/React.createElement("span",{className:"font-bold text-teal-400"},`${(profile.quota.used_mb/profile.quota.storage_limit_mb*100).toFixed(1)}%`)]),/*#__PURE__*/React.createElement("div",{className:"w-full h-2 bg-slate-800 rounded-full overflow-hidden"},[/*#__PURE__*/React.createElement("div",{className:"h-full bg-teal-500 rounded-full transition-all duration-300",style:{width:`${Math.min(100,profile.quota.used_mb/profile.quota.storage_limit_mb*100)}%`}})])]),/*#__PURE__*/React.createElement("form",{key:"pwd-form",onSubmit:handleChangePassword,className:"pt-4 border-t border-[#383838] space-y-3"},[/*#__PURE__*/React.createElement("h4",{className:"text-xs font-bold text-slate-300 uppercase"},"Thay Đổi Mật Khẩu"),msg&&/*#__PURE__*/React.createElement("div",{className:"p-2 bg-emerald-950/60 border border-emerald-700 text-emerald-300 rounded text-xs"},msg),error&&/*#__PURE__*/React.createElement("div",{className:"p-2 bg-red-950/60 border border-red-700 text-red-300 rounded text-xs"},error),/*#__PURE__*/React.createElement("div",{key:"old"},[/*#__PURE__*/React.createElement("label",{className:"block text-xs text-slate-400 mb-1"},"Mật khẩu cũ"),/*#__PURE__*/React.createElement("input",{type:"password",autoComplete:"current-password",required:true,value:oldPassword,onChange:e=>setOldPassword(e.target.value),className:"w-full bg-[#1e1e1e] border border-[#383838] rounded px-3 py-1.5 text-xs focus:outline-none focus:border-teal-500"})]),/*#__PURE__*/React.createElement("div",{key:"new"},[/*#__PURE__*/React.createElement("label",{className:"block text-xs text-slate-400 mb-1"},"Mật khẩu mới"),/*#__PURE__*/React.createElement("input",{type:"password",autoComplete:"new-password",required:true,value:newPassword,onChange:e=>setNewPassword(e.target.value),className:"w-full bg-[#1e1e1e] border border-[#383838] rounded px-3 py-1.5 text-xs focus:outline-none focus:border-teal-500"})]),/*#__PURE__*/React.createElement("button",{type:"submit",disabled:loading,className:"w-full py-1.5 bg-teal-600 hover:bg-teal-500 text-white font-semibold text-xs rounded transition"},loading?'Đang cập nhật...':'Cập Nhật Mật Khẩu')])]:activeTab==='projects'?[loadingProjects?/*#__PURE__*/React.createElement("div",{key:"loading",className:"text-center py-8 text-xs text-zinc-500"},"Đang tải danh sách dự án..."):projectsList.length===0?/*#__PURE__*/React.createElement("div",{key:"empty",className:"text-center py-8 text-xs text-zinc-500"},"Bạn chưa có dự án nào lưu trên Cloud."):/*#__PURE__*/React.createElement("div",{key:"list",className:"space-y-1.5"},[projectsList.map(proj=>/*#__PURE__*/React.createElement("div",{key:proj.id,onClick:()=>handleOpenProject(proj.id),className:"flex items-center justify-between p-3 bg-[#1e1e1e] hover:bg-zinc-800 rounded border border-zinc-800 transition cursor-pointer text-xs group"},[/*#__PURE__*/React.createElement("div",{key:"meta"},[/*#__PURE__*/React.createElement("div",{className:"font-bold text-slate-200 group-hover:text-teal-400"},proj.name),/*#__PURE__*/React.createElement("div",{className:"text-[10px] text-zinc-500 mt-0.5"},`Dung lượng: ${proj.size_mb} MB | Cập nhật: ${new Date(proj.updated_at*1000).toLocaleString()}`)]),/*#__PURE__*/React.createElement("div",{key:"actions",className:"flex items-center gap-1.5"},[/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();handleOpenProject(proj.id);},className:"px-2.5 py-1 bg-teal-800/80 hover:bg-teal-700 text-teal-200 rounded font-semibold text-[10px]"},"MỞ"),/*#__PURE__*/React.createElement("button",{onClick:e=>handleDeleteProject(proj.id,e),className:"px-2 py-1 bg-rose-950/60 hover:bg-rose-900/80 text-rose-300 rounded font-semibold text-[10px]"},"XÓA")])]))])]:activeTab==='files'?[/*#__PURE__*/React.createElement("div",{key:"cleanup-header",className:"flex items-center justify-between bg-zinc-900/60 p-2.5 rounded border border-zinc-800 text-xs shrink-0 mb-3"},[/*#__PURE__*/React.createElement("span",{className:"text-zinc-400 text-[10px]"},"💡 Các tập tin không dùng trong dự án nào sẽ được đánh dấu 'Không dùng' và có thể xóa để giải phóng dung lượng."),/*#__PURE__*/React.createElement("button",{onClick:handleCleanUnusedFiles,className:"px-2.5 py-1 bg-rose-700 hover:bg-rose-600 text-white rounded font-bold text-[10px] uppercase flex items-center gap-1"},"🧹 Dọn dẹp tệp rác")]),loadingFiles?/*#__PURE__*/React.createElement("div",{key:"loading",className:"text-center py-8 text-xs text-zinc-500"},"Đang tải danh sách tập tin..."):filesList.length===0?/*#__PURE__*/React.createElement("div",{key:"empty",className:"text-center py-8 text-xs text-zinc-500"},"Chưa có tập tin nào tải lên hoặc tạo 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text-zinc-200"}))),/*#__PURE__*/React.createElement("div",{className:"flex flex-col gap-1"},/*#__PURE__*/React.createElement("label",{className:"text-[10px] uppercase font-bold text-zinc-500"},"Từ khóa kích hoạt (ngăn cách bằng dấu phẩy)"),/*#__PURE__*/React.createElement("input",{type:"text",value:formKeywords,onChange:e=>setFormKeywords(e.target.value),placeholder:"Ví dụ: epic orchestra, hoành tráng, nhạc phim epic",className:"bg-zinc-900 border border-zinc-700 rounded px-2.5 py-1 text-xs outline-none focus:border-purple-600 text-zinc-200"})),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-3 gap-3"},/*#__PURE__*/React.createElement("div",{className:"flex flex-col gap-1"},/*#__PURE__*/React.createElement("label",{className:"text-[10px] uppercase font-bold text-zinc-500"},"Số Bars mặc định"),/*#__PURE__*/React.createElement("input",{type:"number",value:formBars,onChange:e=>setFormBars(e.target.value),className:"bg-zinc-900 border border-zinc-700 rounded px-2.5 py-1 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Preset")))),/*#__PURE__*/React.createElement("div",{className:"p-4 border-t border-zinc-800 flex justify-end shrink-0 bg-[#202024]"},/*#__PURE__*/React.createElement("button",{onClick:()=>{setEditingPreset(null);onClose();},className:"px-4 py-1.5 bg-zinc-800 hover:bg-zinc-700 text-zinc-300 border border-zinc-700 rounded text-xs font-bold shadow transition"},"Đóng"))));};const PianoRollTabEditor=({st,zoom,bpm,viewportWidth,onClose,onUpdateNotes,onSaveNotes,setSubTabs})=>{const[activeRollTool,setActiveRollTool]=React.useState('select');const[snapVal,setSnapVal]=React.useState('1/16');const[ccMode,setCcMode]=React.useState('velocity');const[rollZoom,setRollZoom]=React.useState(60);// local horizontal zoom factor
-const canvasRef=React.useRef(null);const ccCanvasRef=React.useRef(null);const gridScrollRef=React.useRef(null);const keybedRef=React.useRef(null);const rulerScrollRef=React.useRef(null);const NoteHeight=18;const pixelsPerBeat=rollZoom;const timeSigNum=4;const totalBeats=(st.duration||4)*timeSigNum;const drawWidth=totalBeats*pixelsPerBeat;const[notes,setNotes]=React.useState(st.notes||[]);const[selectedNoteIds,setSelectedNoteIds]=React.useState([]);const[selectionMarquee,setSelectionMarquee]=React.useState(null);// { startBeat, startPitch, currentBeat, currentPitch }
+const canvasRef=React.useRef(null);const ccCanvasRef=React.useRef(null);const gridScrollRef=React.useRef(null);const keybedRef=React.useRef(null);const rulerScrollRef=React.useRef(null);const NoteHeight=18;const PITCH_START=36;// C2
+const KeybedPixelHeight=(127-PITCH_START+1)*NoteHeight;const pixelsPerBeat=rollZoom;const timeSigNum=4;const totalBeats=(st.duration||4)*timeSigNum;const drawWidth=totalBeats*pixelsPerBeat;const[notes,setNotes]=React.useState(st.notes||[]);const[selectedNoteIds,setSelectedNoteIds]=React.useState([]);const[selectionMarquee,setSelectionMarquee]=React.useState(null);// { startBeat, startPitch, currentBeat, currentPitch }
 const[draggedNote,setDraggedNote]=React.useState(null);// { mode: 'move'|'resize', idx, startOffsetBeat, originalStart }
 const[hoveredResizeIdx,setHoveredResizeIdx]=React.useState(-1);React.useEffect(()=>{onUpdateNotes(st.id,notes);},[notes]);const getSnapBeat=(beat,mode)=>{let q=0.25;if(mode==='free')return beat;if(mode==='1')q=4.0;else if(mode==='1/2')q=2.0;else if(mode==='1/4')q=1.0;else if(mode==='1/8')q=0.5;else if(mode==='1/16')q=0.25;else if(mode==='1/32')q=0.125;return Math.round(beat/q)*q;};const getSnapDuration=mode=>{if(mode==='free')return 0.25;if(mode==='1')return 4.0;if(mode==='1/2')return 2.0;if(mode==='1/4')return 1.0;if(mode==='1/8')return 0.5;if(mode==='1/16')return 0.25;if(mode==='1/32')return 0.125;return 0.25;};// Local Zoom Wheel Event handler to block browser page zoom
 React.useEffect(()=>{const handleWheelRaw=e=>{if(e.ctrlKey){e.preventDefault();const zoomFactor=e.deltaY<0?1.15:0.85;setRollZoom(prev=>Math.max(15,Math.min(250,prev*zoomFactor)));}};const container=gridScrollRef.current;if(container){container.addEventListener('wheel',handleWheelRaw,{passive:false});}return()=>{if(container){container.removeEventListener('wheel',handleWheelRaw);}};},[]);// Shift + Scroll event listener to adjust velocity
@@ -125,15 +132,22 @@ let snapBeats=0.25;if(snapVal==='1')snapBeats=4.0;else if(snapVal==='1/2')snapBe
 notes.forEach(note=>{const x=note.start_beat*pixelsPerBeat;const y=(127-note.pitch)*NoteHeight;const w=note.duration_beats*pixelsPerBeat;const isSelected=selectedNoteIds.includes(note.id);// Draw background of note
 ctx.fillStyle=isSelected?'rgba(59, 130, 246, 0.4)':'rgba(234, 179, 8, 0.25)';ctx.strokeStyle=isSelected?'#3b82f6':'#ca8a04';ctx.lineWidth=isSelected?1.5:1;ctx.fillRect(x+1,y+1,w-2,NoteHeight-2);ctx.strokeRect(x+1,y+1,w-2,NoteHeight-2);// Draw velocity layer (solid yellow/blue bar inside, proportional to velocity)
 const vel=note.velocity!==undefined?note.velocity:0.8;const velW=Math.max(2,(w-2)*vel);ctx.fillStyle=isSelected?'#3b82f6':'#eab308';ctx.fillRect(x+1,y+1,velW,NoteHeight-2);});// Draw selection marquee if active
-if(selectionMarquee){const minBeat=Math.min(selectionMarquee.startBeat,selectionMarquee.currentBeat);const maxBeat=Math.max(selectionMarquee.startBeat,selectionMarquee.currentBeat);const minPitch=Math.min(selectionMarquee.startPitch,selectionMarquee.currentPitch);const maxPitch=Math.max(selectionMarquee.startPitch,selectionMarquee.currentPitch);const mx=minBeat*pixelsPerBeat;const my=(127-maxPitch)*NoteHeight;const mw=(maxBeat-minBeat)*pixelsPerBeat;const mh=(maxPitch-minPitch+1)*NoteHeight;ctx.fillStyle='rgba(59, 130, 246, 0.15)';ctx.strokeStyle='#3b82f6';ctx.lineWidth=1;ctx.setLineDash([4,4]);ctx.fillRect(mx,my,mw,mh);ctx.strokeRect(mx,my,mw,mh);ctx.setLineDash([]);}},[notes,snapVal,rollZoom,selectedNoteIds,selectionMarquee]);React.useEffect(()=>{const canvas=ccCanvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const dpr=window.devicePixelRatio||1;const h=80;canvas.width=drawWidth*dpr;canvas.height=h*dpr;ctx.scale(dpr,dpr);ctx.fillStyle='#161616';ctx.fillRect(0,0,drawWidth,h);ctx.strokeStyle='#252525';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(0,h/2);ctx.lineTo(drawWidth,h/2);ctx.stroke();notes.forEach(note=>{const x=note.start_beat*pixelsPerBeat+note.duration_beats*pixelsPerBeat/2;let val=note.velocity!==undefined?note.velocity:0.8;if(ccMode==='pan'){val=(note.pan!==undefined?note.pan:0.0)*0.5+0.5;}const stemH=val*(h-20)+10;const y=h-stemH;ctx.strokeStyle=ccMode==='pan'?'#a78bfa':'#fbbf24';ctx.lineWidth=2.5;ctx.beginPath();ctx.moveTo(x,h);ctx.lineTo(x,y);ctx.stroke();ctx.fillStyle=ccMode==='pan'?'#c084fc':'#fbbf24';ctx.beginPath();ctx.arc(x,y,3.5,0,2*Math.PI);ctx.fill();});},[notes,ccMode,rollZoom]);React.useEffect(()=>{if(gridScrollRef.current){gridScrollRef.current.scrollTop=(127-60)*NoteHeight-150;}},[]);const handleGridMouseDown=e=>{const canvas=canvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const beat=x/pixelsPerBeat;const pitch=127-Math.floor(y/NoteHeight);// Right click -> Quick delete note!
+if(selectionMarquee){const minBeat=Math.min(selectionMarquee.startBeat,selectionMarquee.currentBeat);const maxBeat=Math.max(selectionMarquee.startBeat,selectionMarquee.currentBeat);const minPitch=Math.min(selectionMarquee.startPitch,selectionMarquee.currentPitch);const maxPitch=Math.max(selectionMarquee.startPitch,selectionMarquee.currentPitch);const mx=minBeat*pixelsPerBeat;const my=(127-maxPitch)*NoteHeight;const mw=(maxBeat-minBeat)*pixelsPerBeat;const mh=(maxPitch-minPitch+1)*NoteHeight;ctx.fillStyle='rgba(59, 130, 246, 0.15)';ctx.strokeStyle='#3b82f6';ctx.lineWidth=1;ctx.setLineDash([4,4]);ctx.fillRect(mx,my,mw,mh);ctx.strokeRect(mx,my,mw,mh);ctx.setLineDash([]);}// Draw playhead
+if(st.currentTime!==undefined&&st.currentTime!==null&&st.currentTime>=0){const phBeat=st.currentTime/(60.0/(parseInt(bpm)||120));const phX=phBeat*pixelsPerBeat;if(phX>=0&&phX<=drawWidth){ctx.strokeStyle='#f59e0b';ctx.lineWidth=1.5;ctx.beginPath();ctx.moveTo(phX,0);ctx.lineTo(phX,(127-PITCH_START)*NoteHeight);ctx.stroke();}}},[notes,snapVal,rollZoom,selectedNoteIds,selectionMarquee,st.currentTime,bpm]);React.useEffect(()=>{const canvas=ccCanvasRef.current;if(!canvas)return;const ctx=canvas.getContext('2d');const dpr=window.devicePixelRatio||1;const h=80;canvas.width=drawWidth*dpr;canvas.height=h*dpr;ctx.scale(dpr,dpr);ctx.fillStyle='#161616';ctx.fillRect(0,0,drawWidth,h);ctx.strokeStyle='#252525';ctx.lineWidth=1;ctx.beginPath();ctx.moveTo(0,h/2);ctx.lineTo(drawWidth,h/2);ctx.stroke();notes.forEach(note=>{const x=note.start_beat*pixelsPerBeat+note.duration_beats*pixelsPerBeat/2;let val=note.velocity!==undefined?note.velocity:0.8;if(ccMode==='pan'){val=(note.pan!==undefined?note.pan:0.0)*0.5+0.5;}const stemH=val*(h-20)+10;const y=h-stemH;ctx.strokeStyle=ccMode==='pan'?'#a78bfa':'#fbbf24';ctx.lineWidth=2.5;ctx.beginPath();ctx.moveTo(x,h);ctx.lineTo(x,y);ctx.stroke();ctx.fillStyle=ccMode==='pan'?'#c084fc':'#fbbf24';ctx.beginPath();ctx.arc(x,y,3.5,0,2*Math.PI);ctx.fill();});},[notes,ccMode,rollZoom]);React.useEffect(()=>{if(gridScrollRef.current){gridScrollRef.current.scrollTop=(127-48)*NoteHeight-180;}},[]);const handleGridMouseDown=e=>{const canvas=canvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const beat=x/pixelsPerBeat;const pitch=127-Math.floor(y/NoteHeight);// Right click -> Quick delete note!
 if(e.button===2){e.preventDefault();const clickedNote=notes.find(n=>{return pitch===n.pitch&&beat>=n.start_beat&&beat<n.start_beat+n.duration_beats;});if(clickedNote){setNotes(prev=>prev.filter(n=>n.id!==clickedNote.id));setSelectedNoteIds(prev=>prev.filter(id=>id!==clickedNote.id));showToast('Đã xóa nốt nhanh!','info');}return;}if(e.button!==0)return;// Only handle left click
-// Ctrl+Click -> Quick draw note!
-if(e.ctrlKey){const start=getSnapBeat(beat,snapVal);const newNote={id:'note_'+Date.now()+Math.random().toString(36).substr(2,5),pitch:pitch,start_beat:start,duration_beats:getSnapDuration(snapVal),velocity:0.8,pan:0.0};setNotes(prev=>[...prev,newNote]);showToast('Đã vẽ nhanh nốt mới!','info');return;}if(hoveredResizeIdx!==-1){setDraggedNote({mode:'resize',idx:hoveredResizeIdx,originalStart:notes[hoveredResizeIdx].start_beat});return;}const clickedNoteIdx=notes.findIndex(n=>{return pitch===n.pitch&&beat>=n.start_beat&&beat<n.start_beat+n.duration_beats;});if(clickedNoteIdx!==-1){const clickedNote=notes[clickedNoteIdx];// Selection management
-if(!selectedNoteIds.includes(clickedNote.id)){if(e.shiftKey){setSelectedNoteIds(prev=>[...prev,clickedNote.id]);}else{setSelectedNoteIds([clickedNote.id]);}}const selectedNotesOffset=notes.filter(n=>selectedNoteIds.includes(n.id)||n.id===clickedNote.id).map(n=>({id:n.id,originalStartBeat:n.start_beat,originalPitch:n.pitch}));setDraggedNote({mode:'move',idx:clickedNoteIdx,startOffsetBeat:beat-clickedNote.start_beat,startOffsetPitch:pitch-clickedNote.pitch,selectedNotesOffset:selectedNotesOffset});}else{// Clicked in empty space -> Start selection marquee
-setSelectedNoteIds([]);setSelectionMarquee({startBeat:beat,startPitch:pitch,currentBeat:beat,currentPitch:pitch});}};const handleGridMouseMove=e=>{const canvas=canvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const beat=x/pixelsPerBeat;const pitch=127-Math.floor(y/NoteHeight);if(selectionMarquee){const marquee={...selectionMarquee,currentBeat:beat,currentPitch:pitch};setSelectionMarquee(marquee);const minBeat=Math.min(marquee.startBeat,marquee.currentBeat);const maxBeat=Math.max(marquee.startBeat,marquee.currentBeat);const minPitch=Math.min(marquee.startPitch,marquee.currentPitch);const maxPitch=Math.max(marquee.startPitch,marquee.currentPitch);const insideIds=notes.filter(n=>n.start_beat>=minBeat&&n.start_beat<=maxBeat&&n.pitch>=minPitch&&n.pitch<=maxPitch).map(n=>n.id);setSelectedNoteIds(insideIds);return;}if(!draggedNote){let foundIdx=-1;for(let i=0;i<notes.length;i++){const n=notes[i];if(pitch===n.pitch){const noteRightBeat=n.start_beat+n.duration_beats;const pixelDist=Math.abs((noteRightBeat-beat)*pixelsPerBeat);if(pixelDist<6&&beat>=n.start_beat){foundIdx=i;break;}}}if(foundIdx!==-1){canvas.style.cursor='ew-resize';setHoveredResizeIdx(foundIdx);}else{canvas.style.cursor=activeRollTool==='eraser'?'pointer':'crosshair';setHoveredResizeIdx(-1);}return;}if(draggedNote.mode==='resize'){const newDuration=getSnapBeat(Math.max(0.125,beat-draggedNote.originalStart),snapVal);setNotes(prev=>prev.map((n,idx)=>{if(idx!==draggedNote.idx)return n;return{...n,duration_beats:newDuration};}));}else if(draggedNote.mode==='move'){const baseOriginal=draggedNote.selectedNotesOffset.find(o=>o.id===notes[draggedNote.idx].id);const deltaBeat=getSnapBeat(beat-draggedNote.startOffsetBeat,snapVal)-baseOriginal.originalStartBeat;const deltaPitch=Math.round(pitch-draggedNote.startOffsetPitch)-baseOriginal.originalPitch;setNotes(prev=>prev.map(n=>{const offset=draggedNote.selectedNotesOffset.find(o=>o.id===n.id);if(!offset)return n;return{...n,start_beat:getSnapBeat(Math.max(0,offset.originalStartBeat+deltaBeat),snapVal),pitch:Math.max(0,Math.min(127,offset.originalPitch+deltaPitch))};}));}};const handleGridMouseUp=()=>{setDraggedNote(null);setSelectionMarquee(null);};const handleContextMenu=e=>{e.preventDefault();};const handleCCMouseDown=e=>{const canvas=ccCanvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const h=rect.height;const beat=x/pixelsPerBeat;let noteIdx=notes.findIndex(n=>beat>=n.start_beat&&beat<=n.start_beat+n.duration_beats);if(noteIdx===-1){let minDistance=Infinity;notes.forEach((n,idx)=>{const center=n.start_beat+n.duration_beats/2;const dist=Math.abs(center-beat);if(dist<minDistance){minDistance=dist;noteIdx=idx;}});}if(noteIdx!==-1){const val=Math.max(0,Math.min(1,(h-y)/h));setNotes(prev=>prev.map((n,idx)=>{if(idx!==noteIdx)return n;if(ccMode==='pan'){return{...n,pan:(val-0.5)*2.0};}else{return{...n,velocity:val};}}));}};const renderKeybed=()=>{const keys=[];for(let pitch=127;pitch>=0;pitch--){const isBlack=[1,3,6,8,10].includes(pitch%12);const notesArray=['C','C#','D','D#','E','F','F#','G','G#','A','A#','B'];const octave=Math.floor(pitch/12)-1;const label=`${notesArray[pitch%12]}${octave}`;const showLabel=pitch%12===0;keys.push(/*#__PURE__*/React.createElement("div",{key:pitch,style:{height:`${NoteHeight}px`},className:`w-[60px] shrink-0 border-b border-zinc-800 text-[9px] font-bold flex items-center justify-end pr-2 transition ${isBlack?'bg-zinc-950 text-slate-500 border-zinc-900':'bg-white text-zinc-800 border-r border-zinc-400'}`},showLabel&&label));}return keys;};const handleScroll=e=>{if(keybedRef.current){keybedRef.current.scrollTop=e.currentTarget.scrollTop;}if(rulerScrollRef.current){rulerScrollRef.current.scrollLeft=e.currentTarget.scrollLeft;}};const renderBarLabels=()=>{const labels=[];const barsCount=Math.ceil(totalBeats/4);for(let bar=0;bar<barsCount;bar++){const x=bar*4*pixelsPerBeat;labels.push(/*#__PURE__*/React.createElement("div",{key:bar,style:{position:'absolute',left:`${x}px`,top:'4px'},className:"pl-1 border-l border-zinc-700 h-full select-none"},`Bar ${bar}`));}return labels;};return/*#__PURE__*/React.createElement("div",{className:"flex-1 flex overflow-hidden min-h-0 bg-[#1e1e1e] flex-col"},/*#__PURE__*/React.createElement("div",{className:"h-10 bg-[#282828] border-b border-zinc-900 flex items-center justify-between px-4 shrink-0 text-slate-200"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-4"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-yellow-500 uppercase flex items-center gap-1.5"},/*#__PURE__*/React.createElement("i",{"data-lucide":"music",className:"w-3.5 h-3.5"}),st.label),/*#__PURE__*/React.createElement("div",{className:"flex bg-zinc-800 p-0.5 rounded border border-zinc-700 text-xs"},['select','pen','eraser'].map(tool=>/*#__PURE__*/React.createElement("button",{key:tool,onClick:()=>setActiveRollTool(tool),className:`px-2.5 py-1 rounded capitalize ${activeRollTool===tool?'bg-yellow-600 text-white font-bold':'text-zinc-400 hover:text-zinc-200'}`},tool))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1 text-xs"},/*#__PURE__*/React.createElement("span",{className:"text-zinc-500 font-semibold"},"Snap:"),/*#__PURE__*/React.createElement("select",{value:snapVal,onChange:e=>setSnapVal(e.target.value),className:"bg-zinc-800 border border-zinc-700 text-zinc-300 rounded px-1.5 py-0.5 outline-none focus:border-yellow-500"},['free','1','1/2','1/4','1/8','1/16','1/32'].map(v=>/*#__PURE__*/React.createElement("option",{key:v,value:v},v)))),/*#__PURE__*/React.createElement("div",{className:"flex bg-zinc-800 p-0.5 rounded border border-zinc-700 text-xs"},['velocity','pan'].map(mode=>/*#__PURE__*/React.createElement("button",{key:mode,onClick:()=>setCcMode(mode),className:`px-2.5 py-1 rounded capitalize ${ccMode===mode?'bg-purple-900/60 text-purple-300 font-bold border border-purple-700':'text-zinc-400 hover:text-zinc-200'}`},mode)))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1"},/*#__PURE__*/React.createElement("button",{onClick:()=>onSaveNotes(st.id,st.trackId,st.target_id,notes),className:"px-2.5 py-1 bg-emerald-600 hover:bg-emerald-500 text-white rounded text-xs flex items-center gap-1 transition font-semibold"},/*#__PURE__*/React.createElement("i",{"data-lucide":"save",className:"w-3 h-3"}),"Lưu"),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"px-2.5 py-1 bg-zinc-800 hover:bg-zinc-700 text-zinc-300 border border-zinc-700 rounded text-xs flex items-center gap-1 transition"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-3 h-3"}),"Đóng"))),/*#__PURE__*/React.createElement("div",{className:"h-6 bg-[#1a1a1f] border-b border-zinc-900 flex shrink-0"},/*#__PURE__*/React.createElement("div",{className:"w-[60px] bg-[#222222] border-r border-zinc-900 shrink-0"}),/*#__PURE__*/React.createElement("div",{ref:rulerScrollRef,className:"flex-1 overflow-hidden"},/*#__PURE__*/React.createElement("div",{style:{width:`${drawWidth}px`,height:'100%'},className:"relative h-full font-mono text-[9px] text-zinc-500 font-bold"},renderBarLabels()))),/*#__PURE__*/React.createElement("div",{className:"flex-1 flex overflow-hidden min-h-0 relative"},/*#__PURE__*/React.createElement("div",{ref:keybedRef,className:"w-[60px] overflow-hidden flex flex-col border-r border-zinc-900 shrink-0",style:{scrollbarWidth:'none',msOverflowStyle:'none'}},renderKeybed()),/*#__PURE__*/React.createElement("div",{ref:gridScrollRef,onScroll:handleScroll,className:"flex-1 overflow-auto bg-[#141414] min-w-0"},/*#__PURE__*/React.createElement("div",{style:{width:`${drawWidth}px`,height:`${128*NoteHeight}px`},className:"relative"},/*#__PURE__*/React.createElement("canvas",{ref:canvasRef,onMouseDown:handleGridMouseDown,onMouseMove:handleGridMouseMove,onMouseUp:handleGridMouseUp,onMouseLeave:handleGridMouseUp,onContextMenu:handleContextMenu,className:"absolute inset-0 cursor-crosshair"})))),/*#__PURE__*/React.createElement("div",{className:"h-20 bg-[#161616] border-t border-zinc-900 flex shrink-0"},/*#__PURE__*/React.createElement("div",{className:"w-[60px] bg-[#222222] border-r border-zinc-900 flex items-center justify-center text-[10px] text-zinc-500 font-mono shrink-0 font-bold"},ccMode.toUpperCase()),/*#__PURE__*/React.createElement("div",{className:"flex-1 overflow-x-hidden min-w-0"},/*#__PURE__*/React.createElement("div",{style:{width:`${drawWidth}px`,height:'100%'},className:"relative"},/*#__PURE__*/React.createElement("canvas",{ref:ccCanvasRef,onMouseDown:handleCCMouseDown,className:"absolute inset-0 cursor-ns-resize"})))));};const serializeProjectToSchema=(projectId,name,bpmVal,tracksList,subTabsList,sessionTabsList)=>{const secondsPerBar=60.0/parseFloat(bpmVal||120)*4;const mainTracks=(tracksList||[]).map(t=>{let trackType="AUDIO";if(t.sections&&t.sections.length>0)trackType="SECTION";else if(t.midiItems&&t.midiItems.length>0)trackType="MIDI";const items=[];if(trackType==="AUDIO"&&t.clips){t.clips.forEach(c=>{const durationSec=c.buffer?c.buffer.duration:4.0;items.push({id:c.id,name:c.name||"Audio Clip",type:"AUDIO_ITEM",start_bar:c.startTime/secondsPerBar,duration_bars:durationSec/(c.speed||1.0)/secondsPerBar,clip_start_offset_bars:0.0,source_data:{audio_file_url:t.serverFileId?`/static/audio/uploads/${t.serverFileId}`:"",sample_rate:c.buffer?c.buffer.sampleRate:44100,channels:c.buffer?c.buffer.numberOfChannels:2,gain:1.0}});});}else if(trackType==="MIDI"&&t.midiItems){t.midiItems.forEach(m=>{items.push({id:m.id,name:m.name||"MIDI Item",type:"MIDI_ITEM",start_bar:m.startTime/secondsPerBar,duration_bars:m.duration?m.duration/secondsPerBar:4.0,clip_start_offset_bars:0.0,source_data:{total_buffer_bars:m.duration?m.duration/secondsPerBar:8.0,notes:(m.notes||[]).map(n=>({id:n.id||'note_'+Math.random().toString(36).substr(2,9),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(trackType==="SECTION"&&t.sections){t.sections.forEach(s=>{items.push({id:s.id,name:s.name||"Section Item",type:"SECTION_ITEM",start_bar:s.start/secondsPerBar,duration_bars:s.duration/secondsPerBar,clip_start_offset_bars:0.0,source_data:{referenced_section_id:s.sectionId||s.id}});});}return{id:t.id,name:t.name,type:trackType,volume_db:t.volumeDb||0.0,pan:t.pan||0.0,mute:t.muted||false,solo:t.solo||false,items:items};});const sectionStore={};(sessionTabsList||[]).forEach(st=>{const secTracks=(st.tracks||[]).map(t=>{let trackType="AUDIO";if(t.sections&&t.sections.length>0)trackType="SECTION";else if(t.midiItems&&t.midiItems.length>0)trackType="MIDI";return{id:t.id,name:t.name,type:trackType,volume_db:t.volumeDb||0.0,pan:t.pan||0.0,mute:t.muted||false,solo:t.solo||false,items:[]};});sectionStore[st.sectionId]={id:st.sectionId,name:st.name,is_root:false,length_bars:st.length_bars||16.0,auto_compute_length:st.auto_compute_length!==undefined?st.auto_compute_length:true,tracks:secTracks};});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},main_session:{id:"main",name:"MAIN SESSION",is_root:true,length_bars:16.0,auto_compute_length:true,tracks:mainTracks},section_store:sectionStore};};const deserializeProjectFromSchema=schemaObj=>{const bpmVal=schemaObj.metadata?schemaObj.metadata.bpm:120;const secondsPerBar=60.0/bpmVal*4;const restoredTracks=(schemaObj.main_session.tracks||[]).map(t=>{const clips=[];const sections=[];const midiItems=[];(t.items||[]).forEach(item=>{if(item.type==="AUDIO_ITEM"){const src=item.source_data||{};const audioUrl=src.audio_file_url||"";const serverFileId=audioUrl.split("/").pop()||null;clips.push({id:item.id,name:item.name,startTime:item.start_bar*secondsPerBar,speed:1.0});}else if(item.type==="MIDI_ITEM"){const src=item.source_data||{};midiItems.push({id:item.id,name:item.name,startTime:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,notes:src.notes||[]});}else if(item.type==="SECTION_ITEM"){const src=item.source_data||{};sections.push({id:item.id,name:item.name,start:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,sectionId:src.referenced_section_id});}});return{id:t.id,name:t.name,volumeDb:t.volume_db||0.0,pan:t.pan||0.0,muted:t.mute||false,solo:t.solo||false,color:t.id==='1'?'#0f766e':'#1d4ed8',markers:[],serverFileId:t.items&&t.items.find(i=>i.type==="AUDIO_ITEM")?.source_data?.audio_file_url?.split("/").pop()||null,clips:clips,sections:sections,midiItems:midiItems};});const restoredSessionTabs=[];const sectionStore=schemaObj.section_store||{};Object.keys(sectionStore).forEach(secId=>{const secContainer=sectionStore[secId];const secTracks=(secContainer.tracks||[]).map(t=>{return{id:t.id,name:t.name,volumeDb:t.volume_db||0.0,pan:t.pan||0.0,muted:t.mute||false,solo:t.solo||false,clips:[],sections:[],midiItems:[]};});restoredSessionTabs.push({id:'session_'+secId,name:secContainer.name,sectionId:secId,tracks:secTracks,length_bars:secContainer.length_bars||16.0,auto_compute_length:secContainer.auto_compute_length});});return{bpm:bpmVal,tracks:restoredTracks,sessionTabs:restoredSessionTabs};};const App=()=>{// ── State Definitions ──
+// Check if clicking on an existing note
+const clickedNoteIdx=notes.findIndex(n=>{return pitch===n.pitch&&beat>=n.start_beat&&beat<n.start_beat+n.duration_beats;});// Ctrl+click: selection mode (select notes by touching)
+if(e.ctrlKey){if(clickedNoteIdx!==-1){// Ctrl+click on note: toggle selection
+const clickedNote=notes[clickedNoteIdx];if(selectedNoteIds.includes(clickedNote.id)){setSelectedNoteIds(prev=>prev.filter(id=>id!==clickedNote.id));}else{setSelectedNoteIds(prev=>[...prev,clickedNote.id]);}// Start drag to select more notes
+const selectedNotesOffset=notes.filter(n=>selectedNoteIds.includes(n.id)||n.id===notes[clickedNoteIdx].id).map(n=>({id:n.id,originalStartBeat:n.start_beat,originalPitch:n.pitch}));setDraggedNote({mode:'move',idx:clickedNoteIdx,startOffsetBeat:beat-notes[clickedNoteIdx].start_beat,startOffsetPitch:pitch-notes[clickedNoteIdx].pitch,selectedNotesOffset:selectedNotesOffset});}else{// Ctrl+click on empty space: start selection marquee
+setSelectedNoteIds([]);setSelectionMarquee({startBeat:beat,startPitch:pitch,currentBeat:beat,currentPitch:pitch});}return;}// Hovered resize edge
+if(hoveredResizeIdx!==-1){setDraggedNote({mode:'resize',idx:hoveredResizeIdx,originalStart:notes[hoveredResizeIdx].start_beat});return;}if(clickedNoteIdx!==-1){// Click on existing note: drag-move
+const clickedNote=notes[clickedNoteIdx];if(!selectedNoteIds.includes(clickedNote.id)){if(e.shiftKey){setSelectedNoteIds(prev=>[...prev,clickedNote.id]);}else{setSelectedNoteIds([clickedNote.id]);}}const selectedNotesOffset=notes.filter(n=>selectedNoteIds.includes(n.id)||n.id===clickedNote.id).map(n=>({id:n.id,originalStartBeat:n.start_beat,originalPitch:n.pitch}));setDraggedNote({mode:'move',idx:clickedNoteIdx,startOffsetBeat:beat-clickedNote.start_beat,startOffsetPitch:pitch-clickedNote.pitch,selectedNotesOffset:selectedNotesOffset});}else{// Click on empty space: DRAW a new note starting from click position
+const start=getSnapBeat(beat,snapVal);const initialDur=getSnapDuration(snapVal);const noteId='note_'+Date.now()+Math.random().toString(36).substr(2,5);const newNote={id:noteId,pitch:pitch,start_beat:start,duration_beats:initialDur,velocity:0.8,pan:0.0};setNotes(prev=>[...prev,newNote]);setSelectedNoteIds([noteId]);setDraggedNote({mode:'draw',idx:-1,startOffsetBeat:start,startOffsetPitch:pitch,drawNoteId:noteId,drawDuration:initialDur});// Play the note with SoundFont
+if(window.SonicSF){const ctx=getAudioContext();window.SonicSF.playNote(pitch,0.8,300,ctx.currentTime,undefined,null);}}};const handleGridMouseMove=e=>{const canvas=canvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const beat=x/pixelsPerBeat;const pitch=127-Math.floor(y/NoteHeight);if(selectionMarquee){const marquee={...selectionMarquee,currentBeat:beat,currentPitch:pitch};setSelectionMarquee(marquee);const minBeat=Math.min(marquee.startBeat,marquee.currentBeat);const maxBeat=Math.max(marquee.startBeat,marquee.currentBeat);const minPitch=Math.min(marquee.startPitch,marquee.currentPitch);const maxPitch=Math.max(marquee.startPitch,marquee.currentPitch);const insideIds=notes.filter(n=>n.start_beat>=minBeat&&n.start_beat<=maxBeat&&n.pitch>=minPitch&&n.pitch<=maxPitch).map(n=>n.id);setSelectedNoteIds(insideIds);return;}if(!draggedNote){let foundIdx=-1;for(let i=0;i<notes.length;i++){const n=notes[i];if(pitch===n.pitch){const noteRightBeat=n.start_beat+n.duration_beats;const pixelDist=Math.abs((noteRightBeat-beat)*pixelsPerBeat);if(pixelDist<6&&beat>=n.start_beat){foundIdx=i;break;}}}if(foundIdx!==-1){canvas.style.cursor='ew-resize';setHoveredResizeIdx(foundIdx);}else{canvas.style.cursor=activeRollTool==='eraser'?'pointer':'crosshair';setHoveredResizeIdx(-1);}return;}if(draggedNote.mode==='draw'){const rawDur=beat-draggedNote.startOffsetBeat;const newDur=getSnapBeat(Math.max(0.125,rawDur),snapVal);setNotes(prev=>prev.map(n=>{if(n.id!==draggedNote.drawNoteId)return n;return{...n,duration_beats:newDur};}));return;}if(draggedNote.mode==='resize'){const newDuration=getSnapBeat(Math.max(0.125,beat-draggedNote.originalStart),snapVal);setNotes(prev=>prev.map((n,idx)=>{if(idx!==draggedNote.idx)return n;return{...n,duration_beats:newDuration};}));}else if(draggedNote.mode==='move'){const baseOriginal=draggedNote.selectedNotesOffset.find(o=>o.id===notes[draggedNote.idx].id);const deltaBeat=getSnapBeat(beat-draggedNote.startOffsetBeat,snapVal)-baseOriginal.originalStartBeat;const deltaPitch=Math.round(pitch-draggedNote.startOffsetPitch)-baseOriginal.originalPitch;setNotes(prev=>prev.map(n=>{const offset=draggedNote.selectedNotesOffset.find(o=>o.id===n.id);if(!offset)return n;return{...n,start_beat:getSnapBeat(Math.max(0,offset.originalStartBeat+deltaBeat),snapVal),pitch:Math.max(0,Math.min(127,offset.originalPitch+deltaPitch))};}));}};const handleGridMouseUp=()=>{setDraggedNote(null);setSelectionMarquee(null);};const handleContextMenu=e=>{e.preventDefault();};const handleCCMouseDown=e=>{const canvas=ccCanvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const h=rect.height;const beat=x/pixelsPerBeat;let noteIdx=notes.findIndex(n=>beat>=n.start_beat&&beat<=n.start_beat+n.duration_beats);if(noteIdx===-1){let minDistance=Infinity;notes.forEach((n,idx)=>{const center=n.start_beat+n.duration_beats/2;const dist=Math.abs(center-beat);if(dist<minDistance){minDistance=dist;noteIdx=idx;}});}if(noteIdx!==-1){const val=Math.max(0,Math.min(1,(h-y)/h));setNotes(prev=>prev.map((n,idx)=>{if(idx!==noteIdx)return n;if(ccMode==='pan'){return{...n,pan:(val-0.5)*2.0};}else{return{...n,velocity:val};}}));}};const renderKeybed=()=>{const keys=[];for(let pitch=127;pitch>=PITCH_START;pitch--){const isBlack=[1,3,6,8,10].includes(pitch%12);const notesArray=['C','C#','D','D#','E','F','F#','G','G#','A','A#','B'];const octave=Math.floor(pitch/12)-1;const label=`${notesArray[pitch%12]}${octave}`;const showLabel=pitch%12===0;keys.push(/*#__PURE__*/React.createElement("div",{key:pitch,style:{height:`${NoteHeight}px`},className:`w-[60px] shrink-0 border-b border-zinc-800 text-[9px] font-bold flex items-center justify-end pr-2 transition ${isBlack?'bg-zinc-950 text-slate-500 border-zinc-900':'bg-white text-zinc-800 border-r border-zinc-400'}`},showLabel&&label));}return keys;};const handleScroll=e=>{if(keybedRef.current){keybedRef.current.scrollTop=e.currentTarget.scrollTop;}if(rulerScrollRef.current){rulerScrollRef.current.scrollLeft=e.currentTarget.scrollLeft;}};const handleKeybedScroll=e=>{if(gridScrollRef.current){gridScrollRef.current.scrollTop=e.currentTarget.scrollTop;}};const renderBarLabels=()=>{const labels=[];const barsCount=Math.ceil(totalBeats/4);for(let bar=0;bar<barsCount;bar++){const x=bar*4*pixelsPerBeat;labels.push(/*#__PURE__*/React.createElement("div",{key:bar,style:{position:'absolute',left:`${x}px`,top:'4px'},className:"pl-1 border-l border-zinc-700 h-full select-none"},`Bar ${bar}`));}return labels;};const beatSec=60.0/(parseInt(bpm)||120);const playHeadX=(st.currentTime||0)/beatSec*pixelsPerBeat;return React.createElement("div",{className:"flex-1 flex overflow-hidden min-h-0 bg-[#1e1e1e] flex-col"},React.createElement("div",{className:"h-10 bg-[#282828] border-b border-zinc-900 flex items-center justify-between px-4 shrink-0 text-slate-200"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-4"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-yellow-500 uppercase flex items-center gap-1.5"},/*#__PURE__*/React.createElement("i",{"data-lucide":"music",className:"w-3.5 h-3.5"}),st.label),/*#__PURE__*/React.createElement("div",{className:"flex bg-zinc-800 p-0.5 rounded border border-zinc-700 text-xs"},['select','pen','eraser'].map(tool=>/*#__PURE__*/React.createElement("button",{key:tool,onClick:()=>setActiveRollTool(tool),className:`px-2.5 py-1 rounded capitalize ${activeRollTool===tool?'bg-yellow-600 text-white font-bold':'text-zinc-400 hover:text-zinc-200'}`},tool))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1 text-xs"},/*#__PURE__*/React.createElement("span",{className:"text-zinc-500 font-semibold"},"Snap:"),/*#__PURE__*/React.createElement("select",{value:snapVal,onChange:e=>setSnapVal(e.target.value),className:"bg-zinc-800 border border-zinc-700 text-zinc-300 rounded px-1.5 py-0.5 outline-none focus:border-yellow-500"},['free','1','1/2','1/4','1/8','1/16','1/32'].map(v=>/*#__PURE__*/React.createElement("option",{key:v,value:v},v)))),/*#__PURE__*/React.createElement("div",{className:"flex bg-zinc-800 p-0.5 rounded border border-zinc-700 text-xs"},['velocity','pan'].map(mode=>/*#__PURE__*/React.createElement("button",{key:mode,onClick:()=>setCcMode(mode),className:`px-2.5 py-1 rounded capitalize ${ccMode===mode?'bg-purple-900/60 text-purple-300 font-bold border border-purple-700':'text-zinc-400 hover:text-zinc-200'}`},mode)))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-1"},/*#__PURE__*/React.createElement("button",{onClick:()=>onSaveNotes(st.id,st.trackId,st.target_id,notes),className:"px-2.5 py-1 bg-emerald-600 hover:bg-emerald-500 text-white rounded text-xs flex items-center gap-1 transition font-semibold"},/*#__PURE__*/React.createElement("i",{"data-lucide":"save",className:"w-3 h-3"}),"Lưu"),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"px-2.5 py-1 bg-zinc-800 hover:bg-zinc-700 text-zinc-300 border border-zinc-700 rounded text-xs flex items-center gap-1 transition"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-3 h-3"}),"Đóng"))),/*#__PURE__*/React.createElement("div",{className:"h-6 bg-[#1a1a1f] border-b border-zinc-900 flex shrink-0"},/*#__PURE__*/React.createElement("div",{className:"w-[60px] bg-[#222222] border-r border-zinc-900 shrink-0"}),/*#__PURE__*/React.createElement("div",{ref:rulerScrollRef,className:"flex-1 overflow-hidden"},/*#__PURE__*/React.createElement("div",{style:{width:`${drawWidth}px`,height:'100%'},className:"relative h-full font-mono text-[9px] text-zinc-500 font-bold"},renderBarLabels()))),/*#__PURE__*/React.createElement("div",{className:"flex-1 flex overflow-hidden min-h-0 relative"},/*#__PURE__*/React.createElement("div",{ref:keybedRef,onScroll:handleKeybedScroll,className:"w-[60px] overflow-y-auto flex flex-col border-r border-zinc-900 shrink-0",style:{scrollbarWidth:'none',msOverflowStyle:'none'}},renderKeybed()),/*#__PURE__*/React.createElement("div",{ref:gridScrollRef,onScroll:handleScroll,className:"flex-1 overflow-auto bg-[#141414] min-w-0"},/*#__PURE__*/React.createElement("div",{style:{width:`${drawWidth}px`,height:`${(128-PITCH_START)*NoteHeight}px`},className:"relative"},/*#__PURE__*/React.createElement("canvas",{ref:canvasRef,onMouseDown:handleGridMouseDown,onMouseMove:handleGridMouseMove,onMouseUp:handleGridMouseUp,onMouseLeave:handleGridMouseUp,onContextMenu:handleContextMenu,className:"absolute inset-0 cursor-crosshair"})))),/*#__PURE__*/React.createElement("div",{className:"h-20 bg-[#161616] border-t border-zinc-900 flex shrink-0"},/*#__PURE__*/React.createElement("div",{className:"w-[60px] bg-[#222222] border-r border-zinc-900 flex items-center justify-center text-[10px] text-zinc-500 font-mono shrink-0 font-bold"},ccMode.toUpperCase()),/*#__PURE__*/React.createElement("div",{className:"flex-1 overflow-x-hidden min-w-0"},/*#__PURE__*/React.createElement("div",{style:{width:`${drawWidth}px`,height:'100%'},className:"relative"},/*#__PURE__*/React.createElement("canvas",{ref:ccCanvasRef,onMouseDown:handleCCMouseDown,className:"absolute inset-0 cursor-ns-resize"})))));};const serializeProjectToSchema=(projectId,name,bpmVal,tracksList,subTabsList,sessionTabsList)=>{const secondsPerBar=60.0/parseFloat(bpmVal||120)*4;const mainTracks=(tracksList||[]).map(t=>{let trackType="AUDIO";if(t.sections&&t.sections.length>0)trackType="SECTION";else if(t.midiItems&&t.midiItems.length>0)trackType="MIDI";const items=[];if(trackType==="AUDIO"&&t.clips){t.clips.forEach(c=>{const durationSec=c.buffer?c.buffer.duration:4.0;items.push({id:c.id,name:c.name||"Audio Clip",type:"AUDIO_ITEM",start_bar:c.startTime/secondsPerBar,duration_bars:durationSec/(c.speed||1.0)/secondsPerBar,clip_start_offset_bars:0.0,source_data:{audio_file_url:t.serverFileId?`/static/audio/uploads/${t.serverFileId}`:"",sample_rate:c.buffer?c.buffer.sampleRate:44100,channels:c.buffer?c.buffer.numberOfChannels:2,gain:1.0}});});}else if(trackType==="MIDI"&&t.midiItems){t.midiItems.forEach(m=>{items.push({id:m.id,name:m.name||"MIDI Item",type:"MIDI_ITEM",start_bar:m.startTime/secondsPerBar,duration_bars:m.duration?m.duration/secondsPerBar:4.0,clip_start_offset_bars:0.0,source_data:{total_buffer_bars:m.duration?m.duration/secondsPerBar:8.0,notes:(m.notes||[]).map(n=>({id:n.id||'note_'+Math.random().toString(36).substr(2,9),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(trackType==="SECTION"&&t.sections){t.sections.forEach(s=>{items.push({id:s.id,name:s.name||"Section Item",type:"SECTION_ITEM",start_bar:s.start/secondsPerBar,duration_bars:s.duration/secondsPerBar,clip_start_offset_bars:0.0,source_data:{referenced_section_id:s.sectionId||s.id}});});}return{id:t.id,name:t.name,type:trackType,volume_db:t.volumeDb||0.0,pan:t.pan||0.0,mute:t.muted||false,solo:t.solo||false,items:items};});const sectionStore={};(sessionTabsList||[]).forEach(st=>{const secTracks=(st.tracks||[]).map(t=>{let trackType="AUDIO";if(t.sections&&t.sections.length>0)trackType="SECTION";else if(t.midiItems&&t.midiItems.length>0)trackType="MIDI";return{id:t.id,name:t.name,type:trackType,volume_db:t.volumeDb||0.0,pan:t.pan||0.0,mute:t.muted||false,solo:t.solo||false,items:[]};});sectionStore[st.sectionId]={id:st.sectionId,name:st.name,is_root:false,length_bars:st.length_bars||16.0,auto_compute_length:st.auto_compute_length!==undefined?st.auto_compute_length:true,tracks:secTracks};});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},main_session:{id:"main",name:"MAIN SESSION",is_root:true,length_bars:16.0,auto_compute_length:true,tracks:mainTracks},section_store:sectionStore};};const deserializeProjectFromSchema=schemaObj=>{const bpmVal=schemaObj.metadata?schemaObj.metadata.bpm:120;const secondsPerBar=60.0/bpmVal*4;const restoredTracks=(schemaObj.main_session.tracks||[]).map(t=>{const clips=[];const sections=[];const midiItems=[];(t.items||[]).forEach(item=>{if(item.type==="AUDIO_ITEM"){const src=item.source_data||{};const audioUrl=src.audio_file_url||"";const serverFileId=audioUrl.split("/").pop()||null;clips.push({id:item.id,name:item.name,startTime:item.start_bar*secondsPerBar,speed:1.0});}else if(item.type==="MIDI_ITEM"){const src=item.source_data||{};midiItems.push({id:item.id,name:item.name,startTime:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,notes:src.notes||[]});}else if(item.type==="SECTION_ITEM"){const src=item.source_data||{};sections.push({id:item.id,name:item.name,start:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,sectionId:src.referenced_section_id});}});return{id:t.id,name:t.name,volumeDb:t.volume_db||0.0,pan:t.pan||0.0,muted:t.mute||false,solo:t.solo||false,color:t.id==='1'?'#0f766e':'#1d4ed8',markers:[],serverFileId:t.items&&t.items.find(i=>i.type==="AUDIO_ITEM")?.source_data?.audio_file_url?.split("/").pop()||null,clips:clips,sections:sections,midiItems:midiItems};});const restoredSessionTabs=[];const sectionStore=schemaObj.section_store||{};Object.keys(sectionStore).forEach(secId=>{const secContainer=sectionStore[secId];const secTracks=(secContainer.tracks||[]).map(t=>{return{id:t.id,name:t.name,volumeDb:t.volume_db||0.0,pan:t.pan||0.0,muted:t.mute||false,solo:t.solo||false,clips:[],sections:[],midiItems:[]};});restoredSessionTabs.push({id:'session_'+secId,name:secContainer.name,sectionId:secId,tracks:secTracks,length_bars:secContainer.length_bars||16.0,auto_compute_length:secContainer.auto_compute_length});});return{bpm:bpmVal,tracks:restoredTracks,sessionTabs:restoredSessionTabs};};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[draggedClip,setDraggedClip]=useState(null);// { trackId, clickOffset, buffer, name, volume, color }
 const[hoveredTrackId,setHoveredTrackId]=useState(null);const openPanel=id=>{if(id==='export')setShowExportPanel(true);else if(id==='ai')setShowAIPanel(true);else if(id==='python_tools')setShowPythonToolsPanel(true);else if(id==='selection')setShowSelectionPanel(true);};const[instrumentSelectorTrackId,setInstrumentSelectorTrackId]=useState(null);const[instrumentSelectorData,setInstrumentSelectorData]=useState(null);const openInstrumentSelector=trackId=>{setInstrumentSelectorTrackId(trackId);if(!instrumentSelectorData){window.SonicAPI.listPlugins().then(data=>setInstrumentSelectorData(data)).catch(()=>{});}};const closeInstrumentSelector=()=>setInstrumentSelectorTrackId(null);const[synthCategory,setSynthCategory]=useState(null);// 'vst' | 'soundfont'
-const[selectedSoundFontId,setSelectedSoundFontId]=useState(null);const GM_INSTRUMENTS=["Acoustic Grand Piano","Bright Acoustic Piano","Electric Grand Piano","Honky-tonk Piano","Electric Piano 1","Electric Piano 2","Harpsichord","Clavi","Celesta","Glockenspiel","Music Box","Vibraphone","Marimba","Xylophone","Tubular Bells","Dulcimer","Drawbar Organ","Percussive Organ","Rock Organ","Church Organ","Reed Organ","Accordion","Harmonica","Tango Accordion","Acoustic Guitar (nylon)","Acoustic Guitar (steel)","Electric Guitar (jazz)","Electric Guitar (clean)","Electric Guitar (muted)","Overdriven Guitar","Distortion Guitar","Guitar harmonics","Acoustic Bass","Electric Bass (finger)","Electric Bass (pick)","Fretless Bass","Slap Bass 1","Slap Bass 2","Synth Bass 1","Synth Bass 2","Violin","Viola","Cello","Contrabass","Tremolo Strings","Pizzicato Strings","Orchestral Harp","Timpani","String Ensemble 1","String Ensemble 2","Synth Strings 1","Synth Strings 2","Choir Aahs","Voice Oohs","Synth Voice","Orchestra Hit","Trumpet","Trombone","Tuba","Muted Trumpet","French Horn","Brass Section","Synth Brass 1","Synth Brass 2","Soprano Sax","Alto Sax","Tenor Sax","Baritone Sax","Oboe","English Horn","Bassoon","Clarinet","Piccolo","Flute","Recorder","Pan Flute","Blown Bottle","Shakuhachi","Whistle","Ocarina","Lead 1 (square)","Lead 2 (sawtooth)","Lead 3 (calliope)","Lead 4 (chiff)","Lead 5 (charang)","Lead 6 (voice)","Lead 7 (fifths)","Lead 8 (bass+lead)","Pad 1 (new age)","Pad 2 (warm)","Pad 3 (polysynth)","Pad 4 (choir)","Pad 5 (bowed)","Pad 6 (metallic)","Pad 7 (halo)","Pad 8 (sweep)","FX 1 (rain)","FX 2 (soundtrack)","FX 3 (crystal)","FX 4 (atmosphere)","FX 5 (brightness)","FX 6 (goblins)","FX 7 (echoes)","FX 8 (sci-fi)","Sitar","Banjo","Shamisen","Koto","Kalimba","Bag pipe","Fiddle","Shanai","Tinkle Bell","Agogo","Steel Drums","Woodblock","Taiko Drum","Melodic Tom","Synth Drum","Reverse Cymbal","Guitar Fret Noise","Breath Noise","Seashore","Bird Tweet","Telephone Ring","Helicopter","Applause","Gunshot"];const setTrackInstrumentWithProgram=(trackId,instrumentId,programNumber)=>{updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;return{...t,instrumentId,instrumentProgram:programNumber!==undefined?programNumber:undefined};}));setInstrumentSelectorTrackId(null);setSynthCategory(null);setSelectedSoundFontId(null);setTimeout(()=>lucide.createIcons(),50);};const setTrackInstrument=(trackId,instrumentId)=>{if(instrumentId&&instrumentId.startsWith('sf_')){setSelectedSoundFontId(instrumentId);setSynthCategory('soundfont');setInstrumentSelectorTrackId(trackId);}else{setTrackInstrumentWithProgram(trackId,instrumentId);}};const[activeTool,setActiveTool]=useState('select');// 'select' | 'grab' | 'razor'
+const[selectedSoundFontId,setSelectedSoundFontId]=useState(null);const GM_INSTRUMENTS=["Acoustic Grand Piano","Bright Acoustic Piano","Electric Grand Piano","Honky-tonk Piano","Electric Piano 1","Electric Piano 2","Harpsichord","Clavi","Celesta","Glockenspiel","Music Box","Vibraphone","Marimba","Xylophone","Tubular Bells","Dulcimer","Drawbar Organ","Percussive Organ","Rock Organ","Church Organ","Reed Organ","Accordion","Harmonica","Tango Accordion","Acoustic Guitar (nylon)","Acoustic Guitar (steel)","Electric Guitar (jazz)","Electric Guitar (clean)","Electric Guitar (muted)","Overdriven Guitar","Distortion Guitar","Guitar harmonics","Acoustic Bass","Electric Bass (finger)","Electric Bass (pick)","Fretless Bass","Slap Bass 1","Slap Bass 2","Synth Bass 1","Synth Bass 2","Violin","Viola","Cello","Contrabass","Tremolo Strings","Pizzicato Strings","Orchestral Harp","Timpani","String Ensemble 1","String Ensemble 2","Synth Strings 1","Synth Strings 2","Choir Aahs","Voice Oohs","Synth Voice","Orchestra Hit","Trumpet","Trombone","Tuba","Muted Trumpet","French Horn","Brass Section","Synth Brass 1","Synth Brass 2","Soprano Sax","Alto Sax","Tenor Sax","Baritone Sax","Oboe","English Horn","Bassoon","Clarinet","Piccolo","Flute","Recorder","Pan Flute","Blown Bottle","Shakuhachi","Whistle","Ocarina","Lead 1 (square)","Lead 2 (sawtooth)","Lead 3 (calliope)","Lead 4 (chiff)","Lead 5 (charang)","Lead 6 (voice)","Lead 7 (fifths)","Lead 8 (bass+lead)","Pad 1 (new age)","Pad 2 (warm)","Pad 3 (polysynth)","Pad 4 (choir)","Pad 5 (bowed)","Pad 6 (metallic)","Pad 7 (halo)","Pad 8 (sweep)","FX 1 (rain)","FX 2 (soundtrack)","FX 3 (crystal)","FX 4 (atmosphere)","FX 5 (brightness)","FX 6 (goblins)","FX 7 (echoes)","FX 8 (sci-fi)","Sitar","Banjo","Shamisen","Koto","Kalimba","Bag pipe","Fiddle","Shanai","Tinkle Bell","Agogo","Steel Drums","Woodblock","Taiko Drum","Melodic Tom","Synth Drum","Reverse Cymbal","Guitar Fret Noise","Breath Noise","Seashore","Bird Tweet","Telephone Ring","Helicopter","Applause","Gunshot"];const setTrackInstrumentWithProgram=(trackId,instrumentId,programNumber,displayName)=>{updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;return{...t,instrumentId,instrumentProgram:programNumber!==undefined?programNumber:undefined,instrumentName:displayName};}));setInstrumentSelectorTrackId(null);setSynthCategory(null);setSelectedSoundFontId(null);setTimeout(()=>lucide.createIcons(),50);};const setTrackInstrument=(trackId,instrumentId,displayName)=>{if(instrumentId&&instrumentId.startsWith('sf_')){setSelectedSoundFontId(instrumentId);setSynthCategory('soundfont');setInstrumentSelectorTrackId(trackId);}else{setTrackInstrumentWithProgram(trackId,instrumentId,undefined,displayName);}};const[activeTool,setActiveTool]=useState('select');// 'select' | 'grab' | 'razor'
 const[snapValue,setSnapValue]=useState('free');// 'free', '1', '1/2', '1/4', '1/8', '1/16', '1/32'
 const snapTime=(time,snapVal,bpmVal)=>{if(snapVal==='free')return time;const beatDuration=60/parseFloat(bpmVal||120);let divisor=1;if(snapVal==='1')divisor=1;else if(snapVal==='1/2')divisor=0.5;else if(snapVal==='1/4')divisor=0.25;else if(snapVal==='1/8')divisor=0.125;else if(snapVal==='1/16')divisor=0.0625;else if(snapVal==='1/32')divisor=0.03125;const gridSpacing=beatDuration*divisor;return Math.round(time/gridSpacing)*gridSpacing;};const snapValueRef=useRef(snapValue);snapValueRef.current=snapValue;const bpmRef=useRef(bpm);bpmRef.current=bpm;// BMP for Tempo Track - LOOP_EDITOR_2.md §6
 const[selectedTrackId,setSelectedTrackId]=useState('1');const[currentTime,setCurrentTime]=useState(0);const[isPlaying,setIsPlaying]=useState(false);const[selectionStart,setSelectionStart]=useState(null);const[selectionEnd,setSelectionEnd]=useState(null);const selectionRef=useRef({start:null,end:null});selectionRef.current={start:selectionStart,end:selectionEnd};const[selectionMode,setSelectionMode]=useState(null);// 'global' (from ruler) | 'local' (from track)
@@ -169,7 +183,7 @@ if(e.key===' '||e.code==='Space'){e.preventDefault();if(handlePlayPauseRef.curre
 const curTabId=activeTabRef.current;if(ctrl&&alt&&e.key==='n'){e.preventDefault();handleSubTabNormalize(curTabId);return;}if(e.key==='f'||e.key==='F'){e.preventDefault();handleSubTabFade(curTabId,'in');return;}if(e.key==='g'||e.key==='G'){e.preventDefault();handleSubTabFade(curTabId,'out');return;}if(ctrl&&e.key==='l'){e.preventDefault();handleSubTabLoop(curTabId,4);return;}if(e.key==='v'||e.key==='V'){e.preventDefault();const val=prompt("Nhập Gain điều chỉnh (dB):","0");if(val)handleSubTabGain(curTabId,parseFloat(val)||0);return;}if(ctrl&&e.key==='x'){e.preventDefault();handleSubTabCut(curTabId);return;}if(ctrl&&e.key==='c'){e.preventDefault();handleSubTabCopy(curTabId);return;}if(ctrl&&e.key==='v'){e.preventDefault();handleSubTabPaste(curTabId);return;}if(e.key==='Delete'||e.key==='Backspace'||e.key==='Del'){e.preventDefault();if(subTabSelectedNodeTimeRef.current!==null){const selTime=subTabSelectedNodeTimeRef.current;setSubTabs(prev=>prev.map(s=>{if(s.id!==curTabId)return s;const curNodes=s.graphMode==='pan'?s.panningNodes||[]:s.volumeNodes||[];const updated=curNodes.filter(n=>n.time!==selTime);return{...s,[s.graphMode==='pan'?'panningNodes':'volumeNodes']:updated};}));setSubTabSelectedNodeTime(null);}else{handleSubTabDelete(curTabId);}return;}return;}if(ctrl&&e.key==='z'&&!e.shiftKey){e.preventDefault();handleUndoRef.current();return;}if(ctrl&&(e.key==='y'||e.key==='z'&&e.shiftKey)){e.preventDefault();handleRedoRef.current();return;}if(ctrl&&!alt&&e.key==='o'){e.preventDefault();handleImportSFS();return;}if(ctrl&&!alt&&e.key==='n'){e.preventDefault();setTracks([{id:'1',name:'Track 01',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#0f766e',markers:[],serverFileId:null},{id:'2',name:'Track 02',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#1d4ed8',markers:[],serverFileId:null}]);setSelectedTrackId('1');showToast('New project created','info');return;}if(ctrl&&!alt&&e.key==='s'){e.preventDefault();handleExportSFS();return;}if(ctrl&&alt&&e.key==='s'||ctrl&&e.shiftKey&&e.key==='s'){e.preventDefault();handleExportSFS();return;}if(ctrl&&!alt&&e.key==='i'){e.preventDefault();addNewTrack();return;}if(ctrl&&alt&&e.key==='i'){e.preventDefault();showToast('Import audio','info');return;}if(ctrl&&!alt&&e.key==='e'){e.preventDefault();openTempTab();return;}if(ctrl&&!alt&&e.key==='m'){e.preventDefault();handleMergeTracks();return;}if(ctrl&&!alt&&e.key==='c'){e.preventDefault();handleCopyTrack();return;}if(ctrl&&!alt&&e.key==='x'){e.preventDefault();handleCutTrack();return;}if(ctrl&&!alt&&e.key==='v'){e.preventDefault();handlePasteTrack();return;}if(e.key==='Delete'||e.key==='Backspace'||e.key==='Del'){const selClip=selectedClipIdRef.current;if(selClip){e.preventDefault();const{trackId,clipId}=selClip;setTracks(prev=>{const track=prev.find(t=>t.id===trackId);if(!track)return prev;const beforeSnap=captureTrackSnapshotRef.current?captureTrackSnapshotRef.current(trackId):null;const updatedClips=(track.clips||[]).filter(c=>c.id!==clipId);const updatedTracks=prev.map(t=>{if(t.id===trackId){return{...t,clips:updatedClips,buffer:updatedClips.length>0?updatedClips[0].buffer:null,startTime:updatedClips.length>0?updatedClips[0].startTime:0,name:updatedClips.length>0?updatedClips[0].name:`Track ${t.id}`};}return t;});setTimeout(()=>{const afterSnap=captureTrackSnapshotRef.current?captureTrackSnapshotRef.current(trackId):null;pushAction('DELETE_CLIP',trackId,beforeSnap,afterSnap);},50);return updatedTracks;});setSelectedClipId(null);showToast('Đã xóa clip.','info');return;}else{e.preventDefault();handleDeleteTrack();return;}}if(ctrl&&!alt&&e.key==='s'){e.preventDefault();handleSaveProject();return;}if(!ctrl&&!alt&&e.key==='s'){e.preventDefault();handleSplitTrack(selectedTrackId);return;}};window.addEventListener('keydown',handler);return()=>window.removeEventListener('keydown',handler);},[]);// ── Temp Tab: draw isolated waveform ──
 useEffect(()=>{if(!tempTabActive||!tempTabBuffer||!tempTabCanvasRef.current)return;const canvas=tempTabCanvasRef.current;const ctx=canvas.getContext('2d');const dpr=window.devicePixelRatio||1;const rect=canvas.getBoundingClientRect();canvas.width=rect.width*dpr;canvas.height=rect.height*dpr;ctx.scale(dpr,dpr);const w=rect.width;const h=rect.height;ctx.fillStyle='#181818';ctx.fillRect(0,0,w,h);const data=tempTabBuffer.getChannelData(0);const sr=tempTabBuffer.sampleRate;const totalSamples=data.length;if(totalSamples===0)return;ctx.strokeStyle='#6ee7b7';ctx.lineWidth=1;for(let px=0;px<w;px++){const startSample=Math.floor(px/w*totalSamples);const endSample=Math.floor((px+1)/w*totalSamples);let maxVal=0;for(let i=startSample;i<endSample&&i<totalSamples;i++){const abs=Math.abs(data[i]);if(abs>maxVal)maxVal=abs;}const mid=h/2;const peakHeight=maxVal*(h*0.4);ctx.beginPath();ctx.moveTo(px,mid-peakHeight);ctx.lineTo(px,mid+peakHeight);ctx.stroke();}},[tempTabActive,tempTabBuffer]);// ── Sub Tab: open as new tab instead of modal (LOOP_EDITOR_2.md §1) ──
 const openTempTab=()=>{const useLocal=selectionMode==='local'&&localSelectionTrackId;const trackId=useLocal?localSelectionTrackId:selectedTrackId;const t=tracks.find(x=>x.id===trackId);if(!t||!t.buffer){showToast('Vui lòng chọn track có dữ liệu âm thanh.','warning');return;}if(selLeft===null||selRight===null||selRight<=selLeft){showToast('Vui lòng chọn một khoảng thời gian trên sóng âm.','warning');return;}// Check if a subtab for this track+range already exists
-const existing=subTabs.find(s=>s.trackId===trackId&&s.startTime===selLeft&&s.endTime===selRight);if(existing){setActiveTab(existing.id);showToast(`Sub Tab already open.`,'info');return;}const sr=t.buffer.sampleRate;const trackStart=t.startTime||0;const relSelLeft=Math.max(0,selLeft-trackStart);const relSelRight=Math.max(0,selRight-trackStart);const startSample=Math.max(0,Math.floor(relSelLeft*sr));const endSample=Math.min(t.buffer.length,Math.floor(relSelRight*sr));const len=endSample-startSample;if(len<100){showToast('Khoảng chọn quá ngắn.','warning');return;}const ctx=getAudioContext();const numChannels=t.buffer.numberOfChannels||1;const subBuffer=ctx.createBuffer(numChannels,len,sr);for(let c=0;c<numChannels;c++){subBuffer.copyToChannel(t.buffer.getChannelData(c).subarray(startSample,endSample),c);}const subChannelInfo=window.SonicAudio.analyzeAudioBufferChannels(subBuffer);const tabId='subtab_'+Date.now();const tabLabel=`Edit_${t.name.replace('.wav','').slice(0,10)}_${selLeft.toFixed(1)}s`;setSubTabs(prev=>[...prev,{id:tabId,label:tabLabel,trackId:trackId,startTime:selLeft,endTime:selRight,buffer:subBuffer,channelInfo:subChannelInfo,effects:{reverse:false,gainDb:0,fadeInMs:0,fadeOutMs:0,normalizeDb:0,pitch:0,speedStretch:100},currentTime:0,selectionStart:null,selectionEnd:null,isPlaying:false,speed:1.0,volumeNodes:[],panningNodes:[],fadeInLen:0,fadeOutLen:0,graphMode:null,isLooping:false,loopCount:0}]);setActiveTab(tabId);};const handleEditClipInSubTab=(trackId,clipId)=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return;const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default_'+track.id,buffer:track.buffer,startTime:track.startTime||0,name:track.name}]:[];const clip=clips.find(c=>c.id===clipId||clipId==='default'&&c.id==='default_'+trackId);if(!clip||!clip.buffer)return;const resolvedClipId=clip.id==='default'?'default_'+trackId:clip.id;const existing=subTabs.find(s=>s.clipId===resolvedClipId&&s.trackId===trackId);if(existing){setActiveTab(existing.id);showToast(`Sub Tab for "${clip.name}" already open.`,'info');return;}const sr=clip.buffer.sampleRate;const len=clip.buffer.length;const numChannels=clip.buffer.numberOfChannels||1;const ctx=getAudioContext();const subBuffer=ctx.createBuffer(numChannels,len,sr);for(let c=0;c<numChannels;c++){subBuffer.copyToChannel(clip.buffer.getChannelData(c),c);}const subChannelInfo=window.SonicAudio.analyzeAudioBufferChannels(subBuffer);const tabId='subtab_'+Date.now();const tabLabel=`Edit_${clip.name.replace('.wav','').slice(0,10)}`;setSubTabs(prev=>[...prev,{id:tabId,label:tabLabel,trackId:trackId,clipId:resolvedClipId,startTime:clip.startTime,endTime:clip.startTime+clip.buffer.duration,buffer:subBuffer,channelInfo:subChannelInfo,effects:{reverse:false,gainDb:0,fadeInMs:0,fadeOutMs:0,normalizeDb:0,pitch:0,speedStretch:100},currentTime:0,selectionStart:null,selectionEnd:null,isPlaying:false,speed:1.0,volumeNodes:[],panningNodes:[],fadeInLen:0,fadeOutLen:0,graphMode:null,isLooping:false,loopCount:0}]);setActiveTab(tabId);};const handleEditMidiInTab=(trackId,midiItemId)=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return;const midiItem=(track.midiItems||[]).find(m=>m.id===midiItemId);if(!midiItem)return;const existing=subTabs.find(s=>s.type==='PIANO_ROLL'&&s.target_id===midiItemId);if(existing){setActiveTab(existing.id);showToast('Piano Roll cho nốt MIDI đã được mở.','info');return;}const tabId='midi_'+Date.now();const tabLabel=`Piano Roll: ${midiItem.name||'MIDI'}`;const newTab={id:tabId,label:tabLabel,type:'PIANO_ROLL',trackId:trackId,target_id:midiItemId,parent_tab_id:activeTab==='main'?null:activeTab,notes:midiItem.notes||[],duration:midiItem.duration||4,viewport_start_bar:0.0,viewport_bar_width:8.0,scroll_y_pitch:60,snap_resolution:snapValue||"1/16",note_selection:[]};setSubTabs(prev=>[...prev,newTab]);setActiveTab(tabId);};const handleUpdateMidiNotes=(tabId,notes)=>{setSubTabs(prev=>prev.map(s=>s.id===tabId?{...s,notes:notes}:s));};const handleSaveMidiNotes=(tabId,trackId,midiItemId,updatedNotes)=>{const isSectionTrack=sessionTabs.some(s=>s.tracks.some(t=>t.id===trackId));if(isSectionTrack){setSessionTabs(prev=>prev.map(s=>{if(!s.tracks.some(t=>t.id===trackId))return s;return{...s,tracks:s.tracks.map(t=>{if(t.id!==trackId)return t;return{...t,midiItems:(t.midiItems||[]).map(m=>{if(m.id!==midiItemId)return m;return{...m,notes:updatedNotes};})};})};}));}else{setTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;return{...t,midiItems:(t.midiItems||[]).map(m=>{if(m.id!==midiItemId)return m;return{...m,notes:updatedNotes};})};}));}showToast('Đã lưu các chỉnh sửa nốt MIDI vào item cha!','success');};const handleSaveSectionTab=tabId=>{const tab=sessionTabs.find(s=>s.id===tabId);if(!tab)return;const bpmVal=parseInt(bpm)||120;const secondsPerBeat=60.0/bpmVal;const secondsPerBar=secondsPerBeat*4;const durationSec=(tab.length_bars||16.0)*secondsPerBar;setTracks(prev=>prev.map(t=>{if(!t.sections||t.sections.length===0)return t;return{...t,sections:t.sections.map(s=>{if(s.sectionId!==tab.sectionId)return s;return{...s,name:tab.name,duration:durationSec};})};}));showToast(`Đã lưu nội dung Section "${tab.name}" vào Main Session!`,'success');};// ── Double-click/Edit Section: open Main Session in new tab ──
+const existing=subTabs.find(s=>s.trackId===trackId&&s.startTime===selLeft&&s.endTime===selRight);if(existing){setActiveTab(existing.id);showToast(`Sub Tab already open.`,'info');return;}const sr=t.buffer.sampleRate;const trackStart=t.startTime||0;const relSelLeft=Math.max(0,selLeft-trackStart);const relSelRight=Math.max(0,selRight-trackStart);const startSample=Math.max(0,Math.floor(relSelLeft*sr));const endSample=Math.min(t.buffer.length,Math.floor(relSelRight*sr));const len=endSample-startSample;if(len<100){showToast('Khoảng chọn quá ngắn.','warning');return;}const ctx=getAudioContext();const numChannels=t.buffer.numberOfChannels||1;const subBuffer=ctx.createBuffer(numChannels,len,sr);for(let c=0;c<numChannels;c++){subBuffer.copyToChannel(t.buffer.getChannelData(c).subarray(startSample,endSample),c);}const subChannelInfo=window.SonicAudio.analyzeAudioBufferChannels(subBuffer);const tabId='subtab_'+Date.now();const tabLabel=`Edit_${t.name.replace('.wav','').slice(0,10)}_${selLeft.toFixed(1)}s`;setSubTabs(prev=>[...prev,{id:tabId,label:tabLabel,trackId:trackId,startTime:selLeft,endTime:selRight,buffer:subBuffer,channelInfo:subChannelInfo,effects:{reverse:false,gainDb:0,fadeInMs:0,fadeOutMs:0,normalizeDb:0,pitch:0,speedStretch:100},currentTime:0,selectionStart:null,selectionEnd:null,isPlaying:false,speed:1.0,volumeNodes:[],panningNodes:[],fadeInLen:0,fadeOutLen:0,graphMode:null,isLooping:false,loopCount:0}]);setActiveTab(tabId);};const handleEditClipInSubTab=(trackId,clipId)=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return;const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default_'+track.id,buffer:track.buffer,startTime:track.startTime||0,name:track.name}]:[];const clip=clips.find(c=>c.id===clipId||clipId==='default'&&c.id==='default_'+trackId);if(!clip||!clip.buffer)return;const resolvedClipId=clip.id==='default'?'default_'+trackId:clip.id;const existing=subTabs.find(s=>s.clipId===resolvedClipId&&s.trackId===trackId);if(existing){setActiveTab(existing.id);showToast(`Sub Tab for "${clip.name}" already open.`,'info');return;}const sr=clip.buffer.sampleRate;const len=clip.buffer.length;const numChannels=clip.buffer.numberOfChannels||1;const ctx=getAudioContext();const subBuffer=ctx.createBuffer(numChannels,len,sr);for(let c=0;c<numChannels;c++){subBuffer.copyToChannel(clip.buffer.getChannelData(c),c);}const subChannelInfo=window.SonicAudio.analyzeAudioBufferChannels(subBuffer);const tabId='subtab_'+Date.now();const tabLabel=`Edit_${clip.name.replace('.wav','').slice(0,10)}`;setSubTabs(prev=>[...prev,{id:tabId,label:tabLabel,trackId:trackId,clipId:resolvedClipId,startTime:clip.startTime,endTime:clip.startTime+clip.buffer.duration,buffer:subBuffer,channelInfo:subChannelInfo,effects:{reverse:false,gainDb:0,fadeInMs:0,fadeOutMs:0,normalizeDb:0,pitch:0,speedStretch:100},currentTime:0,selectionStart:null,selectionEnd:null,isPlaying:false,speed:1.0,volumeNodes:[],panningNodes:[],fadeInLen:0,fadeOutLen:0,graphMode:null,isLooping:false,loopCount:0}]);setActiveTab(tabId);};const handleEditMidiInTab=(trackId,midiItemId)=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return;const midiItem=(track.midiItems||[]).find(m=>m.id===midiItemId);if(!midiItem)return;const existing=subTabs.find(s=>s.type==='PIANO_ROLL'&&s.target_id===midiItemId);if(existing){setActiveTab(existing.id);showToast('Piano Roll cho nốt MIDI đã được mở.','info');return;}const tabId='midi_'+Date.now();const tabLabel=`Piano Roll: ${midiItem.name||'MIDI'}`;const ctx=getAudioContext();const silentBuffer=ctx.createBuffer(1,128,ctx.sampleRate);const newTab={id:tabId,label:tabLabel,type:'PIANO_ROLL',trackId:trackId,target_id:midiItemId,parent_tab_id:activeTab==='main'?null:activeTab,notes:midiItem.notes||[],duration:midiItem.duration||4,buffer:silentBuffer,currentTime:0,isPlaying:false,selectionStart:null,selectionEnd:null,viewport_start_bar:0.0,viewport_bar_width:8.0,scroll_y_pitch:60,snap_resolution:snapValue||"1/16",note_selection:[]};setSubTabs(prev=>[...prev,newTab]);setActiveTab(tabId);};const handleUpdateMidiNotes=(tabId,notes)=>{setSubTabs(prev=>prev.map(s=>s.id===tabId?{...s,notes:notes}:s));};const handleSaveMidiNotes=(tabId,trackId,midiItemId,updatedNotes)=>{const isSectionTrack=sessionTabs.some(s=>s.tracks.some(t=>t.id===trackId));if(isSectionTrack){setSessionTabs(prev=>prev.map(s=>{if(!s.tracks.some(t=>t.id===trackId))return s;return{...s,tracks:s.tracks.map(t=>{if(t.id!==trackId)return t;return{...t,midiItems:(t.midiItems||[]).map(m=>{if(m.id!==midiItemId)return m;return{...m,notes:updatedNotes};})};})};}));}else{setTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;return{...t,midiItems:(t.midiItems||[]).map(m=>{if(m.id!==midiItemId)return m;return{...m,notes:updatedNotes};})};}));}showToast('Đã lưu các chỉnh sửa nốt MIDI vào item cha!','success');};const handleSaveSectionTab=tabId=>{const tab=sessionTabs.find(s=>s.id===tabId);if(!tab)return;const bpmVal=parseInt(bpm)||120;const secondsPerBeat=60.0/bpmVal;const secondsPerBar=secondsPerBeat*4;const durationSec=(tab.length_bars||16.0)*secondsPerBar;setTracks(prev=>prev.map(t=>{if(!t.sections||t.sections.length===0)return t;return{...t,sections:t.sections.map(s=>{if(s.sectionId!==tab.sectionId)return s;return{...s,name:tab.name,duration:durationSec};})};}));showToast(`Đã lưu nội dung Section "${tab.name}" vào Main Session!`,'success');};// ── Double-click/Edit Section: open Main Session in new tab ──
 const handleEditSectionInTab=(trackId,sectionId)=>{const track=tracks.find(t=>t.id===trackId);if(!track)return;const section=(track.sections||[]).find(s=>s.id===sectionId);if(!section)return;const existing=sessionTabs.find(s=>s.sectionId===sectionId);if(existing){setActiveTab(existing.id);showToast(`Tab "${section.name}" already open.`,'info');return;}const tabId='session_'+Date.now();const tabName=section.name||'Section';const clonedTracks=tracks.map(t=>({...t,clips:[],sections:[],midiItems:[],markers:[],isArmed:false,monitoringEnabled:true}));setSessionTabs(prev=>[...prev,{id:tabId,name:tabName,sectionId:sectionId,tracks:clonedTracks}]);setActiveTab(tabId);};// ── Sub Tab: apply effects & merge back (LOOP_EDITOR_2.md §1.2) ──
 const applySubTab=tabId=>{const subTab=subTabs.find(s=>s.id===tabId);if(!subTab||!subTab.buffer)return;const track=activeTracks.find(t=>t.id===subTab.trackId);if(!track||!track.buffer)return;const beforeSnap=captureTrackSnapshot(subTab.trackId);// Clone buffer and apply effects
 const ctx=getAudioContext();const sr=subTab.buffer.sampleRate;const eff=subTab.buffer.getChannelData(0);let resultBuffer=ctx.createBuffer(1,eff.length,sr);let resultData=resultBuffer.getChannelData(0);resultData.set(eff);// Apply effects inline
@@ -222,17 +236,22 @@ while(true){const beatNum=nextMetronomeBeatRef.current;const elapsedBeats=beatNu
 const now=Date.now();if(now-lastTempCompileTimeRef.current>200){lastTempCompileTimeRef.current=now;// Audio preview
 for(let trackId in recordingPCMDataRef.current){const data=recordingPCMDataRef.current[trackId];if(data&&data.length>0){const tempBuf=audioCtx.createBuffer(1,data.length,audioCtx.sampleRate);tempBuf.getChannelData(0).set(data);setRecTempAudioBuffer(tempBuf);}}// MIDI preview
 let combinedNotes=[];const armedTracks=activeTracksRef.current.filter(t=>t.isArmed);for(let track of armedTracks){const midiRec=activeMIDIRecordersRef.current[track.id];if(midiRec){const currentBeat=(audioCtx.currentTime-midiRec.recStartAudioTime-midiRec.latencyCompSec)/secondsPerBeat;const notes=[...midiRec.recordedNotes,...Array.from(midiRec.activeNotes.values()).map(n=>({...n,duration_beats:currentBeat-n.start_beat}))];combinedNotes=combinedNotes.concat(notes);}}if(combinedNotes.length>0||armedTracks.some(t=>activeMIDIRecordersRef.current[t.id])){setRecTempMidiNotes(combinedNotes);setCanvasRedrawCount(n=>n+1);}}}const isSubTab=subTabsRef.current.some(sub=>sub.id===activeTabRef.current);if(isSubTab){const st=subTabsRef.current.find(s=>s.id===activeTabRef.current);if(!st||!st.isPlaying||!st.buffer)return;const context=getAudioContext();const speedFactor=st.speed||1.0;const elapsed=context.currentTime-startAudioTimeRef.current;const wallTime=startOffsetTimeRef.current+elapsed;const bufferPos=startBufferOffsetRef.current+elapsed*speedFactor;// Loop sub-tab selection (bufferPos is buffer-time)
-if(st.selectionStart!==null&&st.selectionEnd!==null&&st.selectionStart!==st.selectionEnd){const start=Math.min(st.selectionStart,st.selectionEnd);const end=Math.max(st.selectionStart,st.selectionEnd);if(bufferPos>=end){stopAllPlayback();setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:wallTime,isPlaying:true}:s));startSubTabPlayback(st,wallTime);animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);return;}}if(bufferPos>=st.buffer.duration){stopAllPlayback();if(isLoopingSelection){setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:0,isPlaying:true}:s));startSubTabPlayback(st,0);animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);}else{setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:0,isPlaying:false}:s));}return;}setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:wallTime}:s));animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);return;}if(!isPlaying)return;const context=getAudioContext();const elapsed=context.currentTime-startAudioTimeRef.current;const updatedTime=startOffsetTimeRef.current+elapsed;// Selection Loop - LOOP_MAKER.md + LOOP_EDITOR_2.md §4.2
+if(st.selectionStart!==null&&st.selectionEnd!==null&&st.selectionStart!==st.selectionEnd){const start=Math.min(st.selectionStart,st.selectionEnd);const end=Math.max(st.selectionStart,st.selectionEnd);if(bufferPos>=end){stopAllPlayback();setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:wallTime,isPlaying:true}:s));startSubTabPlayback(st,wallTime);animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);return;}}const effectiveDuration=st.type==='PIANO_ROLL'?(()=>{const notes=st.notes||[];const bpmVal=parseInt(bpmRef?.current||bpm)||120;const beatSec=60.0/bpmVal;let maxEnd=0;notes.forEach(n=>{const end=(n.start_beat||0)+(n.duration_beats||1);if(end>maxEnd)maxEnd=end;});return maxEnd*beatSec+1.0;})():st.buffer.duration;if(bufferPos>=effectiveDuration){stopAllPlayback();if(isLoopingSelection){setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:0,isPlaying:true}:s));startSubTabPlayback(st,0);animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);}else{setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:0,isPlaying:false}:s));}return;}setSubTabs(prev=>prev.map(s=>s.id===activeTabRef.current?{...s,currentTime:wallTime}:s));animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);return;}if(!isPlaying)return;const context=getAudioContext();const elapsed=context.currentTime-startAudioTimeRef.current;const updatedTime=startOffsetTimeRef.current+elapsed;// Selection Loop - LOOP_MAKER.md + LOOP_EDITOR_2.md §4.2
 // If selection cleared by user, play linearly (don't loop)
 if(!selectionCleared&&isLoopingSelection&&selLeft!==null&&selRight!==null){if(selRight>selLeft&&updatedTime>=selRight){if(soloedTrackId!==null||selectionMode==='local'){stopAllPlayback();startOffsetTimeRef.current=selLeft;startAudioTimeRef.current=context.currentTime;const soloTid=soloedTrackId!==null?soloedTrackId:localSelectionTrackId;startLocalTrackPlayback(soloTid,selLeft);setCurrentTime(selLeft);setIsPlaying(true);}else{stopAllPlayback();startOffsetTimeRef.current=selLeft;startAudioTimeRef.current=context.currentTime;startTrackPlayback(selLeft);setCurrentTime(selLeft);setIsPlaying(true);}animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);return;}}if(updatedTime>=maxDurationRef.current){if(recordingStateRef.current==='RECORDING'){setCurrentTime(updatedTime);animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);return;}if(isLoopingSelection){stopAllPlayback();startOffsetTimeRef.current=0;startAudioTimeRef.current=context.currentTime;startTrackPlayback(0);setCurrentTime(0);setIsPlaying(true);animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);return;}stopAllPlayback();setCurrentTime(0);return;}setCurrentTime(updatedTime);animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);};useEffect(()=>{if(isPlaying||subTabs.some(s=>s.isPlaying)){animationFrameIdRef.current=requestAnimationFrame(updatePlayhead);}else{cancelAnimationFrame(animationFrameIdRef.current);}return()=>cancelAnimationFrame(animationFrameIdRef.current);},[isPlaying,subTabs,isLoopingSelection,selLeft,selRight,selectionMode,localSelectionTrackId,selectionCleared,activeTab]);// ── Playback ──
 const startTrackPlayback=offsetTime=>{const context=getAudioContext();const hasSolo=tracks.some(t=>t.solo)||soloedTrackId!==null;tracks.forEach(track=>{const isPlayable=hasSolo?track.id===soloedTrackId||track.solo:!track.muted;if(!isPlayable)return;// Create persistent gain & panner per track for real-time control
 const gainNode=context.createGain();const volDb=track.volumeDb??0;const volLinear=volDb<=-50?0:Math.pow(10,volDb/20);gainNode.gain.setValueAtTime(volLinear,context.currentTime);const pannerNode=context.createStereoPanner();pannerNode.pan.setValueAtTime((track.pan??0)/100,context.currentTime);pannerNode.connect(context.destination);activeTrackNodesRef.current[track.id]={gainNode,pannerNode};const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default',buffer:track.buffer,startTime:track.startTime||0,name:track.name,speed:track.speed||1.0}]:[];clips.forEach(clip=>{if(!clip.buffer)return;const source=context.createBufferSource();source.buffer=clip.buffer;source.playbackRate.value=clip.speed||1.0;source.connect(gainNode);gainNode.connect(pannerNode);const clipStart=clip.startTime||0;const clipDuration=clip.buffer.duration/(clip.speed||1.0);const clipEnd=clipStart+clipDuration;if(offsetTime<clipStart){const delay=clipStart-offsetTime;source.start(context.currentTime+delay,0);activeSourcesRef.current.push(source);}else if(offsetTime<clipEnd){const playOffset=offsetTime-clipStart;source.start(context.currentTime,playOffset*(clip.speed||1.0));activeSourcesRef.current.push(source);}});// MIDI items playback
 const midiItems=track.midiItems||[];if((track.type==='MIDI'||midiItems.length>0)&&window.SonicSF){const bpmVal=parseInt(bpm)||120;const secondsPerBeat=60.0/bpmVal;midiItems.forEach(item=>{const notes=item.notes||[];notes.forEach(note=>{// note start/duration is in beats (for MIDI items)
-const noteStartSec=item.startTime+(note.start_beat||0)*secondsPerBeat;const noteDurSec=(note.duration_beats||1)*secondsPerBeat;const noteEndSec=noteStartSec+noteDurSec;if(offsetTime<noteEndSec){const durationMs=noteDurSec*1000;const program=track.instrumentProgram!==undefined?track.instrumentProgram:0;if(offsetTime<noteStartSec){const delay=noteStartSec-offsetTime;const startTime=context.currentTime+delay;window.SonicSF.playNote(note.pitch||60,note.velocity||0.8,durationMs,startTime,program,gainNode);}else{const playOffset=offsetTime-noteStartSec;const remainingDurMs=(noteEndSec-offsetTime)*1000;window.SonicSF.playNote(note.pitch||60,note.velocity||0.8,remainingDurMs,context.currentTime,program,gainNode);}}});});}});};// Solo playback for Local Selection Loop (LOOP_MAKER.md §2.2)
+const noteStartSec=item.startTime+(note.start_beat||0)*secondsPerBeat;const noteDurSec=(note.duration_beats||1)*secondsPerBeat;const noteEndSec=noteStartSec+noteDurSec;if(offsetTime<noteEndSec){const durationMs=noteDurSec*1000;const program=track.instrumentProgram!==undefined?track.instrumentProgram:0;if(offsetTime<noteStartSec){const delay=noteStartSec-offsetTime;const startTime=context.currentTime+delay;window.SonicSF.playNote(note.pitch||60,note.velocity||0.8,durationMs,startTime,program,gainNode);}else{const playOffset=offsetTime-noteStartSec;const remainingDurMs=(noteEndSec-offsetTime)*1000;window.SonicSF.playNote(note.pitch||60,note.velocity||0.8,remainingDurMs,context.currentTime,program,gainNode);}}});});}// If track has instrumentId set but no MIDI items, create scheduled oscillators
+if(track.instrumentId&&midiItems.length===0&&track.buffer){// Play audio normally (the buffer has the audio data)
+// This block is intentionally empty - audio clips already play above
+}});};// Solo playback for Local Selection Loop (LOOP_MAKER.md §2.2)
 const startLocalTrackPlayback=(trackId,offsetTime)=>{const context=getAudioContext();const track=tracks.find(t=>t.id===trackId);if(!track)return;const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default',buffer:track.buffer,startTime:track.startTime||0,name:track.name,speed:track.speed||1.0}]:[];// Create persistent gain & panner for real-time control
 const gainNode=context.createGain();const volDb=track.volumeDb??0;const volLinear=volDb<=-50?0:Math.pow(10,volDb/20);gainNode.gain.setValueAtTime(volLinear,context.currentTime);const pannerNode=context.createStereoPanner();pannerNode.pan.setValueAtTime((track.pan??0)/100,context.currentTime);pannerNode.connect(context.destination);activeTrackNodesRef.current[trackId]={gainNode,pannerNode};clips.forEach(clip=>{if(!clip.buffer)return;const source=context.createBufferSource();source.buffer=clip.buffer;source.playbackRate.value=clip.speed||1.0;source.connect(gainNode);gainNode.connect(pannerNode);const clipStart=clip.startTime||0;const clipDuration=clip.buffer.duration/(clip.speed||1.0);const clipEnd=clipStart+clipDuration;if(offsetTime<clipStart){const delay=clipStart-offsetTime;source.start(context.currentTime+delay,0);activeSourcesRef.current.push(source);}else if(offsetTime<clipEnd){const playOffset=offsetTime-clipStart;source.start(context.currentTime,playOffset*(clip.speed||1.0));activeSourcesRef.current.push(source);}});// MIDI items playback
 const midiItems=track.midiItems||[];if((track.type==='MIDI'||midiItems.length>0)&&window.SonicSF){const bpmVal=parseInt(bpm)||120;const secondsPerBeat=60.0/bpmVal;midiItems.forEach(item=>{const notes=item.notes||[];notes.forEach(note=>{const noteStartSec=item.startTime+(note.start_beat||0)*secondsPerBeat;const noteDurSec=(note.duration_beats||1)*secondsPerBeat;const noteEndSec=noteStartSec+noteDurSec;if(offsetTime<noteEndSec){const durationMs=noteDurSec*1000;const program=track.instrumentProgram!==undefined?track.instrumentProgram:0;if(offsetTime<noteStartSec){const delay=noteStartSec-offsetTime;const startTime=context.currentTime+delay;window.SonicSF.playNote(note.pitch||60,note.velocity||0.8,durationMs,startTime,program,gainNode);}else{const remainingDurMs=(noteEndSec-offsetTime)*1000;window.SonicSF.playNote(note.pitch||60,note.velocity||0.8,remainingDurMs,context.currentTime,program,gainNode);}}});});}};const handlePlayPause=()=>{if(activeTab!=='main'){// Sub-tab playback transport
-const st=subTabs.find(s=>s.id===activeTab);if(!st||!st.buffer)return;if(st.isPlaying){stopAllPlayback();setSubTabs(prev=>prev.map(s=>s.id===activeTab?{...s,isPlaying:false}:s));}else{stopAllPlayback();const startOffset=st.currentTime||0;startSubTabPlayback(st,startOffset);setSubTabs(prev=>prev.map(s=>s.id===activeTab?{...s,isPlaying:true,currentTime:startOffset}:s));}return;}const context=getAudioContext();if(isPlaying){stopAllPlayback();}else{startOffsetTimeRef.current=currentTime;startAudioTimeRef.current=context.currentTime;startTrackPlayback(currentTime);setIsPlaying(true);}};handlePlayPauseRef.current=handlePlayPause;const handlePause=()=>{if(isPlaying||subTabs.some(s=>s.isPlaying))stopAllPlayback();};const stopAllPlayback=()=>{activeSourcesRef.current.forEach(src=>{try{src.stop();}catch(e){}});activeSourcesRef.current=[];activeTrackNodesRef.current={};if(window.SonicSF){window.SonicSF.stopAll();}setIsPlaying(false);setSubTabs(prev=>prev.map(s=>({...s,isPlaying:false})));};const handleStop=()=>{if(recordingStateRef.current==='RECORDING'||recordingStateRef.current==='COUNT_IN'){stopRecordingTake();return;}stopAllPlayback();if(activeTab!=='main'){setSubTabs(prev=>prev.map(s=>s.id===activeTab?{...s,currentTime:0}:s));}else{setCurrentTime(0);}};const drawVuMeter=(canvas,db)=>{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);const minDb=-60;const maxDb=0;const frac=Math.max(0,Math.min(1,(db-minDb)/(maxDb-minDb)));ctx.fillStyle='#18181b';ctx.fillRect(0,0,w,h);const grad=ctx.createLinearGradient(0,0,w,0);grad.addColorStop(0,'#10b981');grad.addColorStop(0.7,'#eab308');grad.addColorStop(0.95,'#ef4444');ctx.fillStyle=grad;ctx.fillRect(0,0,w*frac,h);if(db>=-0.5){ctx.fillStyle='#ff0000';ctx.fillRect(w-6,0,6,h);}};const handleRecordClick=async()=>{if(recordingState==='RECORDING'||recordingState==='COUNT_IN'){await stopRecordingTake();return;}const armed=activeTracks.filter(t=>t.isArmed&&t.inputSource?.deviceType&&t.inputSource.deviceType!=='NONE');if(armed.length===0){showToast('Vui lòng Arm (R) ít nhất một track và chọn cổng Input để ghi âm.','warning');return;}setRecordingState('COUNT_IN');const secondsPerBeat=60.0/(parseInt(bpm)||120);const countInDuration=secondsPerBeat*4;const audioCtx=getAudioContext();const now=audioCtx.currentTime;showToast('Metronome Count-in: 4... 3... 2... 1...','info');for(let i=0;i<4;i++){playMetronomeClick(now+i*secondsPerBeat,i===0);}setTimeout(()=>{startRecordingTake(armed);},countInDuration*1000);};const startRecordingTake=async armedTracks=>{const context=getAudioContext();if(context.state==='suspended'){await context.resume();}setRecordingState('RECORDING');setRecTempMidiNotes([]);setRecTempAudioBuffer(null);const startTimelineTime=currentTime;setRecStartTimelineTime(startTimelineTime);recordingStartTimeRef.current=startTimelineTime;const secondsPerBeat=60.0/(parseInt(bpm)||120);const startBeat=startTimelineTime/secondsPerBeat;nextMetronomeBeatRef.current=Math.ceil(startBeat);activeMIDIRecordersRef.current={};activeAudioRecordersRef.current={};recordingPCMDataRef.current={};startOffsetTimeRef.current=startTimelineTime;startAudioTimeRef.current=context.currentTime;startTrackPlayback(startTimelineTime);setIsPlaying(true);let midiRecList=[];for(let track of armedTracks){if(track.inputSource.deviceType==='MIDI_KEYBOARD'){const midiRec=new ClientMIDIRecorder(context,parseInt(bpm)||120,4);const tempMidiItemId='midi_rec_'+Date.now()+'_'+track.id;midiRec.tempMidiItemId=tempMidiItemId;updateActiveTracks(prev=>prev.map(t=>{if(t.id!==track.id)return t;return{...t,midiItems:[...(t.midiItems||[]),{id:tempMidiItemId,name:'Recording...',startTime:startTimelineTime,duration:4*(secondsPerBeat*4),notes:[]}]};}));midiRec.onNoteOn=(pitch,currentBeat)=>{const canvas=trackVuRefs.current[track.id];if(canvas){drawVuMeter(canvas,0);setTimeout(()=>drawVuMeter(canvas,-60),100);}const elapsedBeats=Math.max(0,currentBeat);const elapsedSec=elapsedBeats*secondsPerBeat;const durationSec=Math.max(4*(secondsPerBeat*4),elapsedSec);const allNotes=[...midiRec.recordedNotes,...Array.from(midiRec.activeNotes.values()).map(n=>({...n,duration_beats:currentBeat-n.start_beat}))];setRecTempMidiNotes(allNotes);setCanvasRedrawCount(n=>n+1);if(midiRec.tempMidiItemId){updateActiveTracks(prev=>prev.map(t=>{if(t.id!==track.id)return t;return{...t,midiItems:t.midiItems.map(m=>m.id===midiRec.tempMidiItemId?{...m,notes:allNotes,duration:durationSec}:m)};}));}};midiRec.onNoteOff=()=>{const currentBeat=(context.currentTime-midiRec.recStartAudioTime-midiRec.latencyCompSec)/(60.0/midiRec.bpm);const elapsedBeats=Math.max(0,currentBeat);const elapsedSec=elapsedBeats*secondsPerBeat;const durationSec=Math.max(4*(secondsPerBeat*4),elapsedSec);const activeNotesArray=Array.from(midiRec.activeNotes.values()).map(n=>({...n,duration_beats:currentBeat-n.start_beat}));const allNotes=[...midiRec.recordedNotes,...activeNotesArray];setRecTempMidiNotes(allNotes);setCanvasRedrawCount(n=>n+1);if(midiRec.tempMidiItemId){updateActiveTracks(prev=>prev.map(t=>{if(t.id!==track.id)return t;return{...t,midiItems:t.midiItems.map(m=>m.id===midiRec.tempMidiItemId?{...m,notes:allNotes,duration:durationSec}:m)};}));}};midiRec.start(startTimelineTime/(secondsPerBeat*4),track.inputSource.deviceId);activeMIDIRecordersRef.current[track.id]=midiRec;midiRecList.push({trackId:track.id,midiRec});}else if(track.inputSource.deviceType==='MICROPHONE'){const audioRec=new ClientAudioRecorder(context);try{await audioRec.initializeInput(track.inputSource.deviceId);recordingPCMDataRef.current[track.id]=[];audioRec.onLevelUpdate=db=>{const canvas=trackVuRefs.current[track.id];if(canvas){drawVuMeter(canvas,db);}};audioRec.onPCMChunk=chunk=>{if(recordingPCMDataRef.current[track.id]){const currentData=recordingPCMDataRef.current[track.id];const newData=new Float32Array(currentData.length+chunk.length);newData.set(currentData);newData.set(chunk,currentData.length);recordingPCMDataRef.current[track.id]=newData;}};const monitorGain=track.monitoringEnabled?context.destination:null;await audioRec.start(monitorGain,track.monitoringEnabled);activeAudioRecordersRef.current[track.id]=audioRec;}catch(err){console.error('Failed to initialize microphone:',err);showToast('Không khởi động được micro: '+err.message,'warning');}}}recordingSyncRef.current=setInterval(()=>{const secondsPerBeatInt=60.0/(parseInt(bpm)||120);for(let{trackId,midiRec}of midiRecList){if(!midiRec.isRecording||!midiRec.tempMidiItemId)continue;const currentTimeSec=Math.max(0,getAudioContext().currentTime-midiRec.recStartAudioTime-midiRec.latencyCompSec);const currentBeat=currentTimeSec/secondsPerBeatInt;const allNotes=[...midiRec.recordedNotes,...Array.from(midiRec.activeNotes.values()).map(n=>({...n,duration_beats:currentBeat-n.start_beat}))];const durationSec=Math.max(4*(secondsPerBeatInt*4),currentTimeSec);if(Math.random()<0.2){// Throttle log to prevent flooding (approx 2 logs/sec)
+const st=subTabs.find(s=>s.id===activeTab);if(!st||!st.buffer&&st.type!=='PIANO_ROLL')return;if(st.isPlaying){stopAllPlayback();setSubTabs(prev=>prev.map(s=>s.id===activeTab?{...s,isPlaying:false}:s));}else{stopAllPlayback();const startOffset=st.currentTime||0;if(st.type==='PIANO_ROLL'){// Piano Roll: play MIDI notes via SonicSF
+const context=getAudioContext();const notes=st.notes||[];const bpmVal=parseInt(bpm)||120;const secondsPerBeat=60.0/bpmVal;const startWallTime=context.currentTime;// Find the track to get instrument settings
+const track=activeTracks.find(t=>t.id===st.trackId);const instrumentProgram=track?track.instrumentProgram:undefined;const instrumentName=track?track.instrumentName:undefined;notes.forEach(note=>{const noteOnBeat=note.start_beat||0;const noteDurBeat=note.duration_beats||1;const noteStartSec=noteOnBeat*secondsPerBeat;const noteDurSec=noteDurBeat*secondsPerBeat;if(noteStartSec+noteDurSec>startOffset){const effectiveStart=Math.max(0,noteStartSec-startOffset);const effectiveDur=noteDurSec-Math.max(0,startOffset-noteStartSec);const scheduledTime=startWallTime+effectiveStart;const durMs=effectiveDur*1000;if(window.SonicSF){window.SonicSF.playNote(note.pitch||60,note.velocity||0.8,durMs,scheduledTime,instrumentProgram,null);}}});}else{startSubTabPlayback(st,startOffset);}setSubTabs(prev=>prev.map(s=>s.id===activeTab?{...s,isPlaying:true,currentTime:startOffset}:s));}return;}const context=getAudioContext();if(isPlaying){stopAllPlayback();}else{startOffsetTimeRef.current=currentTime;startAudioTimeRef.current=context.currentTime;startTrackPlayback(currentTime);setIsPlaying(true);}};handlePlayPauseRef.current=handlePlayPause;const handlePause=()=>{if(isPlaying||subTabs.some(s=>s.isPlaying))stopAllPlayback();};const stopAllPlayback=()=>{activeSourcesRef.current.forEach(src=>{try{src.stop();}catch(e){}});activeSourcesRef.current=[];activeTrackNodesRef.current={};if(window.SonicSF){window.SonicSF.stopAll();}setIsPlaying(false);setSubTabs(prev=>prev.map(s=>({...s,isPlaying:false})));};const handleStop=()=>{if(recordingStateRef.current==='RECORDING'||recordingStateRef.current==='COUNT_IN'){stopRecordingTake();return;}stopAllPlayback();if(activeTab!=='main'){setSubTabs(prev=>prev.map(s=>s.id===activeTab?{...s,currentTime:0}:s));}else{setCurrentTime(0);}};const drawVuMeter=(canvas,db)=>{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);const minDb=-60;const maxDb=0;const frac=Math.max(0,Math.min(1,(db-minDb)/(maxDb-minDb)));ctx.fillStyle='#18181b';ctx.fillRect(0,0,w,h);const grad=ctx.createLinearGradient(0,0,w,0);grad.addColorStop(0,'#10b981');grad.addColorStop(0.7,'#eab308');grad.addColorStop(0.95,'#ef4444');ctx.fillStyle=grad;ctx.fillRect(0,0,w*frac,h);if(db>=-0.5){ctx.fillStyle='#ff0000';ctx.fillRect(w-6,0,6,h);}};const handleRecordClick=async()=>{if(recordingState==='RECORDING'||recordingState==='COUNT_IN'){await stopRecordingTake();return;}const armed=activeTracks.filter(t=>t.isArmed&&t.inputSource?.deviceType&&t.inputSource.deviceType!=='NONE');if(armed.length===0){showToast('Vui lòng Arm (R) ít nhất một track và chọn cổng Input để ghi âm.','warning');return;}setRecordingState('COUNT_IN');const secondsPerBeat=60.0/(parseInt(bpm)||120);const countInDuration=secondsPerBeat*4;const audioCtx=getAudioContext();const now=audioCtx.currentTime;showToast('Metronome Count-in: 4... 3... 2... 1...','info');for(let i=0;i<4;i++){playMetronomeClick(now+i*secondsPerBeat,i===0);}setTimeout(()=>{startRecordingTake(armed);},countInDuration*1000);};const startRecordingTake=async armedTracks=>{const context=getAudioContext();if(context.state==='suspended'){await context.resume();}setRecordingState('RECORDING');setRecTempMidiNotes([]);setRecTempAudioBuffer(null);const startTimelineTime=currentTime;setRecStartTimelineTime(startTimelineTime);recordingStartTimeRef.current=startTimelineTime;const secondsPerBeat=60.0/(parseInt(bpm)||120);const startBeat=startTimelineTime/secondsPerBeat;nextMetronomeBeatRef.current=Math.ceil(startBeat);activeMIDIRecordersRef.current={};activeAudioRecordersRef.current={};recordingPCMDataRef.current={};startOffsetTimeRef.current=startTimelineTime;startAudioTimeRef.current=context.currentTime;startTrackPlayback(startTimelineTime);setIsPlaying(true);let midiRecList=[];for(let track of armedTracks){if(track.inputSource.deviceType==='MIDI_KEYBOARD'){const midiRec=new ClientMIDIRecorder(context,parseInt(bpm)||120,4);const tempMidiItemId='midi_rec_'+Date.now()+'_'+track.id;midiRec.tempMidiItemId=tempMidiItemId;updateActiveTracks(prev=>prev.map(t=>{if(t.id!==track.id)return t;return{...t,midiItems:[...(t.midiItems||[]),{id:tempMidiItemId,name:'Recording...',startTime:startTimelineTime,duration:4*(secondsPerBeat*4),notes:[]}]};}));midiRec.onNoteOn=(pitch,currentBeat)=>{const canvas=trackVuRefs.current[track.id];if(canvas){drawVuMeter(canvas,0);setTimeout(()=>drawVuMeter(canvas,-60),100);}const elapsedBeats=Math.max(0,currentBeat);const elapsedSec=elapsedBeats*secondsPerBeat;const durationSec=Math.max(4*(secondsPerBeat*4),elapsedSec);const allNotes=[...midiRec.recordedNotes,...Array.from(midiRec.activeNotes.values()).map(n=>({...n,duration_beats:currentBeat-n.start_beat}))];setRecTempMidiNotes(allNotes);setCanvasRedrawCount(n=>n+1);if(midiRec.tempMidiItemId){updateActiveTracks(prev=>prev.map(t=>{if(t.id!==track.id)return t;return{...t,midiItems:t.midiItems.map(m=>m.id===midiRec.tempMidiItemId?{...m,notes:allNotes,duration:durationSec}:m)};}));}};midiRec.onNoteOff=()=>{const currentBeat=(context.currentTime-midiRec.recStartAudioTime-midiRec.latencyCompSec)/(60.0/midiRec.bpm);const elapsedBeats=Math.max(0,currentBeat);const elapsedSec=elapsedBeats*secondsPerBeat;const durationSec=Math.max(4*(secondsPerBeat*4),elapsedSec);const activeNotesArray=Array.from(midiRec.activeNotes.values()).map(n=>({...n,duration_beats:currentBeat-n.start_beat}));const allNotes=[...midiRec.recordedNotes,...activeNotesArray];setRecTempMidiNotes(allNotes);setCanvasRedrawCount(n=>n+1);if(midiRec.tempMidiItemId){updateActiveTracks(prev=>prev.map(t=>{if(t.id!==track.id)return t;return{...t,midiItems:t.midiItems.map(m=>m.id===midiRec.tempMidiItemId?{...m,notes:allNotes,duration:durationSec}:m)};}));}};midiRec.start(startTimelineTime/(secondsPerBeat*4),track.inputSource.deviceId);activeMIDIRecordersRef.current[track.id]=midiRec;midiRecList.push({trackId:track.id,midiRec});}else if(track.inputSource.deviceType==='MICROPHONE'){const audioRec=new ClientAudioRecorder(context);try{await audioRec.initializeInput(track.inputSource.deviceId);recordingPCMDataRef.current[track.id]=[];audioRec.onLevelUpdate=db=>{const canvas=trackVuRefs.current[track.id];if(canvas){drawVuMeter(canvas,db);}};audioRec.onPCMChunk=chunk=>{if(recordingPCMDataRef.current[track.id]){const currentData=recordingPCMDataRef.current[track.id];const newData=new Float32Array(currentData.length+chunk.length);newData.set(currentData);newData.set(chunk,currentData.length);recordingPCMDataRef.current[track.id]=newData;}};const monitorGain=track.monitoringEnabled?context.destination:null;await audioRec.start(monitorGain,track.monitoringEnabled);activeAudioRecordersRef.current[track.id]=audioRec;}catch(err){console.error('Failed to initialize microphone:',err);showToast('Không khởi động được micro: '+err.message,'warning');}}}recordingSyncRef.current=setInterval(()=>{const secondsPerBeatInt=60.0/(parseInt(bpm)||120);for(let{trackId,midiRec}of midiRecList){if(!midiRec.isRecording||!midiRec.tempMidiItemId)continue;const currentTimeSec=Math.max(0,getAudioContext().currentTime-midiRec.recStartAudioTime-midiRec.latencyCompSec);const currentBeat=currentTimeSec/secondsPerBeatInt;const allNotes=[...midiRec.recordedNotes,...Array.from(midiRec.activeNotes.values()).map(n=>({...n,duration_beats:currentBeat-n.start_beat}))];const durationSec=Math.max(4*(secondsPerBeatInt*4),currentTimeSec);if(Math.random()<0.2){// Throttle log to prevent flooding (approx 2 logs/sec)
 console.log(`[DevLog] [MIDI Rec Sync] Temp Item ID: ${midiRec.tempMidiItemId}, Duration: ${durationSec.toFixed(2)}s, ActiveNotes: ${midiRec.activeNotes.size}, RecordedNotes: ${midiRec.recordedNotes.length}`);}setRecTempMidiNotes(allNotes);setCanvasRedrawCount(n=>n+1);updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;return{...t,midiItems:t.midiItems.map(m=>m.id===midiRec.tempMidiItemId?{...m,notes:allNotes,duration:durationSec}:m)};}));}},100);showToast('Đang ghi âm...','info');};const stopRecordingTake=async()=>{setRecordingState('IDLE');stopAllPlayback();const context=getAudioContext();const secondsPerBeat=60.0/(parseInt(bpm)||120);const secondsPerBar=secondsPerBeat*4;const midiRecorders=activeMIDIRecordersRef.current;const audioRecorders=activeAudioRecordersRef.current;Object.keys(trackVuRefs.current).forEach(tid=>{const canvas=trackVuRefs.current[tid];if(canvas)drawVuMeter(canvas,-60);});let hasRecordedAnything=false;for(let trackId in midiRecorders){const midiRec=midiRecorders[trackId];const recordedNotes=midiRec.stop();if(midiRec.tempMidiItemId){const recCurrentTimeSec=Math.max(0,context.currentTime-midiRec.recStartAudioTime-midiRec.latencyCompSec);const recElapsedBeats=recCurrentTimeSec/(60.0/midiRec.bpm);const totalDurationBeats=Math.max(4.0,recordedNotes.length>0?Math.max(recElapsedBeats,...recordedNotes.map(n=>n.start_beat+n.duration_beats)):recElapsedBeats);updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;const itemIndex=(t.midiItems||[]).findIndex(m=>m.id===midiRec.tempMidiItemId);if(itemIndex>=0){const updatedItems=[...t.midiItems];updatedItems[itemIndex]={...updatedItems[itemIndex],name:recordedNotes.length>0?'Recorded MIDI':'Empty MIDI',notes:recordedNotes,duration:Math.ceil(totalDurationBeats/4)*secondsPerBar};return{...t,midiItems:updatedItems};}const newMidiItem={id:'midi_rec_'+Date.now(),name:'Recorded MIDI',startTime:recordingStartTimeRef.current,duration:Math.ceil(totalDurationBeats/4)*secondsPerBar,notes:recordedNotes};return{...t,midiItems:[...(t.midiItems||[]),newMidiItem]};}));if(recordedNotes.length>0){hasRecordedAnything=true;}}else if(recordedNotes.length>0){hasRecordedAnything=true;const totalDurationBeats=Math.max(4.0,...recordedNotes.map(n=>n.start_beat+n.duration_beats));const newMidiItem={id:'midi_rec_'+Date.now(),name:'Recorded MIDI',startTime:recordingStartTimeRef.current,duration:Math.ceil(totalDurationBeats/4)*secondsPerBar,notes:recordedNotes};updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;return{...t,midiItems:[...(t.midiItems||[]),newMidiItem]};}));}}for(let trackId in audioRecorders){const audioRec=audioRecorders[trackId];const audioBuffer=await audioRec.stop();if(audioBuffer&&audioBuffer.duration>0.05){hasRecordedAnything=true;const newClip={id:'clip_rec_'+Date.now(),name:'Recorded Audio.wav',buffer:audioBuffer,startTime:recordingStartTimeRef.current,speed:1.0};updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;const updatedClips=[...(t.clips||[]),newClip];return{...t,clips:updatedClips,buffer:updatedClips[0]?.buffer||null,startTime:updatedClips[0]?.startTime||0,name:updatedClips[0]?.name||t.name};}));}}if(recordingSyncRef.current){clearInterval(recordingSyncRef.current);recordingSyncRef.current=null;}activeMIDIRecordersRef.current={};activeAudioRecordersRef.current={};recordingPCMDataRef.current={};setRecTempMidiNotes([]);setRecTempAudioBuffer(null);if(hasRecordedAnything){showToast('Đã thu và lưu bản ghi vào timeline.','success');}else{showToast('Đã dừng ghi âm (không phát hiện tín hiệu đầu vào).','info');}};const handleSubTabResizeMouseDown=e=>{e.preventDefault();e.stopPropagation();const startY=e.clientY;const startHeight=subTabHeight;const handleMouseMove=moveEvent=>{const deltaY=moveEvent.clientY-startY;const newHeight=Math.max(48,Math.min(400,startHeight+deltaY));setSubTabHeight(newHeight);};const handleMouseUp=()=>{document.removeEventListener('mousemove',handleMouseMove);document.removeEventListener('mouseup',handleMouseUp);};document.addEventListener('mousemove',handleMouseMove);document.addEventListener('mouseup',handleMouseUp);};// ── Playhead set with seek+play ──
 const handlePlayheadSet=(time,shiftKey)=>{localSelectionAnchorRef.current=time;if(isPlaying){// Click during playback: seek to position and continue playing
 setCurrentTime(time);stopAllPlayback();setTimeout(()=>{startOffsetTimeRef.current=time;startAudioTimeRef.current=getAudioContext().currentTime;startTrackPlayback(time);setIsPlaying(true);},50);}else{// Normal click: just set playhead
@@ -321,5 +340,5 @@ const handleSplitTrackAtTime=(trackId,clipId,time)=>{const track=tracks.find(t=>
 const handleGlueTracks=()=>{const track=tracks.find(t=>t.id===selectedTrackId);if(!track){showToast('Vui lòng chọn một track để thực hiện gộp (glue).','warning');return;}const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default',buffer:track.buffer,startTime:track.startTime||0,name:track.name}]:[];if(clips.length<2){showToast('Cần ít nhất 2 clip trên track này để gộp (glue).','warning');return;}const beforeSnap=captureTrackSnapshot(track.id);const ctx=getAudioContext();const sr=clips[0].buffer.sampleRate;let minStart=Infinity;let maxEnd=-Infinity;clips.forEach(c=>{const start=c.startTime||0;const end=start+c.buffer.duration;minStart=Math.min(minStart,start);maxEnd=Math.max(maxEnd,end);});const newDur=maxEnd-minStart;const newBuffer=ctx.createBuffer(1,Math.ceil(newDur*sr),sr);const newData=newBuffer.getChannelData(0);clips.forEach(c=>{const data=c.buffer.getChannelData(0);const offset=Math.floor(((c.startTime||0)-minStart)*sr);for(let i=0;i<data.length;i++){if(offset+i<newData.length){newData[offset+i]+=data[i];}}});let maxPeak=0;for(let i=0;i<newData.length;i++){const abs=Math.abs(newData[i]);if(abs>maxPeak)maxPeak=abs;}if(maxPeak>1.0){for(let i=0;i<newData.length;i++)newData[i]/=maxPeak;}const mergedClip={id:'clip_merged_'+Date.now(),name:`${track.name.replace(' (Part 1)','').replace(' (Part 2)','')} (Glued)`,buffer:newBuffer,startTime:minStart};setTracks(prev=>prev.map(t=>{if(t.id===track.id){return{...t,clips:[mergedClip],buffer:newBuffer,startTime:minStart,name:mergedClip.name};}return t;}));setTimeout(()=>{const afterSnap=captureTrackSnapshot(track.id);pushAction('GLUE',track.id,beforeSnap,afterSnap);},50);showToast(`Đã gộp ${clips.length} clips thành công.`,'success');};// ── DAW Command Registration for AI (28_AI_PANEL.md §1 & §2) ──
 useEffect(()=>{if(typeof window.DAWCommandDispatcher==='undefined')return;const api={createTrack:args=>{const name=args.name||`AI_Track_${Date.now()}`;const type=args.type||'audio';const newId=addNewTrack();if(name&&name!==`AI_Track_${Date.now()}`){updateTrackName(newId,name);}return{success:true,trackId:newId,name};},deleteTrack:args=>{const tid=args.track_id||selectedTrackId;if(!tid)return{success:false,error:'No track_id provided'};deleteTrack(tid);return{success:true,trackId:tid};},addClip:args=>{const trackId=args.track_id||selectedTrackId;const barDur=60/parseInt(bpm||120)*4;let startTime;if(args.start_time!==undefined&&args.start_time!==null)startTime=args.start_time;else if(args.start_bar!==undefined&&args.start_bar!==null)startTime=args.start_bar*barDur;else startTime=currentTime;const track=tracks.find(t=>t.id===trackId);if(!track)return{success:false,error:'Track not found'};const ctx=getAudioContext();const sr=44100;let duration;if(args.duration_seconds!==undefined&&args.duration_seconds!==null)duration=args.duration_seconds;else if(args.length_bars!==undefined&&args.length_bars!==null)duration=args.length_bars*barDur;else duration=2;const buffer=ctx.createBuffer(1,Math.floor(sr*duration),sr);const data=buffer.getChannelData(0);for(let i=0;i<data.length;i++)data[i]=0;const clipId=nextClipId();setTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;const clips=t.clips&&t.clips.length>0?t.clips:t.buffer?[{id:'default_'+t.id,buffer:t.buffer,startTime:t.startTime||0,name:t.name}]:[];return{...t,clips:[...clips,{id:clipId,buffer,startTime,name:args.name||'AI Clip'}],buffer:clips.length>0?clips[0].buffer:buffer,startTime:clips.length>0?clips[0].startTime:startTime,name:clips.length>0?clips[0].name:args.name||t.name};}));return{success:true,clipId,trackId};},removeClip:args=>{const trackId=args.track_id||selectedTrackId;const clipId=args.clip_id;setTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;const updatedClips=(t.clips||[]).filter(c=>c.id!==clipId);return{...t,clips:updatedClips,buffer:updatedClips[0]?.buffer||null,startTime:updatedClips[0]?.startTime||0,name:updatedClips[0]?.name||t.name};}));return{success:true};},setTrackVolume:args=>{const trackId=args.track_id||selectedTrackId;const vol=args.volume_db??args.volume??0;updateTrackVolumeDb(trackId,parseFloat(vol));return{success:true,trackId,volumeDb:vol};},setTrackPan:args=>{const trackId=args.track_id||selectedTrackId;const pan=args.pan??0;updateTrackPan(trackId,parseInt(pan));return{success:true,trackId,pan};},toggleMute:args=>{const trackId=args.track_id||selectedTrackId;toggleTrackMute(trackId);const track=tracks.find(t=>t.id===trackId);return{success:true,trackId,muted:track?track.muted:null};},toggleSolo:args=>{const trackId=args.track_id||selectedTrackId;toggleTrackSoloEvaluate(trackId);const track=tracks.find(t=>t.id===trackId);return{success:true,trackId,solo:track?track.solo:null};},processAudioDsp:args=>{const trackId=args.track_id||selectedTrackId;const action=args.action;const params=args.params||{};const track=tracks.find(t=>t.id===trackId);if(!track||!track.buffer)return{success:false,error:'Track has no audio buffer'};if(action==='normalize'){const channelData=track.buffer.getChannelData(0);let maxVal=0;for(let i=0;i<channelData.length;i++)maxVal=Math.max(maxVal,Math.abs(channelData[i]));if(maxVal>0){const gain=1.0/maxVal;for(let i=0;i<channelData.length;i++)channelData[i]*=gain;}return{success:true,action:'normalize'};}else if(action==='invert_phase'){const channelData=track.buffer.getChannelData(0);for(let i=0;i<channelData.length;i++)channelData[i]*=-1;return{success:true,action:'invert_phase'};}else if(action==='gain'){const gainDb=params.gain_db??0;const scale=Math.pow(10,gainDb/20);const channelData=track.buffer.getChannelData(0);for(let i=0;i<channelData.length;i++)channelData[i]=Math.max(-1,Math.min(1,channelData[i]*scale));return{success:true,action:'gain',gainDb};}else if(action==='pitch_shift'){const semitones=params.semitones??0;const ratio=Math.pow(2,semitones/12);const applyResample=(data,r)=>{const newLen=Math.round(data.length*r);const out=new Float32Array(newLen);for(let i=0;i<newLen;i++){const srcIdx=i/r;const idx0=Math.floor(srcIdx);const idx1=Math.min(idx0+1,data.length-1);const frac=srcIdx-idx0;out[i]=data[idx0]*(1-frac)+data[idx1]*frac;}return out;};const channelData=track.buffer.getChannelData(0);const newData=applyResample(channelData,1/ratio);const ctx=getAudioContext();const newBuffer=ctx.createBuffer(1,newData.length,track.buffer.sampleRate);newBuffer.copyToChannel(newData,0);setTracks(prev=>prev.map(t=>t.id===trackId?{...t,buffer:newBuffer}:t));return{success:true,action:'pitch_shift',semitones};}return{success:false,error:`Unknown action: ${action}`};},renameTrack:args=>{const tid=args.track_id||selectedTrackId;const name=args.name;if(!tid)return{success:false,error:'No track_id provided'};if(!name)return{success:false,error:'No name provided'};updateTrackName(tid,name);return{success:true,trackId:tid,name};},setSelection:args=>{const barDur=60/parseInt(bpm||120)*4;let start,end;if(args.start_time!==undefined&&args.start_time!==null)start=args.start_time;else if(args.start_bar!==undefined&&args.start_bar!==null)start=args.start_bar*barDur;else start=currentTime;if(args.end_time!==undefined&&args.end_time!==null)end=args.end_time;else if(args.length_bars!==undefined&&args.length_bars!==null)end=start+args.length_bars*barDur;else if(args.end_bar!==undefined&&args.end_bar!==null)end=args.end_bar*barDur;else end=start+barDur;clearLocalSelection();setSelectionMode('global');setSelectionStart(start);setSelectionEnd(end);selectionRef.current={start,end};return{success:true,start:parseFloat(start.toFixed(3)),end:parseFloat(end.toFixed(3)),length:parseFloat((end-start).toFixed(3))};},cutAudio:args=>{const currentTracks=window.DAWCommandDispatcher?.currentTracks||tracks;const currentSelTrackId=window.DAWCommandDispatcher?.currentSelectedTrackId||selectedTrackId;const tid=args.track_id||currentSelTrackId;const track=currentTracks.find(t=>t.id===String(tid));if(!track)return{success:false,error:'Track not found'};if(!track.buffer)return{success:false,error:'Track has no audio buffer'};const barDur=60/parseInt(bpm||120)*4;const sel=selectionRef.current;let rawStart,rawEnd;if(args.start_time!==undefined&&args.start_time!==null)rawStart=args.start_time;else if(args.start_bar!==undefined&&args.start_bar!==null)rawStart=args.start_bar*barDur;else if(sel.start!==null)rawStart=sel.start;else rawStart=currentTime;if(args.end_time!==undefined&&args.end_time!==null)rawEnd=args.end_time;else if(args.end_bar!==undefined&&args.end_bar!==null)rawEnd=args.end_bar*barDur;else if(args.length_bars!==undefined&&args.length_bars!==null)rawEnd=rawStart+args.length_bars*barDur;else if(sel.end!==null&&sel.end>rawStart)rawEnd=sel.end;else return{success:false,error:'No end position provided. Provide end_time, end_bar, or length_bars.'};if(rawEnd<=rawStart)return{success:false,error:'End position must be after start position.'};const buffer=track.buffer;const ctx=getAudioContext();const snap=args.snap_silence!==false;const loopStart=snap?findZeroCrossing(buffer,rawStart):rawStart;const loopEnd=snap?findZeroCrossing(buffer,rawEnd):rawEnd;const sampleRate=buffer.sampleRate;const startSample=Math.max(0,Math.min(buffer.length-1,Math.floor(loopStart*sampleRate)));const endSample=Math.max(0,Math.min(buffer.length,Math.floor(loopEnd*sampleRate)));const sliceLength=endSample-startSample;if(sliceLength<=100)return{success:false,error:'Selection too short or invalid'};const numChannels=buffer.numberOfChannels||1;const slicedBuffer=ctx.createBuffer(numChannels,sliceLength,sampleRate);for(let c=0;c<numChannels;c++){const src=buffer.getChannelData(c);const dst=slicedBuffer.getChannelData(c);dst.set(src.subarray(startSample,endSample));}const newId='track_cut_'+Date.now();const colors=['#0f766e','#1d4ed8','#701a75','#a21caf','#b45309'];const color=colors[currentTracks.length%colors.length];const cutName=args.new_track_name||`Cut_${track.name}`;const newTrack={id:newId,name:cutName,buffer:slicedBuffer,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color,markers:[],clips:[{id:'clip_'+newId,buffer:slicedBuffer,startTime:0,name:cutName}],serverFileId:null};const idx=currentTracks.findIndex(t=>t.id===tid);const nextTracks=[...currentTracks];if(idx!==-1){nextTracks.splice(idx+1,0,newTrack);}else{nextTracks.push(newTrack);}if(window.DAWCommandDispatcher){window.DAWCommandDispatcher.currentTracks=nextTracks;window.DAWCommandDispatcher.currentSelectedTrackId=newId;window.DAWCommandDispatcher.lastCutSourceTrackId=tid;window.DAWCommandDispatcher.lastCutNewTrackId=newId;}setTracks(nextTracks);setSelectedTrackId(newId);selectionRef.current={start:0,end:slicedBuffer.duration};clearLocalSelection();setSelectionMode('global');setSelectionStart(0);setSelectionEnd(slicedBuffer.duration);setTimeout(()=>lucide.createIcons(),200);return{success:true,trackId:newId,trackName:cutName,cutStart:parseFloat(loopStart.toFixed(3)),cutEnd:parseFloat(loopEnd.toFixed(3)),duration:parseFloat(slicedBuffer.duration.toFixed(3))};},scanTrack:args=>{const tid=args.track_id||selectedTrackId;const track=tracks.find(t=>t.id===tid);if(!track)return{success:false,error:'Track not found'};if(!track.buffer)return{success:false,error:'Track has no audio buffer. Load audio first.'};const buffer=track.buffer;const data=buffer.getChannelData(0);const sr=buffer.sampleRate;const channels=buffer.numberOfChannels;const duration=buffer.duration;const totalSamples=buffer.length;const windowSize=Math.min(sr*3,data.length);let detectedBPM=0;if(windowSize>sr){let maxCorr=0;for(let lag=Math.floor(sr*0.3);lag<=Math.floor(sr*2.0);lag++){let corr=0;const step=4;for(let i=0;i<windowSize&&i+lag<data.length;i+=step)corr+=data[i]*data[i+lag];corr/=windowSize/step;if(corr>maxCorr){maxCorr=corr;detectedBPM=60/(lag/sr);}}}detectedBPM=Math.round(Math.min(300,Math.max(30,detectedBPM)));if(args.set_tempo!==false&&detectedBPM>0){setBpm(String(detectedBPM));}const bitDepth=16;const bitrate=Math.round(sr*channels*bitDepth/1000);return{success:true,trackId:tid,trackName:track.name,bpm:detectedBPM,sampleRate:sr,channels,duration:parseFloat(duration.toFixed(3)),totalSamples,bitDepth,bitrateKbps:bitrate,hasAudio:true};},setBpm:args=>{const bpmVal=args.bpm||args.tempo||120;setBpm(String(bpmVal));return{success:true,bpm:bpmVal};},setPlayhead:args=>{const barDur=60/parseInt(bpm||120)*4;let time;if(args.time!==undefined&&args.time!==null)time=args.time;else if(args.bar!==undefined&&args.bar!==null)time=args.bar*barDur;else time=0;handlePlayheadSet(time);return{success:true,time:parseFloat(time.toFixed(3))};},exportAudio:async args=>{const currentTracks=window.DAWCommandDispatcher?.currentTracks||tracks;const currentSelTrackId=window.DAWCommandDispatcher?.currentSelectedTrackId||selectedTrackId;let tid=args.track_id;if(tid&&window.DAWCommandDispatcher?.lastCutSourceTrackId&&(String(tid)===String(window.DAWCommandDispatcher.lastCutSourceTrackId)||'track_'+tid===String(window.DAWCommandDispatcher.lastCutSourceTrackId))){tid=window.DAWCommandDispatcher.lastCutNewTrackId;}if(!tid)tid=currentSelTrackId;const track=tid&&currentTracks.find(t=>t.id===String(tid)||t.id==='track_'+tid);if(!track)return{success:false,error:'No track found'};const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default_'+track.id,buffer:track.buffer,startTime:track.startTime||0,name:track.name}]:[];if(clips.length===0)return{success:false,error:'Track has no audio clips'};const totalDuration=Math.max(...clips.map(c=>(c.startTime||0)+(c.buffer?c.buffer.duration/(c.speed||1.0):0)));const barDur=60/parseInt(bpm||120)*4;const sel=selectionRef.current;let rawStart,rawEnd;if(args.start_time!==undefined)rawStart=args.start_time;else if(args.start_bar!==undefined)rawStart=args.start_bar*barDur;else if(sel.start!==null)rawStart=sel.start;else rawStart=0;if(args.end_time!==undefined)rawEnd=args.end_time;else if(args.length_bars!==undefined)rawEnd=(rawStart||0)+args.length_bars*barDur;else if(args.end_bar!==undefined)rawEnd=args.end_bar*barDur;else if(sel.end!==null&&sel.end>rawStart)rawEnd=sel.end;else rawEnd=totalDuration;if(rawEnd<=rawStart)return{success:false,error:'Export range is empty or invalid.'};const ctx=getAudioContext();const sr=parseInt(args.sample_rate||'44100');const firstBuffer=clips.find(c=>c.buffer)?.buffer;const numCh=args.channels==='mono'?1:firstBuffer?firstBuffer.numberOfChannels:2;const bd=parseInt(args.bit_depth||'16');const fmt=args.format||'wav';const renderLength=rawEnd-rawStart;const offlineCtx=new OfflineAudioContext(numCh,Math.ceil(sr*renderLength),sr);clips.forEach(clip=>{if(!clip.buffer)return;const clipStart=clip.startTime||0;const clipDuration=clip.buffer.duration/(clip.speed||1.0);const clipEnd=clipStart+clipDuration;if(clipEnd<=rawStart||clipStart>=rawEnd)return;const source=offlineCtx.createBufferSource();source.buffer=clip.buffer;source.playbackRate.value=clip.speed||1.0;source.connect(offlineCtx.destination);if(rawStart<clipStart){const delay=clipStart-rawStart;const playDur=Math.min(clipDuration,rawEnd-clipStart);source.start(delay,0,playDur*(clip.speed||1.0));}else{const offsetInClip=rawStart-clipStart;const playDur=Math.min(clipEnd-rawStart,renderLength);source.start(0,offsetInClip*(clip.speed||1.0),playDur*(clip.speed||1.0));}});const renderedBuffer=await offlineCtx.startRendering();const len=renderedBuffer.length;const bps=bd/8;const hdrSz=44;const fileBuf=new ArrayBuffer(hdrSz+len*bps*numCh);const vw=new DataView(fileBuf);const ws=(off,s)=>{for(let i=0;i<s.length;i++)vw.setUint8(off+i,s.charCodeAt(i));};ws(0,'RIFF');vw.setUint32(4,fileBuf.byteLength-8,true);ws(8,'WAVE');ws(12,'fmt ');vw.setUint32(16,16,true);vw.setUint16(20,1,true);vw.setUint16(22,numCh,true);vw.setUint32(24,sr,true);vw.setUint32(28,sr*bps*numCh,true);vw.setUint16(32,bps*numCh,true);vw.setUint16(34,bd,true);ws(36,'data');vw.setUint32(40,len*bps*numCh,true);let ofs=44;for(let i=0;i<len;i++){for(let ch=0;ch<numCh;ch++){const smp=Math.max(-1,Math.min(1,renderedBuffer.getChannelData(ch)[i]));if(bd===8)vw.setUint8(ofs,Math.floor((smp+1)*127.5));else if(bd===16)vw.setInt16(ofs,Math.floor(smp<0?smp*0x8000:smp*0x7FFF),true);else{const v24=Math.floor(smp<0?smp*0x800000:smp*0x7FFFFF);vw.setUint8(ofs,v24&0xFF);vw.setUint8(ofs+1,v24>>8&0xFF);vw.setUint8(ofs+2,v24>>16&0xFF);}ofs+=bps;}}const blob=new Blob([fileBuf],{type:'audio/wav'});const localUrl=URL.createObjectURL(blob);const targetFilename=`export_${Date.now()}.${fmt}`;const triggerDownload=(downloadUrl,finalFilename)=>{if(window.DAWCommandDispatcher?.isExecutingAI){showToast(`Xuất nhạc thành công (${fmt.toUpperCase()})!`,"success","Tải về",()=>{const a=document.createElement('a');a.href=downloadUrl;a.download=finalFilename;a.click();if(downloadUrl.startsWith('blob:')){URL.revokeObjectURL(downloadUrl);}});}else{const a=document.createElement('a');a.href=downloadUrl;a.download=finalFilename;a.click();showToast("Xuất bản âm thanh hoàn tất!","success");if(downloadUrl.startsWith('blob:')){URL.revokeObjectURL(downloadUrl);}}};if((fmt==='mp3'||fmt==='ogg')&&serverStatus==='connected'){try{const file=new File([blob],`export_ai.wav`,{type:'audio/wav'});const formData=new FormData();formData.append('file',file);const uploadResp=await fetch(`${API_AUDIO}/upload`,{method:'POST',body:formData});if(!uploadResp.ok)throw new Error("Upload failed");const uploadData=await uploadResp.json();const uploadId=uploadData.file_id;const exportResp=await fetch(`${API_AUDIO}/export`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({file_id:uploadId,format:fmt,sample_rate:sr,bit_depth:bd})});if(!exportResp.ok)throw new Error("Export failed");const exportData=await exportResp.json();const result=await pollTaskResult(exportData.task_id,20);if(result.success){const downloadUrl=`${API_AUDIO}/download/${result.output_file_id}`;triggerDownload(downloadUrl,targetFilename);}else{throw new Error(result.error||'Server encoding failed');}}catch(transcodeErr){showToast(`Lỗi chuyển đổi: ${transcodeErr.message}. Tải về dạng WAV thay thế.`,"warning");triggerDownload(localUrl,`export_${Date.now()}.wav`);}}else{const finalFilename=fmt==='wav'?`export_${Date.now()}.wav`:`export_${Date.now()}.wav`;if(fmt!=='wav'){showToast("Đang ngoại tuyến. Tải về định dạng WAV thay thế.","warning");}triggerDownload(localUrl,finalFilename);}return{success:true,trackId:tid,range:parseFloat((rawEnd-rawStart).toFixed(3))+'s',format:fmt,channels:numCh===1?'mono':'stereo'};},selectItem:args=>{if(args.select_all){setSelectedTrackId(null);clearLocalSelection();setSelectionMode('global');setSelectionStart(0);const maxDur=tracks.reduce((max,t)=>{const dur=t.buffer?t.buffer.duration:0;const clips=t.clips||[];const clipMax=clips.reduce((m,c)=>Math.max(m,(c.startTime||0)+(c.buffer?c.buffer.duration:0)),0);return Math.max(max,dur,clipMax);},0);setSelectionEnd(Math.max(maxDur,currentTime+10));return{success:true,selection:'all',duration:parseFloat(Math.max(maxDur,currentTime+10).toFixed(3))};}const tid=args.track_id||selectedTrackId;const track=tracks.find(t=>t.id===tid);if(!track)return{success:false,error:`Track ${tid} not found`};const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default_'+track.id,name:track.name,buffer:track.buffer,startTime:track.startTime||0}]:[];if(args.item_name){const match=clips.find(c=>c.name&&c.name.toLowerCase().includes(args.item_name.toLowerCase()));if(!match)return{success:false,error:`No clip matching "${args.item_name}" on track ${track.name}`};setSelectedTrackId(tid);clearLocalSelection();setSelectionMode('global');const start=match.startTime||0;const end=start+(match.buffer?match.buffer.duration:2);setSelectionStart(start);setSelectionEnd(end);return{success:true,trackId:tid,trackName:track.name,clipId:match.id,clipName:match.name,start:parseFloat(start.toFixed(3)),end:parseFloat(end.toFixed(3))};}setSelectedTrackId(tid);clearLocalSelection();setSelectionMode('global');const trackEnd=track.buffer?track.buffer.duration:clips.length>0?Math.max(...clips.map(c=>(c.startTime||0)+(c.buffer?c.buffer.duration:0))):4;setSelectionStart(0);setSelectionEnd(trackEnd);return{success:true,trackId:tid,trackName:track.name,duration:parseFloat(trackEnd.toFixed(3))};},addMarker:args=>{const trackId=args.track_id||selectedTrackId;const time=args.time??currentTime;const track=tracks.find(t=>t.id===trackId);if(!track)return{success:false,error:'Track not found'};setTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;return{...t,markers:[...(t.markers||[]),{id:'ai_marker_'+Date.now(),time,label:args.label||'AI Marker'}]};}));return{success:true,trackId,time};},fadeIn:args=>{const currentTracks=window.DAWCommandDispatcher?.currentTracks||tracks;const currentSelTrackId=window.DAWCommandDispatcher?.currentSelectedTrackId||selectedTrackId;let trackIdRaw=args.track_id;if(trackIdRaw&&window.DAWCommandDispatcher?.lastCutSourceTrackId&&(String(trackIdRaw)===String(window.DAWCommandDispatcher.lastCutSourceTrackId)||'track_'+trackIdRaw===String(window.DAWCommandDispatcher.lastCutSourceTrackId))){trackIdRaw=window.DAWCommandDispatcher.lastCutNewTrackId;}if(!trackIdRaw)trackIdRaw=currentSelTrackId;const track=currentTracks.find(t=>t.id===String(trackIdRaw)||t.id==='track_'+trackIdRaw);if(!track)return{success:false,error:`Track ${trackIdRaw} not found`};const clips=track.clips&&track.clips.length>0?track.clips:track.buffer?[{id:'default_'+track.id,buffer:track.buffer,startTime:track.startTime||0,name:track.name}]:[];if(clips.length===0)return{success:false,error:'No clips on track'};let clip=null;if(args.clip_id){clip=clips.find(c=>c.id===args.clip_id);}else if(args.clip_index!==undefined){const idx=parseInt(args.clip_index);const realIdx=idx>0?idx-1:0;clip=clips[realIdx]||clips[0];}else{clip=clips[0];}if(!clip||!clip.buffer)return{success:false,error:'Clip has no audio buffer'};const duration=parseFloat(args.duration_seconds||3);const buffer=clip.buffer;const sr=buffer.sampleRate;const numChannels=buffer.numberOfChannels;const length=buffer.length;const ctx=getAudioContext();const newBuffer=ctx.createBuffer(numChannels,length,sr);for(let c=0;c<numChannels;c++){newBuffer.getChannelData(c).set(buffer.getChannelData(c));}const fadeSamples=Math.min(length,Math.floor(duration*sr));for(let c=0;c<numChannels;c++){const data=newBuffer.getChannelData(c);for(let i=0;i<fadeSamples;i++){const factor=(1-Math.cos(Math.PI*i/fadeSamples))/2;data[i]*=factor;}}const beforeSnap=captureTrackSnapshot(track.id);const nextTracks=currentTracks.map(t=>{if(t.id!==track.id)return t;const existingClips=t.clips&&t.clips.length>0?t.clips:t.buffer?[{id:'default_'+t.id,buffer:t.buffer,startTime:t.startTime||0,name:t.name}]:[];const 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durationSec=total_bars*secondsPerBar;updateActiveTracks(prev=>{let updatedTracks=[...prev];aiTracks.forEach(aiTrack=>{let targetTrack=updatedTracks.find(t=>t.name.toLowerCase()===aiTrack.track_name.toLowerCase());if(!targetTrack){const newId=(updatedTracks.length+1).toString();const colors=['#0f766e','#1d4ed8','#701a75','#a21caf','#b45309'];const selectColor=colors[updatedTracks.length%colors.length];targetTrack={id:newId,name:aiTrack.track_name,type:'MIDI',volumeDb:0,pan:0,muted:false,solo:false,color:selectColor,markers:[],serverFileId:null,clips:[],sections:[],midiItems:[],isArmed:false,monitoringEnabled:true,inputSource:{deviceType:'NONE',deviceId:''}};updatedTracks.push(targetTrack);}const itemStartTimeSec=currentTime;const newMidiItem={id:'item_ai_'+Date.now()+'_'+Math.random().toString(36).substr(2,5),name:`${composition_title||'AI Theme'} - ${aiTrack.track_name}`,startTime:itemStartTimeSec,duration:durationSec,notes:aiTrack.notes.map((note,index)=>({id:`note_ai_${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];});return updatedTracks;});showToast(`Đã nạp ${aiTracks.length} tracks MIDI thế hệ AI!`,'success');return{success:true};},createMidiItem:args=>{const trackId=args.track_id||selectedTrackId;if(!trackId)return{success:false,error:'No track_id provided'};const secondsPerBar=60.0/(parseInt(bpm)||120)*4;const startBar=args.start_bar!==undefined?parseFloat(args.start_bar):0;const lengthBars=args.length_bars!==undefined?parseFloat(args.length_bars):4;const midiItem={id:`midi_${Date.now()}_${Math.random().toString(36).substr(2,5)}`,name:'MIDI 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"+name)))))):(/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",{className:"flex justify-between items-center pb-3 border-b border-[#383838]"},/*#__PURE__*/React.createElement("h3",{className:"text-sm font-bold text-violet-400"},"Synth Selector")),/*#__PURE__*/React.createElement("div",{className:"mt-3 max-h-80 overflow-y-auto space-y-1"},/*#__PURE__*/React.createElement("button",{onClick:()=>setTrackInstrumentWithProgram(instrumentSelectorTrackId,null),className:"w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-zinc-700 text-zinc-400"},"None (Default Synth)"),/*#__PURE__*/React.createElement("div",{className:"text-[10px] text-zinc-500 mt-2 mb-1 uppercase font-bold"},"SoundFonts"),instrumentSelectorData?.soundfonts?.map((sf,i)=>/*#__PURE__*/React.createElement("button",{key:"sf_"+i,onClick:()=>setTrackInstrument(instrumentSelectorTrackId,"sf_"+sf.id,sf.display||sf.name||sf.id),className:"w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-amber-800 text-zinc-200 flex items-center justify-between"},/*#__PURE__*/React.createElement("span",null,sf.display||sf.name||sf.id),/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-amber-400"},"SoundFont"))),/*#__PURE__*/React.createElement("div",{className:"text-[10px] text-zinc-500 mt-2 mb-1 uppercase font-bold"},"VST Instruments"),instrumentSelectorData?.vst_instruments?.map((v,i)=>/*#__PURE__*/React.createElement("button",{key:"vst_"+i,onClick:()=>setTrackInstrumentWithProgram(instrumentSelectorTrackId,v.id,undefined,v.name||v.id),className:"w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-violet-900 text-zinc-200 flex items-center justify-between"},/*#__PURE__*/React.createElement("span",null,v.name||v.id),/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-cyan-400"},v.type))),(!instrumentSelectorData||!instrumentSelectorData.vst_instruments?.length&&!instrumentSelectorData.soundfonts?.length)&&/*#__PURE__*/React.createElement("p",{className:"text-xs text-zinc-500 py-4 text-center"},"No plugins available. Upload SoundFont via Tools \u2192 Plugin Manager.")))))));};const root=ReactDOM.createRoot(document.getElementById('root'));root.render(/*#__PURE__*/React.createElement(App,null));setTimeout(()=>lucide.createIcons(),300);
diff --git a/app/static/js/services/soundfontPlayer.js b/app/static/js/services/soundfontPlayer.js
index 49d4d2a..bb85c7e 100644
--- a/app/static/js/services/soundfontPlayer.js
+++ b/app/static/js/services/soundfontPlayer.js
@@ -2,20 +2,30 @@
 (function () {
     'use strict';
 
-    // Web Audio API fallback synth
-    let audioCtx = null;
-    let gainNode = null;
     const activeOscillators = {};
 
-    function getCtx() {
-        if (!audioCtx) {
-            audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-            gainNode = audioCtx.createGain();
-            gainNode.gain.value = 0.3;
-            gainNode.connect(audioCtx.destination);
+    // Use the shared AudioContext from the main app (lazy init)
+    let __gainNode = null;
+    const getCtx = () => {
+        if (typeof getAudioContext === 'function') {
+            const ctx = getAudioContext();
+            if (!__gainNode) {
+                __gainNode = ctx.createGain();
+                __gainNode.gain.value = 0.3;
+                __gainNode.connect(ctx.destination);
+            }
+            return ctx;
         }
-        return audioCtx;
-    }
+        if (!window.__sharedAudioCtx) {
+            window.__sharedAudioCtx = new (window.AudioContext || window.webkitAudioContext)();
+        }
+        if (!__gainNode) {
+            __gainNode = window.__sharedAudioCtx.createGain();
+            __gainNode.gain.value = 0.3;
+            __gainNode.connect(window.__sharedAudioCtx.destination);
+        }
+        return window.__sharedAudioCtx;
+    };
 
     const SonicSF = {
         loadedFonts: {},
@@ -131,7 +141,7 @@
 
             osc.connect(noteGain);
             
-            const dest = destinationNode || gainNode || ctx.destination;
+            const dest = destinationNode || __gainNode || ctx.destination;
             noteGain.connect(dest);
 
             osc.start(startAt);
diff --git a/app/storage/sonicforge.db b/app/storage/sonicforge.db
index 0d14dc986069e516e8374a7e666989e578ab0f53..d0884b1846b73b8645c2f92c371e1687db42ddc9 100644
GIT binary patch
delta 2463
zcma);y>A>v0L5?5M8sBnmqZ8)MT(9C2^9N|`JSBwaQFl0xC&We_Uk_E+p}-?oY=96
zU6_IbIocFyf)Eu22qjn1(eW41AOsZ1Elos|0%kYz?d*DO-xXWj&i>}jdv9iU@2~RS
zH#3LVE>ugU()`2PvQd5d+4}Xj8S%Kog={eDhz1c<Hl!zD14=?{%ON)Otmygm{)2;~
zKmPrFf5Dh*E!^6lU%2?{ESJ<1HUJGrSfoK5mo_X)ordKi3s}gqJ%>oA-}RHr?O@<{
zZErAayUidRIo*LRphbjaToTXY5_&=iY7)uRv<?u6TS7`4&p?D#vx&((1YO}`rZiF8
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S{K;I!QC}}#yte(zum1ziqxFUW

delta 747
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E0nzB*1ONa4

diff --git a/app/storage/soundfonts/57e324e5-bea6-4937-88e0-cb6e4ef51832.meta b/app/storage/soundfonts/57e324e5-bea6-4937-88e0-cb6e4ef51832.meta
new file mode 100644
index 0000000..fcdd7c0
--- /dev/null
+++ b/app/storage/soundfonts/57e324e5-bea6-4937-88e0-cb6e4ef51832.meta
@@ -0,0 +1 @@
+{"original_name": "General_GS_57e3", "uuid": "57e324e5-bea6-4937-88e0-cb6e4ef51832", "file": "57e324e5-bea6-4937-88e0-cb6e4ef51832.sf2"}
\ No newline at end of file
diff --git a/app/templates/index.html b/app/templates/index.html
index 5e94fe7..30ead48 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -10,13 +10,13 @@
     <script src="https://unpkg.com/lucide@latest"></script>
     <script src="https://unpkg.com/react@18.3.1/umd/react.production.min.js"></script>
     <script src="https://unpkg.com/react-dom@18.3.1/umd/react-dom.production.min.js"></script>
-    <script src="/static/js/services/api.js?v=202607231850"></script>
-    <script src="/static/js/services/audioEngine.js?v=202607231850"></script>
-    <script src="/static/js/services/storage.js?v=202607231850"></script>
-    <script src="/static/js/services/soundfontPlayer.js?v=202607231850"></script>
-    <script src="/static/js/services/aiGateway.js?v=202607231850"></script>
-    <script src="/static/js/services/dawCommandDispatcher.js?v=202607231850"></script>
-    <script src="/static/js/app.precompiled.js?v=202607231850" defer></script>
+    <script src="/static/js/services/api.js?v=202607232030"></script>
+    <script src="/static/js/services/audioEngine.js?v=202607232030"></script>
+    <script src="/static/js/services/storage.js?v=202607232030"></script>
+    <script src="/static/js/services/soundfontPlayer.js?v=202607232030"></script>
+    <script src="/static/js/services/aiGateway.js?v=202607232030"></script>
+    <script src="/static/js/services/dawCommandDispatcher.js?v=202607232030"></script>
+    <script src="/static/js/app.precompiled.js?v=202607232030" defer></script>
     <style>
         :root {
             --right-sidebar-width: 320px;