diff --git a/app/api/v1/plugins.py b/app/api/v1/plugins.py
index 27c27f6..8073c08 100644
--- a/app/api/v1/plugins.py
+++ b/app/api/v1/plugins.py
@@ -716,7 +716,7 @@ async def open_fx_gui(req: FxGuiRequest, current_user: dict = Depends(get_curren
     # đang chạy → trả started=False (frontend có thể focus window cũ).
     for proc in _FX_GUI_PROCESSES:
         if proc is not None and proc.poll() is None and getattr(proc, "_sf_plugin_path", None) == plugin_path:
-            return {"success": True, "started": False, "already_running": True, "cmd": []}
+            return {"success": True, "started": False, "already_running": True, "cmd": [], "embed_url": getattr(proc, "_sf_embed_url", None) or None}
     job = {"path": plugin_path, "name": req.name or os.path.basename(plugin_path)}
     fd, job_path = tempfile.mkstemp(prefix="sf_fx_gui_", suffix=".json", dir=tempfile.gettempdir())
     try:
diff --git a/app/core/vst_engine.py b/app/core/vst_engine.py
index 1de2533..cc627e2 100644
--- a/app/core/vst_engine.py
+++ b/app/core/vst_engine.py
@@ -1,6 +1,7 @@
 # SonicForge Studio VST / VSTi Engine Service
 import os
 import json
+import re
 import numpy as np
 import functools
 import threading
@@ -271,6 +272,21 @@ def release_soundfont(path: str):
     else:
         _FLUID_CACHE[path] = (fl, ref - 1)
 
+def _classify_fx_category(name, path=""):
+    """Heuristic phân loại VST FX cho Plugin Picker (spec vst_fx_panel_integration).
+    C++ scan có subCategoriesString (VD 'Fx|EQ') nhưng không emit ra JSON; dùng
+    tên plugin để xếp category. Chỉ ảnh hưởng UI grouping, không ảnh hưởng audio."""
+    s = (" " + name + " " + path).lower()
+    if any(k in s for k in ("eq", "equalizer", "filter", "graphic", "parametric")) or re.search(r"(^|[^a-z0-9])q([0-9]|[^a-z]|$)", s):
+        return "equalizer"
+    if any(k in s for k in ("reverb", "delay", "echo", "chorus", "hall", "space")):
+        return "reverb_delay"
+    if any(k in s for k in ("comp", "limiter", "maximizer", "gate", "leveler", "de-ess")):
+        return "comp_limiter"
+    if any(k in s for k in ("distortion", "drive", "satur", "overdrive", "fuzz", "amp")):
+        return "distortion"
+    return "utility"
+
 class PluginManager:
     def __init__(self, vst_dir=None, sf_dir=None, upload_sf_dir=None, extra_vst_dirs=None):
         from app.config import settings as _st
@@ -491,7 +507,8 @@ class PluginManager:
                         continue
                     name = p.get("name") or os.path.splitext(os.path.basename(path))[0]
                     results.append({"id": name, "name": name, "path": path,
-                                    "type": p.get("type", "VST3")})
+                                    "type": p.get("type", "VST3"),
+                                    "category": _classify_fx_category(name, path)})
         seen, uniq = set(), []
         for fx in results:
             if fx["path"] in seen:
diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index 2e9f243..d0cee79 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -11958,26 +11958,68 @@ const ExportModal = ({ open, onClose, exportSettings, setExportSettings, isExpor
     );
   };
 
-  const vstRow = (s, idx, toggleV, changeV, uploadV, moveV, removeV, fxl, chainLen, openGui, showCarla = true) => (
-    <div key={idx} className="flex items-center gap-2 bg-slate-900/60 border border-slate-800 rounded-lg px-2 py-1.5 flex-wrap">
-      <button onClick={() => toggleV(idx)} className={`w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0 ${!s.bypass ? 'bg-teal-500 text-slate-950' : 'bg-slate-700 text-slate-300'}`} title={s.bypass ? 'Bypass' : 'Active'}>
+  const vstRow = (s, idx, toggleV, changeV, uploadV, moveV, removeV, fxl, chainLen, openGui, showCarla = true, activeIdx = -1, onSelect = null) => (
+    <div key={idx} onClick={() => onSelect && onSelect(s, idx)} className={`flex items-center gap-2 bg-slate-900/60 border rounded-lg px-2 py-1.5 flex-wrap cursor-pointer transition-all ${activeIdx === idx ? 'border-teal-400 bg-slate-800/80' : 'border-slate-800 hover:border-slate-600'}`}>
+      <button onClick={e => { e.stopPropagation(); toggleV(idx); }} className={`w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0 ${!s.bypass ? 'bg-teal-500 text-slate-950' : 'bg-slate-700 text-slate-300'}`} title={s.bypass ? 'Bypass' : 'Active'}>
         <i data-lucide="power" className="w-2.5 h-2.5"></i>
       </button>
       <span className="text-[10px] font-bold text-slate-300 font-mono w-6 shrink-0">{idx + 1}</span>
-      <select value={s.path || ''} onChange={e => changeV(idx, e.target.value)} className="flex-1 min-w-[200px] bg-slate-950 border border-slate-700 text-teal-300 rounded px-2 py-1 text-[11px] outline-none focus:border-teal-500">
+      <select value={s.path || ''} onClick={e => e.stopPropagation()} onChange={e => changeV(idx, e.target.value)} className="flex-1 min-w-[200px] bg-slate-950 border border-slate-700 text-teal-300 rounded px-2 py-1 text-[11px] outline-none focus:border-teal-500">
         <option value="">— Chọn VST FX —</option>
         {(fxl || []).map(f => <option key={f.path} value={f.path}>{f.name || f.id}</option>)}
       </select>
       <span className={`text-[9px] font-mono ${s.preset_b64 ? 'text-emerald-400' : 'text-slate-600'}`}>{s.preset_b64 ? '✓ preset' : 'no preset'}</span>
-      <button onClick={() => uploadV(idx)} className="px-2 py-1 bg-slate-800 hover:bg-slate-700 text-slate-300 text-[10px] font-semibold rounded transition" title="Upload .vstpreset (Save preset)">Preset</button>
-      {openGui && <button onClick={() => openGui(s)} disabled={!s.path} className="px-2 py-1 bg-violet-800 hover:bg-violet-700 disabled:opacity-30 text-violet-100 text-[10px] font-semibold rounded transition" title="Mở GUI của VST (chỉnh thông số trực tiếp)"><i data-lucide="monitor" className="w-3 h-3"></i> GUI</button>}
-      {showCarla && <button onClick={() => { if (!s.path) { window.showToast && window.showToast('Chọn VST FX trước', 'warning'); return; } window.SonicAPI.openInCarla(s.name || s.path, s.path).then(r => { if (r && r.success) window.showToast && window.showToast('Đã mở Carla với ' + (s.name || s.path) + ' — chỉnh âm trong Carla rồi Save preset', 'success'); else window.showToast && window.showToast('Không mở được Carla', 'error'); }).catch(err => window.showToast && window.showToast('Lỗi mở Carla: ' + (err.message || err), 'error')); }} className="px-2 py-1 bg-teal-800 hover:bg-teal-700 text-teal-100 text-[10px] font-semibold rounded transition" title="Mở native GUI trong Carla">Carla</button>}
-      <button onClick={() => moveV(idx, -1)} disabled={idx === 0} className="w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30" title="Lên"><i data-lucide="chevron-up" className="w-3 h-3"></i></button>
-      <button onClick={() => moveV(idx, 1)} disabled={idx === chainLen - 1} className="w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30" title="Xuống"><i data-lucide="chevron-down" className="w-3 h-3"></i></button>
-      <button onClick={() => removeV(idx)} className="text-slate-600 hover:text-red-400 text-xs px-0.5" title="Xóa slot"><i data-lucide="x" className="w-3 h-3"></i></button>
+      <button onClick={e => { e.stopPropagation(); uploadV(idx); }} className="px-2 py-1 bg-slate-800 hover:bg-slate-700 text-slate-300 text-[10px] font-semibold rounded transition" title="Upload .vstpreset (Save preset)">Preset</button>
+      {openGui && <button onClick={e => { e.stopPropagation(); openGui(s, idx); }} disabled={!s.path} className="px-2 py-1 bg-violet-800 hover:bg-violet-700 disabled:opacity-30 text-violet-100 text-[10px] font-semibold rounded transition" title="Mở GUI của VST (chỉnh thông số trực tiếp)"><i data-lucide="monitor" className="w-3 h-3"></i> GUI</button>}
+      {showCarla && <button onClick={e => { e.stopPropagation(); if (!s.path) { window.showToast && window.showToast('Chọn VST FX trước', 'warning'); return; } window.SonicAPI.openInCarla(s.name || s.path, s.path).then(r => { if (r && r.success) window.showToast && window.showToast('Đã mở Carla với ' + (s.name || s.path) + ' — chỉnh âm trong Carla rồi Save preset', 'success'); else window.showToast && window.showToast('Không mở được Carla', 'error'); }).catch(err => window.showToast && window.showToast('Lỗi mở Carla: ' + (err.message || err), 'error')); }} className="px-2 py-1 bg-teal-800 hover:bg-teal-700 text-teal-100 text-[10px] font-semibold rounded transition" title="Mở native GUI trong Carla">Carla</button>}
+      <button onClick={e => { e.stopPropagation(); moveV(idx, -1); }} disabled={idx === 0} className="w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30" title="Lên"><i data-lucide="chevron-up" className="w-3 h-3"></i></button>
+      <button onClick={e => { e.stopPropagation(); moveV(idx, 1); }} disabled={idx === chainLen - 1} className="w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30" title="Xuống"><i data-lucide="chevron-down" className="w-3 h-3"></i></button>
+      <button onClick={e => { e.stopPropagation(); removeV(idx); }} className="text-slate-600 hover:text-red-400 text-xs px-0.5" title="Xóa slot"><i data-lucide="x" className="w-3 h-3"></i></button>
     </div>
   );
 
+  // ── VST FX Plugin Picker (spec vst_fx_panel_integration.md §II) ──────────
+  // Modal chọn VST FX theo category (heuristic từ backend list_fx.category).
+  // Dùng chung FXRackModal + MasteringModal: [+] → picker → chèn VST card.
+  const VST_FX_CATEGORIES = [
+    { id: 'all', label: 'Tất cả' },
+    { id: 'equalizer', label: 'Equalizers / Dynamic EQ' },
+    { id: 'reverb_delay', label: 'Reverbs & Delays' },
+    { id: 'comp_limiter', label: 'Compressors & Limiters' },
+    { id: 'distortion', label: 'Distortion / Saturation' },
+    { id: 'utility', label: 'Utility' }
+  ];
+  const VstPluginPicker = ({ open, onClose, plugins, onPick }) => {
+    const [cat, setCat] = React.useState('all');
+    React.useEffect(() => { if (open) setCat('all'); }, [open]);
+    if (!open) return null;
+    const list = (plugins || []).filter(p => cat === 'all' || (p.category || 'utility') === cat);
+    return (
+      <div className="fixed inset-0 z-[125] bg-black/80 backdrop-blur-sm flex items-center justify-center p-4" onClick={onClose}>
+        <div className="w-full max-w-2xl bg-slate-900 border border-slate-700 rounded-2xl p-5 space-y-4 shadow-2xl max-h-[80vh] flex flex-col" onClick={e => e.stopPropagation()}>
+          <div className="flex items-center justify-between border-b border-slate-800 pb-3">
+            <h3 className="text-xs font-bold text-white uppercase tracking-wider font-mono">CHỌN VST FX — PLUGIN PICKER</h3>
+            <button onClick={onClose} className="text-slate-400 hover:text-white"><i data-lucide="x" className="w-4 h-4"></i></button>
+          </div>
+          <div className="flex flex-wrap gap-1.5 shrink-0">
+            {VST_FX_CATEGORIES.map(c => (
+              <button key={c.id} onClick={() => setCat(c.id)} className={`px-2.5 py-1 rounded text-[10px] font-semibold transition ${cat === c.id ? 'bg-teal-700 text-white' : 'bg-slate-800 hover:bg-slate-700 text-slate-300'}`}>{c.label}</button>
+            ))}
+          </div>
+          <div className="flex-1 overflow-y-auto oz-scrollbar grid grid-cols-2 gap-2">
+            {list.length === 0 && <div className="col-span-2 text-[11px] text-slate-500 font-mono py-10 text-center">Không có VST FX trong mục này.</div>}
+            {list.map(f => (
+              <button key={f.path} onClick={() => { onPick(f); onClose(); }} className="p-2 bg-slate-950 hover:bg-slate-800 border border-slate-800 rounded-lg text-left space-y-0.5 transition-colors">
+                <div className="text-[11px] font-bold text-teal-300 flex items-center gap-1.5"><i data-lucide="plug" className="w-3 h-3"></i> {f.name || f.id}</div>
+                <div className="text-[9px] text-slate-500 font-mono truncate">{f.path}</div>
+              </button>
+            ))}
+          </div>
+        </div>
+      </div>
+    );
+  };
+
 const FXRackModal = ({ track, onUpdateTrack, onClose }) => {
   const [activeType, setActiveType] = React.useState('eq');
   const [addModuleOpen, setAddModuleOpen] = React.useState(false);
@@ -12002,7 +12044,8 @@ const FXRackModal = ({ track, onUpdateTrack, onClose }) => {
   }, [track && track.id]);
   const previewAudioRef = React.useRef(null);
   const [vstBypass, setVstBypass] = React.useState(!!(track && track.vstFxBypass));
-  const [addVstSel, setAddVstSel] = React.useState('');
+  const [activeVstIdx, setActiveVstIdx] = React.useState(-1);
+  const [vstPickerOpen, setVstPickerOpen] = React.useState(false);
 
   if (!track) return null;
 
@@ -12018,11 +12061,10 @@ const FXRackModal = ({ track, onUpdateTrack, onClose }) => {
   };
   React.useEffect(() => () => { if (fxGuiOpen) { try { fetch(fxGuiOpen.url + '/close', { method: 'POST' }).catch(() => {}); } catch (e) {} } }, []);
   const toggleVst = (idx) => setVstChain(vstChain.map((s, i) => i === idx ? { ...s, bypass: !s.bypass } : s));
-  const removeVst = (idx) => setVstChain(vstChain.filter((_, i) => i !== idx));
+  const removeVst = (idx) => { const rem = vstChain[idx]; if (rem && fxGuiOpen && fxGuiOpen.path === rem.path) closeFxGui(); if (idx === activeVstIdx) setActiveVstIdx(-1); setVstChain(vstChain.filter((_, i) => i !== idx)); };
   const moveVst = (idx, dir) => { const j = idx + dir; if (j < 0 || j >= vstChain.length) return; const next = [...vstChain]; const mv = next.splice(idx, 1)[0]; next.splice(j, 0, mv); setVstChain(next); };
-  const openVstGui = (s) => { if (!s || !s.path) { window.showToast && window.showToast('Chọn VST FX trước', 'warning'); return; } if (fxGuiOpen) closeFxGui(); if (!window.SonicAPI || !window.SonicAPI.openFxGui) { window.showToast && window.showToast('Máy này không hỗ trợ mở GUI VST', 'warning'); return; } window.SonicAPI.openFxGui({ path: s.path, name: s.name || s.path, embed: true }).then(r => { if (r && r.success && r.embed_url) setFxGuiOpen({ path: s.path, url: r.embed_url }); else if (r && r.already_running) window.showToast && window.showToast('GUI của plugin này đang mở sẵn', 'info'); else window.showToast && window.showToast('Không mở được GUI embed', 'error'); }).catch(err => window.showToast && window.showToast('Lỗi mở GUI: ' + (err.message || err), 'error')); };
-const addVst = (path) => { const fx = (fxList || []).find(f => f.path === path); if (!fx) return; setVstChain([...vstChain, { type: 'vst3', path: fx.path, name: fx.name || fx.id, preset_b64: '', bypass: false }]);
-    openVstGui({ path: fx.path, name: fx.name || fx.id }); };
+  const openVstGui = (s, idx) => { if (!s || !s.path) { window.showToast && window.showToast('Chọn VST FX trước', 'warning'); return; } if (fxGuiOpen) closeFxGui(); if (idx !== undefined) setActiveVstIdx(idx); if (!window.SonicAPI || !window.SonicAPI.openFxGui) { window.showToast && window.showToast('Máy này không hỗ trợ mở GUI VST', 'warning'); return; } window.SonicAPI.openFxGui({ path: s.path, name: s.name || s.path, embed: true }).then(r => { if (r && r.embed_url) setFxGuiOpen({ path: s.path, url: r.embed_url }); else if (r && r.already_running) window.showToast && window.showToast('GUI của plugin này đang mở sẵn (cửa sổ ngoài)', 'info'); else window.showToast && window.showToast('Không mở được GUI embed', 'error'); }).catch(err => window.showToast && window.showToast('Lỗi mở GUI: ' + (err.message || err), 'error')); };
+const addVst = (path) => { const fx = (fxList || []).find(f => f.path === path); if (!fx) return; const next = [...vstChain, { type: 'vst3', path: fx.path, name: fx.name || fx.id, preset_b64: '', bypass: false }]; setVstChain(next); setActiveVstIdx(next.length - 1); };
   const changeVstPlugin = (idx, path) => { const fx = (fxList || []).find(f => f.path === path); setVstChain(vstChain.map((s, i) => i === idx ? { ...s, path, name: fx ? (fx.name || fx.id) : s.name, preset_b64: '' } : s)); };
   const uploadVstPreset = (idx) => {
     const inp = document.createElement('input');
@@ -12304,7 +12346,7 @@ const addVst = (path) => { const fx = (fxList || []).find(f => f.path === path);
                 onDragStart={e => { dragChainIndexRef.current = idx; e.dataTransfer.effectAllowed = 'move'; }}
                 onDragOver={e => { e.preventDefault(); e.dataTransfer.dropEffect = 'move'; }}
                 onDrop={e => { e.preventDefault(); const from = dragChainIndexRef.current; if (from !== null && from !== idx) { const next = [...chain]; const mv = next.splice(from, 1)[0]; next.splice(idx, 0, mv); setChain(next); } dragChainIndexRef.current = null; }}
-                onClick={() => setActiveType(m.type)}
+                onClick={() => { closeFxGui(); setActiveType(m.type); }}
                 className={`w-36 h-12 rounded-lg p-2 flex items-center justify-between cursor-pointer transition-all shrink-0 ${activeType === m.type ? 'border-2 border-cyan-400 bg-slate-800' : 'bg-slate-900 border border-slate-800 hover:border-slate-600'}`}>
                 <div className="flex items-center gap-2 min-w-0">
                   <button onClick={e => { e.stopPropagation(); toggleMod(idx); }} className="w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0" style={{ backgroundColor: on ? '#38bdf8' : '#334155', color: on ? '#0f172a' : '#94a3b8' }}>
@@ -12343,16 +12385,15 @@ const addVst = (path) => { const fx = (fxList || []).find(f => f.path === path);
             </div>
           </div>
           {vstChain.length === 0 && <div className="text-[10px] text-slate-500 font-mono">Chưa có VST FX — chọn plugin bên dưới để thêm vào insert chain (WebAudio chain → VST FX → Fader).</div>}
-          {vstChain.map((s, idx) => vstRow(s, idx, toggleVst, changeVstPlugin, uploadVstPreset, moveVst, removeVst, fxList, vstChain.length, openVstGui, false))}
-          <select value={addVstSel} onChange={e => { setAddVstSel(e.target.value); if (e.target.value) { addVst(e.target.value); setAddVstSel(''); } }} className="w-full bg-slate-950 border border-dashed border-slate-700 hover:border-teal-600 text-teal-300 rounded px-2 py-1.5 text-[11px] outline-none" title="Thêm VST FX">
-            <option value="">+ Thêm VST FX...</option>
-            {(fxList || []).map(f => <option key={f.path} value={f.path}>{f.name || f.id}</option>)}
-          </select>
+          {vstChain.map((s, idx) => vstRow(s, idx, toggleVst, changeVstPlugin, uploadVstPreset, moveVst, removeVst, fxList, vstChain.length, openVstGui, false, activeVstIdx, (s2, i2) => openVstGui(s2, i2)))}
+          <button onClick={() => setVstPickerOpen(true)} className="w-full bg-slate-950 border border-dashed border-slate-700 hover:border-teal-600 text-teal-300 rounded px-2 py-1.5 text-[11px] outline-none text-left" title="Thêm VST FX (Plugin Picker theo category)">
+            <i data-lucide="plus" className="w-3 h-3 inline-block mr-1"></i> Thêm VST FX... (Picker: EQ / Reverb / Comp / Utility)
+          </button>
         </div>
 
         {/* WORKSPACE CONTROLS */}
         {fxGuiOpen ? (
-          <div className="p-4">
+          <div className="flex-1 min-h-0">
             <VstGuiEmbed url={fxGuiOpen.url} onClose={closeFxGui}
               onDead={() => { window.showToast && window.showToast('Bridge VST GUI đã mất kết nối — trả về graph', 'error'); closeFxGui(); }} />
           </div>
@@ -12526,6 +12567,7 @@ const addVst = (path) => { const fx = (fxList || []).find(f => f.path === path);
           </div>
         </div>
       )}
+      <VstPluginPicker open={vstPickerOpen} onClose={() => setVstPickerOpen(false)} plugins={fxList} onPick={(f) => addVst(f.path)} />
     </div>
   );
 };
@@ -12549,15 +12591,17 @@ const MasteringModal = ({ isOpen, onClose, masteringSettings, setMasteringSettin
   const masterVstChain = (ozState.vstFxChain || []);
   // Embedded VST GUI state (PLAN_MASTERBUS_VST_GUI_EMBED.md Phase 2)
   const [masterGuiOpen, setMasterGuiOpen] = React.useState(null); // { path, url } | null
+  const [activeMasterVstPath, setActiveMasterVstPath] = React.useState(null);
   const closeMasterGui = () => {
     if (masterGuiOpen) { try { fetch(masterGuiOpen.url + '/close', { method: 'POST' }).catch(() => {}); } catch (e) {} setMasterGuiOpen(null); }
+    setActiveMasterVstPath(null);
   };
   React.useEffect(() => () => { if (masterGuiOpen) { try { fetch(masterGuiOpen.url + '/close', { method: 'POST' }).catch(() => {}); } catch (e) {} } }, []);
   const setMasterVstChain = (next) => setOzState(prev => ({ ...prev, vstFxChain: next }));
   const toggleMasterVst = (idx) => setMasterVstChain(masterVstChain.map((s, i) => i === idx ? { ...s, bypass: !s.bypass } : s));
   const removeMasterVst = (idx) => setMasterVstChain(masterVstChain.filter((_, i) => i !== idx));
   const moveMasterVst = (idx, dir) => { const j = idx + dir; if (j < 0 || j >= masterVstChain.length) return; const next = [...masterVstChain]; const mv = next.splice(idx, 1)[0]; next.splice(j, 0, mv); setMasterVstChain(next); };
-  const openMasterVstGui = (s) => { if (!s || !s.path) { window.showToast && window.showToast('Chọn VST FX trước', 'warning'); return; } if (masterGuiOpen) closeMasterGui(); if (!window.SonicAPI || !window.SonicAPI.openFxGui) { window.showToast && window.showToast('Máy này không hỗ trợ mở GUI VST', 'warning'); return; } window.SonicAPI.openFxGui({ path: s.path, name: s.name || s.path, embed: true }).then(r => { if (r && r.success && r.embed_url) setMasterGuiOpen({ path: s.path, url: r.embed_url }); else if (r && r.already_running) window.showToast && window.showToast('GUI của plugin này đang mở sẵn', 'info'); else window.showToast && window.showToast('Không mở được GUI embed', 'error'); }).catch(err => window.showToast && window.showToast('Lỗi mở GUI: ' + (err.message || err), 'error')); };
+  const openMasterVstGui = (s) => { if (!s || !s.path) { window.showToast && window.showToast('Chọn VST FX trước', 'warning'); return; } if (masterGuiOpen) closeMasterGui(); if (s.path) setActiveMasterVstPath(s.path); if (!window.SonicAPI || !window.SonicAPI.openFxGui) { window.showToast && window.showToast('Máy này không hỗ trợ mở GUI VST', 'warning'); return; } window.SonicAPI.openFxGui({ path: s.path, name: s.name || s.path, embed: true }).then(r => { if (r && r.embed_url) setMasterGuiOpen({ path: s.path, url: r.embed_url }); else if (r && r.already_running) window.showToast && window.showToast('GUI của plugin này đang mở sẵn (cửa sổ ngoài)', 'info'); else window.showToast && window.showToast('Không mở được GUI embed', 'error'); }).catch(err => window.showToast && window.showToast('Lỗi mở GUI: ' + (err.message || err), 'error')); };
 const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.path === path); if (!fx) return; setMasterVstChain([...masterVstChain, { type: 'vst3', path: fx.path, name: fx.name || fx.id, preset_b64: '', bypass: false }]);
     openMasterVstGui({ path: fx.path, name: fx.name || fx.id }); };
   const changeMasterVstPlugin = (idx, path) => { const fx = (masterFxList || []).find(f => f.path === path); setMasterVstChain(masterVstChain.map((s, i) => i === idx ? { ...s, path, name: fx ? (fx.name || fx.id) : s.name, preset_b64: '' } : s)); };
@@ -12609,6 +12653,7 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
   }, []);
   const previewAudioRef = React.useRef(null);
   const [addMasterVstSel, setAddMasterVstSel] = React.useState('');
+  const [masterVstPickerOpen, setMasterVstPickerOpen] = React.useState(false);
 
   // Wave Observer Refs & States
   const woCanvasRef = React.useRef(null);
@@ -13114,6 +13159,8 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
     });
   };
   const removeChainModule = (modId) => {
+    const removedMod = (ozState.chain || []).find(m => m.id === modId);
+    if (removedMod && removedMod.type === 'vst3' && masterGuiOpen && masterGuiOpen.path === removedMod.path) closeMasterGui();
     setOzState(prev => {
       const removed = prev.chain.find(m => m.id === modId);
       let chain = prev.chain.filter(m => m.id !== modId);
@@ -13302,7 +13349,7 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
           {(ozState.chain || []).map((mod, idx) => {
             const isVst = mod.type === 'vst3';
             const meta = MODULE_META[mod.type] || { name: mod.type, sub: '', icon: 'circle', color: '#94a3b8' };
-            const isEditing = !isVst && ozState.activeModule === mod.type;
+            const isEditing = (!isVst && ozState.activeModule === mod.type) || (isVst && activeMasterVstPath === mod.path);
             const isOn = isVst ? mod.active !== false : chainActive(mod.type);
             return (
               <div key={mod.id}
@@ -13310,7 +13357,7 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
                 onDragStart={e => { dragChainIndexRef.current = idx; e.dataTransfer.effectAllowed = 'move'; }}
                 onDragOver={e => { e.preventDefault(); e.dataTransfer.dropEffect = 'move'; }}
                 onDrop={e => { e.preventDefault(); const from = dragChainIndexRef.current; if (from !== null && from !== idx) reorderChain(from, idx); dragChainIndexRef.current = null; }}
-                onClick={() => { if (mod.type === 'vst3') { openMasterVstGui({ path: mod.path, name: mod.name || mod.path }); } else switchModule(mod.type); }}
+                onClick={() => { if (mod.type === 'vst3') { openMasterVstGui({ path: mod.path, name: mod.name || mod.path }); } else { closeMasterGui(); switchModule(mod.type); } }}
                 className={`w-40 h-12 rounded-lg p-2 flex items-center justify-between cursor-pointer transition-all shrink-0 ${isEditing ? 'oz-card-active' : 'oz-card'}`}>
                 <div className="flex items-center gap-2 min-w-0">
                   <button onClick={e => { e.stopPropagation(); toggleChainModule(mod.id); }} className="w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0" style={{backgroundColor: isOn ? '#38bdf8' : '#334155', color: isOn ? '#0f172a' : '#94a3b8'}}>
@@ -13341,7 +13388,7 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
 
           {/* LEFT: MODULE VIEWS */}
           {masterGuiOpen ? (
-            <div className="flex-1 flex flex-col bg-slate-950 relative overflow-y-auto oz-scrollbar p-4">
+            <div className="flex-1 flex flex-col bg-slate-950 relative min-h-0">
               <VstGuiEmbed url={masterGuiOpen.url} onClose={closeMasterGui}
                 onDead={() => { window.showToast && window.showToast('Bridge VST GUI đã mất kết nối — trả về graph', 'error'); closeMasterGui(); }} />
             </div>
@@ -13843,22 +13890,16 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
                 </button>
               ))}
             </div>
-            {(masterFxList || []).length > 0 && (
-              <div className="border-t border-slate-800 pt-3">
-                <div className="text-[10px] font-bold text-teal-400 uppercase tracking-wider oz-font-mono mb-2">VST FX (Ozone...)</div>
-                <div className="grid grid-cols-2 gap-2">
-                  {masterFxList.map(f => (
-                    <button key={f.path} onClick={() => addVstToChain(f.path)} className="p-2 bg-slate-950 hover:bg-slate-800 border border-slate-800 rounded-lg text-left space-y-0.5 transition-colors">
-                      <div className="text-[11px] font-bold text-teal-300 flex items-center gap-1.5"><i data-lucide="plug" className="w-3 h-3"></i> {f.name || f.id}</div>
-                      <div className="text-[9px] text-slate-500 font-mono truncate">{f.path}</div>
-                    </button>
-                  ))}
-                </div>
-              </div>
-            )}
+            <div className="border-t border-slate-800 pt-3">
+              <div className="text-[10px] font-bold text-teal-400 uppercase tracking-wider oz-font-mono mb-2">VST FX (Ozone...)</div>
+              <button onClick={() => setMasterVstPickerOpen(true)} className="w-full bg-slate-950 hover:bg-slate-800 border border-dashed border-slate-700 hover:border-teal-600 text-teal-300 rounded px-2 py-2 text-[11px] text-left transition-colors" title="Plugin Picker theo category (EQ / Reverb / Comp / Utility)">
+                <i data-lucide="plug" className="w-3 h-3 inline-block mr-1"></i> Chọn VST FX từ thư viện — Picker: EQ / Reverb / Comp / Utility
+              </button>
+            </div>
           </div>
         </div>
       )}
+      <VstPluginPicker open={masterVstPickerOpen} onClose={() => setMasterVstPickerOpen(false)} plugins={masterFxList} onPick={(f) => addVstToChain(f.path)} />
     </div>
   );
 };
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 922c93c..57176b8 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -743,12 +743,15 @@ return{hx:Math.max(0,Math.min((canvasRef.current?canvasRef.current.clientWidth:4
 // url = embed_url từ API fx-gui open (embed:true); onClose khi user đóng;
 // onDead khi bridge chết (ping fail) → parent trả graph + toast.
 const VstGuiEmbed=({url,onClose,onDead})=>{const imgRef=React.useRef(null);const boxRef=React.useRef(null);const deadRef=React.useRef(false);const[dead,setDead]=React.useState(false);const post=payload=>{try{fetch(url+'/input',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(payload)}).catch(()=>{});}catch(e){}};React.useEffect(()=>{deadRef.current=false;setDead(false);const tick=setInterval(()=>{const img=imgRef.current;if(img)img.src=url+'/frame?t='+Date.now();},100);const ping=setInterval(()=>{fetch(url+'/ping').then(r=>{if(!r.ok)throw new Error('bad');}).catch(()=>{if(!deadRef.current){deadRef.current=true;setDead(true);onDead&&onDead();}});},2000);return()=>{clearInterval(tick);clearInterval(ping);};// eslint-disable-next-line react-hooks/exhaustive-deps
-},[url]);const pt=e=>{const box=boxRef.current,img=imgRef.current;if(!box||!img||!img.naturalWidth||!img.naturalHeight)return null;const r=box.getBoundingClientRect();if(r.width===0||r.height===0)return null;return{x:Math.round((e.clientX-r.left)/r.width*img.naturalWidth),y:Math.round((e.clientY-r.top)/r.height*img.naturalHeight)};};const handle=e=>{const p=pt(e);if(!p)return;post({type:e.type==='mousedown'?'mousedown':e.type==='mouseup'?'mouseup':'mousemove',x:p.x,y:p.y,button:e.button,buttons:e.buttons});};const close=()=>{try{fetch(url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}onClose&&onClose();};return/*#__PURE__*/React.createElement("div",{className:"relative w-full h-full flex flex-col"},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between px-3 py-1.5 bg-slate-900/80 border border-slate-800 rounded-t-lg shrink-0"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-violet-300 font-mono"},"VST GUI \u2014 nh\xFAng (frame-capture \xB7 ~10fps)"),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2"},dead&&/*#__PURE__*/React.createElement("span",{className:"text-[9px] text-red-400 font-mono"},"bridge m\u1EA5t k\u1EBFt n\u1ED1i"),/*#__PURE__*/React.createElement("button",{onClick:close,className:"px-2 py-0.5 bg-red-900/60 hover:bg-red-800 text-red-100 text-[10px] font-semibold rounded transition",title:"\u0110\xF3ng GUI v\xE0 tr\u1EA3 v\u1EC1 graph"},"\u2715 \u0110\xF3ng GUI"))),/*#__PURE__*/React.createElement("div",{ref:boxRef,tabIndex:0,className:"flex-1 relative bg-slate-950 border border-slate-800 rounded-b-lg overflow-hidden outline-none",onMouseDown:handle,onMouseUp:handle,onMouseMove:handle,onMouseLeave:()=>post({type:'mouseup',x:-1,y:-1,button:0}),onWheel:e=>{const p=pt(e);if(p)post({type:'wheel',x:p.x,y:p.y,deltaY:e.deltaY});},onKeyDown:e=>{e.preventDefault();post({type:'keydown',keyCode:e.keyCode||e.which});},onKeyUp:e=>{e.preventDefault();post({type:'keyup',keyCode:e.keyCode||e.which});}},/*#__PURE__*/React.createElement("img",{ref:imgRef,alt:"VST GUI",className:"w-full h-full object-contain select-none pointer-events-none",draggable:false})));};const vstRow=(s,idx,toggleV,changeV,uploadV,moveV,removeV,fxl,chainLen,openGui,showCarla=true)=>/*#__PURE__*/React.createElement("div",{key:idx,className:"flex items-center gap-2 bg-slate-900/60 border border-slate-800 rounded-lg px-2 py-1.5 flex-wrap"},/*#__PURE__*/React.createElement("button",{onClick:()=>toggleV(idx),className:`w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0 ${!s.bypass?'bg-teal-500 text-slate-950':'bg-slate-700 text-slate-300'}`,title:s.bypass?'Bypass':'Active'},/*#__PURE__*/React.createElement("i",{"data-lucide":"power",className:"w-2.5 h-2.5"})),/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-300 font-mono w-6 shrink-0"},idx+1),/*#__PURE__*/React.createElement("select",{value:s.path||'',onChange:e=>changeV(idx,e.target.value),className:"flex-1 min-w-[200px] bg-slate-950 border border-slate-700 text-teal-300 rounded px-2 py-1 text-[11px] outline-none focus:border-teal-500"},/*#__PURE__*/React.createElement("option",{value:""},"\u2014 Ch\u1ECDn VST FX \u2014"),(fxl||[]).map(f=>/*#__PURE__*/React.createElement("option",{key:f.path,value:f.path},f.name||f.id))),/*#__PURE__*/React.createElement("span",{className:`text-[9px] font-mono ${s.preset_b64?'text-emerald-400':'text-slate-600'}`},s.preset_b64?'✓ preset':'no preset'),/*#__PURE__*/React.createElement("button",{onClick:()=>uploadV(idx),className:"px-2 py-1 bg-slate-800 hover:bg-slate-700 text-slate-300 text-[10px] font-semibold rounded transition",title:"Upload .vstpreset (Save preset)"},"Preset"),openGui&&/*#__PURE__*/React.createElement("button",{onClick:()=>openGui(s),disabled:!s.path,className:"px-2 py-1 bg-violet-800 hover:bg-violet-700 disabled:opacity-30 text-violet-100 text-[10px] font-semibold rounded transition",title:"M\u1EDF GUI c\u1EE7a VST (ch\u1EC9nh th\xF4ng s\u1ED1 tr\u1EF1c ti\u1EBFp)"},/*#__PURE__*/React.createElement("i",{"data-lucide":"monitor",className:"w-3 h-3"})," GUI"),showCarla&&/*#__PURE__*/React.createElement("button",{onClick:()=>{if(!s.path){window.showToast&&window.showToast('Chọn VST FX trước','warning');return;}window.SonicAPI.openInCarla(s.name||s.path,s.path).then(r=>{if(r&&r.success)window.showToast&&window.showToast('Đã mở Carla với '+(s.name||s.path)+' — chỉnh âm trong Carla rồi Save preset','success');else window.showToast&&window.showToast('Không mở được Carla','error');}).catch(err=>window.showToast&&window.showToast('Lỗi mở Carla: '+(err.message||err),'error'));},className:"px-2 py-1 bg-teal-800 hover:bg-teal-700 text-teal-100 text-[10px] font-semibold rounded transition",title:"M\u1EDF native GUI trong Carla"},"Carla"),/*#__PURE__*/React.createElement("button",{onClick:()=>moveV(idx,-1),disabled:idx===0,className:"w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30",title:"L\xEAn"},/*#__PURE__*/React.createElement("i",{"data-lucide":"chevron-up",className:"w-3 h-3"})),/*#__PURE__*/React.createElement("button",{onClick:()=>moveV(idx,1),disabled:idx===chainLen-1,className:"w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30",title:"Xu\u1ED1ng"},/*#__PURE__*/React.createElement("i",{"data-lucide":"chevron-down",className:"w-3 h-3"})),/*#__PURE__*/React.createElement("button",{onClick:()=>removeV(idx),className:"text-slate-600 hover:text-red-400 text-xs px-0.5",title:"X\xF3a slot"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-3 h-3"})));const FXRackModal=({track,onUpdateTrack,onClose})=>{const[activeType,setActiveType]=React.useState('eq');const[addModuleOpen,setAddModuleOpen]=React.useState(false);const dragChainIndexRef=React.useRef(null);// Wave Observer scope state (unified_fx_rack_panel_update.md §III.3)
+},[url]);const pt=e=>{const box=boxRef.current,img=imgRef.current;if(!box||!img||!img.naturalWidth||!img.naturalHeight)return null;const r=box.getBoundingClientRect();if(r.width===0||r.height===0)return null;return{x:Math.round((e.clientX-r.left)/r.width*img.naturalWidth),y:Math.round((e.clientY-r.top)/r.height*img.naturalHeight)};};const handle=e=>{const p=pt(e);if(!p)return;post({type:e.type==='mousedown'?'mousedown':e.type==='mouseup'?'mouseup':'mousemove',x:p.x,y:p.y,button:e.button,buttons:e.buttons});};const close=()=>{try{fetch(url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}onClose&&onClose();};return/*#__PURE__*/React.createElement("div",{className:"relative w-full h-full flex flex-col"},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between px-3 py-1.5 bg-slate-900/80 border border-slate-800 rounded-t-lg shrink-0"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-violet-300 font-mono"},"VST GUI \u2014 nh\xFAng (frame-capture \xB7 ~10fps)"),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2"},dead&&/*#__PURE__*/React.createElement("span",{className:"text-[9px] text-red-400 font-mono"},"bridge m\u1EA5t k\u1EBFt n\u1ED1i"),/*#__PURE__*/React.createElement("button",{onClick:close,className:"px-2 py-0.5 bg-red-900/60 hover:bg-red-800 text-red-100 text-[10px] font-semibold rounded transition",title:"\u0110\xF3ng GUI v\xE0 tr\u1EA3 v\u1EC1 graph"},"\u2715 \u0110\xF3ng GUI"))),/*#__PURE__*/React.createElement("div",{ref:boxRef,tabIndex:0,className:"flex-1 relative bg-slate-950 border border-slate-800 rounded-b-lg overflow-hidden outline-none",onMouseDown:handle,onMouseUp:handle,onMouseMove:handle,onMouseLeave:()=>post({type:'mouseup',x:-1,y:-1,button:0}),onWheel:e=>{const p=pt(e);if(p)post({type:'wheel',x:p.x,y:p.y,deltaY:e.deltaY});},onKeyDown:e=>{e.preventDefault();post({type:'keydown',keyCode:e.keyCode||e.which});},onKeyUp:e=>{e.preventDefault();post({type:'keyup',keyCode:e.keyCode||e.which});}},/*#__PURE__*/React.createElement("img",{ref:imgRef,alt:"VST GUI",className:"w-full h-full object-contain select-none pointer-events-none",draggable:false})));};const vstRow=(s,idx,toggleV,changeV,uploadV,moveV,removeV,fxl,chainLen,openGui,showCarla=true,activeIdx=-1,onSelect=null)=>/*#__PURE__*/React.createElement("div",{key:idx,onClick:()=>onSelect&&onSelect(s,idx),className:`flex items-center gap-2 bg-slate-900/60 border rounded-lg px-2 py-1.5 flex-wrap cursor-pointer transition-all ${activeIdx===idx?'border-teal-400 bg-slate-800/80':'border-slate-800 hover:border-slate-600'}`},/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();toggleV(idx);},className:`w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0 ${!s.bypass?'bg-teal-500 text-slate-950':'bg-slate-700 text-slate-300'}`,title:s.bypass?'Bypass':'Active'},/*#__PURE__*/React.createElement("i",{"data-lucide":"power",className:"w-2.5 h-2.5"})),/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-300 font-mono w-6 shrink-0"},idx+1),/*#__PURE__*/React.createElement("select",{value:s.path||'',onClick:e=>e.stopPropagation(),onChange:e=>changeV(idx,e.target.value),className:"flex-1 min-w-[200px] bg-slate-950 border border-slate-700 text-teal-300 rounded px-2 py-1 text-[11px] outline-none focus:border-teal-500"},/*#__PURE__*/React.createElement("option",{value:""},"\u2014 Ch\u1ECDn VST FX \u2014"),(fxl||[]).map(f=>/*#__PURE__*/React.createElement("option",{key:f.path,value:f.path},f.name||f.id))),/*#__PURE__*/React.createElement("span",{className:`text-[9px] font-mono ${s.preset_b64?'text-emerald-400':'text-slate-600'}`},s.preset_b64?'✓ preset':'no preset'),/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();uploadV(idx);},className:"px-2 py-1 bg-slate-800 hover:bg-slate-700 text-slate-300 text-[10px] font-semibold rounded transition",title:"Upload .vstpreset (Save preset)"},"Preset"),openGui&&/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();openGui(s,idx);},disabled:!s.path,className:"px-2 py-1 bg-violet-800 hover:bg-violet-700 disabled:opacity-30 text-violet-100 text-[10px] font-semibold rounded transition",title:"M\u1EDF GUI c\u1EE7a VST (ch\u1EC9nh th\xF4ng s\u1ED1 tr\u1EF1c ti\u1EBFp)"},/*#__PURE__*/React.createElement("i",{"data-lucide":"monitor",className:"w-3 h-3"})," GUI"),showCarla&&/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();if(!s.path){window.showToast&&window.showToast('Chọn VST FX trước','warning');return;}window.SonicAPI.openInCarla(s.name||s.path,s.path).then(r=>{if(r&&r.success)window.showToast&&window.showToast('Đã mở Carla với '+(s.name||s.path)+' — chỉnh âm trong Carla rồi Save preset','success');else window.showToast&&window.showToast('Không mở được Carla','error');}).catch(err=>window.showToast&&window.showToast('Lỗi mở Carla: '+(err.message||err),'error'));},className:"px-2 py-1 bg-teal-800 hover:bg-teal-700 text-teal-100 text-[10px] font-semibold rounded transition",title:"M\u1EDF native GUI trong Carla"},"Carla"),/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();moveV(idx,-1);},disabled:idx===0,className:"w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30",title:"L\xEAn"},/*#__PURE__*/React.createElement("i",{"data-lucide":"chevron-up",className:"w-3 h-3"})),/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();moveV(idx,1);},disabled:idx===chainLen-1,className:"w-6 h-6 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs disabled:opacity-30",title:"Xu\u1ED1ng"},/*#__PURE__*/React.createElement("i",{"data-lucide":"chevron-down",className:"w-3 h-3"})),/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();removeV(idx);},className:"text-slate-600 hover:text-red-400 text-xs px-0.5",title:"X\xF3a slot"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-3 h-3"})));// ── VST FX Plugin Picker (spec vst_fx_panel_integration.md §II) ──────────
+// Modal chọn VST FX theo category (heuristic từ backend list_fx.category).
+// Dùng chung FXRackModal + MasteringModal: [+] → picker → chèn VST card.
+const VST_FX_CATEGORIES=[{id:'all',label:'Tất cả'},{id:'equalizer',label:'Equalizers / Dynamic EQ'},{id:'reverb_delay',label:'Reverbs & Delays'},{id:'comp_limiter',label:'Compressors & Limiters'},{id:'distortion',label:'Distortion / Saturation'},{id:'utility',label:'Utility'}];const VstPluginPicker=({open,onClose,plugins,onPick})=>{const[cat,setCat]=React.useState('all');React.useEffect(()=>{if(open)setCat('all');},[open]);if(!open)return null;const list=(plugins||[]).filter(p=>cat==='all'||(p.category||'utility')===cat);return/*#__PURE__*/React.createElement("div",{className:"fixed inset-0 z-[125] bg-black/80 backdrop-blur-sm flex items-center justify-center p-4",onClick:onClose},/*#__PURE__*/React.createElement("div",{className:"w-full max-w-2xl bg-slate-900 border border-slate-700 rounded-2xl p-5 space-y-4 shadow-2xl max-h-[80vh] flex flex-col",onClick:e=>e.stopPropagation()},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between border-b border-slate-800 pb-3"},/*#__PURE__*/React.createElement("h3",{className:"text-xs font-bold text-white uppercase tracking-wider font-mono"},"CH\u1ECCN VST FX \u2014 PLUGIN PICKER"),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"text-slate-400 hover:text-white"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("div",{className:"flex flex-wrap gap-1.5 shrink-0"},VST_FX_CATEGORIES.map(c=>/*#__PURE__*/React.createElement("button",{key:c.id,onClick:()=>setCat(c.id),className:`px-2.5 py-1 rounded text-[10px] font-semibold transition ${cat===c.id?'bg-teal-700 text-white':'bg-slate-800 hover:bg-slate-700 text-slate-300'}`},c.label))),/*#__PURE__*/React.createElement("div",{className:"flex-1 overflow-y-auto oz-scrollbar grid grid-cols-2 gap-2"},list.length===0&&/*#__PURE__*/React.createElement("div",{className:"col-span-2 text-[11px] text-slate-500 font-mono py-10 text-center"},"Kh\xF4ng c\xF3 VST FX trong m\u1EE5c n\xE0y."),list.map(f=>/*#__PURE__*/React.createElement("button",{key:f.path,onClick:()=>{onPick(f);onClose();},className:"p-2 bg-slate-950 hover:bg-slate-800 border border-slate-800 rounded-lg text-left space-y-0.5 transition-colors"},/*#__PURE__*/React.createElement("div",{className:"text-[11px] font-bold text-teal-300 flex items-center gap-1.5"},/*#__PURE__*/React.createElement("i",{"data-lucide":"plug",className:"w-3 h-3"})," ",f.name||f.id),/*#__PURE__*/React.createElement("div",{className:"text-[9px] text-slate-500 font-mono truncate"},f.path))))));};const FXRackModal=({track,onUpdateTrack,onClose})=>{const[activeType,setActiveType]=React.useState('eq');const[addModuleOpen,setAddModuleOpen]=React.useState(false);const dragChainIndexRef=React.useRef(null);// Wave Observer scope state (unified_fx_rack_panel_update.md §III.3)
 const[scopeChannel,setScopeChannel]=React.useState('stereo');const[scopeMode,setScopeMode]=React.useState('waveform');const[scopeDuration,setScopeDuration]=React.useState(2.0);const[scopeZoom,setScopeZoom]=React.useState(0);const[scopePaused,setScopePaused]=React.useState(false);const scopeCanvasRef=React.useRef(null);const scopeMeterLRef=React.useRef(null);const scopeMeterRRef=React.useRef(null);const eqCurveRef=React.useRef(null);const scopeStateRef=React.useRef({L:null,R:null,head:0,len:0,tmpL:null,tmpR:null,freq:null});// VST FX (native_bridge --render-fx) — list VST3 effect plugins + preview
-const[fxList,setFxList]=React.useState([]);React.useEffect(()=>{if(window.SonicAPI&&window.SonicAPI.listFx){window.SonicAPI.listFx().then(d=>setFxList(d&&d.plugins||[])).catch(()=>setFxList([]));}},[track&&track.id]);const previewAudioRef=React.useRef(null);const[vstBypass,setVstBypass]=React.useState(!!(track&&track.vstFxBypass));const[addVstSel,setAddVstSel]=React.useState('');if(!track)return null;const chain=track.fxChain||[];// ── VST FX chain (native_bridge --render-fx, áp dụng khi Export/Offline render) ──
+const[fxList,setFxList]=React.useState([]);React.useEffect(()=>{if(window.SonicAPI&&window.SonicAPI.listFx){window.SonicAPI.listFx().then(d=>setFxList(d&&d.plugins||[])).catch(()=>setFxList([]));}},[track&&track.id]);const previewAudioRef=React.useRef(null);const[vstBypass,setVstBypass]=React.useState(!!(track&&track.vstFxBypass));const[activeVstIdx,setActiveVstIdx]=React.useState(-1);const[vstPickerOpen,setVstPickerOpen]=React.useState(false);if(!track)return null;const chain=track.fxChain||[];// ── VST FX chain (native_bridge --render-fx, áp dụng khi Export/Offline render) ──
 const vstChain=track.vstFxChain||[];const setVstChain=next=>{if(onUpdateTrack)onUpdateTrack(track.id,{vstFxChain:next,vstFxBypass:vstBypass});};// Embedded VST GUI state (PLAN_MASTERBUS_VST_GUI_EMBED.md Phase 3)
 const[fxGuiOpen,setFxGuiOpen]=React.useState(null);// { path, url } | null
-const closeFxGui=()=>{if(fxGuiOpen){try{fetch(fxGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}setFxGuiOpen(null);}};React.useEffect(()=>()=>{if(fxGuiOpen){try{fetch(fxGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}}},[]);const toggleVst=idx=>setVstChain(vstChain.map((s,i)=>i===idx?{...s,bypass:!s.bypass}:s));const removeVst=idx=>setVstChain(vstChain.filter((_,i)=>i!==idx));const moveVst=(idx,dir)=>{const j=idx+dir;if(j<0||j>=vstChain.length)return;const next=[...vstChain];const mv=next.splice(idx,1)[0];next.splice(j,0,mv);setVstChain(next);};const openVstGui=s=>{if(!s||!s.path){window.showToast&&window.showToast('Chọn VST FX trước','warning');return;}if(fxGuiOpen)closeFxGui();if(!window.SonicAPI||!window.SonicAPI.openFxGui){window.showToast&&window.showToast('Máy này không hỗ trợ mở GUI VST','warning');return;}window.SonicAPI.openFxGui({path:s.path,name:s.name||s.path,embed:true}).then(r=>{if(r&&r.success&&r.embed_url)setFxGuiOpen({path:s.path,url:r.embed_url});else if(r&&r.already_running)window.showToast&&window.showToast('GUI của plugin này đang mở sẵn','info');else window.showToast&&window.showToast('Không mở được GUI embed','error');}).catch(err=>window.showToast&&window.showToast('Lỗi mở GUI: '+(err.message||err),'error'));};const addVst=path=>{const fx=(fxList||[]).find(f=>f.path===path);if(!fx)return;setVstChain([...vstChain,{type:'vst3',path:fx.path,name:fx.name||fx.id,preset_b64:'',bypass:false}]);openVstGui({path:fx.path,name:fx.name||fx.id});};const changeVstPlugin=(idx,path)=>{const fx=(fxList||[]).find(f=>f.path===path);setVstChain(vstChain.map((s,i)=>i===idx?{...s,path,name:fx?fx.name||fx.id:s.name,preset_b64:''}:s));};const uploadVstPreset=idx=>{const inp=document.createElement('input');inp.type='file';inp.accept='.vstpreset,.fxp,.fxb,.dspreset';inp.onchange=()=>{const f=inp.files&&inp.files[0];if(!f)return;const reader=new FileReader();reader.onload=()=>{const b64=String(reader.result||'').split(',')[1]||'';setVstChain(vstChain.map((s,i)=>i===idx?{...s,preset_b64:b64}:s));window.showToast&&window.showToast('Đã gắn preset .vstpreset vào slot '+(idx+1),'success');};reader.readAsDataURL(f);};inp.click();};const previewFx=async()=>{try{if(previewAudioRef.current){previewAudioRef.current.pause();previewAudioRef.current=null;}if(!window.__renderProjectPreview){window.showToast&&window.showToast('Không có hàm render preview','warning');return;}window.showToast&&window.showToast('Đang render offline (bridge)...','info');const res=await window.__renderProjectPreview();const au=new Audio((window.API_BASE_URL||'')+res.url);previewAudioRef.current=au;au.onended=()=>{previewAudioRef.current=null;};au.play().then(()=>window.showToast&&window.showToast('Preview offline — âm thật = âm export (VST FX)','success')).catch(()=>{});}catch(e){/* toast ở __renderProjectPreview */}};const setChain=next=>{if(onUpdateTrack)onUpdateTrack(track.id,{fxChain:next});if(window.__rebuildTrackFxGraph)window.__rebuildTrackFxGraph(track.id);};const paramsOf=m=>({...(TRACK_FX_DEFAULTS[m.type]||{}),...(m.params||{})});const setParams=(idx,patch)=>{const next=chain.map((m,i)=>i===idx?{...m,params:{...paramsOf(m),...patch}}:m);setChain(next);};const toggleMod=idx=>{const next=chain.map((m,i)=>i===idx?{...m,active:!(m.active!==false)}:m);setChain(next);};const removeMod=idx=>setChain(chain.filter((_,i)=>i!==idx));const addMod=type=>{const def=TRACK_FX_DEFAULTS[type]||{};// Deep-clone default params so each chain entry owns its data (bands array
+const closeFxGui=()=>{if(fxGuiOpen){try{fetch(fxGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}setFxGuiOpen(null);}};React.useEffect(()=>()=>{if(fxGuiOpen){try{fetch(fxGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}}},[]);const toggleVst=idx=>setVstChain(vstChain.map((s,i)=>i===idx?{...s,bypass:!s.bypass}:s));const removeVst=idx=>{const rem=vstChain[idx];if(rem&&fxGuiOpen&&fxGuiOpen.path===rem.path)closeFxGui();if(idx===activeVstIdx)setActiveVstIdx(-1);setVstChain(vstChain.filter((_,i)=>i!==idx));};const moveVst=(idx,dir)=>{const j=idx+dir;if(j<0||j>=vstChain.length)return;const next=[...vstChain];const mv=next.splice(idx,1)[0];next.splice(j,0,mv);setVstChain(next);};const openVstGui=(s,idx)=>{if(!s||!s.path){window.showToast&&window.showToast('Chọn VST FX trước','warning');return;}if(fxGuiOpen)closeFxGui();if(idx!==undefined)setActiveVstIdx(idx);if(!window.SonicAPI||!window.SonicAPI.openFxGui){window.showToast&&window.showToast('Máy này không hỗ trợ mở GUI VST','warning');return;}window.SonicAPI.openFxGui({path:s.path,name:s.name||s.path,embed:true}).then(r=>{if(r&&r.embed_url)setFxGuiOpen({path:s.path,url:r.embed_url});else if(r&&r.already_running)window.showToast&&window.showToast('GUI của plugin này đang mở sẵn (cửa sổ ngoài)','info');else window.showToast&&window.showToast('Không mở được GUI embed','error');}).catch(err=>window.showToast&&window.showToast('Lỗi mở GUI: '+(err.message||err),'error'));};const addVst=path=>{const fx=(fxList||[]).find(f=>f.path===path);if(!fx)return;const next=[...vstChain,{type:'vst3',path:fx.path,name:fx.name||fx.id,preset_b64:'',bypass:false}];setVstChain(next);setActiveVstIdx(next.length-1);};const changeVstPlugin=(idx,path)=>{const fx=(fxList||[]).find(f=>f.path===path);setVstChain(vstChain.map((s,i)=>i===idx?{...s,path,name:fx?fx.name||fx.id:s.name,preset_b64:''}:s));};const uploadVstPreset=idx=>{const inp=document.createElement('input');inp.type='file';inp.accept='.vstpreset,.fxp,.fxb,.dspreset';inp.onchange=()=>{const f=inp.files&&inp.files[0];if(!f)return;const reader=new FileReader();reader.onload=()=>{const b64=String(reader.result||'').split(',')[1]||'';setVstChain(vstChain.map((s,i)=>i===idx?{...s,preset_b64:b64}:s));window.showToast&&window.showToast('Đã gắn preset .vstpreset vào slot '+(idx+1),'success');};reader.readAsDataURL(f);};inp.click();};const previewFx=async()=>{try{if(previewAudioRef.current){previewAudioRef.current.pause();previewAudioRef.current=null;}if(!window.__renderProjectPreview){window.showToast&&window.showToast('Không có hàm render preview','warning');return;}window.showToast&&window.showToast('Đang render offline (bridge)...','info');const res=await window.__renderProjectPreview();const au=new Audio((window.API_BASE_URL||'')+res.url);previewAudioRef.current=au;au.onended=()=>{previewAudioRef.current=null;};au.play().then(()=>window.showToast&&window.showToast('Preview offline — âm thật = âm export (VST FX)','success')).catch(()=>{});}catch(e){/* toast ở __renderProjectPreview */}};const setChain=next=>{if(onUpdateTrack)onUpdateTrack(track.id,{fxChain:next});if(window.__rebuildTrackFxGraph)window.__rebuildTrackFxGraph(track.id);};const paramsOf=m=>({...(TRACK_FX_DEFAULTS[m.type]||{}),...(m.params||{})});const setParams=(idx,patch)=>{const next=chain.map((m,i)=>i===idx?{...m,params:{...paramsOf(m),...patch}}:m);setChain(next);};const toggleMod=idx=>{const next=chain.map((m,i)=>i===idx?{...m,active:!(m.active!==false)}:m);setChain(next);};const removeMod=idx=>setChain(chain.filter((_,i)=>i!==idx));const addMod=type=>{const def=TRACK_FX_DEFAULTS[type]||{};// Deep-clone default params so each chain entry owns its data (bands array
 // especially — shared references would corrupt other modules' state).
 const params=Array.isArray(def.bands)?{...def,bands:JSON.parse(JSON.stringify(def.bands))}:{...def};setChain([...chain,{type,active:true,params}]);setActiveType(type);setAddModuleOpen(false);};const applyPreset=key=>{const preset=TRACK_EQ_PRESETS[key];if(!preset)return;const idx=chain.findIndex(m=>m.type==='eq'&&m.active!==false);if(idx>=0)setParams(idx,{g1:preset.g[0],g2:preset.g[1],g3:preset.g[2],g4:preset.g[3]});};const activeMod=chain.find(m=>m.type===activeType)||chain[chain.length-1]||null;const activeIdx=chain.findIndex(m=>m===activeMod);const ap=activeMod?paramsOf(activeMod):{};const slider=(label,val,min,max,step,color,onChange,fmt)=>/*#__PURE__*/React.createElement("div",{className:"flex flex-col gap-1"},/*#__PURE__*/React.createElement("div",{className:"flex justify-between text-[11px] font-mono"},/*#__PURE__*/React.createElement("span",{style:{color,fontWeight:700}},label),/*#__PURE__*/React.createElement("span",{className:"text-slate-300"},fmt?fmt(val):val)),/*#__PURE__*/React.createElement("input",{type:"range",min:min,max:max,step:step||0.1,value:val,onChange:e=>onChange(parseFloat(e.target.value)),className:"w-full h-1 cursor-pointer",style:{accentColor:color}}));// ── Wave Observer real-time scope render loop ──
 React.useEffect(()=>{const canvas=scopeCanvasRef.current;if(!canvas||!track)return;const st=scopeStateRef.current;let raf=null;const draw=()=>{raf=requestAnimationFrame(draw);const w=canvas.width,h=canvas.height;const ctx=canvas.getContext('2d');ctx.clearRect(0,0,w,h);// Grid
@@ -761,14 +764,14 @@ ctx.strokeStyle='rgba(51, 65, 85, 0.35)';for(let i=1;i<5;i++){const y=i/5*h;ctx.
 const bands=[{type:'lowshelf',f0:100,gain:ap.g1||0,q:0.7},{type:'peaking',f0:800,gain:ap.g2||0,q:0.7},{type:'peaking',f0:3200,gain:ap.g3||0,q:1.2},{type:'highshelf',f0:10000,gain:ap.g4||0,q:0.7}];const pts=[];const N=120;for(let i=0;i<=N;i++){const f=20*Math.pow(20000/20,i/N);let db=0;bands.forEach(b=>{const lf=Math.log(f/b.f0);if(b.type==='peaking'){db+=b.gain/(1+Math.pow(lf*b.q,2));}else if(b.type==='highshelf'){db+=b.gain/2*(1+2/Math.PI*Math.atan(lf/(1/b.q)));}else{db+=b.gain/2*(1-2/Math.PI*Math.atan(lf/(1/b.q)));}});const x=i/N*w;const y=midY-db/12*(h/2);pts.push([x,y]);}// fill
 ctx.beginPath();pts.forEach(([x,y],i)=>i===0?ctx.moveTo(x,y):ctx.lineTo(x,y));ctx.lineTo(w,h);ctx.lineTo(0,h);ctx.closePath();ctx.fillStyle='rgba(34, 211, 238, 0.10)';ctx.fill();// curve
 ctx.beginPath();pts.forEach(([x,y],i)=>i===0?ctx.moveTo(x,y):ctx.lineTo(x,y));ctx.strokeStyle='#22d3ee';ctx.lineWidth=2;ctx.stroke();// dB labels
-ctx.fillStyle='#475569';ctx.font='9px monospace';ctx.fillText('+12 dB',4,midY-h/2+10);ctx.fillText('0 dB',4,midY+3);ctx.fillText('-12 dB',4,midY+h/2-4);ctx.fillText('20Hz',4,h-2);ctx.fillText('20kHz',w-38,h-2);},[ap.g1,ap.g2,ap.g3,ap.g4,activeMod]);return/*#__PURE__*/React.createElement("div",{className:"fixed inset-0 z-[115] bg-black/80 backdrop-blur-sm flex items-center justify-center p-4",onClick:onClose},/*#__PURE__*/React.createElement("div",{className:"w-full max-w-4xl bg-slate-900 border border-slate-700 rounded-2xl p-5 space-y-4 shadow-2xl flex flex-col max-h-[90vh] text-slate-200",onClick:e=>e.stopPropagation()},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between border-b border-slate-800 pb-3"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2"},/*#__PURE__*/React.createElement("div",{className:"w-3 h-3 rounded-full bg-cyan-400 animate-pulse"}),/*#__PURE__*/React.createElement("h3",{className:"text-xs font-bold text-white uppercase tracking-wider font-mono"},track.name," \u2014 FX RACK PANEL")),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"text-slate-400 hover:text-white text-base"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("div",{className:"h-16 bg-slate-950 border border-slate-800 rounded-xl px-3 flex items-center gap-2 overflow-x-auto shrink-0 select-none"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-500 uppercase tracking-widest mr-1 font-mono shrink-0"},"CHAIN:"),chain.length===0&&/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-slate-500 font-mono"},"Ch\u01B0a c\xF3 FX \u2014 b\u1EA5m [+] \u0111\u1EC3 th\xEAm (signal \u0111i th\u1EB3ng: Source \u2192 Fader)"),chain.map((m,idx)=>{const meta=TRACK_FX_META[m.type]||{name:m.type,icon:'circle',color:'#94a3b8',sub:''};const on=m.active!==false;return/*#__PURE__*/React.createElement("div",{key:idx,draggable:true,onDragStart:e=>{dragChainIndexRef.current=idx;e.dataTransfer.effectAllowed='move';},onDragOver:e=>{e.preventDefault();e.dataTransfer.dropEffect='move';},onDrop:e=>{e.preventDefault();const from=dragChainIndexRef.current;if(from!==null&&from!==idx){const next=[...chain];const mv=next.splice(from,1)[0];next.splice(idx,0,mv);setChain(next);}dragChainIndexRef.current=null;},onClick:()=>setActiveType(m.type),className:`w-36 h-12 rounded-lg p-2 flex items-center justify-between cursor-pointer transition-all shrink-0 ${activeType===m.type?'border-2 border-cyan-400 bg-slate-800':'bg-slate-900 border border-slate-800 hover:border-slate-600'}`},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-2 min-w-0"},/*#__PURE__*/React.createElement("button",{onClick:e=>{e.stopPropagation();toggleMod(idx);},className:"w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold shrink-0",style:{backgroundColor:on?'#38bdf8':'#334155',color:on?'#0f172a':'#94a3b8'}},/*#__PURE__*/React.createElement("i",{"data-lucide":"power",className:"w-2.5 h-2.5"})),/*#__PURE__*/React.createElement("div",{className:"min-w-0"},/*#__PURE__*/React.createElement("div",{className:"text-[11px] font-bold text-slate-200 truncate"},meta.name),/*#__PURE__*/React.createElement("div",{className:"text-[9px] font-mono truncate",style:{color:meta.color}},idx+1,". 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 // ──────────────────────────────────────────────
 const MasteringModal=({isOpen,onClose,masteringSettings,setMasteringSettings})=>{const ozState=masteringSettings;const setOzState=setMasteringSettings;const[isPlaying,setIsPlaying]=React.useState(false);const masterConnected=ozState.masterConnected;const setMasterConnected=val=>{setOzState(prev=>({...prev,masterConnected:typeof val==='function'?val(prev.masterConnected):val}));};// ── VST FX masterbus (native_bridge --render-fx, áp dụng khi Export/Offline render) ──
 const masterVstChain=ozState.vstFxChain||[];// Embedded VST GUI state (PLAN_MASTERBUS_VST_GUI_EMBED.md Phase 2)
 const[masterGuiOpen,setMasterGuiOpen]=React.useState(null);// { path, url } | null
-const closeMasterGui=()=>{if(masterGuiOpen){try{fetch(masterGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}setMasterGuiOpen(null);}};React.useEffect(()=>()=>{if(masterGuiOpen){try{fetch(masterGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}}},[]);const setMasterVstChain=next=>setOzState(prev=>({...prev,vstFxChain:next}));const toggleMasterVst=idx=>setMasterVstChain(masterVstChain.map((s,i)=>i===idx?{...s,bypass:!s.bypass}:s));const removeMasterVst=idx=>setMasterVstChain(masterVstChain.filter((_,i)=>i!==idx));const moveMasterVst=(idx,dir)=>{const j=idx+dir;if(j<0||j>=masterVstChain.length)return;const next=[...masterVstChain];const mv=next.splice(idx,1)[0];next.splice(j,0,mv);setMasterVstChain(next);};const openMasterVstGui=s=>{if(!s||!s.path){window.showToast&&window.showToast('Chọn VST FX trước','warning');return;}if(masterGuiOpen)closeMasterGui();if(!window.SonicAPI||!window.SonicAPI.openFxGui){window.showToast&&window.showToast('Máy này không hỗ trợ mở GUI VST','warning');return;}window.SonicAPI.openFxGui({path:s.path,name:s.name||s.path,embed:true}).then(r=>{if(r&&r.success&&r.embed_url)setMasterGuiOpen({path:s.path,url:r.embed_url});else if(r&&r.already_running)window.showToast&&window.showToast('GUI của plugin này đang mở sẵn','info');else window.showToast&&window.showToast('Không mở được GUI embed','error');}).catch(err=>window.showToast&&window.showToast('Lỗi mở GUI: '+(err.message||err),'error'));};const addMasterVst=path=>{const fx=(masterFxList||[]).find(f=>f.path===path);if(!fx)return;setMasterVstChain([...masterVstChain,{type:'vst3',path:fx.path,name:fx.name||fx.id,preset_b64:'',bypass:false}]);openMasterVstGui({path:fx.path,name:fx.name||fx.id});};const changeMasterVstPlugin=(idx,path)=>{const fx=(masterFxList||[]).find(f=>f.path===path);setMasterVstChain(masterVstChain.map((s,i)=>i===idx?{...s,path,name:fx?fx.name||fx.id:s.name,preset_b64:''}:s));};const uploadMasterVstPreset=idx=>{const inp=document.createElement('input');inp.type='file';inp.accept='.vstpreset,.fxp,.fxb,.dspreset';inp.onchange=()=>{const f=inp.files&&inp.files[0];if(!f)return;const reader=new FileReader();reader.onload=()=>{const b64=String(reader.result||'').split(',')[1]||'';setMasterVstChain(masterVstChain.map((s,i)=>i===idx?{...s,preset_b64:b64}:s));window.showToast&&window.showToast('Đã gắn preset .vstpreset vào slot '+(idx+1),'success');};reader.readAsDataURL(f);};inp.click();};const previewMasterFx=async()=>{try{if(previewAudioRef.current){previewAudioRef.current.pause();previewAudioRef.current=null;}if(!window.__renderProjectPreview){window.showToast&&window.showToast('Không có hàm render preview','warning');return;}window.showToast&&window.showToast('Đang render offline (bridge)...','info');const res=await window.__renderProjectPreview();const au=new Audio((window.API_BASE_URL||'')+res.url);previewAudioRef.current=au;au.onended=()=>{previewAudioRef.current=null;};au.play().then(()=>window.showToast&&window.showToast('Preview offline — âm thật = âm export (VST FX)','success')).catch(()=>{});}catch(e){/* toast ở __renderProjectPreview */}};const audioRef=React.useRef({source:null});const eqCanvasRef=React.useRef(null);const imagerCanvasRef=React.useRef(null);const inMeterCanvasRef=React.useRef(null);const outMeterCanvasRef=React.useRef(null);const animFrameRef=React.useRef(null);const lufsAccRef=React.useRef([]);const knobsInitializedRef=React.useRef(false);// VST FX masterbus (native_bridge --render-fx) — list VST3 effect plugins + preview
-const[masterFxList,setMasterFxList]=React.useState([]);React.useEffect(()=>{if(window.SonicAPI&&window.SonicAPI.listFx){window.SonicAPI.listFx().then(d=>setMasterFxList(d&&d.plugins||[])).catch(()=>setMasterFxList([]));}},[]);const previewAudioRef=React.useRef(null);const[addMasterVstSel,setAddMasterVstSel]=React.useState('');// Wave Observer Refs & States
+const[activeMasterVstPath,setActiveMasterVstPath]=React.useState(null);const closeMasterGui=()=>{if(masterGuiOpen){try{fetch(masterGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}setMasterGuiOpen(null);}setActiveMasterVstPath(null);};React.useEffect(()=>()=>{if(masterGuiOpen){try{fetch(masterGuiOpen.url+'/close',{method:'POST'}).catch(()=>{});}catch(e){}}},[]);const setMasterVstChain=next=>setOzState(prev=>({...prev,vstFxChain:next}));const toggleMasterVst=idx=>setMasterVstChain(masterVstChain.map((s,i)=>i===idx?{...s,bypass:!s.bypass}:s));const removeMasterVst=idx=>setMasterVstChain(masterVstChain.filter((_,i)=>i!==idx));const moveMasterVst=(idx,dir)=>{const j=idx+dir;if(j<0||j>=masterVstChain.length)return;const next=[...masterVstChain];const mv=next.splice(idx,1)[0];next.splice(j,0,mv);setMasterVstChain(next);};const openMasterVstGui=s=>{if(!s||!s.path){window.showToast&&window.showToast('Chọn VST FX trước','warning');return;}if(masterGuiOpen)closeMasterGui();if(s.path)setActiveMasterVstPath(s.path);if(!window.SonicAPI||!window.SonicAPI.openFxGui){window.showToast&&window.showToast('Máy này không hỗ trợ mở GUI VST','warning');return;}window.SonicAPI.openFxGui({path:s.path,name:s.name||s.path,embed:true}).then(r=>{if(r&&r.embed_url)setMasterGuiOpen({path:s.path,url:r.embed_url});else if(r&&r.already_running)window.showToast&&window.showToast('GUI của plugin này đang mở sẵn (cửa sổ ngoài)','info');else window.showToast&&window.showToast('Không mở được GUI embed','error');}).catch(err=>window.showToast&&window.showToast('Lỗi mở GUI: '+(err.message||err),'error'));};const addMasterVst=path=>{const fx=(masterFxList||[]).find(f=>f.path===path);if(!fx)return;setMasterVstChain([...masterVstChain,{type:'vst3',path:fx.path,name:fx.name||fx.id,preset_b64:'',bypass:false}]);openMasterVstGui({path:fx.path,name:fx.name||fx.id});};const changeMasterVstPlugin=(idx,path)=>{const fx=(masterFxList||[]).find(f=>f.path===path);setMasterVstChain(masterVstChain.map((s,i)=>i===idx?{...s,path,name:fx?fx.name||fx.id:s.name,preset_b64:''}:s));};const uploadMasterVstPreset=idx=>{const inp=document.createElement('input');inp.type='file';inp.accept='.vstpreset,.fxp,.fxb,.dspreset';inp.onchange=()=>{const f=inp.files&&inp.files[0];if(!f)return;const reader=new FileReader();reader.onload=()=>{const b64=String(reader.result||'').split(',')[1]||'';setMasterVstChain(masterVstChain.map((s,i)=>i===idx?{...s,preset_b64:b64}:s));window.showToast&&window.showToast('Đã gắn preset .vstpreset vào slot '+(idx+1),'success');};reader.readAsDataURL(f);};inp.click();};const previewMasterFx=async()=>{try{if(previewAudioRef.current){previewAudioRef.current.pause();previewAudioRef.current=null;}if(!window.__renderProjectPreview){window.showToast&&window.showToast('Không có hàm render preview','warning');return;}window.showToast&&window.showToast('Đang render offline (bridge)...','info');const res=await window.__renderProjectPreview();const au=new Audio((window.API_BASE_URL||'')+res.url);previewAudioRef.current=au;au.onended=()=>{previewAudioRef.current=null;};au.play().then(()=>window.showToast&&window.showToast('Preview offline — âm thật = âm export (VST FX)','success')).catch(()=>{});}catch(e){/* toast ở __renderProjectPreview */}};const audioRef=React.useRef({source:null});const eqCanvasRef=React.useRef(null);const imagerCanvasRef=React.useRef(null);const inMeterCanvasRef=React.useRef(null);const outMeterCanvasRef=React.useRef(null);const animFrameRef=React.useRef(null);const lufsAccRef=React.useRef([]);const knobsInitializedRef=React.useRef(false);// VST FX masterbus (native_bridge --render-fx) — list VST3 effect plugins + preview
+const[masterFxList,setMasterFxList]=React.useState([]);React.useEffect(()=>{if(window.SonicAPI&&window.SonicAPI.listFx){window.SonicAPI.listFx().then(d=>setMasterFxList(d&&d.plugins||[])).catch(()=>setMasterFxList([]));}},[]);const previewAudioRef=React.useRef(null);const[addMasterVstSel,setAddMasterVstSel]=React.useState('');const[masterVstPickerOpen,setMasterVstPickerOpen]=React.useState(false);// Wave Observer Refs & States
 const woCanvasRef=React.useRef(null);const woLeftHistoryRef=React.useRef(new Float32Array(400).fill(0));const woRightHistoryRef=React.useRef(new Float32Array(400).fill(0));const woLeftMeterRef=React.useRef(null);const woRightMeterRef=React.useRef(null);const[woPaused,setWoPaused]=React.useState(false);const[woChannel,setWoChannel]=React.useState('stereo');const[woMode,setWoMode]=React.useState('waveform');const[woDuration,setWoDuration]=React.useState(2.0);const[woZoom,setWoZoom]=React.useState(0.0);const woPausedRef=React.useRef(woPaused);woPausedRef.current=woPaused;const woChannelRef=React.useRef(woChannel);woChannelRef.current=woChannel;const woModeRef=React.useRef(woMode);woModeRef.current=woMode;const woDurationRef=React.useRef(woDuration);woDurationRef.current=woDuration;const woZoomRef=React.useRef(woZoom);woZoomRef.current=woZoom;const ozStateRef=React.useRef(ozState);ozStateRef.current=ozState;function startAudioDemo(){getAudioContext();const ctx=audioCtx;if(ctx.state==='suspended')ctx.resume();stopAudioDemo();const sampleRate=ctx.sampleRate;const bufferSize=sampleRate*4;const buffer=ctx.createBuffer(2,bufferSize,sampleRate);const left=buffer.getChannelData(0);const right=buffer.getChannelData(1);for(let i=0;i<bufferSize;i++){const t=i/sampleRate;const kickEnv=Math.max(0,1-t%0.5*8);const kick=Math.sin(2*Math.PI*(55*Math.exp(-(t%0.5)*18)))*kickEnv;const snareEnv=Math.max(0,1-(t+0.25)%0.5*6);const snare=(Math.random()*2-1)*snareEnv*0.3;const synth=(Math.sin(2*Math.PI*261.63*t)+Math.sin(2*Math.PI*311.13*t)+Math.sin(2*Math.PI*392.0*t))*0.12;left[i]=kick*0.6+snare+synth;right[i]=kick*0.6+snare*0.9+synth*0.95;}const source=ctx.createBufferSource();source.buffer=buffer;source.loop=true;source.connect(masterBus.inputAnalyser);source.start();audioRef.current.source=source;setIsPlaying(true);}function stopAudioDemo(){const src=audioRef.current.source;if(src){try{src.stop();}catch(e){}try{src.disconnect();}catch(e){}audioRef.current.source=null;}setIsPlaying(false);}React.useEffect(()=>{if(!isOpen)return;getAudioContext();function resizeAll(){const resizeCanvas=ref=>{const el=ref.current;if(el){el.width=el.clientWidth;el.height=el.clientHeight;}};resizeCanvas(eqCanvasRef);resizeCanvas(imagerCanvasRef);resizeCanvas(inMeterCanvasRef);resizeCanvas(outMeterCanvasRef);resizeCanvas(woCanvasRef);}resizeAll();window.addEventListener('resize',resizeAll);const fftData=new Uint8Array(1024);function getPeakLevel(analyser){if(!analyser)return 0;const bufferLength=analyser.fftSize;const dataArray=new Float32Array(bufferLength);analyser.getFloatTimeDomainData(dataArray);let maxVal=0;for(let i=0;i<bufferLength;i++){const val=Math.abs(dataArray[i]);if(val>maxVal){maxVal=val;}}return maxVal;}function renderFrame(){animFrameRef.current=requestAnimationFrame(renderFrame);const s=ozStateRef.current;// EQ Spectrum
 const eqCanvas=eqCanvasRef.current;if(eqCanvas){const w=eqCanvas.width,h=eqCanvas.height;const eqCtx=eqCanvas.getContext('2d');eqCtx.clearRect(0,0,w,h);eqCtx.strokeStyle='rgba(51, 65, 85, 0.3)';eqCtx.lineWidth=1;eqCtx.font='9px JetBrains Mono';eqCtx.fillStyle='#475569';const freqs=[20,50,100,200,500,1000,2000,5000,10000,20000];freqs.forEach(f=>{const x=Math.log10(f/20)/Math.log10(20000/20)*w;eqCtx.beginPath();eqCtx.moveTo(x,0);eqCtx.lineTo(x,h);eqCtx.stroke();if(f>=1000)eqCtx.fillText(`${f/1000}k`,x+3,h-6);else eqCtx.fillText(`${f}`,x+3,h-6);});if(masterBus&&masterBus.outputAnalyser){masterBus.outputAnalyser.getByteFrequencyData(fftData);eqCtx.fillStyle='rgba(56, 189, 248, 0.15)';const barWidth=w/128;for(let i=0;i<128;i++){const val=fftData[i*4]/255;eqCtx.fillRect(i*barWidth,h-val*h,barWidth-1,val*h);}}eqCtx.strokeStyle='#38bdf8';eqCtx.lineWidth=2.5;eqCtx.beginPath();for(let x=0;x<w;x++){const freq=20*Math.pow(20000/20,x/w);let gainDb=0;if(s.eqActive){gainDb+=s.eqLowGain/(1+Math.pow(freq/100,2));gainDb+=s.eqMid1Gain*Math.exp(-Math.pow(Math.log(freq/822),2)*2);gainDb+=s.eqMid2Gain*Math.exp(-Math.pow(Math.log(freq/3200),2)*2);gainDb+=s.eqHighGain/(1+Math.pow(10000/freq,2));}const y=h/2-gainDb/18*(h/2);if(x===0)eqCtx.moveTo(x,y);else eqCtx.lineTo(x,y);}eqCtx.stroke();}// Imager Vectorscope (real M/S polar trace) + Phase Correlation meter
 const imagerCanvas=imagerCanvasRef.current;if(imagerCanvas){const iw=imagerCanvas.width,ih=imagerCanvas.height;const ic=imagerCanvas.getContext('2d');ic.clearRect(0,0,iw,ih);// Reference circle + crosshair
@@ -802,11 +805,11 @@ if(woChannelRef.current==='stereo'||woChannelRef.current==='right'){woCtx.stroke
 const dragChainIndexRef=React.useRef(null);const[addModuleOpen,setAddModuleOpen]=React.useState(false);// Carla Bridge (VST FX) — danh sách VST để load vào Carla (master chain)
 const[masterCarlaVsts,setMasterCarlaVsts]=React.useState(null);// null = chưa load
 React.useEffect(()=>{if(isOpen&&window.SonicAPI&&window.SonicAPI.listPlugins){window.SonicAPI.listPlugins().then(d=>setMasterCarlaVsts(d&&d.vst_instruments||[])).catch(()=>setMasterCarlaVsts([]));}},[isOpen]);if(!isOpen)return null;const switchModule=name=>setOzState(prev=>({...prev,activeModule:name}));// ── Mastering expand: dynamic module chain (mastering_expand.md §II.3) ──
-const MODULE_META={eq:{name:'Dynamic EQ',sub:'4-Band Peak',icon:'activity',color:'#22d3ee'},eqpro:{name:'Parametric / Graphic EQ PRO',sub:'Pro-Q style · 8 bands · interactive',icon:'chart-area',color:'#2dd4bf'},imager:{name:'Imager',sub:'4-Band Width',icon:'radio',color:'#a855f7'},maximizer:{name:'Maximizer',sub:'IRC IV True Peak',icon:'gauge',color:'#34d399'},compressor:{name:'Bus Compressor',sub:'Glue & Punch',icon:'compress',color:'#fbbf24'},limiter:{name:'Brickwall Limiter',sub:'True-Peak 20:1',icon:'shield-half',color:'#f43f5e'},exciter:{name:'Harmonic Exciter',sub:'Saturation & Air',icon:'wand-2',color:'#c084fc'},rebalance:{name:'Master Rebalance',sub:'M/S Balance',icon:'sliders-horizontal',color:'#38bdf8'},carla:{name:'Carla Bridge (VST FX)',sub:'Native VST audio processing',icon:'sliders',color:'#14b8a6'},vst3:{name:'VST FX',sub:'VST3 plugin',icon:'plug',color:'#2dd4bf'}};const chainFlag=type=>type==='eq'?'eqActive':type==='eqpro'?'eqproActive':type==='imager'?'imagerActive':type==='maximizer'?'maximizerActive':type==='compressor'?'compActive':type==='limiter'?'limActive':type==='exciter'?'excActive':type==='carla'?'carlaBridgeActive':type==='vst3'?'vstFxActive':'rebalActive';const chainActive=type=>!!ozState[chainFlag(type)];const toggleChainModule=modId=>{setOzState(prev=>{const chain=prev.chain.map(m=>{if(m.id!==modId)return m;const next=!m.active;return{...m,active:next};});const flags={};chain.forEach(m=>{flags[chainFlag(m.type)]=!!m.active;});const target=chain.find(m=>m.id===modId);let vstFxChain=prev.vstFxChain||[];if(target&&target.type==='vst3'){const vi=vstFxChain.findIndex(s=>s.path===target.path);if(vi>=0)vstFxChain=vstFxChain.map((s,si)=>si===vi?{...s,bypass:!target.active}:s);}return{...prev,chain,...flags,vstFxChain};});};const removeChainModule=modId=>{setOzState(prev=>{const removed=prev.chain.find(m=>m.id===modId);let chain=prev.chain.filter(m=>m.id!==modId);if(chain.length===0)chain=DEFAULT_MASTER_CHAIN.map(m=>({...m}));// keep ≥1
+const MODULE_META={eq:{name:'Dynamic EQ',sub:'4-Band Peak',icon:'activity',color:'#22d3ee'},eqpro:{name:'Parametric / Graphic EQ PRO',sub:'Pro-Q style · 8 bands · interactive',icon:'chart-area',color:'#2dd4bf'},imager:{name:'Imager',sub:'4-Band Width',icon:'radio',color:'#a855f7'},maximizer:{name:'Maximizer',sub:'IRC IV True Peak',icon:'gauge',color:'#34d399'},compressor:{name:'Bus Compressor',sub:'Glue & Punch',icon:'compress',color:'#fbbf24'},limiter:{name:'Brickwall Limiter',sub:'True-Peak 20:1',icon:'shield-half',color:'#f43f5e'},exciter:{name:'Harmonic Exciter',sub:'Saturation & Air',icon:'wand-2',color:'#c084fc'},rebalance:{name:'Master Rebalance',sub:'M/S Balance',icon:'sliders-horizontal',color:'#38bdf8'},carla:{name:'Carla Bridge (VST FX)',sub:'Native VST audio processing',icon:'sliders',color:'#14b8a6'},vst3:{name:'VST FX',sub:'VST3 plugin',icon:'plug',color:'#2dd4bf'}};const chainFlag=type=>type==='eq'?'eqActive':type==='eqpro'?'eqproActive':type==='imager'?'imagerActive':type==='maximizer'?'maximizerActive':type==='compressor'?'compActive':type==='limiter'?'limActive':type==='exciter'?'excActive':type==='carla'?'carlaBridgeActive':type==='vst3'?'vstFxActive':'rebalActive';const chainActive=type=>!!ozState[chainFlag(type)];const toggleChainModule=modId=>{setOzState(prev=>{const chain=prev.chain.map(m=>{if(m.id!==modId)return m;const next=!m.active;return{...m,active:next};});const flags={};chain.forEach(m=>{flags[chainFlag(m.type)]=!!m.active;});const target=chain.find(m=>m.id===modId);let vstFxChain=prev.vstFxChain||[];if(target&&target.type==='vst3'){const vi=vstFxChain.findIndex(s=>s.path===target.path);if(vi>=0)vstFxChain=vstFxChain.map((s,si)=>si===vi?{...s,bypass:!target.active}:s);}return{...prev,chain,...flags,vstFxChain};});};const removeChainModule=modId=>{const removedMod=(ozState.chain||[]).find(m=>m.id===modId);if(removedMod&&removedMod.type==='vst3'&&masterGuiOpen&&masterGuiOpen.path===removedMod.path)closeMasterGui();setOzState(prev=>{const removed=prev.chain.find(m=>m.id===modId);let chain=prev.chain.filter(m=>m.id!==modId);if(chain.length===0)chain=DEFAULT_MASTER_CHAIN.map(m=>({...m}));// keep ≥1
 const flags={};chain.forEach(m=>{flags[chainFlag(m.type)]=!!m.active;});const activeModule=prev.activeModule;let vstFxChain=prev.vstFxChain||[];if(removed&&removed.type==='vst3'){const vi=vstFxChain.findIndex(s=>s.path===removed.path);if(vi>=0)vstFxChain=[...vstFxChain.slice(0,vi),...vstFxChain.slice(vi+1)];}return{...prev,chain,...flags,vstFxChain,activeModule:chain.some(m=>m.type===activeModule)?activeModule:chain[chain.length-1].type};});};const reorderChain=(fromIdx,toIdx)=>{if(fromIdx===toIdx)return;setOzState(prev=>{const chain=[...prev.chain];const moved=chain.splice(fromIdx,1)[0];chain.splice(toIdx,0,moved);return{...prev,chain};});};const addModuleToChain=type=>{const meta=MODULE_META[type];const id='mod_'+type+'_'+Date.now();const entry={id,type,name:meta.name,active:true};if(type==='eqpro')entry.params={amount:100,bands:JSON.parse(JSON.stringify(EQPRO_DEFAULT_BANDS))};if(type==='carla')entry.params={plugin:'',plugin_path:''};setOzState(prev=>({...prev,chain:[...(prev.chain||[]),entry],[chainFlag(type)]:true,activeModule:type}));setAddModuleOpen(false);};const addVstToChain=path=>{const fx=(masterFxList||[]).find(f=>f.path===path);if(!fx)return;const id='mod_vst_'+Date.now();const entry={id,type:'vst3',path:fx.path,name:fx.name||fx.id,preset_b64:'',bypass:false,active:true};setOzState(prev=>({...prev,chain:[...(prev.chain||[]),entry],vstFxChain:[...(prev.vstFxChain||[]),{type:'vst3',path:fx.path,name:fx.name||fx.id,preset_b64:'',bypass:false}]}));setAddModuleOpen(false);};const updateChainEntryParams=(modId,patch)=>{setOzState(prev=>({...prev,chain:(prev.chain||[]).map(m=>m.id===modId?{...m,params:{...(m.params||{}),...patch}}:m)}));};// ── EQ Preset Library (mastering_expand.md §II.1) ──
 const EQ_PRESET_LIBRARY={flat:{name:'Flat / Reset',bands:[{id:1,type:'lowshelf',freq:100,gain:0.0,q:0.7},{id:2,type:'peaking',freq:800,gain:0.0,q:0.7},{id:3,type:'peaking',freq:3200,gain:0.0,q:1.2},{id:4,type:'highshelf',freq:10000,gain:0.0,q:0.7}]},vocal_clarity:{name:'Vocal Unmask & Clarity',bands:[{id:1,type:'lowshelf',freq:90,gain:-2.5,q:0.7},{id:2,type:'peaking',freq:500,gain:-1.8,q:1.0},{id:3,type:'peaking',freq:2800,gain:3.2,q:1.2},{id:4,type:'highshelf',freq:12000,gain:2.0,q:0.7}]},bass_punch:{name:'EDM Low-End Punch',bands:[{id:1,type:'lowshelf',freq:80,gain:4.0,q:0.8},{id:2,type:'peaking',freq:300,gain:-3.0,q:1.4},{id:3,type:'peaking',freq:4000,gain:1.5,q:1.0},{id:4,type:'highshelf',freq:10000,gain:1.0,q:0.7}]},warm_tape:{name:'Warm Vintage Analog',bands:[{id:1,type:'lowshelf',freq:120,gain:2.0,q:0.6},{id:2,type:'peaking',freq:1500,gain:1.0,q:0.5},{id:3,type:'peaking',freq:5000,gain:-2.0,q:1.0},{id:4,type:'highshelf',freq:8000,gain:-3.0,q:0.7}]}};const applyEQPreset=presetKey=>{const preset=EQ_PRESET_LIBRARY[presetKey];if(!preset)return;const bus=masterBus;if(bus&&bus.eqLowFilter){const now=audioCtx?audioCtx.currentTime:0;const filters=[bus.eqLowFilter,bus.eqMid1Filter,bus.eqMid2Filter,bus.eqHighFilter];preset.bands.forEach((bd,i)=>{const f=filters[i];if(!f)return;try{// setValueAtTime (không automation) — tránh "BiquadFilterNode: state is bad"
 f.frequency.setValueAtTime(bd.freq,now);f.gain.setValueAtTime(bd.gain,now);f.Q.setValueAtTime(bd.q,now);}catch(e){}});}// Sync UI knobs + canvas: [eqLowGain, eqMid1Gain, eqMid2Gain, eqHighGain]
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text-[10px] font-bold border transition-colors ${ozState.isBypassed?'bg-cyan-600 border-cyan-500 text-white':'bg-slate-800 hover:bg-slate-700 text-slate-200 border-slate-700'}`},"Bypass"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-200 py-1.5 rounded text-[10px] font-bold border border-slate-700 transition-colors"},"Gain Match"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700"},"Codec"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700"},"Dither"))))),addModuleOpen&&/*#__PURE__*/React.createElement("div",{className:"fixed inset-0 z-[110] bg-black/80 backdrop-blur-sm flex items-center justify-center p-4",onClick:()=>setAddModuleOpen(false)},/*#__PURE__*/React.createElement("div",{className:"w-full max-w-lg bg-slate-900 border border-slate-700 rounded-2xl p-5 space-y-4 shadow-2xl max-h-[80vh] overflow-y-auto",onClick:e=>e.stopPropagation()},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between border-b border-slate-800 pb-3"},/*#__PURE__*/React.createElement("h3",{className:"text-xs font-bold text-white uppercase tracking-wider oz-font-mono"},"TH\xCAM MODULE V\xC0O MASTERING CHAIN"),/*#__PURE__*/React.createElement("button",{onClick:()=>setAddModuleOpen(false),className:"text-slate-400 hover:text-white"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-4 h-4"}))),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-2 gap-3 text-xs"},[{t:'eqpro',c:'text-teal-400',i:'chart-area',d:'Parametric / Graphic EQ PRO — Pro-Q style, 8 bands, interactive canvas + spectrum.'},{t:'compressor',c:'text-amber-400',i:'compress',d:'Nén dynamic range, glue & punch cho master.'},{t:'limiter',c:'text-rose-400',i:'shield-half',d:'True-Peak ceiling (ratio 20:1, knee 0) chống clipping.'},{t:'exciter',c:'text-purple-400',i:'wand-2',d:'Saturation hài cho warmth và top-end brilliance.'},{t:'rebalance',c:'text-sky-400',i:'sliders-horizontal',d:'Cân bằng Mid/Side (Vocal/Bass vs stereo width).'},{t:'eq',c:'text-cyan-400',i:'activity',d:'EQ 4-band (lowshelf, 2× peaking, highshelf) + presets.'},{t:'imager',c:'text-fuchsia-400',i:'radio',d:'Stereo width 4-band M/S + vectorscope/correlation.'},{t:'maximizer',c:'text-emerald-400',i:'gauge',d:'Maximizer: boost, soft clip, upward comp, ceiling.'}].map(m=>/*#__PURE__*/React.createElement("button",{key:m.t,onClick:()=>addModuleToChain(m.t),className:"p-3 bg-slate-950 hover:bg-slate-800 border border-slate-800 rounded-xl text-left space-y-1 transition-colors"},/*#__PURE__*/React.createElement("div",{className:`font-bold ${m.c} flex items-center gap-1.5`},/*#__PURE__*/React.createElement("i",{"data-lucide":m.i,className:"w-3.5 h-3.5"})," ",MODULE_META[m.t].name),/*#__PURE__*/React.createElement("div",{className:"text-[10px] text-slate-400"},m.d)))),/*#__PURE__*/React.createElement("div",{className:"border-t border-slate-800 pt-3"},/*#__PURE__*/React.createElement("div",{className:"text-[10px] font-bold text-teal-400 uppercase tracking-wider oz-font-mono mb-2"},"VST FX (Ozone...)"),/*#__PURE__*/React.createElement("button",{onClick:()=>setMasterVstPickerOpen(true),className:"w-full bg-slate-950 hover:bg-slate-800 border border-dashed border-slate-700 hover:border-teal-600 text-teal-300 rounded px-2 py-2 text-[11px] text-left transition-colors",title:"Plugin Picker theo category (EQ / Reverb / Comp / Utility)"},/*#__PURE__*/React.createElement("i",{"data-lucide":"plug",className:"w-3 h-3 inline-block mr-1"})," Ch\u1ECDn VST FX t\u1EEB th\u01B0 vi\u1EC7n \u2014 Picker: EQ / Reverb / Comp / Utility")))),/*#__PURE__*/React.createElement(VstPluginPicker,{open:masterVstPickerOpen,onClose:()=>setMasterVstPickerOpen(false),plugins:masterFxList,onPick:f=>addVstToChain(f.path)}));};// ── Media Explorer Panel (from md/51_MEDIA_EXPLORER.md) ──
 const MEDIA_LIBRARY_SAMPLES=[{name:"MIDI_Loop_01.mid",events:95,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_02_Bass.mid",events:48,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_03_Lead.mid",events:110,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_04.mid",events:76,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_05_Bass.mid",events:52,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"},{name:"MIDI_Loop_06.mid",events:88,lengthQn:16,time:"0:08.000",tpqn:480,bpm:130,kind:"midi"}];const MediaExplorerPanel=({height,clipboardRef,active})=>{const[userFiles,setUserFiles]=React.useState([]);const[folder,setFolder]=React.useState('library');const[selected,setSelected]=React.useState(null);const[filterText,setFilterText]=React.useState('');const[viewMode,setViewMode]=React.useState('details');const[isPlaying,setIsPlaying]=React.useState(false);const[isPaused,setIsPaused]=React.useState(false);const[isLooping,setIsLooping]=React.useState(false);const[autoPlay,setAutoPlay]=React.useState(true);const[pitch,setPitch]=React.useState(0.0);const[rate,setRate]=React.useState(1.0);const[volumeDb,setVolumeDb]=React.useState(0.0);const[currentTime,setCurrentTime]=React.useState(0);const[peaks,setPeaks]=React.useState(null);const[audioBuffer,setAudioBuffer]=React.useState(null);const[audioDuration,setAudioDuration]=React.useState(0);const[midiNotes,setMidiNotes]=React.useState(null);const[midiTotal,setMidiTotal]=React.useState(4);const[midiBars,setMidiBars]=React.useState(1);const[midiTotalBeats,setMidiTotalBeats]=React.useState(16);const[midiFileBpm,setMidiFileBpm]=React.useState(120);const[tempo,setTempo]=React.useState(function(){var saved=localStorage.getItem('studio_media_explorer_tempo');return saved?parseInt(saved):120;});const[tempoText,setTempoText]=React.useState(String(function(){var saved=localStorage.getItem('studio_media_explorer_tempo');return saved?parseInt(saved):120;}()));const[zoom,setZoom]=React.useState(1.0);// Đồng bộ zoom ra window ref — serializeProjectToSchema lưu vào metadata.zoom
 // (module-level không truy cập state) → restore/open khôi phục đúng zoom.
 React.useEffect(()=>{window.__currentZoom=zoom;},[zoom]);const[scrollOffset,setScrollOffset]=React.useState(0);const scrollOffsetRef=React.useRef(0);scrollOffsetRef.current=scrollOffset;const[selStart,setSelStart]=React.useState(null);const[selEnd,setSelEnd]=React.useState(null);const[isDragging,setIsDragging]=React.useState(false);const[previewCtxMenu,setPreviewCtxMenu]=React.useState(null);// { x, y }
diff --git a/app/templates/index.html b/app/templates/index.html
index 299368a..e1a3c0a 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -50,7 +50,7 @@
     <script src="/static/js/services/midiExtractor.js?v=202607281052"></script>
     <script src="/static/js/services/promptTemplateManager.js?v=202607281039"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202607290941"></script>
-    <script src="/static/js/app.precompiled.js?v=202608182330" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608182350" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {