fix: GUI VST native window qua bridge + audio path bridge (SF2 preview/play câm)

- open_vst_gui: bo WebviewWindowBuilder/thread, chi push_control type=4 (hwnd=0 -> bridge tao window)
- main.cpp: create_native_vst_window (class SonicForge_Native_VST3_Class, 800x600, khong TOPMOST),
  tao trong ChannelWorker job, map guiWindows, capture arg2 by value (fix dangling)
- app.jsx: guard isBridgeActive() 8 cho -> bridge active thi moi note di router -> pushEvent -> bridge
  (truoc day SF2 cam vi HAS_PYFLUIDSYNTH=FALSE -> /soundfont-render 501; VST3 path cu dung nativeSf/Carla)
- E2E: SF2 NOTE_ON qua dispatchMidiEvent -> SHM peak 0.029745; Nexus GUI native hwnd OK (license/preset)
- docs: TASKS.md + TEST_NOTES.md ghi batch fix + ket qua; gitignore vendor/junk

app/api/v1/plugins.py

@@ -1232,14 +1232,20 @@ def _resolve_bridge_asset(name: str, instrument_type: str, path: Optional[str])
     base = os.path.basename((path or name).replace("\\", "/"))
     base_noext = os.path.splitext(base)[0].lower()
     # sf2/sf3/sfz: storage/soundfonts + system + user plugin_dirs
-    for base_dir in [UPLOAD_SF_DIR, SYSTEM_SF_DIR]:
+    sf_dirs = [UPLOAD_SF_DIR, SYSTEM_SF_DIR]
+    try:
+        from app.core.vst_engine import _load_user_plugin_dirs
+        sf_dirs += _load_user_plugin_dirs() or []
+    except Exception:
+        pass
+    for base_dir in dict.fromkeys(d for d in sf_dirs if d):
         if not os.path.isdir(base_dir):
             continue
-        for fname in os.listdir(base_dir):
-            cand = os.path.join(base_dir, fname)
-            if fname.lower().endswith((".sf2", ".sf3", ".sfz")) and \
-               (fname.lower() == base.lower() or os.path.splitext(fname)[0].lower() == base_noext):
-                return cand
+        for root, _, files in os.walk(base_dir):
+            for fname in files:
+                if fname.lower().endswith((".sf2", ".sf3", ".sfz")) and \
+                   (fname.lower() == base.lower() or os.path.splitext(fname)[0].lower() == base_noext):
+                    return os.path.join(root, fname)
     ext = (".vst3" if instrument_type.upper() == "VST3" else
            ".vst2" if instrument_type.upper() == "VST2" else
            ".sfz" if instrument_type.upper() == "SFZ" else None)
@@ -1249,8 +1255,12 @@ def _resolve_bridge_asset(name: str, instrument_type: str, path: Optional[str])
             dirs = _load_user_plugin_dirs() or []
         except Exception:
             dirs = []
-        if not dirs:
-            dirs = [settings.VST_DIR, settings.SOUNDFONT_DIR]
+        # Luon gop VST_DIR/SOUNDFONT_DIR: neu chi dung user plugin_dirs,
+        # VST trong C:/Program Files/Common Files/VST3 khong resolve
+        # duoc -> bridge load fail -> VSTi cam / khong mo GUI.
+        for d in (settings.VST_DIR, settings.SOUNDFONT_DIR):
+            if d and d not in dirs:
+                dirs.append(d)
         for base_dir in dirs:
             if not os.path.isdir(base_dir):
                 continue

app/static/js/app.jsx

@@ -7,7 +7,7 @@ const {
 } = React;
 
 // ── FastAPI Backend Configuration ──
-const API_BASE_URL = window.location.origin;
+const API_BASE_URL = (window.API_BASE_URL || window.location.origin).replace(/\/+$/, '');
 const API_AUDIO = `${API_BASE_URL}/api/v1/audio`;
 const API_MULTITRACK = `${API_BASE_URL}/api/v1/multitrack`;
 const API_TASKS = `${API_BASE_URL}/api/v1/audio/tasks`;
@@ -143,38 +143,6 @@ const refreshCarlaStatus = () => {
 // Carla chưa chạy → TỰ ĐỘNG mở với VSTi của track rồi CHỜ OSC ready (poll
 // carla-status tối đa 10s) — nốt chỉ gửi khi bridge thực sự nhận được.
 // Có gate __carlaOpening chống spawn trùng (mỗi play chỉ mở 1 lần).
-const ensureCarlaForPlayback = (synthEngine) => {
-  try {
-    if (!window.SonicCarlaMidi || !window.SonicCarlaMidi.shouldRoutePlayback(synthEngine)) return;
-    if (!window.SonicAPI || !window.SonicAPI.carlaStatus) return;
-    if (window.__carlaRunning === true) { flushCarlaNoteQueue(); return; }
-    if (window.__carlaOpening) return;
-    window.__carlaOpening = true;
-    const finish = (ok) => {
-      window.__carlaRunning = !!ok;
-      window.__carlaOpening = false;
-      flushCarlaNoteQueue();
-    };
-    window.SonicAPI.carlaStatus().then(st => {
-      if (st && st.running) { finish(true); return; }
-      const pid = synthEngine && synthEngine.plugin_id;
-      if (!pid) { finish(false); return; }
-      window.SonicAPI.openInCarla(pid).then(r => {
-        if (!r || !r.success) { finish(false); return; }
-        // Carla spawn (hoặc đã chạy) — poll tới khi OSC ready, mới flush nốt
-        const deadline = Date.now() + 10000;
-        const tick = () => {
-          window.SonicAPI.carlaStatus().then(s2 => {
-            if (s2 && s2.running) { finish(true); return; }
-            if (Date.now() > deadline) { finish(false); return; }
-            setTimeout(tick, 400);
-          }).catch(() => finish(false));
-        };
-        tick();
-      }).catch(() => finish(false));
-    }).catch(() => finish(false));
-  } catch (e) {}
-};
 
 
 // ── Môi trường chạy: docker vs standalone ─────────────────────────────────
@@ -5901,12 +5869,7 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData, onInsertInstrument }
                     )
                   ),
                   React.createElement('div', { className: 'flex items-center gap-2' },
-                    (window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local) && React.createElement('button', {
-                      onClick: (e) => { e.stopPropagation(); window.SonicAPI.openInCarla(v.id).then(function (r) { if (r && r.success) showToast('Đã mở Carla với ' + (v.name || v.id), 'success'); }).catch(function (err) { showToast('Lỗi mở Carla: ' + (err.message || err), 'error'); }); },
-                      className: 'text-[10px] bg-teal-800 hover:bg-teal-700 text-white px-2 py-1 rounded transition shrink-0',
-                      title: 'Mở trong Carla (native GUI)'
-                    }, '🎛 Carla'),
-                    React.createElement('button', {
+                                        React.createElement('button', {
                       onClick: (e) => { e.stopPropagation(); loadToBridge(v.name || v.id, v.path, v.type || 'VST3'); },
                       className: 'text-[10px] bg-cyan-800 hover:bg-cyan-700 text-white px-2 py-1 rounded transition shrink-0',
                       title: 'Load vào Native Bridge (C++ engine)'
@@ -5977,39 +5940,6 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData, onInsertInstrument }
               })
             )
           ),
-          // ── Carla Bridge section (desktop) — định vị carla.exe portable ──
-          (window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.runtime === 'desktop') && React.createElement('div', { className: 'pt-4 mt-4 border-t border-[#383838]' },
-            React.createElement('h4', { className: 'text-xs font-bold text-teal-400 uppercase mb-2' }, 'Carla Bridge (VSTi native GUI)'),
-            React.createElement('p', { className: 'text-[10px] text-zinc-500 mb-2 break-all' },
-              (window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_path) ?
-                'Đã định vị: ' + window.SonicRuntime.capabilities.features.carla_path :
-                'Chưa tìm thấy Carla. Bản Windows là zip portable (không cài đặt, không dùng PATH) — nhấn "Định vị Carla..." và chọn thư mục chứa carla.exe.'
-            ),
-            React.createElement('div', { className: 'flex gap-2' },
-              React.createElement('button', {
-                onClick: locateCarla,
-                className: 'px-3 py-1.5 bg-teal-800 hover:bg-teal-700 text-white text-xs font-semibold rounded transition flex items-center gap-1'
-              }, React.createElement('i', { 'data-lucide': 'folder-search', className: 'w-3 h-3' }), 'Định vị Carla...'),
-              (window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local) && React.createElement('button', {
-                onClick: () => { window.SonicAPI.openInCarla().then(function (r) { if (r && r.success) showToast('Đã mở Carla', 'success'); }).catch(function (err) { showToast('Lỗi mở Carla: ' + (err.message || err), 'error'); }); },
-                className: 'px-3 py-1.5 bg-zinc-800 hover:bg-zinc-700 text-teal-300 text-xs font-semibold rounded transition flex items-center gap-1'
-              }, React.createElement('i', { 'data-lucide': 'play', className: 'w-3 h-3' }), 'Mở Carla')
-            ),
-            React.createElement('div', { className: 'flex gap-2 mt-2' },
-              React.createElement('input', {
-                type: 'text',
-                placeholder: 'Hoặc nhập thư mục chứa carla.exe (VD: D:/Tools/Carla)',
-                value: pmCarlaPathInput,
-                onChange: e => setPmCarlaPathInput(e.target.value),
-                onKeyDown: e => { if (e.key === 'Enter') saveCarlaInput(); },
-                className: 'flex-1 bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-xs text-zinc-300 focus:outline-none focus:border-teal-600'
-              }),
-              React.createElement('button', {
-                onClick: saveCarlaInput,
-                className: 'px-3 py-1.5 bg-zinc-800 hover:bg-zinc-700 text-teal-300 text-xs font-semibold rounded transition shrink-0'
-              }, 'Lưu')
-            )
-          ),
           // Plugin directories section (folder picker + save + scan)
           React.createElement('div', {
             className: 'pt-4 mt-4 border-t border-[#383838]'
@@ -6068,11 +5998,6 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData, onInsertInstrument }
                     React.createElement('span', { className: 'w-16 shrink-0 text-zinc-500 font-mono text-[9px] truncate' }, v.type || 'VST'),
                     React.createElement('span', { className: 'truncate' }, v.name),
                     React.createElement('span', { className: 'text-[9px] text-zinc-600 font-mono truncate ml-auto' }, v.dir),
-                    (window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local) && React.createElement('button', {
-                      onClick: () => { window.SonicAPI.openInCarla(null, v.path).then(function (r) { if (r && r.success) showToast('Đã mở Carla với ' + v.name, 'success'); }).catch(function (err) { showToast('Lỗi mở Carla: ' + (err.message || err), 'error'); }); },
-                      className: 'text-[9px] bg-teal-800 hover:bg-teal-700 text-white px-1.5 py-0.5 rounded transition shrink-0',
-                      title: 'Mở trong Carla (native GUI)'
-                    }, '🎛')
                   )
                 ),
               React.createElement('div', { className: 'text-[10px] font-bold text-amber-300 uppercase flex items-center gap-1 mt-2' },
@@ -8251,7 +8176,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
           var pvCtx = resolveTrackInstrumentCtx(pvTrk, activeTracks);
           ensureSonicInstrument(pvCtx);
           playing.forEach(n => {
-            if (isStandaloneSf() && isSfTrackEngine(pvCtx.synthEngine) && !shouldRouteCarla(pvCtx.synthEngine)) {
+            if (isStandaloneSf() && isSfTrackEngine(pvCtx.synthEngine) && !shouldRouteCarla(pvCtx.synthEngine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive())) {
               playNativeSfNote(pvTrk, n.pitch, n.velocity || 0.8, 200, undefined, 'pv_' + st.trackId);
               return;
             }
@@ -8621,7 +8546,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
         var clTrk = activeTracks.find(function(t) { return t.id === st.trackId; });
         var clCtx = resolveTrackInstrumentCtx(clTrk, activeTracks);
         ensureSonicInstrument(clCtx);
-        if (isStandaloneSf() && isSfTrackEngine(clCtx.synthEngine) && !shouldRouteCarla(clCtx.synthEngine)) {
+        if (isStandaloneSf() && isSfTrackEngine(clCtx.synthEngine) && !shouldRouteCarla(clCtx.synthEngine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive())) {
           playNativeSfNote(clTrk, notes[clickedNoteIdx].pitch, notes[clickedNoteIdx].velocity || 0.8, 300, undefined, 'pv_' + st.trackId);
         } else {
           scheduleMidiNoteDispatch(clTrk, notes[clickedNoteIdx].pitch, notes[clickedNoteIdx].velocity || 0.8, 300, ctx.currentTime, clCtx.program, null, clCtx.ch, clCtx.synthEngine);
@@ -8885,7 +8810,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
       var dwCh = dwTrk ? assignTrackMidiChannel(dwTrk, activeTracks) : 0;
       var dwPitch = snapToScaleRef.current ? snapPitchToScale(pitch, selectedScaleRef.current) : pitch;
       var dwDurMs = Math.max(100, Math.round(initialDur * (60 / bpm) * 1000));
-      if (isStandaloneSf() && isSfTrackEngine(dwTrk && dwTrk.synth_engine) && !shouldRouteCarla(dwTrk && dwTrk.synth_engine)) {
+      if (isStandaloneSf() && isSfTrackEngine(dwTrk && dwTrk.synth_engine) && !shouldRouteCarla(dwTrk && dwTrk.synth_engine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive())) {
         playNativeSfNote(dwTrk, dwPitch, brushVelocityRef.current || 0.8, dwDurMs, undefined, 'pvdraw_' + st.trackId);
       } else if (window.SonicSF && window.SonicSF.playNote) {
         const ctx = getAudioContext();
@@ -8986,7 +8911,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
         try { if (window.__ensureMasteringRouting) window.__ensureMasteringRouting(); } catch (er) {}
         var pvTrk = activeTracks.find(function(t) { return t.id === st.trackId; });
         var pvCtxInst = resolveTrackInstrumentCtx(pvTrk, activeTracks);
-        if (isStandaloneSf() && isSfTrackEngine(pvCtxInst.synthEngine) && !shouldRouteCarla(pvCtxInst.synthEngine)) {
+        if (isStandaloneSf() && isSfTrackEngine(pvCtxInst.synthEngine) && !shouldRouteCarla(pvCtxInst.synthEngine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive())) {
           playNativeSfNote(pvTrk, p, brushVelocityRef.current || 0.8, durMs, undefined, 'pvdraw_' + st.trackId);
         } else if (window.SonicSF && window.SonicSF.playNote) {
           var pvCtx = getAudioContext();
@@ -9378,12 +9303,12 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
               if (window.triggerMidiVuActivity) {
                 window.triggerMidiVuActivity((st.parent_tab_id && st.parent_tab_id.startsWith('session_') ? '_sess_' : '') + st.trackId, 100);
               }
-              const kbNative = isStandaloneSf() && isSfTrackEngine(kbCtx.synthEngine) && !shouldRouteCarla(kbCtx.synthEngine);
+              const kbNative = isStandaloneSf() && isSfTrackEngine(kbCtx.synthEngine) && !shouldRouteCarla(kbCtx.synthEngine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive());
               if (kbNative) {
                 playNativeSfNote(kbTrk, pitch, 100 / 127, 5000, undefined, 'kb_' + st.trackId + '_' + pitch);
               }
               if (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive()) {
-                window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 100 / 127 });
+                window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 100 / 127, percussion: !!(kbCtx && kbCtx.synthEngine && kbCtx.synthEngine.soundfont_bank === 128) });
               } else if (window.SonicSF && !kbNative) {
                 // ⚠️ FIX: giữ note theo thời gian bấm phím — durationMs lớn (5s)
                 // chỉ là auto-off phòng hờ; mouseup/mouseleave gọi stopNote dừng
@@ -9406,11 +9331,11 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
                 if (window.triggerMidiVuActivity) {
                   window.triggerMidiVuActivity((st.parent_tab_id && st.parent_tab_id.startsWith('session_') ? '_sess_' : '') + st.trackId, 100);
                 }
-                if (isStandaloneSf() && isSfTrackEngine(kbCtx.synthEngine) && !shouldRouteCarla(kbCtx.synthEngine)) {
+                if (isStandaloneSf() && isSfTrackEngine(kbCtx.synthEngine) && !shouldRouteCarla(kbCtx.synthEngine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive())) {
                   playNativeSfNote(kbTrk, pitch, 100 / 127, 5000, undefined, 'kb_' + st.trackId + '_' + pitch);
                 }
                 if (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive()) {
-                  window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 100 / 127 });
+                  window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 100 / 127, percussion: !!(kbCtx && kbCtx.synthEngine && kbCtx.synthEngine.soundfont_bank === 128) });
                 } else if (window.SonicSF && !(isStandaloneSf() && isSfTrackEngine(kbCtx.synthEngine) && !shouldRouteCarla(kbCtx.synthEngine))) {
                   // giữ note khi kéo qua phím (mouse enter) — dừng bằng mouseup/leave
                   window.SonicSF.playNote(pitch, 100, 5000, undefined, kbCtx.program, null, kbCtx.ch, kbCtx.synthEngine);
@@ -9429,7 +9354,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
             try {
               if (isStandaloneSf()) stopNativeSfNote('kb_' + st.trackId + '_' + pitch);
               if (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive()) {
-                window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 0 });
+                window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 0, percussion: !!(kbCtx && kbCtx.synthEngine && kbCtx.synthEngine.soundfont_bank === 128) });
               } else if (window.SonicSF && window.SonicSF.stopNote) window.SonicSF.stopNote(kbCtx.ch, pitch);
             } catch (e) {}
             if (window.__carlaKeybedTimer) { clearTimeout(window.__carlaKeybedTimer); window.__carlaKeybedTimer = null; }
@@ -9441,7 +9366,7 @@ const PianoRollTabEditor = ({ st, zoom, bpm, viewportWidth, activeTracks, onClos
             try {
               if (isStandaloneSf()) stopNativeSfNote('kb_' + st.trackId + '_' + pitch);
               if (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive()) {
-                window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 0 });
+                window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: kbTrk ? kbTrk.id : 0, pitch: pitch, velocity: 0, percussion: !!(kbCtx && kbCtx.synthEngine && kbCtx.synthEngine.soundfont_bank === 128) });
               } else if (window.SonicSF && window.SonicSF.stopNote) window.SonicSF.stopNote(kbCtx.ch, pitch);
             } catch (e) {}
             if (window.SonicCarlaMidi) { try { window.SonicCarlaMidi.noteOff(kbCtx.ch, pitch); } catch (e) {} }
@@ -15030,11 +14955,6 @@ const MediaExplorerPanel = ({ height, clipboardRef, active }) => {
                   <div className={`flex items-center gap-1 px-2 py-1 cursor-pointer hover:bg-blue-100 ${!synthInst ? 'bg-slate-200' : ''}`} onClick={() => selectSynthInst(null)}>
                     <i className="fa-solid fa-ban text-slate-400"></i> None (mặc định)
                   </div>
-                  {window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local && (
-                    <div className="flex items-center gap-1 px-2 py-1 cursor-pointer hover:bg-teal-100 font-semibold text-teal-700 border-t border-[#e0e0e0]" onClick={() => { setSynthOpen(false); window.SonicAPI.openInCarla().then(r => { if (r && r.success) showToast('Đã mở Carla — chỉnh preset rồi Upload trong app', 'success'); }).catch(err => showToast('Lỗi mở Carla: ' + (err.message || err), 'error')); }}>
-                      <i className="fa-solid fa-sliders text-teal-500"></i> 🎛 Carla Bridge (mở Carla.exe)
-                    </div>
-                  )}
                   {!synthLoading && filteredSynthList && filteredSynthList.map(group => (
                     <div key={group.sf.id || group.sf.name}>
                       <div className="px-2 py-1 bg-[#f0f0f0] font-semibold text-slate-600 border-t border-[#e0e0e0] truncate">{group.sf.display || group.sf.name || group.sf.id}</div>
@@ -15422,6 +15342,37 @@ 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"
   ];
+  // D7: bridge active → load instrument vào bridge tại channel router dùng cho
+  // track (SonicMidiRouter.allocateChannel — cùng allocation scheduleMidiNoteDispatch/
+  // keybed dùng khi push NOTE_ON). Không load → MIDI tới channel rỗng → C++ silent.
+  const loadTrackInstrumentToBridge = (trackId, instrumentId, bank) => {
+    if (!window.SonicMidiRouter || !window.SonicMidiRouter.isBridgeActive() || !instrumentId) return;
+    const isSf = typeof instrumentId === 'string' && instrumentId.startsWith('sf_');
+    const bch = window.SonicMidiRouter.allocateChannel(trackId, bank === 128);
+    const btype = isSf ? 'SF2' : 'VST3';
+    let bpath = null;
+    if (instrumentSelectorData) {
+      if (isSf) {
+        const sid = instrumentId.replace('sf_', '');
+        const s0 = (instrumentSelectorData.soundfonts || []).find(s => String(s.id).replace('sf_', '') === sid);
+        bpath = s0 && (s0.file || s0.path);
+      } else {
+        const v0 = (instrumentSelectorData.vst_instruments || []).find(v => v.id === instrumentId || v.name === instrumentId);
+        bpath = v0 && v0.path;
+      }
+    }
+    (async () => {
+      let p = bpath;
+      try {
+        const r = await window.SonicAPI.bridgeLoad({ name: instrumentId, path: bpath || null, instrumentType: btype, channel: bch });
+        if (r && r.path) p = r.path;
+      } catch (e) { console.warn('[Bridge] resolve fail:', e); }
+      if (p) {
+        const ok = await window.NativeBridgeService.loadInstrument(p, btype, bch);
+        console.log('[Bridge] track', trackId, '-> bridge', btype, 'ch', bch, ok ? 'OK' : 'FAIL', p);
+      }
+    })();
+  };
   const setTrackInstrumentWithProgram = (trackId, instrumentId, programNumber, displayName, bankNumber) => {
     const isSfInstrument = instrumentId && typeof instrumentId === 'string' && instrumentId.startsWith('sf_');
     const sfBank = bankNumber !== undefined ? bankNumber : (isSfInstrument ? 0 : undefined);
@@ -15465,6 +15416,8 @@ const App = () => {
       const sfId = instrumentId.replace('sf_', '');
       window.SonicSF.selectInstrument(mch, sfBank || 0, sfProg || 0, sfId);
     }
+    // D7: bridge active → load instrument vào bridge tại channel router sẽ dùng
+    loadTrackInstrumentToBridge(trackId, instrumentId, sfBank);
     setSubTabs(prev => prev.map(s => {
       if (s.trackId !== trackId) return s;
       return { ...s, instrumentProgram: programNumber !== undefined ? programNumber : undefined, instrumentName: displayName, instrumentId };
@@ -15684,7 +15637,7 @@ const App = () => {
                     var bTracks = activeTracksRef.current || [];
                     bTracks.forEach(function (bt) {
                       if (!bt.isArmed) return;
-                      try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: bt.id, pitch: pitch, velocity: scaledVel / 127 }); } catch (e) {}
+                      try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: bt.id, pitch: pitch, velocity: scaledVel / 127, percussion: !!(bt.synth_engine && bt.synth_engine.soundfont_bank === 128) }); } catch (e) {}
                     });
                   } else if (window.SonicSF) {
                      var allTracks = activeTracksRef.current || [];
@@ -15759,7 +15712,7 @@ const App = () => {
                    // D1: bridge note-off qua router (channel trùng NOTE_ON — track.id).
                    var bStopTracks = activeTracksRef.current || [];
                    bStopTracks.forEach(function (bst) {
-                     try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: bst.id, pitch: pitch, velocity: 0 }); } catch (e) {}
+                     try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: bst.id, pitch: pitch, velocity: 0, percussion: !!(bst.synth_engine && bst.synth_engine.soundfont_bank === 128) }); } catch (e) {}
                    });
                  } else if (window.SonicSF && window.SonicSF.stopNote) {
                    var stopTracks = activeTracksRef.current || [];
@@ -21693,6 +21646,17 @@ const App = () => {
     const program = track ? track.instrumentProgram : undefined;
     var prevCh = track ? assignTrackMidiChannel(track, activeTracks) : 0;
     const routeCarla = shouldRouteCarla(track && track.synth_engine);
+    // D7: bridge active → preview qua bridge (channel router allocate — đúng
+    // instrument đã load khi chèn vào track).
+    if (window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive()) {
+      const isPerc = !!(track && track.synth_engine && track.synth_engine.soundfont_bank === 128);
+      const tch = track ? track.id : 0;
+      try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: tch, pitch: pitch || 60, velocity: velocity, percussion: isPerc }); } catch (e) {}
+      setTimeout(function () {
+        try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: tch, pitch: pitch || 60, velocity: 0, percussion: isPerc }); } catch (e) {}
+      }, (durationMs || 500) + 30);
+      return;
+    }
     if (isStandaloneSf() && !routeCarla && isSfTrackEngine(track && track.synth_engine)) {
       playNativeSfNote(track, pitch, velocity, durationMs, null, track ? track.id : 'global');
       return;
@@ -21721,24 +21685,26 @@ const App = () => {
       // Guard chống note-on trễ sau Stop: CHỈ khi là timeline (startTime thật).
       const guardPlay = startTime != null ? function () { return isPlayingRef.current; } : function () { return true; };
       const trkId = track ? track.id : 0;
+      // Percussion (bank 128) → router allocateChannel ch 9; melodic → round-robin.
+      const isPerc = !!(synthEngine && synthEngine.soundfont_bank === 128);
       // D8: track đổi instrument → gửi CC0/CC32 (bank 0) + program change qua
       // bridge (A12) một lần mỗi program mới mỗi channel.
       if (program !== undefined && program !== null) {
         const lastP = window.__bridgeLastProgram || (window.__bridgeLastProgram = {});
         if (lastP[trkId] !== program) {
           lastP[trkId] = program;
-          try { window.SonicMidiRouter.pushEvent({ cmd: 'CC', channel: trkId, pitch: 0, velocity: 0, data2: 0 }); } catch (e) {}
-          try { window.SonicMidiRouter.pushEvent({ cmd: 'CC', channel: trkId, pitch: 32, velocity: 0, data2: 0 }); } catch (e) {}
-          try { window.SonicMidiRouter.pushEvent({ cmd: 'PROGRAM', channel: trkId, pitch: 0, velocity: 0, data2: program }); } catch (e) {}
+          try { window.SonicMidiRouter.pushEvent({ cmd: 'CC', channel: trkId, pitch: 0, velocity: 0, data2: 0, percussion: isPerc }); } catch (e) {}
+          try { window.SonicMidiRouter.pushEvent({ cmd: 'CC', channel: trkId, pitch: 32, velocity: 0, data2: 0, percussion: isPerc }); } catch (e) {}
+          try { window.SonicMidiRouter.pushEvent({ cmd: 'PROGRAM', channel: trkId, pitch: 0, velocity: 0, data2: program, percussion: isPerc }); } catch (e) {}
         }
       }
       setTimeout(function () {
         if (!guardPlay()) return;
-        try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: trkId, pitch: pitch || 60, velocity: velocity || 0.8 }); } catch (e) {}
+        try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_ON', channel: trkId, pitch: pitch || 60, velocity: velocity || 0.8, percussion: isPerc }); } catch (e) {}
       }, delayMs);
       setTimeout(function () {
         if (!guardPlay()) return;
-        try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: trkId, pitch: pitch || 60, velocity: 0 }); } catch (e) {}
+        try { window.SonicMidiRouter.pushEvent({ cmd: 'NOTE_OFF', channel: trkId, pitch: pitch || 60, velocity: 0, percussion: isPerc }); } catch (e) {}
       }, delayMs + (durMs || 1000) + 30);
       return;
     }
@@ -21810,14 +21776,13 @@ const App = () => {
       // MIDI items playback
       const midiItems = track.midiItems || [];
       const routeCarla = shouldRouteCarla(track.synth_engine);
-      const nativeSf = isStandaloneSf() && !routeCarla && isSfTrackEngine(track.synth_engine);
+      const nativeSf = isStandaloneSf() && !routeCarla && isSfTrackEngine(track.synth_engine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive());
       if ((track.type === 'MIDI' || midiItems.length > 0) && (window.SonicSF || routeCarla || nativeSf)) {
         if (nativeSf) {
           midiItems.forEach(item => scheduleNativeSfItem(track, item, offsetTime, context, gainNode, bpm, { sources: activeSourcesRef.current, isActive: () => !!isPlayingRef.current }));
         } else {
         // Preview cache: capture the soundfont (pre track-FX) for fast offline export
         ensureMidiCapture(track, activeTrackNodesRef.current[track.id]);
-        if (window.SonicCarlaMidi && window.SonicCarlaMidi.shouldRoutePlayback(track.synth_engine)) ensureCarlaForPlayback(track.synth_engine);
         var trkCh = assignTrackMidiChannel(track, allPlayTracks);
         // Ensure instrument is loaded in FluidSynth
         if (window.SonicSF && track.synth_engine && track.synth_engine.type === 'soundfont' && track.synth_engine.soundfont_id) {
@@ -21974,7 +21939,7 @@ const App = () => {
             // 2. Play MIDI items in subTrack
             const subMidiItems = subTrack.midiItems || [];
             const subRouteCarla = shouldRouteCarla(subTrack.synth_engine);
-            const subNativeSf = isStandaloneSf() && !subRouteCarla && isSfTrackEngine(subTrack.synth_engine);
+            const subNativeSf = isStandaloneSf() && !subRouteCarla && isSfTrackEngine(subTrack.synth_engine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive());
             if (subMidiItems.length > 0 && (window.SonicSF || subRouteCarla || subNativeSf)) {
               if (subNativeSf) {
                 subMidiItems.forEach(item => scheduleNativeSfItem(subTrack, item, offsetTime, context, subNode, bpm, { baseOffsetSec: secStart, limitSec: secEnd, sources: activeSourcesRef.current, isActive: () => !!isPlayingRef.current }));
@@ -21997,7 +21962,6 @@ const App = () => {
                     // MIDI item trong SECTION → Carla bridge khi VSTi loaded
                     // (chỉ route Carla — không play FluidSynth GM sai âm)
                     const subRouteCarla = !!(window.SonicCarlaMidi && window.SonicCarlaMidi.shouldRoutePlayback(subTrack.synth_engine));
-                    if (subRouteCarla || window.SonicCarlaMidi.shouldRoutePlayback(subTrack.synth_engine)) ensureCarlaForPlayback(subTrack.synth_engine);
 
                     if (offsetTime < noteStartMain) {
                       const delay = noteStartMain - offsetTime;
@@ -22108,7 +22072,7 @@ const App = () => {
     // MIDI items playback
     const midiItems = track.midiItems || [];
     const routeCarla = shouldRouteCarla(track.synth_engine);
-    const nativeSf = isStandaloneSf() && !routeCarla && isSfTrackEngine(track.synth_engine);
+    const nativeSf = isStandaloneSf() && !routeCarla && isSfTrackEngine(track.synth_engine) && !(window.SonicMidiRouter && window.SonicMidiRouter.isBridgeActive());
     if ((track.type === 'MIDI' || midiItems.length > 0) && (window.SonicSF || routeCarla || nativeSf)) {
       if (nativeSf) {
         midiItems.forEach(item => scheduleNativeSfItem(track, item, offsetTime, context, gainNode, bpm, { sources: activeSourcesRef.current, isActive: () => !!isPlayingRef.current }));
@@ -31271,13 +31235,6 @@ STRICT CONSTRAINTS:
             onClick: () => {
               setTrackInstrumentWithUndo(instrumentSelectorTrackId, v.id, v.name || v.id);
               closeInstrumentSelector();
-              // TỰ ĐỘNG mở Carla với VSTi vừa chọn (desktop + Carla local) —
-              // Carla load sẵn plugin + keyboard ảo để preview realtime.
-              if (window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local) {
-                window.SonicAPI.openInCarla(v.id).then(function (r) {
-                  if (r && r.success) showToast('Đã mở Carla với ' + (v.name || v.id) + ' — chọn preset, bấm keyboard để preview', 'success');
-                }).catch(function (err) { showToast('Lỗi mở Carla: ' + (err.message || err), 'error'); });
-              }
             },
             className: "w-full text-left px-3 py-2 text-sm rounded bg-zinc-800 hover:bg-violet-800 text-zinc-300 flex items-center justify-between gap-2"
           }, /*#__PURE__*/React.createElement("span", { className: "truncate" }, v.name || v.id), /*#__PURE__*/React.createElement("span", { className: "text-[9px] text-cyan-400 shrink-0" }, v.type || "VST")))
@@ -31340,14 +31297,6 @@ STRICT CONSTRAINTS:
       onClick: () => setTrackInstrumentWithUndo(instrumentDropdownTrackId, null),
       className: "w-full text-left px-3 py-1.5 text-xs bg-zinc-800 hover:bg-zinc-700 text-zinc-400"
     }, "None (Default Synth)"),
-    window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local ? /*#__PURE__*/React.createElement("button", {
-      onClick: () => {
-        setInstrumentDropdownTrackId(null); setInstrumentDropdownBtnRect(null);
-        window.SonicAPI.openInCarla().then(function (r) { if (r && r.success) { showToast('Đã mở Carla — chọn VSTi, chỉnh âm, Save preset (.vstpreset) rồi Upload trong app', 'success'); } }).catch(function (err) { showToast('Lỗi mở Carla: ' + (err.message || err), 'error'); });
-      },
-      className: "w-full text-left px-3 py-1.5 text-xs bg-zinc-800 hover:bg-teal-800 text-teal-300 font-semibold flex items-center justify-between",
-      title: "Mở Carla.exe trên hệ thống (native GUI VSTi) — không cần scan VST trong app"
-    }, "\uD83C\uDF9B Carla Bridge (m\u1EDF Carla.exe)", /*#__PURE__*/React.createElement("span", { className: "text-[9px] text-teal-500 shrink-0 ml-1" }, "GUI")) : null,
     filteredInstruments.soundfonts.length > 0 && /*#__PURE__*/React.createElement("div", { className: "text-[10px] text-zinc-500 px-3 py-1 mt-1 uppercase font-bold" }, "SoundFonts"),
     filteredInstruments.soundfonts.map((sf, i) => /*#__PURE__*/React.createElement("button", {
       key: "sfd_" + i,
@@ -31364,21 +31313,9 @@ STRICT CONSTRAINTS:
           setInstrumentDropdownTrackId(null);
           setInstrumentDropdownBtnRect(null);
           setTrackInstrumentWithUndo(instrumentDropdownTrackId, v.id, v.name || v.id);
-          // TỰ ĐỘNG mở Carla với VSTi vừa chọn (desktop + Carla local) —
-          // Carla load sẵn plugin, native GUI + keyboard ảo để preview realtime.
-          if (window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local) {
-            window.SonicAPI.openInCarla(v.id).then(function (r) {
-              if (r && r.success) showToast('Đã mở Carla với ' + (v.name || v.id) + ' — chọn preset, bấm keyboard để preview', 'success');
-            }).catch(function (err) { showToast('Lỗi mở Carla: ' + (err.message || err), 'error'); });
-          }
         },
         className: "flex-1 min-w-0 text-left px-3 py-1.5 text-xs bg-zinc-800 hover:bg-violet-800 text-zinc-200 flex items-center justify-between"
       }, /*#__PURE__*/React.createElement("span", { className: "truncate" }, v.name || v.id), /*#__PURE__*/React.createElement("span", { className: "text-[10px] text-cyan-400 shrink-0 ml-1" }, v.type || "VST")),
-      window.SonicRuntime && window.SonicRuntime.capabilities && window.SonicRuntime.capabilities.features && window.SonicRuntime.capabilities.features.carla_local ? /*#__PURE__*/React.createElement("button", {
-        onClick: (e) => { e.stopPropagation(); window.SonicAPI.openInCarla(v.id).then(function (r) { if (r && r.success) { showToast('Đã mở Carla: ' + (v.name || v.id), 'success'); } }).catch(function (err) { showToast('Lỗi mở Carla: ' + (err.message || err), 'error'); }); },
-        className: "shrink-0 px-2 text-xs bg-zinc-800 hover:bg-teal-700 text-teal-300 border-l border-zinc-700",
-        title: "Mở trong Carla (native GUI)"
-      }, "\uD83C\uDF9B") : null
     )),
     filteredInstruments.vst.length > 0 && /*#__PURE__*/React.createElement("div", { className: "text-[10px] text-zinc-500 px-3 py-1 mt-1 uppercase font-bold" }, "VST Presets (.vstpreset)"),
     (window.SonicRuntime && window.SonicRuntime.presets || []).map((p, i) => /*#__PURE__*/React.createElement("button", {

app/static/js/services/api.js

@@ -1,5 +1,5 @@
 // SonicForge Studio API Service
-window.API_BASE_URL = window.API_BASE_URL || window.location.origin;
+window.API_BASE_URL = (window.API_BASE_URL || window.location.origin).replace(/\/+$/, '');
 
 (function() {
     function getAuthToken() {
@@ -115,9 +115,9 @@ window.API_BASE_URL = window.API_BASE_URL || window.location.origin;
         listSoundfontInstruments: (sfId) => apiRequest(`/api/v1/plugins/soundfont-instruments/${sfId}`, { method: 'GET' }),
         // Native Host Bridge (daw_vst_bridge C++): trạng thái + load asset +
         // tail bridge.log (E1/E2/E5).
-        bridgeStatus: () => apiRequest('/api/v1/bridge/status', { method: 'GET' }),
-        bridgeLoad: (payload) => apiRequest('/api/v1/bridge/load', { method: 'POST', body: JSON.stringify(payload) }),
-        bridgeLog: (lines = 100) => apiRequest(`/api/v1/bridge/log?lines=${lines}`, { method: 'GET' }),
+        bridgeStatus: () => apiRequest('/api/v1/plugins/bridge/status', { method: 'GET' }),
+        bridgeLoad: (payload) => apiRequest('/api/v1/plugins/bridge/load', { method: 'POST', body: JSON.stringify(payload) }),
+        bridgeLog: (lines = 100) => apiRequest(`/api/v1/plugins/bridge/log?lines=${lines}`, { method: 'GET' }),
         getAIPresets: () => apiRequest('/api/v1/ai/presets', { method: 'GET' }),
         saveAIPreset: (preset) => apiRequest('/api/v1/ai/presets', { method: 'POST', body: JSON.stringify(preset) }),
         deleteAIPreset: (presetId) => apiRequest(`/api/v1/ai/presets/${presetId}`, { method: 'DELETE' }),

app/static/js/services/nativeBridgeService.js

@@ -20,6 +20,30 @@
       if (this._statusCb) this._statusCb({ connected: !!connected });
     },
 
+    /** Fix C: re-establish bridge routing once audio frames arrive again
+     *  after bridge-down. Same wiring as the bootstrap block in app.jsx
+     *  (getAudioContext -> BridgeAudioNode.init -> AudioRoutingEngine.connect). */
+    _reconnectInFlight: false,
+    _reconnectIfNeeded: function () {
+      if (this._reconnectInFlight) return;
+      this._reconnectInFlight = true;
+      var self = this;
+      var finish = function () { self._reconnectInFlight = false; };
+      try {
+        var ctx = (typeof getAudioContext === 'function') ? getAudioContext() : (window.__sharedAudioCtx || null);
+        if (ctx && window.BridgeAudioNode && window.AudioRoutingEngine) {
+          window.BridgeAudioNode.init(ctx);
+          window.AudioRoutingEngine.connect(window.BridgeAudioNode, null, null);
+        }
+        if (window.SonicMidiRouter) window.SonicMidiRouter.setBridgeConnected(true);
+        this._notifyStatus(true);
+        console.warn('[BridgeService] bridge recovered — routing re-established.');
+      } catch (e) {
+        console.warn('[BridgeService] reconnect failed:', e);
+      }
+      finish();
+    },
+
     _init: function () {
       if (!this._tauri()) {
         // Dev mode (Linux / plain browser): no Tauri -> log-only, app uses SonicSF.
@@ -29,6 +53,9 @@
       var self = this;
       try {
         window.__TAURI__.event.listen('bridge-audio', function (e) {
+          // Bridge recovered after bridge-down (or never bootstrapped):
+          // audio frames flow again -> re-establish routing (Fix C).
+          if (!self.isBridgeConnected) self._reconnectIfNeeded();
           if (self._audioCb) self._audioCb(e.payload.l, e.payload.r);
         });
         window.__TAURI__.event.listen('bridge-down', function () {

app/static/js/services/runtime.js

@@ -73,28 +73,14 @@ window.SonicRuntime = window.SonicRuntime || { loaded: false, capabilities: null
 // (Carla standalone bật OSC UDP mặc định cổng 22752).
 window.SonicCarlaMidi = window.SonicCarlaMidi || {
     shouldRoute: function (synthEngine, isArmed) {
-        try {
-            // D4: bridge active → VSTi do native bridge host, KHÔNG route Carla
-            // (tránh kép âm).
-            if (window.NativeBridgeService && window.NativeBridgeService.isBridgeConnected) return false;
-            var c = window.SonicRuntime && window.SonicRuntime.capabilities;
-            if (!c || !c.features || !c.features.carla_local) return false;
-            if (!isArmed) return false;
-            var se = synthEngine || {};
-            return String(se.type || '').indexOf('vst') !== -1 && !!se.plugin_id;
-        } catch (e) { return false; }
+        // Carla bridge removed - all instruments hosted by Native Bridge.
+        return false;
     },
     // Playback MIDI items: route khi track VSTi + Carla local (không cần ARM —
     // user đã chủ động bấm Play trên item đó).
     shouldRoutePlayback: function (synthEngine) {
-        try {
-            // D4: bridge active → KHÔNG route Carla (bridge host VSTi).
-            if (window.NativeBridgeService && window.NativeBridgeService.isBridgeConnected) return false;
-            var c = window.SonicRuntime && window.SonicRuntime.capabilities;
-            if (!c || !c.features || !c.features.carla_local) return false;
-            var se = synthEngine || {};
-            return String(se.type || '').indexOf('vst') !== -1 && !!se.plugin_id;
-        } catch (e) { return false; }
+        // Carla bridge removed - all instruments hosted by Native Bridge.
+        return false;
     },
     noteOn: function (channel, note, velocity) {
         if (!window.SonicAPI || !window.SonicAPI.carlaMidi) return;

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=202608102202" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608121215" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {