A14: MIDI-out từ plugin (VST2/VST3) → SHM → Rust emit → DAW track

- Vst2Instrument: audioMaster callback thu VstEvents, push SHM midiOutQueue
- Vst3Instrument: IEventList output bus (kAudioMasterWantMidi) — check
- SharedMemoryIPC.h: midiOutQueue[64] + midiOutCount (offset 27556/28324, sizeof 28328)
- shm.rs: MidiEventIPC Serialize, drain_midi_out() emit 'bridge-midi-out'
- lib.rs: pump emit midi-out events
- nativeBridgeService.js: onMidiOut API
- app.jsx: route MIDI-out về selected track qua SonicMidiRouter (feedback guard)
- TASKS.md: A14 ✅

app/static/js/services/nativeBridgeService.js

@@ -11,6 +11,7 @@
     activeInstrumentType: 'VST3',
     _audioCb: null,
     _statusCb: null,
+    _midiOutCb: null,
     _tauri: function () { return window.__TAURI__; },
 
     /** D10: UI subscribes to bridge connection changes. cb({connected}) or null to clear. */
@@ -58,6 +59,12 @@
           if (!self.isBridgeConnected) self._reconnectIfNeeded();
           if (self._audioCb) self._audioCb(e.payload.l, e.payload.r);
         });
+        // A14: plugin MIDI output (VstEvents -> SHM midiOutQueue -> pump).
+        // Payload: array of {command, channel, pitch, velocity, data2,
+        // data3, reserved, sample_offset}. JS routes notes to DAW tracks.
+        window.__TAURI__.event.listen('bridge-midi-out', function (e) {
+          if (self._midiOutCb) self._midiOutCb(e.payload);
+        });
         window.__TAURI__.event.listen('bridge-down', function () {
           self._notifyStatus(false);
           if (window.SonicMidiRouter) window.SonicMidiRouter.setBridgeConnected(false);
@@ -187,6 +194,13 @@
      */
     onAudio: function (cb) {
       this._audioCb = cb;
+    },
+
+    /** A14: register consumer of plugin MIDI output.
+     *  cb(events): array of {command, channel, pitch, velocity, data2,
+     *  data3, reserved, sample_offset} — route to DAW tracks. */
+    onMidiOut: function (cb) {
+      this._midiOutCb = cb;
     }
   };