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 ✅

native_bridge/tests/shm_selfcheck.cpp

@@ -67,8 +67,9 @@ int main() {
     assert(sizeof(SharedAudioBufferIPC::ControlEventIPC) == 1040);
     // G4.5 ring: 11168 (G3.1 +heartbeat) + ringMask(4) + ringLeft(8192) + ringRight(8192)
     // = 27556, rounded up to 8-byte struct alignment (u64 blockTimestamp) => 27560.
-    // Matches Rust size_of (src-tauri/src/shm.rs layout test).
-    assert(sizeof(SharedAudioBufferIPC) == 27560);
+    // A14 midi-out: ring_right ends at 27556; midiOutQueue appends there,
+    // +64*12 + 4 = 28328 (already 8-aligned). Matches Rust size_of (src-tauri/src/shm.rs).
+    assert(sizeof(SharedAudioBufferIPC) == 28328);
 
     // 6. Audio ring round-trip (multi-slot, VSTi crackle fix)
     ipc->ringMask = 7;
@@ -78,7 +79,10 @@ int main() {
     assert(ipc->ringRight[3][0] == 42.0f);
     assert((ipc->bridgeWriteIndex & ipc->ringMask) < 8);
 
-    std::printf("SHM self-check OK (sizeof struct = %zu bytes)\n", sizeof(SharedAudioBufferIPC));
+    std::printf("SHM self-check sizeof struct = %zu bytes\n", sizeof(SharedAudioBufferIPC));
+    std::printf("midiOutQueue offset = %zu, midiOutCount offset = %zu\n",
+               offsetof(SharedAudioBufferIPC, midiOutQueue),
+               offsetof(SharedAudioBufferIPC, midiOutCount));
     shm_close(h);
     return 0;
 }