feat: native host bridge integration — C++ bridge, Rust SHM, JS routing, build scripts, docs

- native_bridge/: InstrumentEngineManager multi-channel, sample-accurate, CC/program/pitchbend, transport, Vst3Instrument stub (HAVE_VST3SDK)
- src-tauri: shm.rs, bridge spawn + audio pump + health monitor, open_vst_gui, externalBin, commands
- app: UnifiedMidiRouter, NativeBridgeService, bridgeAudioNode, audioRoutingEngine, Plugin Manager UI, Bridge/WASM indicator, set_position sync
- build: 3 ps1 (force-added, build/ ignored), verify_bundle --check-bridge, CI workflow
- docs: TASKS.md, TEST_NOTES.md (Windows verify checklist), install/report updates

app/static/js/services/api.js

@@ -113,6 +113,11 @@ window.API_BASE_URL = window.API_BASE_URL || window.location.origin;
         getSoundfontCatalog: () => apiRequest('/api/v1/plugins/soundfonts/catalog', { method: 'GET' }),
         listDefaultSoundfonts: () => apiRequest('/api/v1/plugins/default-soundfonts', { method: 'GET' }),
         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' }),
         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' }),