diff --git a/.env.example b/.env.example
index 1fa0710..12e03ea 100644
--- a/.env.example
+++ b/.env.example
@@ -23,3 +23,12 @@ STORAGE_DIR=/app/app/storage
 VST_DIR=/home/locpham/daw_assets/vst3
 SOUNDFONT_DIR=/home/locpham/daw_assets/soundfonts
 PIANOBK_DIR=/home/locpham/daw_assets/pianobook
+
+# ── Runtime (tự phát hiện môi trường) ──
+# auto (mặc định): Windows/macOS → desktop; Linux không DISPLAY hoặc docker → headless.
+# desktop: server + client cùng 1 máy (bật nút "Mở trong Carla" nếu có Carla local)
+# headless: server docker + browser UI (soundfont + VSTi mở được từ storage mount;
+#           preset chỉnh trên máy khác → upload .vstpreset qua web UI)
+SF_RUNTIME=auto
+# Ép nhận diện Docker (thường tự detect qua /.dockerenv; đặt =1 nếu cần)
+SF_DOCKER=1
diff --git a/app/api/v1/plugins.py b/app/api/v1/plugins.py
index 0b4903f..7afc66d 100644
--- a/app/api/v1/plugins.py
+++ b/app/api/v1/plugins.py
@@ -1,10 +1,12 @@
 import os, sys, uuid, json, tempfile, subprocess, time as _time
+import numpy as np
+import soundfile as sf
 from fastapi import APIRouter, HTTPException, Depends, UploadFile, File, BackgroundTasks
 from fastapi.responses import FileResponse
 from pydantic import BaseModel
 from typing import Optional, Any
 from app.config import settings
-from app.core.vst_engine import PluginManager, HAS_PEDALBOARD, HAS_PYFLUIDSYNTH
+from app.core.vst_engine import PluginManager, HAS_PEDALBOARD, HAS_PYFLUIDSYNTH, apply_preset_to_plugin
 from app.core.render_engine import PythonRenderEngine
 from app.core.soundfont_inspector import SoundFontInspector
 from app.core.soundfont_converter import SoundFontConverter
@@ -446,6 +448,134 @@ class RenderRequest(BaseModel):
     output_filename: Optional[str] = "render_output.wav"
 
 
+class OpenInCarlaRequest(BaseModel):
+    """Mở native GUI của VSTi trong Carla (chỉ khả dụng khi runtime=desktop
+    và Carla được cài trên cùng máy — tự phát hiện qua runtime profile)."""
+    plugin_name: Optional[str] = None
+    plugin_path: Optional[str] = None
+
+
+class PreviewRequest(BaseModel):
+    """Quick-render preview: pedalboard render clip ngắn bằng ĐÚNG plugin +
+    preset (cùng code path với export) → trả wav để browser phát.
+    Âm preview = âm export (khác Preview Synth WASM hiện tại)."""
+    instrument_id: str
+    notes: list = []
+    bpm: float = 120.0
+    sample_rate: int = 44100
+    soundfont_bank: Optional[int] = 0
+    soundfont_program: Optional[int] = 0
+    preset_id: Optional[str] = None
+    preset_path: Optional[str] = None
+    preset_data: Optional[str] = None  # base64 bytes .vstpreset (project nhúng)
+
+
+@router.post("/open-in-carla")
+async def open_in_carla(req: OpenInCarlaRequest, current_user: dict = Depends(get_current_user)):
+    """Mở Carla (native GUI host) trên máy hiện tại — Windows desktop mode.
+
+    Carla là app ngoài do user tự cài (GPL-2.0+ → không bundle/nhúng). App chỉ
+    spawn tiến trình; user chỉnh preset trong GUI rồi Save → .vstpreset → upload
+    vào thư viện preset → gán vào track → render engine tải preset tương ứng."""
+    enforce_password_changed(current_user)
+    from app.core.runtime import find_carla
+    carla = find_carla()
+    if not carla:
+        raise HTTPException(
+            status_code=409,
+            detail="Không tìm thấy Carla trên máy này. Hãy giải nén bản Carla "
+                   "portable (zip, miễn phí) từ https://github.com/falkTX/Carla/releases, "
+                   "rồi vào Plugin Manager → Carla Bridge → Định vị Carla... để chọn "
+                   "thư mục chứa carla.exe (bản portable không dùng PATH).",
+        )
+    plugin_path = req.plugin_path or ""
+    if not plugin_path and req.plugin_name:
+        try:
+            pm = PluginManager()
+            plugins = pm._scan_plugins()
+            if req.plugin_name in plugins:
+                plugin_path = plugins[req.plugin_name]
+        except Exception:
+            plugin_path = ""
+    cmd = [carla]
+    if plugin_path:
+        # carla-single: mở thẳng 1 plugin thành app standalone có native GUI
+        single = os.path.join(
+            os.path.dirname(carla),
+            "carla-single" + (".exe" if os.name == "nt" else ""),
+        )
+        if os.path.isfile(single):
+            cmd = [single, plugin_path]
+    try:
+        cwd = os.path.dirname(carla) or None
+        subprocess.Popen(cmd, cwd=cwd, close_fds=os.name != "nt")
+        return {
+            "success": True,
+            "started": True,
+            "carla_path": carla,
+            "plugin_path": plugin_path,
+            "cmd": cmd,
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Không mở được Carla: {e}")
+
+
+@router.post("/preview")
+async def preview_instrument(req: PreviewRequest):
+    """Quick-render preview VSTi (âm thật, cùng code path với export)."""
+    if not HAS_PEDALBOARD:
+        raise HTTPException(status_code=501, detail="pedalboard không khả dụng trên máy này")
+    if not req.notes:
+        raise HTTPException(status_code=400, detail="Chưa có nốt nhạc để preview")
+    try:
+        pm = PluginManager()
+        vst = pm.load_vst(req.instrument_id)
+        if vst is None:
+            raise HTTPException(status_code=404, detail=f"Không tìm thấy VSTi: {req.instrument_id}")
+        apply_preset_to_plugin(
+            vst,
+            preset_id=req.preset_id,
+            preset_path=req.preset_path,
+            preset_data_b64=req.preset_data,
+        )
+        from pedalboard import Pedalboard
+        midi_events = []
+        for n in req.notes:
+            midi_events.append({
+                "note": int(n.get("pitch", 60)),
+                "start_beat": float(n.get("start_beat", 0)),
+                "duration_beats": float(n.get("duration_beats", 1)),
+                "velocity": int(float(n.get("velocity", 0.8)) * 127),
+            })
+        midi_messages = PluginManager.midi_events_to_messages(
+            midi_events, req.bpm, req.sample_rate,
+            bank=req.soundfont_bank, program=req.soundfont_program,
+        )
+        total_needed = 0
+        beat_sec = 60.0 / max(30.0, req.bpm)
+        for ev in midi_events:
+            end_sec = (ev["start_beat"] + ev["duration_beats"]) * beat_sec
+            if int(end_sec * req.sample_rate) > total_needed:
+                total_needed = int(end_sec * req.sample_rate)
+        total_needed = max(total_needed, 1024)
+        silent = np.zeros((2, total_needed), dtype=np.float32)
+        board = Pedalboard([vst])
+        buf = board(silent, sample_rate=req.sample_rate, midi_messages=midi_messages)
+        fname = f"preview_{uuid.uuid4().hex[:10]}.wav"
+        out_path = os.path.join(settings.PROCESSED_DIR, fname)
+        sf.write(out_path, buf.T, req.sample_rate)
+        return {
+            "success": True,
+            "url": f"/static/audio/processed/{fname}",
+            "path": out_path,
+            "duration_sec": round(buf.shape[1] / float(req.sample_rate), 3),
+        }
+    except HTTPException:
+        raise
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Preview thất bại: {e}")
+
+
 @router.post("/render")
 async def render_project(
     req: RenderRequest,
diff --git a/app/api/v1/presets.py b/app/api/v1/presets.py
new file mode 100644
index 0000000..486922c
--- /dev/null
+++ b/app/api/v1/presets.py
@@ -0,0 +1,129 @@
+# SonicForge Preset Library API — thư viện preset VST3 (.vstpreset) nằm trong
+# storage/presets (mount qua volume trong docker; thư mục storage trên Windows).
+#
+# Vai trò: cầu nối Carla → pedalboard. User chỉnh preset trong Carla (native
+# GUI) → xuất .vstpreset → upload vào thư viện → gán vào track (preset_id trong
+# synth_engine) → render_engine tải qua load_preset → âm render = âm đã chỉnh.
+import os
+import uuid
+import json
+import time
+
+from fastapi import APIRouter, HTTPException, UploadFile, File, Depends
+from fastapi.responses import FileResponse
+from typing import Optional
+
+from app.core.vst_engine import preset_library_dir, PRESET_EXTENSIONS
+from app.api.v1.auth import get_current_user, enforce_password_changed
+
+router = APIRouter()
+
+
+def _safe_preset_path(preset_id: str) -> str:
+    """Chống path traversal: chỉ cho phép tên file (không chứa separator)."""
+    if not preset_id or os.path.basename(preset_id) != preset_id:
+        return ""
+    d = preset_library_dir()
+    p = os.path.join(d, preset_id)
+    if os.path.isfile(p) and os.path.dirname(os.path.abspath(p)) == os.path.abspath(d):
+        return p
+    return ""
+
+
+@router.get("")
+async def list_presets():
+    """Danh sách preset trong thư viện (public — frontend cần trước login)."""
+    d = preset_library_dir()
+    items = []
+    try:
+        names = sorted(os.listdir(d))
+    except Exception:
+        names = []
+    for f in names:
+        low = f.lower()
+        if not low.endswith(PRESET_EXTENSIONS):
+            continue
+        meta = {}
+        meta_path = os.path.join(d, os.path.splitext(f)[0] + ".meta")
+        if os.path.isfile(meta_path):
+            try:
+                with open(meta_path, "r", encoding="utf-8") as mf:
+                    meta = json.load(mf)
+            except Exception:
+                meta = {}
+        try:
+            size = os.path.getsize(os.path.join(d, f))
+        except Exception:
+            size = 0
+        items.append({
+            "id": f,
+            "name": meta.get("original_name", f),
+            "plugin_hint": meta.get("plugin_hint", ""),
+            "size_bytes": size,
+            "created_at": meta.get("created_at", ""),
+        })
+    return {"success": True, "presets": items}
+
+
+@router.post("/upload")
+async def upload_preset(
+    file: UploadFile = File(...),
+    plugin_hint: Optional[str] = None,
+    current_user: dict = Depends(get_current_user),
+):
+    """Upload preset (.vstpreset / .fxp / .fxb / .dspreset) vào thư viện."""
+    enforce_password_changed(current_user)
+    filename = (file.filename or "preset.vstpreset").replace("\\", "/").split("/")[-1]
+    ext = os.path.splitext(filename)[1].lower()
+    if ext not in PRESET_EXTENSIONS:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Định dạng preset không hỗ trợ: {ext or '(không có đuôi)'} — hỗ trợ: {', '.join(PRESET_EXTENSIONS)}",
+        )
+    contents = await file.read()
+    if not contents:
+        raise HTTPException(status_code=400, detail="File rỗng")
+    d = preset_library_dir()
+    preset_id = uuid.uuid4().hex + ext
+    dest = os.path.join(d, preset_id)
+    try:
+        with open(dest, "wb") as fh:
+            fh.write(contents)
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Không lưu được preset: {e}")
+    meta = {
+        "original_name": filename,
+        "plugin_hint": plugin_hint or "",
+        "size_bytes": len(contents),
+        "created_at": time.strftime("%Y-%m-%d %H:%M:%S"),
+    }
+    try:
+        with open(os.path.join(d, os.path.splitext(preset_id)[0] + ".meta"), "w", encoding="utf-8") as mf:
+            json.dump(meta, mf, ensure_ascii=False, indent=2)
+    except Exception:
+        pass
+    return {"success": True, "preset_id": preset_id, **meta}
+
+
+@router.get("/{preset_id}/download")
+async def download_preset(preset_id: str):
+    path = _safe_preset_path(preset_id)
+    if not path:
+        raise HTTPException(status_code=404, detail="Preset không tồn tại")
+    return FileResponse(path, filename=preset_id, media_type="application/octet-stream")
+
+
+@router.delete("/{preset_id}")
+async def delete_preset(preset_id: str, current_user: dict = Depends(get_current_user)):
+    enforce_password_changed(current_user)
+    path = _safe_preset_path(preset_id)
+    if not path:
+        raise HTTPException(status_code=404, detail="Preset không tồn tại")
+    try:
+        os.remove(path)
+        mp = os.path.join(preset_library_dir(), os.path.splitext(preset_id)[0] + ".meta")
+        if os.path.isfile(mp):
+            os.remove(mp)
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Không xóa được preset: {e}")
+    return {"success": True, "preset_id": preset_id}
diff --git a/app/api/v1/system.py b/app/api/v1/system.py
new file mode 100644
index 0000000..d3fcc32
--- /dev/null
+++ b/app/api/v1/system.py
@@ -0,0 +1,51 @@
+# SonicForge System API — capabilities: frontend gọi 1 lần lúc boot để biết
+# môi trường (desktop Windows / docker headless) và bật/tắt tính năng tương ứng.
+from fastapi import APIRouter, HTTPException, Depends
+from pydantic import BaseModel
+from typing import Optional
+from app.core.runtime import capabilities, save_carla_path
+from app.api.v1.auth import get_current_user, enforce_password_changed
+
+router = APIRouter()
+
+
+@router.get("/capabilities")
+async def get_capabilities():
+    """Khả năng của môi trường hiện tại (public — cần trước khi đăng nhập).
+
+    - runtime: "desktop" (server + client cùng 1 máy Windows/macOS) |
+               "headless" (docker server + browser UI)
+    - features.carla_local: có Carla trên máy này → hiện nút "Mở trong Carla"
+    - features.preset_upload: luôn True (upload .vstpreset qua web UI)
+    - features.preview_mode: "quick_render" (pedalboard render clip ngắn —
+      âm thật giống export) | "wasm" (Preview Synth trong browser)
+    """
+    return capabilities()
+
+
+class CarlaPathRequest(BaseModel):
+    """Định vị Carla (bản portable zip không cài đặt/PATH). Chấp nhận đường
+    dẫn tới carla.exe HOẶC thư mục chứa carla.exe — resolve và lưu config."""
+    carla_path: str
+    carla_dir: Optional[str] = None  # tương thích ngược: tên cũ của carla_path
+
+
+@router.post("/carla-path")
+async def set_carla_path(req: CarlaPathRequest, current_user: dict = Depends(get_current_user)):
+    """Lưu vị trí carla.exe do user chọn (Plugin Manager → Định vị Carla...).
+
+    Cần thiết vì bản Carla Windows là bộ file zip portable — không có installer
+    cũng không dùng biến môi trường PATH, nên heuristic không tìm thấy."""
+    enforce_password_changed(current_user)
+    target = (req.carla_path or req.carla_dir or "").strip()
+    if not target:
+        raise HTTPException(status_code=400, detail="Thiếu đường dẫn Carla")
+    exe = save_carla_path(target)
+    if not exe:
+        raise HTTPException(
+            status_code=400,
+            detail="Không tìm thấy carla.exe trong đường dẫn đã chọn. Hãy chọn "
+                   "thư mục chứa carla.exe (bản portable giải nén) hoặc chính file carla.exe.",
+        )
+    return {"success": True, "carla_path": exe, **capabilities()}
+
diff --git a/app/config.py b/app/config.py
index 431027a..7f0f30a 100644
--- a/app/config.py
+++ b/app/config.py
@@ -17,6 +17,28 @@ def _storage_dir():
     return os.path.join(_app_dir(), "storage")
 
 
+def _default_vst_dir():
+    """Thư mục VST mặc định theo platform (env VST_DIR vẫn thắng).
+
+    Windows: thư mục VST3 chuẩn của hệ thống — user có thể thêm thư mục khác
+    qua Plugins Manager (plugin_dirs.json). Docker/Linux: mount qua compose."""
+    if os.name == "nt":
+        pf = os.environ.get("ProgramFiles", r"C:\Program Files")
+        return os.path.join(pf, "Common Files", "VST3")
+    if sys.platform == "darwin":
+        return "/Library/Audio/Plug-Ins/VST3"
+    return "/opt/daw_engine/vst3"
+
+
+def _default_soundfont_dir():
+    if os.name == "nt":
+        root = os.environ.get("APPDATA") or os.path.expanduser("~")
+        return os.path.join(root, "SonicForgeDAW", "soundfonts")
+    if sys.platform == "darwin":
+        return os.path.expanduser("~/Music/SonicForgeDAW/soundfonts")
+    return "/opt/daw_engine/soundfonts"
+
+
 class Settings:
     REDIS_URL: str = os.getenv("REDIS_URL", "redis://localhost:6379/0")
     CELERY_BROKER_URL: str = os.getenv("CELERY_BROKER_URL", "redis://localhost:6379/0")
@@ -30,8 +52,14 @@ class Settings:
     PROCESSED_DIR: str = os.path.join(STORAGE_DIR, "processed")
 
     # Plugin dirs — người dùng khai báo qua .env / docker-compose (Docker)
-    # hoặc qua Plugins Manager (Windows/macOS, lưu theo user).
-    VST_DIR: str = os.getenv("VST_DIR", "/opt/daw_engine/vst3")
-    SOUNDFONT_DIR: str = os.getenv("SOUNDFONT_DIR", "/opt/daw_engine/soundfonts")
+    # hoặc qua Plugins Manager (Windows/macOS, lưu theo user). Default theo
+    # platform (Windows: thư mục VST3 chuẩn; Linux: mount compose).
+    VST_DIR: str = os.getenv("VST_DIR", _default_vst_dir())
+    SOUNDFONT_DIR: str = os.getenv("SOUNDFONT_DIR", _default_soundfont_dir())
+
+    # Thư viện preset VST3 (.vstpreset) — cầu nối Carla → pedalboard.
+    # Nằm trong storage nên tự động nằm trong volume mount (docker) / thư mục
+    # storage (Windows desktop).
+    PRESET_DIR: str = os.path.join(STORAGE_DIR, "presets")
 
 settings = Settings()
diff --git a/app/core/render_engine.py b/app/core/render_engine.py
index 69d8df2..09d7fc2 100644
--- a/app/core/render_engine.py
+++ b/app/core/render_engine.py
@@ -10,6 +10,7 @@ from app.core.vst_engine import (
     DecentSamplerManager,
     HAS_PEDALBOARD,
     HAS_PYFLUIDSYNTH,
+    apply_preset_to_plugin,
 )
 
 logger = logging.getLogger(__name__)
@@ -223,6 +224,21 @@ class PythonRenderEngine:
                                     )
                             elif vst and HAS_PEDALBOARD:
                                 from pedalboard import Pedalboard
+                                # Preset bridge Carla → pedalboard: preset_id
+                                # (thư viện storage/presets), preset_path (file)
+                                # hoặc preset_data (base64 .vstpreset nhúng trong
+                                # project). Cùng sample rate → âm render = âm đã
+                                # chỉnh trong Carla.
+                                try:
+                                    se2 = track.get("synth_engine", {}) or {}
+                                    apply_preset_to_plugin(
+                                        vst,
+                                        preset_id=se2.get("preset_id") or track.get("preset_id"),
+                                        preset_path=se2.get("preset_path") or track.get("preset_path"),
+                                        preset_data_b64=se2.get("preset_data") or track.get("preset_data"),
+                                    )
+                                except Exception as e:
+                                    logger.warning("[RenderEngine] Preset apply failed: %s", e)
                                 midi_messages = PluginManager.midi_events_to_messages(
                                     midi_events, bpm, self.sample_rate,
                                     bank=soundfont_bank, program=soundfont_program
diff --git a/app/core/runtime.py b/app/core/runtime.py
new file mode 100644
index 0000000..1249676
--- /dev/null
+++ b/app/core/runtime.py
@@ -0,0 +1,398 @@
+# SonicForge Runtime Profile — phát hiện môi trường chạy (desktop Windows /
+# docker headless) và khả năng của máy, để app TỰ CHỌN cách xử lý:
+#   - Windows desktop (server + client cùng 1 máy): Carla local để preview +
+#     chỉnh preset → pedalboard render (Hướng A)
+#   - Docker / Linux headless (server + browser UI): soundfont + VSTi mở được
+#     từ storage mount; preset upload qua browser; không có GUI local.
+#
+# Ưu tiên: SF_RUNTIME env override > heuristic (platform + display + docker).
+# Module CHỈ dùng stdlib + app.config (không kéo pedalboard/numpy) để import
+# nhẹ và hoạt động trong mọi tiến trình (web/worker/celery).
+import os
+import sys
+import json
+import shutil
+import functools
+
+from app.config import settings
+
+SF_RUNTIME_ENV = "SF_RUNTIME"  # auto | desktop | headless
+SF_DOCKER_ENV = "SF_DOCKER"    # 1 = chạy trong container Docker
+CARLA_CONFIG_FILE = "carla_path.json"  # storage/carla_path.json — user định vị
+# Bản Carla portable (zip) có thể giải nén ở BẤT KỲ ĐÂU — PATH/Program Files
+# không đủ. User tự chọn thư mục chứa carla.exe qua Plugin Manager → lưu file
+# này (ưu tiên cao nhất khi detect), kèm tìm kiếm nông Downloads/Desktop.
+
+
+def _is_windows() -> bool:
+    return os.name == "nt"
+
+
+def _is_macos() -> bool:
+    return sys.platform == "darwin"
+
+
+def _is_linux() -> bool:
+    return not _is_windows() and not _is_macos()
+
+
+def _in_docker() -> bool:
+    if os.environ.get(SF_DOCKER_ENV) == "1":
+        return True
+    # Marker chuẩn của Docker (không tồn tại trên máy host thường)
+    try:
+        return os.path.exists("/.dockerenv")
+    except Exception:
+        return False
+
+
+def _has_display() -> bool:
+    """Có môi trường GUI hiển thị được hay không.
+
+    Windows/macOS luôn có (desktop). Linux cần biến DISPLAY (X11) — nếu chạy
+    Docker không có DISPLAY → headless."""
+    if _is_windows() or _is_macos():
+        return True
+    return bool(os.environ.get("DISPLAY"))
+
+
+def _tauri_bridge_ready() -> bool:
+    """App desktop Tauri viết marker file lúc setup (xem plugins.py
+    _pick_dir_via_tauri_bridge) — dùng để nhận diện bản desktop app."""
+    try:
+        root = os.environ.get("APPDATA") or os.path.expanduser("~")
+        return os.path.exists(os.path.join(root, "SonicForgeDAW", "ipc", "tauri_bridge_ready"))
+    except Exception:
+        return False
+
+
+def _carla_config_path() -> str:
+    return os.path.join(settings.STORAGE_DIR, CARLA_CONFIG_FILE)
+
+
+def get_configured_carla() -> str:
+    """Đường dẫn carla.exe do USER tự định vị (lưu trong storage/carla_path.json).
+
+    File lưu đường dẫn tới carla.exe (đã resolve) hoặc thư mục chứa — nếu là
+    thư mục, tìm carla.exe bên trong (độ sâu ≤ 2). Đây là cách bắt buộc có cho
+    bản Carla portable (zip) giải nén ở vị trí bất kỳ, không cài đặt/PATH."""
+    try:
+        with open(_carla_config_path(), "r", encoding="utf-8") as f:
+            data = json.load(f)
+    except Exception:
+        return ""
+    p = (data.get("carla_path") or "").strip()
+    if not p:
+        return ""
+    if os.path.isfile(p) and os.path.basename(p).lower() in ("carla.exe", "carla-single.exe", "carla"):
+        return p
+    if os.path.isdir(p):
+        try:
+            for root, dirs, files in os.walk(p):
+                depth = root[len(p):].count(os.sep)
+                if depth >= 2:
+                    dirs[:] = []
+                    continue
+                for f in files:
+                    if f.lower() == "carla.exe":
+                        return os.path.join(root, f)
+        except Exception:
+            pass
+    return ""
+
+
+def save_carla_path(path: str) -> str:
+    """Lưu vị trí Carla do user chọn (Plugin Manager → Định vị Carla...).
+
+    Chấp nhận: đường dẫn tới carla.exe, hoặc thư mục chứa carla.exe (portable
+    zip). Resolve về đường dẫn exe hợp lệ → ghi config → xóa cache detect.
+    Trả đường dẫn exe, hoặc '' nếu không hợp lệ."""
+    path = (path or "").strip().strip('"').strip()
+    exe = ""
+    if os.path.isfile(path) and os.path.basename(path).lower() in ("carla.exe", "carla-single.exe", "carla"):
+        exe = path
+    elif os.path.isdir(path):
+        try:
+            for root, dirs, files in os.walk(path):
+                depth = root[len(path):].count(os.sep)
+                if depth >= 2:
+                    dirs[:] = []
+                    continue
+                for f in files:
+                    if f.lower() == "carla.exe":
+                        exe = os.path.join(root, f)
+                        break
+                if exe:
+                    break
+        except Exception:
+            pass
+    if not exe:
+        return ""
+    try:
+        os.makedirs(settings.STORAGE_DIR, exist_ok=True)
+        with open(_carla_config_path(), "w", encoding="utf-8") as f:
+            json.dump({"carla_path": exe, "carla_exe": os.path.basename(exe)}, f, ensure_ascii=False, indent=2)
+    except Exception:
+        return ""
+    # Xóa cache detect/find_carla để capabilities phản ánh ngay
+    invalidate_carla_cache()
+    return exe
+
+
+def _carla_from_registry() -> str:
+    """Windows: Carla cài qua installer có thể ghi registry (best-effort)."""
+    if not _is_windows():
+        return ""
+    try:
+        import winreg
+        for hive, key in (
+            (winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Carla"),
+            (winreg.HKEY_CURRENT_USER, r"SOFTWARE\Carla"),
+            (winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\WOW6432Node\Carla"),
+        ):
+            try:
+                with winreg.OpenKey(hive, key) as k:
+                    val, _ = winreg.QueryValueEx(k, "InstallPath")
+                    p = os.path.join(str(val), "carla.exe")
+                    if os.path.isfile(p):
+                        return p
+            except Exception:
+                continue
+    except Exception:
+        pass
+    return ""
+
+
+def _find_carla_exe_bounded(base: str, max_depth: int = 3) -> str:
+    """Quét nông tìm carla.exe (bản portable giải nén thường nằm Downloads/
+    Desktop/Documents). Giới hạn độ sâu + bỏ qua thư mục lớn — KHÔNG quét
+    toàn ổ đĩa."""
+    if not base or not os.path.isdir(base):
+        return ""
+    skip = ("node_modules", ".cache", "AppData", ".git", "venv", ".venv",
+            "__pycache__", "$RECYCLE.BIN", "Windows", "Program Files",
+            "Program Files (x86)")
+    try:
+        for root, dirs, files in os.walk(base):
+            depth = root[len(base):].count(os.sep) if root != base else 0
+            if depth >= max_depth:
+                dirs[:] = []
+                continue
+            for f in files:
+                if f.lower() == "carla.exe":
+                    return os.path.join(root, f)
+            dirs[:] = [d for d in dirs if d not in skip and not d.startswith(".")]
+    except Exception:
+        pass
+    return ""
+
+
+def _carla_from_shallow_search() -> str:
+    """Windows: tìm carla.exe trong Downloads/Desktop/Documents/Home."""
+    if not _is_windows():
+        return ""
+    home = os.environ.get("USERPROFILE") or os.path.expanduser("~")
+    bases = []
+    for sub in ("Downloads", "Desktop", "Documents"):
+        bases.append(os.path.join(home, sub))
+    bases.append(home)
+    for base in bases:
+        hit = _find_carla_exe_bounded(base)
+        if hit:
+            return hit
+    return ""
+
+
+def _carla_candidates() -> list:
+    """Các vị trí Carla — theo thứ tự ưu tiên:
+    1) user định vị (config file — bản portable bắt buộc dùng cách này)
+    2) PATH (shutil.which)
+    3) registry (Windows, nếu cài qua installer)
+    4) thư mục cài đặt chuẩn (Program Files...)
+    5) quét nông Downloads/Desktop/Documents (Windows) / AppImage (Linux)"""
+    cands = []
+    configured = get_configured_carla()
+    if configured:
+        cands.append(configured)
+    try:
+        which = shutil.which("carla")
+        if which:
+            cands.append(which)
+    except Exception:
+        pass
+    reg = _carla_from_registry()
+    if reg:
+        cands.append(reg)
+    try:
+        if _is_windows():
+            pf = os.environ.get("ProgramFiles", r"C:\Program Files")
+            lpf = os.environ.get("ProgramFiles(x86)", r"C:\Program Files (x86)")
+            la = os.environ.get("LOCALAPPDATA", "")
+            for base in (pf, lpf, la):
+                for rel in ("Carla\\carla.exe", "Carla\\bin\\carla.exe", "Programs\\Carla\\carla.exe"):
+                    p = os.path.join(base, rel) if base else ""
+                    if p and os.path.isfile(p):
+                        cands.append(p)
+        elif _is_linux():
+            home = os.path.expanduser("~")
+            for p in ("/usr/bin/carla", "/usr/local/bin/carla", "/opt/carla/carla"):
+                if os.path.isfile(p):
+                    cands.append(p)
+            try:
+                for f in os.listdir(home):
+                    if f.lower().startswith("carla") and f.lower().endswith(".appimage"):
+                        cands.append(os.path.join(home, f))
+            except Exception:
+                pass
+        elif _is_macos():
+            for p in ("/Applications/Carla.app/Contents/MacOS/Carla", "/Applications/Carla.app/Contents/MacOS/carla"):
+                if os.path.isfile(p):
+                    cands.append(p)
+    except Exception:
+        pass
+    shallow = _carla_from_shallow_search()
+    if shallow:
+        cands.append(shallow)
+    # Dedup giữ thứ tự
+    seen, out = set(), []
+    for c in cands:
+        if c not in seen:
+            seen.add(c)
+            out.append(c)
+    return out
+
+
+@functools.lru_cache(maxsize=1)
+def find_carla() -> str:
+    """Đường dẫn Carla đầu tiên tìm thấy, hoặc '' nếu chưa có.
+
+    Lưu ý license: Carla GPL-2.0+ — app KHÔNG bundle/nhúng, chỉ spawn tiến
+    trình ngoài (user tự cài/giải nén) → không dính copyleft."""
+    for c in _carla_candidates():
+        return c
+    return ""
+
+
+def invalidate_carla_cache():
+    """Xóa cache detect/find_carla — gọi sau khi user định vị Carla mới."""
+    find_carla.cache_clear()
+    detect.cache_clear()
+
+
+def _detect_platform() -> str:
+    if _is_windows():
+        return "windows"
+    if _is_macos():
+        return "darwin"
+    return "linux"
+
+
+def _detect_runtime() -> str:
+    """auto → desktop nếu có GUI (Windows/macOS luôn; Linux cần DISPLAY và
+    không phải docker), ngược lại headless. SF_RUNTIME override thắng."""
+    override = (os.environ.get(SF_RUNTIME_ENV) or "auto").strip().lower()
+    if override in ("desktop", "headless"):
+        return override
+    if _is_windows() or _is_macos():
+        return "desktop"
+    if _in_docker() or not _has_display():
+        return "headless"
+    return "desktop"
+
+
+def default_vst_dirs() -> list:
+    """Thư mục VST mặc định theo platform (vẫn ưu tiên env VST_DIR).
+
+    Windows: thư mục chuẩn VST3 của hệ thống; user thường khai báo thêm qua
+    Plugins Manager (plugin_dirs.json)."""
+    if settings.VST_DIR and settings.VST_DIR != "/opt/daw_engine/vst3":
+        return [settings.VST_DIR]
+    if _is_windows():
+        pf = os.environ.get("ProgramFiles", r"C:\Program Files")
+        return [os.path.join(pf, "Common Files", "VST3"), os.path.join(pf, "VSTPlugins")]
+    if _is_macos():
+        return ["/Library/Audio/Plug-Ins/VST3", os.path.expanduser("~/Library/Audio/Plug-Ins/VST3")]
+    return ["/opt/daw_engine/vst3", os.path.expanduser("~/.vst3")]
+
+
+def default_soundfont_dirs() -> list:
+    if settings.SOUNDFONT_DIR and settings.SOUNDFONT_DIR != "/opt/daw_engine/soundfonts":
+        return [settings.SOUNDFONT_DIR]
+    if _is_windows():
+        root = os.environ.get("APPDATA") or os.path.expanduser("~")
+        return [os.path.join(root, "SonicForgeDAW", "soundfonts")]
+    if _is_macos():
+        return [os.path.expanduser("~/Music/SonicForgeDAW/soundfonts")]
+    return ["/opt/daw_engine/soundfonts", os.path.expanduser("~/.sf2")]
+
+
+@functools.lru_cache(maxsize=1)
+def detect() -> dict:
+    """Detect 1 lần (cache toàn cục) — kết quả bất biến trong 1 tiến trình."""
+    platform = _detect_platform()
+    runtime = _detect_runtime()
+    carla = find_carla() if runtime == "desktop" else ""
+    return {
+        "platform": platform,
+        "runtime": runtime,                 # "desktop" | "headless"
+        "docker": _in_docker(),
+        "has_display": _has_display(),
+        "tauri_bridge": _tauri_bridge_ready(),
+        "carla_path": carla,
+        "carla_local": bool(carla),         # chỉ có ý nghĩa khi runtime=desktop
+        "vst_render": _vst_render_available(),
+        "default_vst_dirs": default_vst_dirs(),
+        "default_soundfont_dirs": default_soundfont_dirs(),
+        "preset_dir": os.path.join(settings.STORAGE_DIR, "presets"),
+    }
+
+
+def _vst_render_available() -> bool:
+    """pedalboard có sẵn không (dùng find_spec — KHÔNG import pedalboard để
+    tránh kéo JUCE lib; giống pattern _module_available trong vst_engine)."""
+    import importlib.util
+    try:
+        return importlib.util.find_spec("pedalboard") is not None
+    except (ImportError, AttributeError, ValueError):
+        return False
+
+
+def capabilities() -> dict:
+    """Capabilities API — frontend gọi 1 lần lúc boot để bật/tắt tính năng."""
+    d = detect()
+    features = {
+        "carla_local": d["carla_local"],
+        "carla_path": d["carla_path"],
+        "preset_upload": True,              # cả 2 mode đều upload preset được
+        "vst_render": d["vst_render"],
+        "tauri_bridge": d["tauri_bridge"],
+        # preview VSTi: quick_render (pedalboard render clip ngắn — âm thật,
+        # giống export) là chuẩn cho cả 2 mode; không có realtime trong web UI.
+        "preview_mode": "quick_render" if d["vst_render"] else "wasm",
+    }
+    return {
+        "success": True,
+        "runtime": d["runtime"],
+        "platform": d["platform"],
+        "docker": d["docker"],
+        "features": features,
+        "default_dirs": {
+            "vst": d["default_vst_dirs"],
+            "soundfont": d["default_soundfont_dirs"],
+            "preset": d["preset_dir"],
+        },
+    }
+
+
+def is_desktop() -> bool:
+    return detect()["runtime"] == "desktop"
+
+
+def is_headless() -> bool:
+    return detect()["runtime"] == "headless"
+
+
+if __name__ == "__main__":
+    # python -m app.core.runtime  → in capabilities để kiểm tra detect
+    import json
+    print(json.dumps(capabilities(), ensure_ascii=False, indent=2))
diff --git a/app/core/vst_engine.py b/app/core/vst_engine.py
index 3d86d57..24392f8 100644
--- a/app/core/vst_engine.py
+++ b/app/core/vst_engine.py
@@ -408,3 +408,70 @@ class DecentSamplerManager:
             os.chdir(cwd_before)
 
         return plugin
+
+
+# ── Preset bridge (Carla ↔ pedalboard) ─────────────────────────────────────
+# Carla (chạy ngoài, user tự cài — GPL-2.0+ nên app KHÔNG bundle/nhúng) dùng
+# để mở native GUI VSTi + xuất file preset (.vstpreset từ nút Save của plugin).
+# File preset nằm trong thư viện storage/presets (upload qua web UI hoặc picker
+# local trên Windows) → render_engine tải qua apply_preset_to_plugin() khi render.
+PRESET_EXTENSIONS = (".vstpreset", ".fxp", ".fxb", ".dspreset")
+
+
+def preset_library_dir() -> str:
+    from app.config import settings as _st
+    d = os.path.join(_st.STORAGE_DIR, "presets")
+    try:
+        os.makedirs(d, exist_ok=True)
+    except Exception:
+        pass
+    return d
+
+
+def resolve_preset_path(preset_id_or_path: str) -> str:
+    """preset_id (tên file trong thư viện) hoặc đường dẫn tuyệt đối → path.
+
+    Trả '' nếu không tìm thấy. Chống path traversal: chỉ chấp nhận tên file
+    (không chứa separator) hoặc đường dẫn tuyệt đối tồn tại."""
+    if not preset_id_or_path:
+        return ""
+    p = preset_id_or_path
+    # Đường dẫn tuyệt đối / tương đối tồn tại → dùng thẳng
+    if os.path.isfile(p):
+        return p
+    # id dạng tên file trong thư viện (uuid + ext)
+    if os.path.basename(p) == p:
+        cand = os.path.join(preset_library_dir(), p)
+        if os.path.isfile(cand):
+            return cand
+        # Không có ext → quét theo prefix (uuid.idx → uuid.vstpreset)
+        try:
+            for f in os.listdir(preset_library_dir()):
+                if f.lower().endswith(PRESET_EXTENSIONS) and f.startswith(p + "."):
+                    return os.path.join(preset_library_dir(), f)
+        except Exception:
+            pass
+    return ""
+
+
+def apply_preset_to_plugin(plugin, preset_id=None, preset_path=None, preset_data_b64=None) -> bool:
+    """Gán preset lên plugin pedalboard: bytes nhúng (base64 .vstpreset) ưu
+    tiên, sau đó preset_id (thư viện), sau preset_path (file). Trả True nếu
+    áp dụng được; KHÔNG raise (render engine chỉ log warning)."""
+    if plugin is None:
+        return False
+    try:
+        if preset_data_b64:
+            import base64
+            raw = base64.b64decode(preset_data_b64)
+            if hasattr(plugin, "preset_data"):
+                plugin.preset_data = raw  # bytes dạng .vstpreset (VST3)
+                return True
+        p = resolve_preset_path(preset_id or "") or resolve_preset_path(preset_path or "")
+        if p and hasattr(plugin, "load_preset"):
+            plugin.load_preset(p)  # .vstpreset (VST3) / .dspreset (DecentSampler)
+            return True
+    except Exception:
+        return False
+    return False
+
diff --git a/app/main.py b/app/main.py
index 45e2e91..82d165d 100644
--- a/app/main.py
+++ b/app/main.py
@@ -18,6 +18,8 @@ from app.api.v1.ai_proxy import router as ai_proxy_router
 from app.api.v1.ai_presets import router as ai_presets_router
 from app.api.v1.plugins import router as plugins_router
 from app.api.v1.media import router as media_router
+from app.api.v1.system import router as system_router
+from app.api.v1.presets import router as presets_router
 from app.core.auth import seed_admin
 from app.core.soundfont_scanner import SoundFontAutoScanner
 
@@ -93,6 +95,8 @@ app.include_router(ai_proxy_router, prefix="/api/v1/ai", tags=["ai"])
 app.include_router(ai_presets_router, prefix="/api/v1/ai", tags=["ai"])
 app.include_router(plugins_router, prefix="/api/v1/plugins", tags=["plugins"])
 app.include_router(media_router, prefix="/api/v1/media", tags=["media"])
+app.include_router(system_router, prefix="/api/v1/system", tags=["system"])
+app.include_router(presets_router, prefix="/api/v1/presets", tags=["presets"])
 
 
 @app.get("/health")
diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index 1ca94cd..45973cb 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -5279,7 +5279,7 @@ const AIConfigModal = ({
   }, loading ? 'Đang lưu...' : 'Lưu Cấu Hình AI'))))));
 };
 
-const PluginManagerModal = ({ isOpen, onClose, pluginsData }) => {
+const PluginManagerModal = ({ isOpen, onClose, pluginsData, onInsertInstrument }) => {
   if (!isOpen) return null;
   const [localData, setLocalData] = React.useState(pluginsData);
   const [sfUploadStatus, setSfUploadStatus] = React.useState('');
@@ -5288,6 +5288,12 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData }) => {
   const [pmScanning, setPmScanning] = React.useState(false);
   const [pmScanResult, setPmScanResult] = React.useState('');
   const [pmScanData, setPmScanData] = React.useState(null); // { vst_found, soundfonts }
+  // Instrument bên trong mỗi soundfont (expand) — "Chèn vào Synth" qua onInsertInstrument
+  const [pmSfExpanded, setPmSfExpanded] = React.useState({});
+  const [pmSfInstruments, setPmSfInstruments] = React.useState({});
+  const [pmSfLoading, setPmSfLoading] = React.useState({});
+  // Force re-render sau khi định vị Carla (capabilities đổi)
+  const [pmCarlaVersion, setPmCarlaVersion] = React.useState(0);
   React.useEffect(() => {
     if (isOpen) {
       window.SonicAPI.listPlugins()
@@ -5365,6 +5371,51 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData }) => {
   const removePluginDir = (dir) => {
     setPmDirs(prev => prev.filter(d => d !== dir));
   };
+  // Expand 1 soundfont → đọc danh sách instrument (bank/program/name) bên trong
+  // qua API soundfont-instruments/{id} → hiển thị nút "Chèn vào Synth".
+  const toggleSfInstruments = async (sf) => {
+    const baseId = String(sf.id || '').replace('sf_', '');
+    setPmSfExpanded(prev => ({ ...prev, [baseId]: !prev[baseId] }));
+    if (!pmSfInstruments[baseId] && !pmSfLoading[baseId]) {
+      setPmSfLoading(prev => ({ ...prev, [baseId]: true }));
+      try {
+        const r = await window.SonicAPI.listSoundfontInstruments(baseId);
+        setPmSfInstruments(prev => ({ ...prev, [baseId]: (r && r.presets) || [] }));
+      } catch (e) {
+        setPmSfInstruments(prev => ({ ...prev, [baseId]: [] }));
+      } finally {
+        setPmSfLoading(prev => ({ ...prev, [baseId]: false }));
+      }
+    }
+  };
+  // Định vị Carla.exe — bản Windows là zip portable: KHÔNG cài đặt, KHÔNG dùng
+  // biến môi trường PATH nên heuristic không tìm thấy → user tự chọn thư mục
+  // chứa carla.exe (folder picker native) → lưu config phía server.
+  const locateCarla = async () => {
+    try {
+      let picked = null;
+      try {
+        const d = await window.SonicAPI.pickPluginDir();
+        if (d && typeof d.path === 'string' && d.path) picked = d.path;
+      } catch (e) { /* fallthrough */ }
+      if (!picked && window.__TAURI__ && window.__TAURI__.core && window.__TAURI__.core.invoke) {
+        try {
+          const sel = await window.__TAURI__.core.invoke('plugin:dialog|open', { options: { directory: true, multiple: false } });
+          if (typeof sel === 'string' && sel) picked = sel;
+        } catch (e) { /* fallthrough */ }
+      }
+      if (!picked) { showToast('Không mở được hộp thoại chọn thư mục', 'error'); return; }
+      const r = await window.SonicAPI.setCarlaPath(picked);
+      if (r && r.success && r.carla_path) {
+        window.SonicRuntime.capabilities = r;
+        document.documentElement.dataset.carla = r.features && r.features.carla_local ? '1' : '0';
+        setPmCarlaVersion(v => v + 1);
+        showToast('Đã định vị Carla: ' + r.carla_path, 'success');
+      } else {
+        showToast('Không tìm thấy carla.exe trong thư mục đã chọn', 'error');
+      }
+    } catch (err) { showToast('Lỗi định vị Carla: ' + (err.message || err), 'error'); }
+  };
   // Lưu dirs (user override) + scan cả 2 thư mục → refresh list + catalog.
   const saveAndScanDirs = async () => {
     setPmScanning(true);
@@ -5545,28 +5596,78 @@ const PluginManagerModal = ({ isOpen, onClose, pluginsData }) => {
             ) :
             (localData.soundfonts?.length === 0 ?
               React.createElement('div', { className: 'flex items-center justify-center h-32 text-zinc-500 text-xs' }, 'No SoundFonts found. Upload one below.') :
-              localData.soundfonts.map((sf, i) =>
-                React.createElement('div', {
+              localData.soundfonts.map((sf, i) => {
+                const baseId = String(sf.id || '').replace('sf_', '');
+                const expanded = !!pmSfExpanded[baseId];
+                const insts = pmSfInstruments[baseId] || [];
+                const loading = !!pmSfLoading[baseId];
+                return React.createElement('div', {
                   key: i,
-                  className: 'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-amber-800/50 transition group'
+                  className: 'bg-[#252525] rounded-lg border border-[#333] hover:border-amber-800/50 transition group'
                 },
-                  React.createElement('div', { className: 'flex items-center gap-3' },
-                    React.createElement('div', { className: 'w-8 h-8 rounded bg-amber-900/30 flex items-center justify-center' },
-                      React.createElement('i', { 'data-lucide': 'music', className: 'w-4 h-4 text-amber-400' })
+                  React.createElement('div', {
+                    className: 'flex items-center justify-between px-4 py-3 cursor-pointer',
+                    onClick: () => toggleSfInstruments(sf)
+                  },
+                    React.createElement('div', { className: 'flex items-center gap-3' },
+                      React.createElement('div', { className: 'w-8 h-8 rounded bg-amber-900/30 flex items-center justify-center' },
+                        React.createElement('i', { 'data-lucide': 'music', className: 'w-4 h-4 text-amber-400' })
+                      ),
+                      React.createElement('div', null,
+                        React.createElement('div', { className: 'text-xs font-semibold text-slate-200' }, sf.display || sf.name || sf.id),
+                        React.createElement('div', { className: 'text-[10px] text-zinc-500' }, (sf.file || sf.name) + (insts.length ? ' — ' + insts.length + ' instruments' : ''))
+                      )
                     ),
-                    React.createElement('div', null,
-                      React.createElement('div', { className: 'text-xs font-semibold text-slate-200' }, sf.display || sf.name || sf.id),
-                      React.createElement('div', { className: 'text-[10px] text-zinc-500' }, sf.file || sf.name)
+                    React.createElement('div', { className: 'flex items-center gap-2' },
+                      React.createElement('span', { className: 'text-[10px] text-zinc-500' }, expanded ? '▾' : '▸'),
+                      React.createElement('button', {
+                        onClick: (e) => { e.stopPropagation(); setSfToDelete(sf); },
+                        className: 'text-[10px] text-zinc-500 hover:text-red-400 opacity-0 group-hover:opacity-100 transition px-2 py-1'
+                      }, 'Delete')
                     )
                   ),
-                  React.createElement('div', { className: 'flex items-center gap-2' },
-                    React.createElement('button', {
-                      onClick: () => setSfToDelete(sf),
-                      className: 'text-[10px] text-zinc-500 hover:text-red-400 opacity-0 group-hover:opacity-100 transition px-2 py-1'
-                    }, 'Delete')
+                  expanded && React.createElement('div', { className: 'border-t border-[#333] px-3 py-1 max-h-40 overflow-y-auto' },
+                    loading ?
+                      React.createElement('p', { className: 'text-[10px] text-zinc-500 italic py-1' }, 'Đang đọc instruments...') :
+                      insts.length === 0 ?
+                        React.createElement('p', { className: 'text-[10px] text-zinc-500 italic py-1' }, 'Không có instrument (SF3 cần chuyển đổi trước)') :
+                        insts.map((p, pi) => React.createElement('div', { key: 'si_' + pi, className: 'flex items-center gap-2 py-1 text-[11px]' },
+                          React.createElement('span', { className: 'text-zinc-500 font-mono w-24 shrink-0 text-[9px]' }, 'B' + (p.bank || 0) + ' P' + (p.program || 0)),
+                          React.createElement('span', { className: 'flex-1 truncate text-zinc-300' }, p.name || ('Program ' + p.program)),
+                          React.createElement('button', {
+                            onClick: () => onInsertInstrument && onInsertInstrument({
+                              instrumentId: 'sf_' + baseId,
+                              bank: p.bank || 0,
+                              program: p.program || 0,
+                              name: p.name || ('Program ' + p.program),
+                              displayName: (sf.display || sf.name || sf.id) + ' — ' + (p.name || ('Program ' + p.program))
+                            }),
+                            className: 'text-[10px] bg-amber-800 hover:bg-amber-700 text-white px-2 py-0.5 rounded transition shrink-0'
+                          }, 'Chèn vào Synth')
+                        ))
                   )
-              )
-            ))
+                );
+              })
+            )
+          ),
+          // ── 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')
+            )
           ),
           // Plugin directories section (folder picker + save + scan)
           React.createElement('div', {
@@ -14279,6 +14380,11 @@ 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>
@@ -15520,6 +15626,27 @@ const App = () => {
     setAiPrompt(newText);
   };
 
+  // Gán preset VST3 (.vstpreset từ thư viện storage/presets — cầu nối
+  // Carla → pedalboard) vào track: preset_id nằm trong synth_engine → render
+  // engine tải qua load_preset khi render → âm render = âm đã chỉnh trong Carla.
+  const setTrackPreset = (trackId, presetId) => {
+    if (!trackId || !presetId) return;
+    var mt = activeTracksRef.current || tracks;
+    var cur = null;
+    for (var ci = 0; ci < mt.length; ci++) { if (mt[ci].id === trackId) { cur = mt[ci]; break; } }
+    if (!cur) return;
+    var se = cur.synth_engine || {};
+    if (!se.plugin_id || String(se.type || '').indexOf('vst') === -1) {
+      showToast('Chọn VST instrument trước khi gán preset', 'warning');
+      return;
+    }
+    updateActiveTracks(prev => prev.map(t => t.id === trackId ? { ...t, synth_engine: { ...(t.synth_engine || {}), preset_id: presetId } } : t));
+    setInstrumentDropdownTrackId(null);
+    setInstrumentDropdownBtnRect(null);
+    var p = ((window.SonicRuntime && window.SonicRuntime.presets) || []).find(function (x) { return x.id === presetId; });
+    showToast('Đã gán preset: ' + ((p && p.name) || presetId), 'success');
+  };
+
   const setTrackInstrumentWithUndo = (trackId, instrumentId, displayName, bankNumber, programNumber) => {
     const track = activeTracks.find(t => t.id === trackId);
     if (!track) return;
@@ -29802,7 +29929,16 @@ STRICT CONSTRAINTS:
   }), /*#__PURE__*/React.createElement(PluginManagerModal, {
     isOpen: pluginManagerModalOpen,
     onClose: () => setPluginManagerModalOpen(false),
-    pluginsData: pluginsData
+    pluginsData: pluginsData,
+    onInsertInstrument: (inst) => {
+      // Chèn instrument (soundfont bank/program) vào track đang chọn — nút Synth
+      const tid = selectedTrackId || (activeTracks && activeTracks[0] && activeTracks[0].id);
+      if (tid && inst && inst.instrumentId) {
+        setTrackInstrumentWithProgram(tid, inst.instrumentId, inst.program, inst.displayName || inst.name, inst.bank);
+        showToast('Đã chèn nhạc cụ: ' + (inst.displayName || inst.name), 'success');
+      }
+      setPluginManagerModalOpen(false);
+    }
   }), /*#__PURE__*/React.createElement(AIPresetModal, {
     isOpen: aiPresetModalOpen,
     onClose: () => { setAiPresetModalOpen(false); setAiPresetVersion(v => v + 1); }
@@ -29943,6 +30079,14 @@ 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,
@@ -29950,11 +30094,46 @@ STRICT CONSTRAINTS:
       className: "w-full text-left px-3 py-1.5 text-xs bg-zinc-800 hover:bg-amber-800 text-zinc-200 flex items-center justify-between"
     }, /*#__PURE__*/React.createElement("span", { className: "truncate" }, sf.display || sf.name || sf.id), /*#__PURE__*/React.createElement("span", { className: "text-[10px] text-amber-400 shrink-0 ml-1" }, "SF"))),
     filteredInstruments.vst.length > 0 && /*#__PURE__*/React.createElement("div", { className: "text-[10px] text-zinc-500 px-3 py-1 mt-1 uppercase font-bold" }, "VST Instruments"),
-    filteredInstruments.vst.map((v, i) => /*#__PURE__*/React.createElement("button", {
+    filteredInstruments.vst.map((v, i) => /*#__PURE__*/React.createElement("div", {
       key: "vstd_" + i,
-      onClick: () => { setInstrumentDropdownTrackId(null); setInstrumentDropdownBtnRect(null); setTrackInstrumentWithUndo(instrumentDropdownTrackId, v.id, v.name || v.id); },
-      className: "w-full 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"))),
+      className: "flex items-stretch"
+    },
+      /*#__PURE__*/React.createElement("button", {
+        onClick: () => { setInstrumentDropdownTrackId(null); setInstrumentDropdownBtnRect(null); setTrackInstrumentWithUndo(instrumentDropdownTrackId, v.id, v.name || v.id); },
+        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", {
+      key: "psd_" + i,
+      onClick: () => setTrackPreset(instrumentDropdownTrackId, p.id),
+      className: "w-full text-left px-3 py-1 text-xs bg-zinc-800 hover:bg-emerald-800 text-zinc-300 flex items-center justify-between"
+    }, /*#__PURE__*/React.createElement("span", { className: "truncate" }, p.name || p.id), /*#__PURE__*/React.createElement("span", { className: "text-[10px] text-emerald-400 shrink-0 ml-1" }, "PRESET"))),
+    /*#__PURE__*/React.createElement("button", {
+      onClick: () => {
+        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;
+          window.SonicAPI.uploadPreset(f).then(function (r) {
+            if (r && r.success) {
+              if (window.SonicRuntime) window.SonicRuntime.refreshPresets();
+              showToast('Đã upload preset: ' + (r.original_name || r.name || ''), 'success');
+            } else { showToast('Upload preset thất bại', 'error'); }
+          }).catch(function (err) { showToast('Upload lỗi: ' + (err.message || err), 'error'); });
+        };
+        inp.click();
+      },
+      className: "w-full text-left px-3 py-1 text-xs bg-zinc-800 hover:bg-teal-800 text-teal-300 border-t border-zinc-700",
+      title: "Upload preset .vstpreset xuất từ Carla (native GUI)"
+    }, "\u2B06 Upload preset (t\u1EEB Carla...)"),
     (!filteredInstruments.soundfonts.length && !filteredInstruments.vst.length) && /*#__PURE__*/React.createElement("p", { className: "text-xs text-zinc-500 py-4 text-center" }, "Kh\u00f4ng t\u00ecm th\u1ea5y nh\u1ea1c c\u1ee5 n\u00e0o")
   )));
 };
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 9ca13d2..072b688 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -362,8 +362,10 @@ const GraphEditorCanvas=({buffer,zoom,timelineWidth,volumeNodes,panningNodes,fad
 // username/mật khẩu; sau khi đã đổi → ẩn vĩnh viễn.
 useEffect(()=>{if(!isOpen)return;if(window.SonicAPI&&window.SonicAPI.apiRequest){window.SonicAPI.apiRequest('/api/v1/auth/first-time',{method:'GET'}).then(function(d){setFirstTime(!!(d&&d.first_time));})// Fail-closed: endpoint lỗi/404 (backend chưa restart) → ẨN gợi ý
 // (không hiện — user đã yêu cầu bỏ gợi ý sau lần đầu).
-.catch(function(){setFirstTime(false);});}else{setFirstTime(false);}},[isOpen]);const handleSubmit=async e=>{e.preventDefault();setError('');setLoading(true);try{if(activeTab==='login'){const targetUsername=username.trim()||'admin';const targetPwd=password.trim()||'admin123';const res=await window.SonicAPI.login(targetUsername,targetPwd);localStorage.setItem('sonic_token',res.access_token);localStorage.setItem('sonic_user',JSON.stringify(res.user));if(res.user&&res.user.must_change_password){setOldPassword(targetPwd);}onSuccess(res.user,res.access_token);}else if(activeTab==='register'){const res=await window.SonicAPI.register(username.trim(),email.trim(),password.trim());localStorage.setItem('sonic_token',res.access_token);localStorage.setItem('sonic_user',JSON.stringify(res.user));onSuccess(res.user,res.access_token);}else if(activeTab==='force_change'){const res=await window.SonicAPI.changePassword(oldPassword.trim(),newPassword.trim());localStorage.setItem('sonic_token',res.access_token);const user=JSON.parse(localStorage.getItem('sonic_user')||'{}');user.must_change_password=false;localStorage.setItem('sonic_user',JSON.stringify(user));onSuccess(user,res.access_token);}}catch(err){setError(err.message||(activeTab==='login'?'Tài khoản hoặc mật khẩu không chính xác. 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null;const[localData,setLocalData]=React.useState(pluginsData);const[sfUploadStatus,setSfUploadStatus]=React.useState('');const[sfToDelete,setSfToDelete]=React.useState(null);const[pmDirs,setPmDirs]=React.useState([]);const[pmScanning,setPmScanning]=React.useState(false);const[pmScanResult,setPmScanResult]=React.useState('');const[pmScanData,setPmScanData]=React.useState(null);// { vst_found, soundfonts }
+// Instrument bên trong mỗi soundfont (expand) — "Chèn vào Synth" qua onInsertInstrument
+const[pmSfExpanded,setPmSfExpanded]=React.useState({});const[pmSfInstruments,setPmSfInstruments]=React.useState({});const[pmSfLoading,setPmSfLoading]=React.useState({});// Force re-render sau khi định vị Carla (capabilities đổi)
+const[pmCarlaVersion,setPmCarlaVersion]=React.useState(0);React.useEffect(()=>{if(isOpen){window.SonicAPI.listPlugins().then(data=>setLocalData(data)).catch(()=>setLocalData({vst_instruments:[],soundfonts:[]}));window.SonicAPI.getPluginDirs().then(d=>setPmDirs(d.plugin_dirs||[])).catch(()=>{});setTimeout(()=>{try{window.lucide.createIcons();}catch(e){}},50);}},[isOpen]);// Folder picker:
 // 1) Neu page duoc Tauri serve (__TAURI__ co) -> dialog plugin invoke.
 // 2) Binh thuong UI chay tren http://127.0.0.1:8000 (engine) -> __TAURI__
 //    KHONG co (Tauri chi inject vao trang no serve; window.prompt cung
@@ -377,14 +379,20 @@ const openPluginPicker=async()=>{setPmPicker({path:null,dirs:null,parent:null,ro
 try{const d=await window.SonicAPI.pickPluginDir();if(d&&typeof d.path==='string'&&d.path){addDir(d.path);return;}}catch(e){/* fallthrough */}// 2) Tauri dialog trực tiếp (chỉ khi page được Tauri serve)
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 await openPluginPicker();return;}catch(e){// 4) Cuối cùng: prompt nhập tay (browser thuần, không phải WebView2)
-try{const manual=window.prompt('Nhập đường dẫn thư mục plugin (VST / SoundFont):');if(manual&&manual.trim())addDir(manual.trim());}catch(e2){showToast('Browse failed: '+(e.message||e),'error');}}};const removePluginDir=dir=>{setPmDirs(prev=>prev.filter(d=>d!==dir));};// Lưu dirs (user override) + scan cả 2 thư mục → refresh list + catalog.
+try{const manual=window.prompt('Nhập đường dẫn thư mục plugin (VST / SoundFont):');if(manual&&manual.trim())addDir(manual.trim());}catch(e2){showToast('Browse failed: '+(e.message||e),'error');}}};const removePluginDir=dir=>{setPmDirs(prev=>prev.filter(d=>d!==dir));};// Expand 1 soundfont → đọc danh sách instrument (bank/program/name) bên trong
+// qua API soundfont-instruments/{id} → hiển thị nút "Chèn vào Synth".
+const toggleSfInstruments=async sf=>{const baseId=String(sf.id||'').replace('sf_','');setPmSfExpanded(prev=>({...prev,[baseId]:!prev[baseId]}));if(!pmSfInstruments[baseId]&&!pmSfLoading[baseId]){setPmSfLoading(prev=>({...prev,[baseId]:true}));try{const r=await window.SonicAPI.listSoundfontInstruments(baseId);setPmSfInstruments(prev=>({...prev,[baseId]:r&&r.presets||[]}));}catch(e){setPmSfInstruments(prev=>({...prev,[baseId]:[]}));}finally{setPmSfLoading(prev=>({...prev,[baseId]:false}));}}};// Định vị Carla.exe — bản Windows là zip portable: KHÔNG cài đặt, KHÔNG dùng
+// biến môi trường PATH nên heuristic không tìm thấy → user tự chọn thư mục
+// chứa carla.exe (folder picker native) → lưu config phía server.
+const locateCarla=async()=>{try{let picked=null;try{const d=await window.SonicAPI.pickPluginDir();if(d&&typeof d.path==='string'&&d.path)picked=d.path;}catch(e){/* fallthrough */}if(!picked&&window.__TAURI__&&window.__TAURI__.core&&window.__TAURI__.core.invoke){try{const sel=await window.__TAURI__.core.invoke('plugin:dialog|open',{options:{directory:true,multiple:false}});if(typeof sel==='string'&&sel)picked=sel;}catch(e){/* fallthrough */}}if(!picked){showToast('Không mở được hộp thoại chọn thư mục','error');return;}const r=await window.SonicAPI.setCarlaPath(picked);if(r&&r.success&&r.carla_path){window.SonicRuntime.capabilities=r;document.documentElement.dataset.carla=r.features&&r.features.carla_local?'1':'0';setPmCarlaVersion(v=>v+1);showToast('Đã định vị Carla: '+r.carla_path,'success');}else{showToast('Không tìm thấy carla.exe trong thư mục đã chọn','error');}}catch(err){showToast('Lỗi định vị Carla: '+(err.message||err),'error');}};// Lưu dirs (user override) + scan cả 2 thư mục → refresh list + catalog.
 const saveAndScanDirs=async()=>{setPmScanning(true);setPmScanResult('');setPmScanData(null);try{await window.SonicAPI.savePluginDirs({plugin_dirs:pmDirs});const scan=await window.SonicAPI.scanPluginDirs();setPmScanData({vst_found:scan.vst_found||[],soundfonts:scan.soundfonts||[]});const data=await window.SonicAPI.listPlugins();setLocalData(data);try{const cat=await window.SonicAPI.getSoundfontCatalog();window.__soundfontCatalog=cat;}catch(_){}setPmScanResult(`VST: ${scan.vst_count||0} | SoundFonts: ${scan.soundfont_count||0}`);showToast(`Scan xong: ${scan.vst_count||0} VST, ${scan.soundfont_count||0} SoundFonts.`,'success');}catch(err){setPmScanResult('Scan failed: '+(err.message||err));showToast('Scan failed: '+(err.message||err),'error');}finally{setPmScanning(false);}};const handleUploadSF=async e=>{const file=e.target.files?.[0];if(!file)return;setSfUploadStatus('Uploading...');try{const result=await window.SonicAPI.uploadSoundFont(file);setSfUploadStatus('Uploaded: '+result.name);// Refresh plugin list and catalog
 const data=await window.SonicAPI.listPlugins();setLocalData(data);try{const cat=await window.SonicAPI.getSoundfontCatalog();window.__soundfontCatalog=cat;}catch(_){}}catch(err){setSfUploadStatus('Error: '+err.message);}};const[pmTab,setPmTab]=React.useState('soundfont');return React.createElement('div',{className:'fixed inset-0 z-50 flex items-center justify-center bg-black/70 backdrop-blur-sm',onClick:onClose},React.createElement('div',{className:'bg-[#1e1e1e] border border-[#383838] rounded-xl shadow-2xl w-full max-w-3xl p-0 text-slate-200 overflow-hidden flex flex-col relative',style:{maxHeight:'80vh'},onClick:e=>e.stopPropagation()},// ── In-app folder picker (Plugin Directories) ─────────────────────
 pmPicker&&React.createElement('div',{className:'absolute inset-0 z-10 bg-[#171717]/97 flex flex-col',style:{padding:16}},React.createElement('div',{className:'flex items-center justify-between mb-2'},React.createElement('div',{className:'text-xs font-bold text-violet-300 uppercase'},'Chọn thư mục plugin'),React.createElement('button',{onClick:()=>setPmPicker(null),className:'text-zinc-500 hover:text-zinc-200 transition'},React.createElement('i',{'data-lucide':'x',className:'w-4 h-4'}))),React.createElement('div',{className:'flex items-center gap-2 mb-2'},React.createElement('button',{onClick:()=>{if(pmPicker.parent)browsePluginDir(pmPicker.parent);},disabled:!pmPicker.parent,className:'px-2 py-1 bg-zinc-800 hover:bg-zinc-700 rounded text-[11px] text-zinc-300 disabled:opacity-30 shrink-0'},'Lên'),React.createElement('div',{className:'flex-1 text-[11px] text-zinc-400 font-mono truncate',title:pmPicker.path||''},pmPicker.path||(pmPicker.loading?'Đang tải...':'My Computer'))),pmPicker.loading?React.createElement('div',{className:'flex-1 flex items-center justify-center text-zinc-500 text-xs'},'Đang tải...'):pmPicker.dirs?pmPicker.dirs.length===0?React.createElement('div',{className:'flex-1 flex items-center justify-center text-zinc-600 text-xs italic'},'Thư mục trống'):React.createElement('div',{className:'flex-1 overflow-y-auto space-y-1'},pmPicker.dirs.map((d,i)=>React.createElement('div',{key:'pd_'+i,className:'flex items-center gap-2 px-2 py-1.5 rounded hover:bg-violet-900/30 cursor-pointer group',onClick:()=>browsePluginDir(d.path)},React.createElement('i',{'data-lucide':'folder',className:'w-3.5 h-3.5 text-amber-500/80 shrink-0'}),React.createElement('span',{className:'flex-1 text-[11px] text-zinc-300 truncate'},d.name),React.createElement('i',{'data-lucide':'chevron-right',className:'w-3 h-3 text-zinc-600 group-hover:text-violet-400 shrink-0'})))):pmPicker.roots?pmPicker.roots.length===0?React.createElement('div',{className:'flex-1 flex items-center justify-center text-zinc-600 text-xs'},'Không tìm thấy ổ đĩa'):React.createElement('div',{className:'flex-1 overflow-y-auto space-y-1'},pmPicker.roots.map((r,i)=>React.createElement('div',{key:'pr_'+i,className:'flex items-center gap-2 px-2 py-1.5 rounded hover:bg-violet-900/30 cursor-pointer',onClick:()=>browsePluginDir(r.path)},React.createElement('i',{'data-lucide':'hard-drive',className:'w-3.5 h-3.5 text-cyan-500/80 shrink-0'}),React.createElement('span',{className:'flex-1 text-[11px] text-zinc-300'},r.name||r.path)))):null,React.createElement('div',{className:'flex items-center justify-end gap-2 mt-2 pt-2 border-t border-[#383838]'},React.createElement('button',{onClick:()=>setPmPicker(null),className:'px-3 py-1.5 bg-zinc-800 hover:bg-zinc-700 text-white text-xs rounded'},'Hủy'),React.createElement('button',{onClick:confirmPluginDir,disabled:!pmPicker.path,className:'px-3 py-1.5 bg-violet-700 hover:bg-violet-600 text-white text-xs font-semibold rounded disabled:opacity-30'},'Chọn thư mục này'))),// Header
 React.createElement('div',{className:'flex items-center justify-between px-5 py-3 bg-[#252525] border-b border-[#383838]'},React.createElement('h3',{className:'text-base font-bold text-cyan-400 flex items-center gap-2'},React.createElement('i',{'data-lucide':'zap',className:'w-4 h-4'}),'Plugin Manager (SoundFont / VSTi)'),React.createElement('button',{onClick:onClose,className:'text-zinc-500 hover:text-zinc-200 transition'},React.createElement('i',{'data-lucide':'x',className:'w-4 h-4'}))),// Left-right body
 React.createElement('div',{className:'flex flex-1 overflow-hidden',style:{minHeight:'300px'}},// Left sidebar
 React.createElement('div',{className:'w-40 shrink-0 border-r border-[#383838] bg-[#1a1a1a] p-3 flex flex-col gap-2'},['vst','soundfont'].map(tab=>React.createElement('button',{key:tab,onClick:()=>setPmTab(tab),className:`w-full py-2 text-xs font-bold rounded transition border ${pmTab===tab?tab==='vst'?'bg-violet-900 border-violet-700 text-violet-200':'bg-amber-900 border-amber-700 text-amber-200':'bg-zinc-800 border-transparent text-zinc-400 hover:text-zinc-200 hover:bg-zinc-700'} flex items-center gap-2 px-3`},React.createElement('i',{'data-lucide':tab==='vst'?'cpu':'music',className:'w-3.5 h-3.5'}),tab==='vst'?'VST Instruments':'SoundFonts'))),// Right content
-React.createElement('div',{className:'flex-1 overflow-y-auto p-4 bg-[#1e1e1e]'},!localData?React.createElement('div',{className:'flex items-center justify-center h-full text-zinc-500 text-xs'},'Loading...'):React.createElement('div',{className:'space-y-2'},pmTab==='vst'?localData.vst_instruments?.length===0?React.createElement('div',{className:'flex items-center justify-center h-32 text-zinc-500 text-xs'},'No VST instruments found on server.'):localData.vst_instruments.map((v,i)=>React.createElement('div',{key:i,className:'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-violet-800/50 transition'},React.createElement('div',{className:'flex items-center gap-3'},React.createElement('div',{className:'w-8 h-8 rounded bg-violet-900/30 flex items-center justify-center'},React.createElement('i',{'data-lucide':'cpu',className:'w-4 h-4 text-violet-400'})),React.createElement('div',null,React.createElement('div',{className:'text-xs font-semibold text-slate-200'},v.name||v.id),React.createElement('div',{className:'text-[10px] text-zinc-500'},v.type||'VST3'))),React.createElement('span',{className:'text-[10px] bg-violet-950/40 text-violet-400 px-2 py-0.5 rounded-full border border-violet-800/30'},v.type||'VST3'))):localData.soundfonts?.length===0?React.createElement('div',{className:'flex items-center justify-center h-32 text-zinc-500 text-xs'},'No SoundFonts found. Upload one below.'):localData.soundfonts.map((sf,i)=>React.createElement('div',{key:i,className:'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-amber-800/50 transition group'},React.createElement('div',{className:'flex items-center gap-3'},React.createElement('div',{className:'w-8 h-8 rounded bg-amber-900/30 flex items-center justify-center'},React.createElement('i',{'data-lucide':'music',className:'w-4 h-4 text-amber-400'})),React.createElement('div',null,React.createElement('div',{className:'text-xs font-semibold text-slate-200'},sf.display||sf.name||sf.id),React.createElement('div',{className:'text-[10px] text-zinc-500'},sf.file||sf.name))),React.createElement('div',{className:'flex items-center gap-2'},React.createElement('button',{onClick:()=>setSfToDelete(sf),className:'text-[10px] text-zinc-500 hover:text-red-400 opacity-0 group-hover:opacity-100 transition px-2 py-1'},'Delete'))))),// Plugin directories section (folder picker + save + scan)
+React.createElement('div',{className:'flex-1 overflow-y-auto p-4 bg-[#1e1e1e]'},!localData?React.createElement('div',{className:'flex items-center justify-center h-full text-zinc-500 text-xs'},'Loading...'):React.createElement('div',{className:'space-y-2'},pmTab==='vst'?localData.vst_instruments?.length===0?React.createElement('div',{className:'flex items-center justify-center h-32 text-zinc-500 text-xs'},'No VST instruments found on server.'):localData.vst_instruments.map((v,i)=>React.createElement('div',{key:i,className:'flex items-center justify-between bg-[#252525] px-4 py-3 rounded-lg border border-[#333] hover:border-violet-800/50 transition'},React.createElement('div',{className:'flex items-center gap-3'},React.createElement('div',{className:'w-8 h-8 rounded bg-violet-900/30 flex items-center justify-center'},React.createElement('i',{'data-lucide':'cpu',className:'w-4 h-4 text-violet-400'})),React.createElement('div',null,React.createElement('div',{className:'text-xs font-semibold text-slate-200'},v.name||v.id),React.createElement('div',{className:'text-[10px] text-zinc-500'},v.type||'VST3'))),React.createElement('span',{className:'text-[10px] bg-violet-950/40 text-violet-400 px-2 py-0.5 rounded-full border border-violet-800/30'},v.type||'VST3'))):localData.soundfonts?.length===0?React.createElement('div',{className:'flex items-center justify-center h-32 text-zinc-500 text-xs'},'No SoundFonts found. Upload one below.'):localData.soundfonts.map((sf,i)=>{const baseId=String(sf.id||'').replace('sf_','');const expanded=!!pmSfExpanded[baseId];const insts=pmSfInstruments[baseId]||[];const loading=!!pmSfLoading[baseId];return React.createElement('div',{key:i,className:'bg-[#252525] rounded-lg border border-[#333] hover:border-amber-800/50 transition group'},React.createElement('div',{className:'flex items-center justify-between px-4 py-3 cursor-pointer',onClick:()=>toggleSfInstruments(sf)},React.createElement('div',{className:'flex items-center gap-3'},React.createElement('div',{className:'w-8 h-8 rounded bg-amber-900/30 flex items-center justify-center'},React.createElement('i',{'data-lucide':'music',className:'w-4 h-4 text-amber-400'})),React.createElement('div',null,React.createElement('div',{className:'text-xs font-semibold text-slate-200'},sf.display||sf.name||sf.id),React.createElement('div',{className:'text-[10px] text-zinc-500'},(sf.file||sf.name)+(insts.length?' — '+insts.length+' instruments':'')))),React.createElement('div',{className:'flex items-center gap-2'},React.createElement('span',{className:'text-[10px] text-zinc-500'},expanded?'▾':'▸'),React.createElement('button',{onClick:e=>{e.stopPropagation();setSfToDelete(sf);},className:'text-[10px] text-zinc-500 hover:text-red-400 opacity-0 group-hover:opacity-100 transition px-2 py-1'},'Delete'))),expanded&&React.createElement('div',{className:'border-t border-[#333] px-3 py-1 max-h-40 overflow-y-auto'},loading?React.createElement('p',{className:'text-[10px] text-zinc-500 italic py-1'},'Đang đọc instruments...'):insts.length===0?React.createElement('p',{className:'text-[10px] text-zinc-500 italic py-1'},'Không có instrument (SF3 cần chuyển đổi trước)'):insts.map((p,pi)=>React.createElement('div',{key:'si_'+pi,className:'flex items-center gap-2 py-1 text-[11px]'},React.createElement('span',{className:'text-zinc-500 font-mono w-24 shrink-0 text-[9px]'},'B'+(p.bank||0)+' P'+(p.program||0)),React.createElement('span',{className:'flex-1 truncate text-zinc-300'},p.name||'Program '+p.program),React.createElement('button',{onClick:()=>onInsertInstrument&&onInsertInstrument({instrumentId:'sf_'+baseId,bank:p.bank||0,program:p.program||0,name:p.name||'Program '+p.program,displayName:(sf.display||sf.name||sf.id)+' — '+(p.name||'Program '+p.program)}),className:'text-[10px] bg-amber-800 hover:bg-amber-700 text-white px-2 py-0.5 rounded transition shrink-0'},'Chèn vào Synth')))));})),// ── 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'))),// Plugin directories section (folder picker + save + scan)
 React.createElement('div',{className:'pt-4 mt-4 border-t border-[#383838]'},React.createElement('div',{className:'flex items-center justify-between mb-2'},React.createElement('h4',{className:'text-xs font-bold text-zinc-400 uppercase'},'Plugin Directories'),React.createElement('button',{className:'px-3 py-1.5 bg-violet-800 hover:bg-violet-700 text-white text-xs font-semibold rounded transition flex items-center gap-1 shrink-0',title:'Add plugin directory (VST / SoundFont)',onClick:pickPluginFolder},React.createElement('i',{'data-lucide':'plus',className:'w-3 h-3'}),'Add Directory')),pmDirs.length===0&&React.createElement('p',{className:'text-[10px] text-zinc-600 mb-2 italic'},'Chưa có thư mục nào. Nhấn Add Directory để chọn thư mục chứa VST / SoundFont.'),pmDirs.map((dir,idx)=>React.createElement('div',{key:'pdir_'+idx,className:'flex items-center gap-2 mb-1.5 bg-zinc-800/70 border border-zinc-700 rounded px-2 py-1.5'},React.createElement('button',{className:'text-zinc-500 hover:text-red-400 transition shrink-0',title:'Remove directory',onClick:()=>removePluginDir(dir)},React.createElement('i',{'data-lucide':'x',className:'w-3.5 h-3.5'})),React.createElement('span',{className:'flex-1 text-[11px] text-zinc-300 font-mono truncate',title:dir},dir),React.createElement('i',{'data-lucide':'folder',className:'w-3 h-3 text-zinc-600 shrink-0'}))),React.createElement('div',{className:'flex gap-2 items-center mt-2'},React.createElement('button',{className:'px-4 py-2 bg-emerald-800 hover:bg-emerald-700 text-white text-xs font-semibold rounded transition flex items-center gap-1',onClick:saveAndScanDirs},React.createElement('i',{'data-lucide':'search',className:'w-3 h-3'}),'Scan'),pmScanning&&React.createElement('span',{className:'text-[10px] text-emerald-400'},'Scanning...'),pmScanResult&&React.createElement('span',{className:'text-[10px] text-zinc-400'},pmScanResult)),pmScanData&&React.createElement('div',{className:'mt-3 space-y-2 max-h-40 overflow-y-auto'},React.createElement('div',{className:'text-[10px] font-bold text-violet-300 uppercase flex items-center gap-1'},React.createElement('i',{'data-lucide':'cpu',className:'w-3 h-3'}),'VST Instruments ('+pmScanData.vst_found.length+')'),pmScanData.vst_found.length===0?React.createElement('p',{className:'text-[10px] text-zinc-600 italic'},'Không tìm thấy VST.'):pmScanData.vst_found.map((v,i)=>React.createElement('div',{key:'sv_'+i,className:'flex items-center gap-2 text-[11px] text-zinc-300'},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))),React.createElement('div',{className:'text-[10px] font-bold text-amber-300 uppercase flex items-center gap-1 mt-2'},React.createElement('i',{'data-lucide':'music',className:'w-3 h-3'}),'SoundFonts ('+pmScanData.soundfonts.length+')'),pmScanData.soundfonts.length===0?React.createElement('p',{className:'text-[10px] text-zinc-600 italic'},'Không tìm thấy SoundFont.'):pmScanData.soundfonts.map((s,i)=>React.createElement('div',{key:'ss_'+i,className:'flex items-center gap-2 text-[11px] text-zinc-300'},React.createElement('span',{className:'truncate'},s.name),React.createElement('span',{className:'text-[9px] text-zinc-600 font-mono truncate ml-auto'},s.dir))))),// Upload section (bottom of right panel)
 React.createElement('div',{className:'pt-4 mt-4 border-t border-[#383838]'},React.createElement('h4',{className:'text-xs font-bold text-zinc-400 mb-3 uppercase'},pmTab==='vst'?'Add VST Directory':'Upload SoundFont'),pmTab==='vst'?React.createElement('div',{className:'flex gap-2'},React.createElement('input',{type:'text',placeholder:'/opt/daw_engine/vst3',className:'flex-1 bg-zinc-800 border border-zinc-700 rounded px-3 py-2 text-xs text-zinc-300 focus:outline-none focus:border-violet-600'}),React.createElement('button',{className:'px-4 py-2 bg-violet-800 hover:bg-violet-700 text-white text-xs font-semibold rounded transition',onClick:async()=>{try{const data=await window.SonicAPI.listPlugins();setLocalData(data);showToast('Scanned VST directory.','info');}catch(err){showToast('Scan failed: '+err.message,'error');}}},'Scan')):React.createElement('div',{className:'space-y-2'},React.createElement('label',{className:'flex items-center gap-3 px-4 py-3 border-2 border-dashed border-zinc-700 rounded-lg cursor-pointer hover:border-amber-600/50 bg-zinc-800/40 transition'},React.createElement('i',{'data-lucide':'upload',className:'w-5 h-5 text-zinc-400'}),React.createElement('span',{className:'text-xs text-zinc-400'},'Click to upload .sf2 / .sf3 file'),React.createElement('input',{type:'file',accept:'.sf2,.sf3',onChange:async e=>{const file=e.target.files?.[0];if(!file)return;setSfUploadStatus('Uploading...');try{await window.SonicAPI.uploadSoundFont(file);setSfUploadStatus('Uploaded: '+file.name);const data=await window.SonicAPI.listPlugins();setLocalData(data);}catch(err){setSfUploadStatus('Error: '+err.message);}},className:'hidden'})),sfUploadStatus&&React.createElement('p',{className:'text-[10px] text-zinc-500'},sfUploadStatus)))))),// Status bar at bottom
 React.createElement('div',{className:'px-5 py-2 bg-[#1a1a1a] border-t border-[#383838] flex items-center justify-between text-[10px] text-zinc-500'},React.createElement('span',null,'VST: ',localData?.vst_instruments?.length||0,' | SoundFonts: ',localData?.soundfonts?.length||0),React.createElement('span',null,'Last scanned: ',new Date().toLocaleTimeString())),// Delete confirmation modal
@@ -672,7 +680,7 @@ isLoopingRef.current=next;const cur=selectedRef.current;const st=playStateRef.cu
 // the loop points to the current selection so it loops continuously
 // over the selected region until Stop is pressed.
 if(next&&st.source.buffer){if(hasSelection){st.source.loopStart=Math.min(sStart,sEnd);st.source.loopEnd=Math.max(sStart,sEnd);}else{st.source.loopStart=0;st.source.loopEnd=st.source.buffer.duration;}}}if(next&&isMidiFile(cur)){// Re-schedule loop for the currently previewing MIDI file
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text-[9px] select-none cursor-pointer",title:"Reset Zoom",onClick:()=>setZoom(1.0)},"1x")),previewCtxMenu&&/*#__PURE__*/React.createElement("div",{className:"fixed bg-[#1e1e24] border border-[#3e3e4a] rounded shadow-md z-[9999] py-1 font-sans text-xs text-slate-300 w-32 cursor-pointer select-none",style:{top:previewCtxMenu.y,left:previewCtxMenu.x},onClick:e=>e.stopPropagation()},/*#__PURE__*/React.createElement("div",{className:"px-3 py-1.5 hover:bg-slate-700 hover:text-white flex items-center gap-2",onClick:()=>{handleCopySelection();setPreviewCtxMenu(null);}},/*#__PURE__*/React.createElement("i",{className:"fa-solid fa-copy"})," Copy"),/*#__PURE__*/React.createElement("div",{className:"px-3 py-1.5 hover:bg-slate-700 hover:text-white border-t border-[#3e3e4a] flex items-center gap-2",onClick:()=>setPreviewCtxMenu(null)},/*#__PURE__*/React.createElement("i",{className:"fa-solid fa-xmark"})," Cancel"))),/*#__PURE__*/React.createElement("div",{className:"w-48 bg-[#181818] border border-[#3a3a3a] p-1.5 font-mono text-[10px] text-slate-300 leading-tight overflow-y-auto shrink-0"},selected?selIsMidi&&!selected.path?/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",null,selected.events," MIDI events"),/*#__PURE__*/React.createElement("div",null,"Length: ",selected.lengthQn," quarter notes"),/*#__PURE__*/React.createElement("div",null,"Length: ",selected.time," (est)"),/*#__PURE__*/React.createElement("div",null,"Ticks per quarter note: ",selected.tpqn)):/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",null,"Size: ",selected.size_mb!=null?selected.size_mb.toFixed(2)+' MB':'-'),selIsMidi?/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",null,"Bars: ",midiBars||1),/*#__PURE__*/React.createElement("div",null,"Beats: ",Math.round(midiTotalBeats||16)),/*#__PURE__*/React.createElement("div",null,"BPM: ",midiFileBpm||120),/*#__PURE__*/React.createElement("div",null,"Duration: ",selDur.toFixed(2),"s")):/*#__PURE__*/React.createElement(React.Fragment,null,/*#__PURE__*/React.createElement("div",null,"Duration: ",selDur.toFixed(2),"s"),/*#__PURE__*/React.createElement("div",null,"Sample Rate: 44100 Hz"),/*#__PURE__*/React.createElement("div",null,"Type: ",selected.path?selected.kind==='other'?'Local File':'Local Audio':selected.type||'Audio'))):/*#__PURE__*/React.createElement("div",null,"No file selected"))),/*#__PURE__*/React.createElement("div",{className:"h-5 bg-[#c0c0c0] border-t border-white flex items-center justify-between text-[11px] font-mono px-1 shrink-0"},/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3"},selIsMidi&&midiNotes&&midiNotes.length?/*#__PURE__*/React.createElement("div",{className:"bg-white border border-[#808080] px-1.5 text-slate-900 font-bold"},"Bar ",Math.max(1,Math.floor(currentTime/(4*60/(tempo||120)))+1)," / ",midiBars||1,/*#__PURE__*/React.createElement("span",{className:"text-slate-500 ml-1"},"| ",formatTime(currentTime)," / ",formatTime(selDur))):/*#__PURE__*/React.createElement("div",{className:"bg-white border border-[#808080] px-1.5 text-slate-900 font-bold"},formatTime(currentTime)," / ",formatTime(selDur))),/*#__PURE__*/React.createElement("div",{className:"text-slate-800 font-bold truncate max-w-[40%]"},selected?selected.name||selected.original_name:'No file selected'),/*#__PURE__*/React.createElement("div",{className:"text-slate-700"},selBpm," bpm x",rate.toFixed(2)))));};const App=()=>{// ── State Definitions ──
 const[tracks,setTracks]=useState([{id:'1',name:'Track 01',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#0f766e',markers:[],serverFileId:null,clips:[],sections:[],midiItems:[],isArmed:false,monitoringEnabled:true,inputSource:{deviceType:'NONE',deviceId:''}},{id:'2',name:'Track 02',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#1d4ed8',markers:[],serverFileId:null,clips:[],sections:[],midiItems:[],isArmed:false,monitoringEnabled:true,inputSource:{deviceType:'NONE',deviceId:''}}]);const[appWarningModal,setAppWarningModal]=useState(null);const[bpm,setBpm]=useState(localStorage.getItem('studio_bpm')||'120');const prevBpmRef=useRef(bpm);const[draggedClip,setDraggedClip]=useState(null);const[hoveredTrackId,setHoveredTrackId]=useState(null);// Recalculate item/section/selection durations when BPM changes
 useEffect(()=>{const oldSpb=prevBpmRef.current?60.0/parseFloat(prevBpmRef.current)*4:null;const bpmVal=parseFloat(bpm)||120;const secondsPerBar=60.0/bpmVal*4;// Recalculate range loop selection to maintain bar count (tempo mode only)
 if(oldSpb&&selectionFollowsTempo&&selectionStart!==null&&selectionEnd!==null&&selectionEnd>selectionStart){const startBar=selectionStart/oldSpb;const endBar=selectionEnd/oldSpb;if(endBar-startBar>0.01){setSelectionStart(startBar*secondsPerBar);setSelectionEnd(endBar*secondsPerBar);}}prevBpmRef.current=bpm;// Force canvas redraw
@@ -767,7 +775,10 @@ const[contextMenu,setContextMenu]=useState(null);// { x, y, trackId }
 // window.__setPrHint (mouse in/out + Shift/Ctrl state)
 const[prHint,setPrHint]=useState(null);React.useEffect(()=>{window.__setPrHint=h=>setPrHint(h||null);return()=>{delete window.__setPrHint;};},[]);const clipboardRef=useRef(null);// { buffer, name, volume, color } for copy/paste
 // ── Undo/Redo Engine (LOOP_EDITOR.md §4 + Global Extension) ──
-const[undoStack,setUndoStack]=useState([]);const[redoStack,setRedoStack]=useState([]);const MAX_UNDO=30;const pushAction=(actionType,trackId,beforeState,afterState)=>{const node={action_type:actionType,track_id:trackId,timestamp:Date.now(),before_state:beforeState,after_state:afterState};setUndoStack(prev=>{const next=[...prev,node];if(next.length>MAX_UNDO)next.shift();return next;});setRedoStack([]);};const handleUndo=()=>{if(window.UndoRedoEngine&&window.UndoRedoEngine.canUndo()){const entry=window.UndoRedoEngine.undo();if(entry){if(entry.undo&&typeof entry.undo==='function')entry.undo(entry);showToast(`Undo: ${entry.label||entry.type}`,'info');return;}}if(undoStack.length===0)return;const last=undoStack[undoStack.length-1];setUndoStack(prev=>prev.slice(0,-1));setRedoStack(prev=>[...prev,last]);applyTrackState(last.track_id,last.before_state);showToast(`Undo: ${last.action_type}`,'info');};const handleRedo=()=>{if(window.UndoRedoEngine&&window.UndoRedoEngine.canRedo()){const entry=window.UndoRedoEngine.redo();if(entry){if(entry.redo&&typeof entry.redo==='function')entry.redo(entry);showToast(`Redo: ${entry.label||entry.type}`,'info');return;}}if(redoStack.length===0)return;const last=redoStack[redoStack.length-1];setRedoStack(prev=>prev.slice(0,-1));setUndoStack(prev=>[...prev,last]);applyTrackState(last.track_id,last.after_state);showToast(`Redo: ${last.action_type}`,'info');};const applyTrackState=(trackId,state)=>{if(trackId==='ALL_TRACKS'){state.forEach(entry=>{applyTrackState(entry.trackId,entry.state);});return;}updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;var updated={...t,...state};if(state.sections!==undefined){updated.sections=state.sections;}if(state.midiItems!==undefined){updated.midiItems=state.midiItems;}if(state.clips!==undefined){updated.clips=state.clips;}return updated;}));};const getSelectedMidiItemInfo=()=>{if(!selectedItemIds||selectedItemIds.size!==1)return null;const selId=selectedItemIds.values().next().value;const tlist=activeTracks||tracks||[];for(const t of tlist){const found=(t.midiItems||[]).find(m=>m.id===selId);if(found)return{itemName:found.name,trackName:t.name,trackId:t.id,itemId:selId,notes:found.notes||[],startTime:found.startTime||0,duration:found.duration||4};}return null;};const captureTrackSnapshot=trackId=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return null;return{volumeDb:track.volumeDb,pan:track.pan,muted:track.muted,name:track.name,markers:JSON.parse(JSON.stringify(track.markers||[])),buffer:track.buffer,startTime:track.startTime||0,clips:track.clips?track.clips.map(c=>({id:c.id,buffer:c.buffer,startTime:c.startTime,name:c.name})):null,sections:track.sections?track.sections.map(function(s){return{id:s.id,start:s.start,duration:s.duration,name:s.name,color:s.color,notes:s.notes?s.notes.map(function(n){return{id:n.id,pitch:n.pitch,start_beat:n.start_beat,duration_beats:n.duration_beats,velocity:n.velocity};}):null,tracks:s.tracks?s.tracks.map(function(st){return{id:st.id,name:st.name,color:st.color,clips:st.clips?st.clips.map(function(c){return{id:c.id,startTime:c.startTime,name:c.name,speed:c.speed,buffer:c.buffer};}):null,midiItems:st.midiItems?st.midiItems.map(function(m){return{id:m.id,startTime:m.startTime,duration:m.duration,name:m.name,notes:m.notes?m.notes.map(function(n){return{id:n.id,pitch:n.pitch,start_beat:n.start_beat,duration_beats:n.duration_beats,velocity:n.velocity};}):null};}):null};}):null};}):null,midiItems:track.midiItems?track.midiItems.map(function(m){return{id:m.id,startTime:m.startTime,duration:m.duration,name:m.name,notes:m.notes?m.notes.map(function(n){return{id:n.id,pitch:n.pitch,start_beat:n.start_beat,duration_beats:n.duration_beats,velocity:n.velocity};}):null};}):null};};const captureAllTracksSnapshot=()=>{const curTracks=activeTracksRef.current||activeTracks||[];return curTracks.map(t=>({trackId:t.id,state:captureTrackSnapshot(t.id)}));};const setBpmWithUndo=newBpm=>{const oldBpm=bpmRef.current;if(String(oldBpm)===String(newBpm))return;const entry={type:'SET_BPM',scope:'global',label:`BPM ${oldBpm} → ${newBpm}`,before:oldBpm,after:newBpm,undo:e=>{setBpm(e.before);showToast(`Undo: BPM → ${e.before}`,'info');},redo:e=>{setBpm(e.after);showToast(`Redo: BPM → ${e.after}`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setBpm(String(newBpm));};const setPlayheadWithUndo=newTime=>{const oldTime=currentTime;if(Math.abs(oldTime-newTime)<0.001)return;const entry={type:'SET_PLAYHEAD',scope:'global',label:`Playhead ${formatTimeSimple(oldTime)} → ${formatTimeSimple(newTime)}`,before:oldTime,after:newTime,undo:e=>{applyPlayheadDirect(e.before);showToast(`Undo: Playhead`,'info');},redo:e=>{applyPlayheadDirect(e.after);showToast(`Redo: Playhead`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);applyPlayheadDirect(newTime);};const applyPlayheadDirect=time=>{localSelectionAnchorRef.current=time;if(isPlaying){setCurrentTime(time);stopAllPlayback();setTimeout(()=>{startOffsetTimeRef.current=time;startAudioTimeRef.current=getAudioContext().currentTime;startTrackPlayback(time);setIsPlaying(true);},50);}else{setCurrentTime(time);}};const setSelectionWithUndo=(newStart,newEnd,mode)=>{const oldStart=selectionRef.current.start;const oldEnd=selectionRef.current.end;const oldMode=selectionMode;if(oldStart===newStart&&oldEnd===newEnd&&oldMode===mode)return;const entry={type:'SET_SELECTION',scope:'global',label:`Selection`,before:{start:oldStart,end:oldEnd,mode:oldMode},after:{start:newStart,end:newEnd,mode:mode},undo:e=>{setSelectionStart(e.before.start);setSelectionEnd(e.before.end);setSelectionMode(e.before.mode);showToast(`Undo: Selection`,'info');},redo:e=>{setSelectionStart(e.after.start);setSelectionEnd(e.after.end);setSelectionMode(e.after.mode);showToast(`Redo: Selection`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setSelectionStart(newStart);setSelectionEnd(newEnd);if(mode!==undefined)setSelectionMode(mode);};const setSelectedItemsWithUndo=newSet=>{const oldSet=selectedItemIdsRef.current;if(oldSet&&newSet&&oldSet.size===newSet.size&&[...oldSet].every(x=>newSet.has(x)))return;const entry={type:'SELECT_ITEMS',scope:'global',label:`Selection`,before:[...oldSet],after:[...newSet],undo:e=>{setSelectedItemIds(new Set(e.before));showToast(`Undo: Selection`,'info');},redo:e=>{setSelectedItemIds(new Set(e.after));showToast(`Redo: Selection`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setSelectedItemIds(newSet);};const setAiPromptWithUndo=newText=>{const oldText=aiPrompt;if(oldText===newText)return;const entry={type:'SET_AI_PROMPT',scope:'global',label:`AI Prompt`,before:oldText,after:newText,undo:e=>{setAiPrompt(e.before);showToast(`Undo: AI Prompt`,'info');},redo:e=>{setAiPrompt(e.after);showToast(`Redo: AI Prompt`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setAiPrompt(newText);};const setTrackInstrumentWithUndo=(trackId,instrumentId,displayName,bankNumber,programNumber)=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return;const oldInstrumentId=track.instrumentId;const oldInstrumentName=track.instrumentName;if(oldInstrumentId===instrumentId&&oldInstrumentName===displayName)return;const entry={type:'SET_INSTRUMENT',scope:'track:'+trackId,label:`Instrument ${track.name}`,before:{instrumentId:oldInstrumentId,instrumentName:oldInstrumentName,bankNumber:track.soundfont_bank,programNumber:track.instrumentProgram},after:{instrumentId,instrumentName:displayName,bankNumber,programNumber},undo:e=>{setTrackInstrumentWithProgram(trackId,e.before.instrumentId,e.before.programNumber,e.before.instrumentName,e.before.bankNumber);showToast(`Undo: Instrument`,'info');},redo:e=>{setTrackInstrumentWithProgram(trackId,e.after.instrumentId,e.after.programNumber,e.after.instrumentName,e.after.bankNumber);showToast(`Redo: Instrument`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setTrackInstrumentWithProgram(trackId,instrumentId,programNumber,displayName,bankNumber);};const createSectionWithUndo=(trackId,section)=>{const entry={type:'CREATE_SECTION',scope:'track:'+trackId,label:`Create Section`,before:null,after:section,undo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,sections:(t.sections||[]).filter(s=>s.id!==e.after.id)}:t));showToast(`Undo: Create Section`,'info');},redo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,sections:[...(t.sections||[]),e.after]}:t));showToast(`Redo: Create Section`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};const createMidiWithUndo=(trackId,midiItem)=>{const entry={type:'CREATE_MIDI',scope:'track:'+trackId,label:`Create MIDI Item`,before:null,after:midiItem,undo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,midiItems:(t.midiItems||[]).filter(m=>m.id!==e.after.id)}:t));showToast(`Undo: Create MIDI`,'info');},redo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,midiItems:[...(t.midiItems||[]),e.after]}:t));showToast(`Redo: Create MIDI`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};const createClipWithUndo=(trackId,clip)=>{const entry={type:'CREATE_CLIP',scope:'track:'+trackId,label:`Create Audio Clip`,before:null,after:clip,undo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,clips:(t.clips||[]).filter(c=>c.id!==e.after.id),buffer:(t.clips||[]).filter(c=>c.id!==e.after.id)[0]?.buffer||null,startTime:(t.clips||[]).filter(c=>c.id!==e.after.id)[0]?.startTime||0,name:(t.clips||[]).filter(c=>c.id!==e.after.id)[0]?.name||t.name}:t));showToast(`Undo: Create Clip`,'info');},redo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,clips:[...(t.clips||[]),e.after]}:t));showToast(`Redo: Create Clip`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};const deleteTrackWithUndo=(trackId,trackData)=>{const entry={type:'DELETE_TRACK',scope:'global',label:`Delete Track`,before:trackData,after:null,undo:e=>{if(e.before){setTracks(prev=>[...prev,e.before]);showToast(`Undo: Delete Track`,'info');}},redo:e=>{setTracks(prev=>prev.filter(t=>t.id!==trackId));showToast(`Redo: Delete Track`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};// ── Tab System (LOOP_EDITOR_2.md §1) ──
+const[undoStack,setUndoStack]=useState([]);const[redoStack,setRedoStack]=useState([]);const MAX_UNDO=30;const pushAction=(actionType,trackId,beforeState,afterState)=>{const node={action_type:actionType,track_id:trackId,timestamp:Date.now(),before_state:beforeState,after_state:afterState};setUndoStack(prev=>{const next=[...prev,node];if(next.length>MAX_UNDO)next.shift();return next;});setRedoStack([]);};const handleUndo=()=>{if(window.UndoRedoEngine&&window.UndoRedoEngine.canUndo()){const entry=window.UndoRedoEngine.undo();if(entry){if(entry.undo&&typeof entry.undo==='function')entry.undo(entry);showToast(`Undo: ${entry.label||entry.type}`,'info');return;}}if(undoStack.length===0)return;const last=undoStack[undoStack.length-1];setUndoStack(prev=>prev.slice(0,-1));setRedoStack(prev=>[...prev,last]);applyTrackState(last.track_id,last.before_state);showToast(`Undo: ${last.action_type}`,'info');};const handleRedo=()=>{if(window.UndoRedoEngine&&window.UndoRedoEngine.canRedo()){const entry=window.UndoRedoEngine.redo();if(entry){if(entry.redo&&typeof entry.redo==='function')entry.redo(entry);showToast(`Redo: ${entry.label||entry.type}`,'info');return;}}if(redoStack.length===0)return;const last=redoStack[redoStack.length-1];setRedoStack(prev=>prev.slice(0,-1));setUndoStack(prev=>[...prev,last]);applyTrackState(last.track_id,last.after_state);showToast(`Redo: ${last.action_type}`,'info');};const applyTrackState=(trackId,state)=>{if(trackId==='ALL_TRACKS'){state.forEach(entry=>{applyTrackState(entry.trackId,entry.state);});return;}updateActiveTracks(prev=>prev.map(t=>{if(t.id!==trackId)return t;var updated={...t,...state};if(state.sections!==undefined){updated.sections=state.sections;}if(state.midiItems!==undefined){updated.midiItems=state.midiItems;}if(state.clips!==undefined){updated.clips=state.clips;}return updated;}));};const getSelectedMidiItemInfo=()=>{if(!selectedItemIds||selectedItemIds.size!==1)return null;const selId=selectedItemIds.values().next().value;const tlist=activeTracks||tracks||[];for(const t of tlist){const found=(t.midiItems||[]).find(m=>m.id===selId);if(found)return{itemName:found.name,trackName:t.name,trackId:t.id,itemId:selId,notes:found.notes||[],startTime:found.startTime||0,duration:found.duration||4};}return null;};const captureTrackSnapshot=trackId=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return null;return{volumeDb:track.volumeDb,pan:track.pan,muted:track.muted,name:track.name,markers:JSON.parse(JSON.stringify(track.markers||[])),buffer:track.buffer,startTime:track.startTime||0,clips:track.clips?track.clips.map(c=>({id:c.id,buffer:c.buffer,startTime:c.startTime,name:c.name})):null,sections:track.sections?track.sections.map(function(s){return{id:s.id,start:s.start,duration:s.duration,name:s.name,color:s.color,notes:s.notes?s.notes.map(function(n){return{id:n.id,pitch:n.pitch,start_beat:n.start_beat,duration_beats:n.duration_beats,velocity:n.velocity};}):null,tracks:s.tracks?s.tracks.map(function(st){return{id:st.id,name:st.name,color:st.color,clips:st.clips?st.clips.map(function(c){return{id:c.id,startTime:c.startTime,name:c.name,speed:c.speed,buffer:c.buffer};}):null,midiItems:st.midiItems?st.midiItems.map(function(m){return{id:m.id,startTime:m.startTime,duration:m.duration,name:m.name,notes:m.notes?m.notes.map(function(n){return{id:n.id,pitch:n.pitch,start_beat:n.start_beat,duration_beats:n.duration_beats,velocity:n.velocity};}):null};}):null};}):null};}):null,midiItems:track.midiItems?track.midiItems.map(function(m){return{id:m.id,startTime:m.startTime,duration:m.duration,name:m.name,notes:m.notes?m.notes.map(function(n){return{id:n.id,pitch:n.pitch,start_beat:n.start_beat,duration_beats:n.duration_beats,velocity:n.velocity};}):null};}):null};};const captureAllTracksSnapshot=()=>{const curTracks=activeTracksRef.current||activeTracks||[];return curTracks.map(t=>({trackId:t.id,state:captureTrackSnapshot(t.id)}));};const setBpmWithUndo=newBpm=>{const oldBpm=bpmRef.current;if(String(oldBpm)===String(newBpm))return;const entry={type:'SET_BPM',scope:'global',label:`BPM ${oldBpm} → ${newBpm}`,before:oldBpm,after:newBpm,undo:e=>{setBpm(e.before);showToast(`Undo: BPM → ${e.before}`,'info');},redo:e=>{setBpm(e.after);showToast(`Redo: BPM → ${e.after}`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setBpm(String(newBpm));};const setPlayheadWithUndo=newTime=>{const oldTime=currentTime;if(Math.abs(oldTime-newTime)<0.001)return;const entry={type:'SET_PLAYHEAD',scope:'global',label:`Playhead ${formatTimeSimple(oldTime)} → ${formatTimeSimple(newTime)}`,before:oldTime,after:newTime,undo:e=>{applyPlayheadDirect(e.before);showToast(`Undo: Playhead`,'info');},redo:e=>{applyPlayheadDirect(e.after);showToast(`Redo: Playhead`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);applyPlayheadDirect(newTime);};const applyPlayheadDirect=time=>{localSelectionAnchorRef.current=time;if(isPlaying){setCurrentTime(time);stopAllPlayback();setTimeout(()=>{startOffsetTimeRef.current=time;startAudioTimeRef.current=getAudioContext().currentTime;startTrackPlayback(time);setIsPlaying(true);},50);}else{setCurrentTime(time);}};const setSelectionWithUndo=(newStart,newEnd,mode)=>{const oldStart=selectionRef.current.start;const oldEnd=selectionRef.current.end;const oldMode=selectionMode;if(oldStart===newStart&&oldEnd===newEnd&&oldMode===mode)return;const entry={type:'SET_SELECTION',scope:'global',label:`Selection`,before:{start:oldStart,end:oldEnd,mode:oldMode},after:{start:newStart,end:newEnd,mode:mode},undo:e=>{setSelectionStart(e.before.start);setSelectionEnd(e.before.end);setSelectionMode(e.before.mode);showToast(`Undo: Selection`,'info');},redo:e=>{setSelectionStart(e.after.start);setSelectionEnd(e.after.end);setSelectionMode(e.after.mode);showToast(`Redo: Selection`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setSelectionStart(newStart);setSelectionEnd(newEnd);if(mode!==undefined)setSelectionMode(mode);};const setSelectedItemsWithUndo=newSet=>{const oldSet=selectedItemIdsRef.current;if(oldSet&&newSet&&oldSet.size===newSet.size&&[...oldSet].every(x=>newSet.has(x)))return;const entry={type:'SELECT_ITEMS',scope:'global',label:`Selection`,before:[...oldSet],after:[...newSet],undo:e=>{setSelectedItemIds(new Set(e.before));showToast(`Undo: Selection`,'info');},redo:e=>{setSelectedItemIds(new Set(e.after));showToast(`Redo: Selection`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setSelectedItemIds(newSet);};const setAiPromptWithUndo=newText=>{const oldText=aiPrompt;if(oldText===newText)return;const entry={type:'SET_AI_PROMPT',scope:'global',label:`AI Prompt`,before:oldText,after:newText,undo:e=>{setAiPrompt(e.before);showToast(`Undo: AI Prompt`,'info');},redo:e=>{setAiPrompt(e.after);showToast(`Redo: AI Prompt`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setAiPrompt(newText);};// Gán preset VST3 (.vstpreset từ thư viện storage/presets — cầu nối
+// Carla → pedalboard) vào track: preset_id nằm trong synth_engine → render
+// engine tải qua load_preset khi render → âm render = âm đã chỉnh trong Carla.
+const setTrackPreset=(trackId,presetId)=>{if(!trackId||!presetId)return;var mt=activeTracksRef.current||tracks;var cur=null;for(var ci=0;ci<mt.length;ci++){if(mt[ci].id===trackId){cur=mt[ci];break;}}if(!cur)return;var se=cur.synth_engine||{};if(!se.plugin_id||String(se.type||'').indexOf('vst')===-1){showToast('Chọn VST instrument trước khi gán preset','warning');return;}updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,synth_engine:{...(t.synth_engine||{}),preset_id:presetId}}:t));setInstrumentDropdownTrackId(null);setInstrumentDropdownBtnRect(null);var p=(window.SonicRuntime&&window.SonicRuntime.presets||[]).find(function(x){return x.id===presetId;});showToast('Đã gán preset: '+(p&&p.name||presetId),'success');};const setTrackInstrumentWithUndo=(trackId,instrumentId,displayName,bankNumber,programNumber)=>{const track=activeTracks.find(t=>t.id===trackId);if(!track)return;const oldInstrumentId=track.instrumentId;const oldInstrumentName=track.instrumentName;if(oldInstrumentId===instrumentId&&oldInstrumentName===displayName)return;const entry={type:'SET_INSTRUMENT',scope:'track:'+trackId,label:`Instrument ${track.name}`,before:{instrumentId:oldInstrumentId,instrumentName:oldInstrumentName,bankNumber:track.soundfont_bank,programNumber:track.instrumentProgram},after:{instrumentId,instrumentName:displayName,bankNumber,programNumber},undo:e=>{setTrackInstrumentWithProgram(trackId,e.before.instrumentId,e.before.programNumber,e.before.instrumentName,e.before.bankNumber);showToast(`Undo: Instrument`,'info');},redo:e=>{setTrackInstrumentWithProgram(trackId,e.after.instrumentId,e.after.programNumber,e.after.instrumentName,e.after.bankNumber);showToast(`Redo: Instrument`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);setTrackInstrumentWithProgram(trackId,instrumentId,programNumber,displayName,bankNumber);};const createSectionWithUndo=(trackId,section)=>{const entry={type:'CREATE_SECTION',scope:'track:'+trackId,label:`Create Section`,before:null,after:section,undo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,sections:(t.sections||[]).filter(s=>s.id!==e.after.id)}:t));showToast(`Undo: Create Section`,'info');},redo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,sections:[...(t.sections||[]),e.after]}:t));showToast(`Redo: Create Section`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};const createMidiWithUndo=(trackId,midiItem)=>{const entry={type:'CREATE_MIDI',scope:'track:'+trackId,label:`Create MIDI Item`,before:null,after:midiItem,undo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,midiItems:(t.midiItems||[]).filter(m=>m.id!==e.after.id)}:t));showToast(`Undo: Create MIDI`,'info');},redo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,midiItems:[...(t.midiItems||[]),e.after]}:t));showToast(`Redo: Create MIDI`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};const createClipWithUndo=(trackId,clip)=>{const entry={type:'CREATE_CLIP',scope:'track:'+trackId,label:`Create Audio Clip`,before:null,after:clip,undo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,clips:(t.clips||[]).filter(c=>c.id!==e.after.id),buffer:(t.clips||[]).filter(c=>c.id!==e.after.id)[0]?.buffer||null,startTime:(t.clips||[]).filter(c=>c.id!==e.after.id)[0]?.startTime||0,name:(t.clips||[]).filter(c=>c.id!==e.after.id)[0]?.name||t.name}:t));showToast(`Undo: Create Clip`,'info');},redo:e=>{updateActiveTracks(prev=>prev.map(t=>t.id===trackId?{...t,clips:[...(t.clips||[]),e.after]}:t));showToast(`Redo: Create Clip`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};const deleteTrackWithUndo=(trackId,trackData)=>{const entry={type:'DELETE_TRACK',scope:'global',label:`Delete Track`,before:trackData,after:null,undo:e=>{if(e.before){setTracks(prev=>[...prev,e.before]);showToast(`Undo: Delete Track`,'info');}},redo:e=>{setTracks(prev=>prev.filter(t=>t.id!==trackId));showToast(`Redo: Delete Track`,'info');}};if(window.UndoRedoEngine)window.UndoRedoEngine.execute(entry);};// ── Tab System (LOOP_EDITOR_2.md §1) ──
 const[activeTab,setActiveTab]=useState('main');const[subTabSelectedNodeTime,setSubTabSelectedNodeTime]=useState(null);const[subTabNormVal,setSubTabNormVal]=useState(0);const[subTabGainVal,setSubTabGainVal]=useState(100);const[subTabPitchVal,setSubTabPitchVal]=useState(0);const[subTabs,setSubTabs]=useState([]);// [{id, label, trackId, startTime, endTime, buffer, effects, currentTime, selectionStart, selectionEnd, isPlaying}, ...]
 const[pianoRollClipboard,setPianoRollClipboard]=useState(null);// notes copy giữa các PIANO ROLL TAB
 const[sessionTabs,setSessionTabs]=useState([]);// [{id, name, tracks}, ...]
@@ -1611,5 +1622,6 @@ if(window.__mediaExplorerDragFile){const f=await resolveMediaExplorerDropFile();
 if(window.__mediaExplorerDragFile){const f=await resolveMediaExplorerDropFile();window.__mediaExplorerDragFile=null;if(f)loadFileOnTrack(track.id,f);return;}const f=e.dataTransfer.files&&e.dataTransfer.files[0];if(!f)return;loadFileOnTrack(track.id,f);},onMouseEnter:()=>{setHoveredTrackId(track.id);hoveredTrackIdRef.current=track.id;}},/*#__PURE__*/React.createElement(WaveformLane,{track:track,zoom:zoom,timelineWidth:timelineWidth,viewportWidth:viewportWidth,scrollLeft:scrollLeft,onSelectRange:handleSelectRange,onPlayheadSet:handlePlayheadSet,isSelected:isSelected,selectedItemIds:selectedItemIds,onSelectTrack:setSelectedTrackId,markers:track.markers,onTrackLaneMouseDown:handleTrackLaneMouseDown,onClearSelection:()=>{captureSelectionUndo();setSelectedItemIds(new 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'+(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",{key:"psd_"+i,onClick:()=>setTrackPreset(instrumentDropdownTrackId,p.id),className:"w-full text-left px-3 py-1 text-xs bg-zinc-800 hover:bg-emerald-800 text-zinc-300 flex items-center justify-between"},/*#__PURE__*/React.createElement("span",{className:"truncate"},p.name||p.id),/*#__PURE__*/React.createElement("span",{className:"text-[10px] text-emerald-400 shrink-0 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diff --git a/app/static/js/services/api.js b/app/static/js/services/api.js
index e7aa8b8..61bad4c 100644
--- a/app/static/js/services/api.js
+++ b/app/static/js/services/api.js
@@ -17,6 +17,8 @@ window.API_BASE_URL = window.API_BASE_URL || window.location.origin;
     async function apiRequest(endpoint, options = {}) {
         const url = `${window.API_BASE_URL}${endpoint}`;
         const headers = { ...getAuthHeaders(), ...options.headers };
+        // FormData: browser tự đặt Content-Type kèm boundary — không được ép JSON
+        if (options.body instanceof FormData) delete headers['Content-Type'];
         const response = await fetch(url, { ...options, headers });
         
         if (response.status === 401) {
@@ -67,6 +69,24 @@ window.API_BASE_URL = window.API_BASE_URL || window.location.origin;
         getPluginDirs: () => apiRequest('/api/v1/plugins/dirs', { method: 'GET' }),
         savePluginDirs: (dirs) => apiRequest('/api/v1/plugins/dirs', { method: 'POST', body: JSON.stringify(dirs) }),
         scanPluginDirs: () => apiRequest('/api/v1/plugins/scan', { method: 'POST' }),
+        // Runtime capabilities — frontend gọi lúc boot để biết môi trường
+        // (desktop Windows / docker headless) và bật/tắt tính năng
+        getCapabilities: () => apiRequest('/api/v1/system/capabilities', { method: 'GET' }),
+        // Định vị Carla.exe (bản portable zip không cài đặt/PATH) — lưu config
+        setCarlaPath: (path) => apiRequest('/api/v1/system/carla-path', { method: 'POST', body: JSON.stringify({ carla_path: path }) }),
+        // Mở native GUI VSTi trong Carla (chỉ khi runtime=desktop + có Carla local)
+        openInCarla: (pluginName, pluginPath) => apiRequest('/api/v1/plugins/open-in-carla', { method: 'POST', body: JSON.stringify({ plugin_name: pluginName, plugin_path: pluginPath }) }),
+        // Quick-render preview VSTi (âm thật = âm export, cùng code path)
+        previewInstrument: (payload) => apiRequest('/api/v1/plugins/preview', { method: 'POST', body: JSON.stringify(payload) }),
+        // Thư viện preset VST3 (.vstpreset) — cầu nối Carla → pedalboard
+        listPresets: () => apiRequest('/api/v1/presets', { method: 'GET' }),
+        uploadPreset: (file, pluginHint) => {
+            const fd = new FormData();
+            fd.append('file', file);
+            if (pluginHint) fd.append('plugin_hint', pluginHint);
+            return apiRequest('/api/v1/presets/upload', { method: 'POST', body: fd });
+        },
+        deletePreset: (presetId) => apiRequest(`/api/v1/presets/${presetId}`, { method: 'DELETE' }),
         // Native folder picker (Explorer qua Tauri bridge / PowerShell) —
         // user yêu cầu dùng window explorer, không nhập tay
         pickPluginDir: () => apiRequest('/api/v1/plugins/pick-dir', { method: 'POST' }),
diff --git a/app/static/js/services/runtime.js b/app/static/js/services/runtime.js
new file mode 100644
index 0000000..84a08a9
--- /dev/null
+++ b/app/static/js/services/runtime.js
@@ -0,0 +1,62 @@
+// SonicForge Runtime service — phát hiện môi trường chạy (desktop Windows /
+// docker headless) qua /api/v1/system/capabilities, bật/tắt tính năng theo đó.
+//   - data-runtime trên <html>: "desktop" | "headless"
+//   - data-carla="1": có Carla local (hiện nút "Mở trong Carla")
+//   - Phần tử có thuộc tính data-carla-only sẽ bị ẩn khi không có Carla local.
+//   - Thư viện preset (.vstpreset) cache trong SonicRuntime.presets — dùng cho
+//     dropdown gán preset vào track (Carla → pedalboard bridge).
+window.SonicRuntime = window.SonicRuntime || { loaded: false, capabilities: null, presets: null };
+
+(function () {
+    function getHeaders() {
+        const token = localStorage.getItem('sonic_token') || '';
+        return token ? { 'Authorization': 'Bearer ' + token } : {};
+    }
+
+    function load() {
+        return fetch(window.API_BASE_URL + '/api/v1/system/capabilities')
+            .then(function (r) { return r.json(); })
+            .then(function (data) {
+                var c = data && data.success ? data : { features: {} };
+                window.SonicRuntime.capabilities = c;
+                window.SonicRuntime.loaded = true;
+                var html = document.documentElement;
+                html.dataset.runtime = c.runtime || 'unknown';
+                html.dataset.platform = c.platform || '';
+                html.dataset.carla = (c.features && c.features.carla_local) ? '1' : '0';
+                if (c.features && c.features.carla_local === false) {
+                    document.querySelectorAll('[data-carla-only]').forEach(function (el) {
+                        el.style.display = 'none';
+                    });
+                }
+                // Cache sẵn danh sách preset (static, ít thay đổi)
+                listPresets().catch(function () {});
+                return c;
+            })
+            .catch(function () { return null; });
+    }
+
+    function listPresets() {
+        if (window.SonicRuntime.presets) return Promise.resolve(window.SonicRuntime.presets);
+        return fetch(window.API_BASE_URL + '/api/v1/presets', { headers: getHeaders() })
+            .then(function (r) { return r.json(); })
+            .then(function (d) {
+                window.SonicRuntime.presets = (d && d.presets) || [];
+                return window.SonicRuntime.presets;
+            })
+            .catch(function () { return []; });
+    }
+
+    window.SonicRuntime.load = load;
+    window.SonicRuntime.listPresets = listPresets;
+    window.SonicRuntime.refreshPresets = function () {
+        window.SonicRuntime.presets = null;
+        return window.SonicRuntime.listPresets();
+    };
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', load);
+    } else {
+        load();
+    }
+})();
diff --git a/app/templates/index.html b/app/templates/index.html
index 2800df8..f5ad180 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -31,6 +31,7 @@
     <script src="https://unpkg.com/react@18.3.1/umd/react.production.min.js"></script>
     <script src="https://unpkg.com/react-dom@18.3.1/umd/react-dom.production.min.js"></script>
     <script src="/static/js/services/fluidsynthLoader.js?v=202607271245"></script>
+    <script src="/static/js/services/runtime.js?v=20260809"></script>
     <script src="/static/js/services/api.js?v=202608091400"></script>
     <script src="/static/js/services/audioEngine.js?v=202607271016"></script>
     <script src="/static/js/services/storage.js?v=202608038200"></script>
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index e1ddff1..7acffea 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -11,6 +11,11 @@ services:
     ports:
       - "${WEB_PORT:-8000}:8000"
     env_file: .env
+    environment:
+      # Ép nhận diện headless (server docker + browser UI) — soundfont + VSTi
+      # mở được lấy từ storage mount bên dưới; preset VST3 (.vstpreset) upload
+      # qua web UI vào storage/presets (nằm trong volume sf_db).
+      - SF_DOCKER=1
     volumes:
       - sf_uploads:/app/app/storage/uploads
       - sf_processed:/app/app/storage/processed
diff --git a/md/52_CARLA_BRIDGE.md b/md/52_CARLA_BRIDGE.md
new file mode 100644
index 0000000..4cd9fba
--- /dev/null
+++ b/md/52_CARLA_BRIDGE.md
@@ -0,0 +1,222 @@
+# CARLA BRIDGE — NATIVE GUI VSTi (Windows) + DUAL-MODE RUNTIME (Desktop / Docker Headless)
+
+> Tài liệu kỹ thuật & vận hành: tích hợp Carla làm host native GUI cho VSTi trên
+> Windows, tự phát hiện môi trường (desktop / headless), thư viện preset
+> (.vstpreset) làm cầu nối Carla → pedalboard, và Plugin Manager quản lý
+> soundfont + instrument.
+>
+> Phạm vi code: `app/core/runtime.py`, `app/api/v1/system.py`,
+> `app/api/v1/presets.py`, `app/api/v1/plugins.py`, `app/core/vst_engine.py`,
+> `app/core/render_engine.py`, `app/static/js/services/runtime.js`, `app.jsx`.
+
+---
+
+## 1. Bối cảnh & quyết định kiến trúc
+
+| Vấn đề | Quyết định |
+|---|---|
+| `pedalboard` **cố tình headless** — không mở được native GUI VSTi | Không thay thế pedalboard; dùng **Carla làm host GUI ngoài** (preview + chỉnh preset), pedalboard giữ nguyên làm **render engine** (offline, cùng code path cho preview & export) |
+| Browser không chạy được binary `.vst3` (Windows/Linux) | Preview realtime thật chỉ có trong **cửa sổ Carla**; trong web UI dùng **quick-render preview** (pedalboard render clip ngắn → wav — **âm thật = âm export**) |
+| App chạy 2 môi trường: **Windows desktop** (server+client 1 máy) và **Docker headless** (server + browser UI) | **Runtime profile tự phát hiện** → bật/tắt tính năng theo môi trường (nút Carla Bridge chỉ hiện trên desktop có Carla) |
+| Carla Windows là **bộ zip portable** — không installer, không PATH | **User tự định vị** thư mục chứa `carla.exe` (Plugin Manager → Định vị Carla...) + tìm kiếm dự phòng (registry, Program Files, quét nông Downloads/Desktop) |
+
+```
+┌────────────────────────── Windows Desktop (1 máy) ──────────────────────────┐
+│  Browser/Tauri UI ──► FastAPI (localhost:8000) ──► pedalboard (render VST3) │
+│        │                        │                        ▲                  │
+│        ▼                        ▼                        │ load_preset      │
+│  Nút "Carla Bridge" ──► spawn carla.exe (native GUI)     │                  │
+│        │               chọn VSTi, chỉnh âm, Save .vstpreset                 │
+│        └──────────────► Upload preset ──► storage/presets ─┘                 │
+└─────────────────────────────────────────────────────────────────────────────┘
+┌────────────────────────── Docker Headless (server) ─────────────────────────┐
+│  Browser UI ──► FastAPI (container :8000) ──► pedalboard (VSTi Linux)       │
+│  Soundfont + VSTi mở được: mount volumes (docker-compose.prod.yml)          │
+│  Preset .vstpreset: user chỉnh ở máy desktop → upload qua web UI            │
+└─────────────────────────────────────────────────────────────────────────────┘
+```
+
+---
+
+## 2. Runtime tự phát hiện môi trường (`app/core/runtime.py`)
+
+### 2.1 Nguyên tắc
+
+- **Heuristic + override**: `SF_RUNTIME=auto|desktop|headless` **thắng tuyệt đối**
+  (WSL / docker-in-docker / remote desktop có thể làm heuristic sai).
+- `SF_DOCKER=1` hoặc tồn tại `/.dockerenv` → nhận diện container.
+- Linux: không có `DISPLAY` hoặc trong docker → `headless`; ngược lại `desktop`.
+- Windows/macOS → luôn `desktop`.
+
+### 2.2 Capabilities API (frontend gọi 1 lần lúc boot)
+
+```
+GET /api/v1/system/capabilities        (public — cần trước khi đăng nhập)
+```
+
+```json
+{
+  "success": true,
+  "runtime": "desktop",        // "desktop" | "headless"
+  "platform": "windows",       // "windows" | "linux" | "darwin"
+  "docker": false,
+  "features": {
+    "carla_local": true,       // có Carla trên máy → hiện nút "Carla Bridge"
+    "carla_path": "D:/Tools/Carla/carla.exe",
+    "preset_upload": true,     // luôn true (upload .vstpreset qua web UI)
+    "vst_render": true,        // pedalboard khả dụng
+    "tauri_bridge": false,
+    "preview_mode": "quick_render"   // "quick_render" | "wasm"
+  },
+  "default_dirs": { "vst": [...], "soundfont": [...], "preset": "..." }
+}
+```
+
+### 2.3 Bảng hành vi theo môi trường
+
+| Tính năng | Windows desktop | Docker headless |
+|---|---|---|
+| Render VSTi | pedalboard `VST3Plugin` + `load_preset` | giống hệt (VSTi **bản Linux**) |
+| Scan VST/SF | thư mục chuẩn Windows + `plugin_dirs.json` | mount volumes + `plugin_dirs.json` |
+| Preview VSTi | quick-render (âm thật); realtime trong Carla | quick-render |
+| Nút "Carla Bridge" (nút Synth) | **Hiện** → spawn `carla.exe` | **Ẩn** (không có GUI local) |
+| Preset | picker local / upload → thư viện | upload → thư viện |
+| SoundFont preview | FluidSynth WASM (browser) | giống hệt |
+
+---
+
+## 3. Cài đặt Carla trên Windows (bản portable zip)
+
+Carla phát hành dạng **zip** (`Carla-2.5.x-win64.zip`) — **không có installer,
+không ghi PATH**. Không bundle Carla vào installer của app (license GPL-2.0+,
+xem §8).
+
+1. Tải: <https://github.com/falkTX/Carla/releases> (bản `win64`).
+2. Giải nén ra bất kỳ đâu (VD `D:\Tools\Carla\`, chứa `carla.exe`).
+3. Mở app → **Plugin Manager** → section **"Carla Bridge (VSTi native GUI)"** →
+   nút **"Định vị Carla..."** → chọn thư mục chứa `carla.exe` (hoặc chính file
+   `carla.exe`).
+4. App lưu vào `storage/carla_path.json` → cache detect bị xóa → nút
+   **"Carla Bridge"** hiện trong dropdown nút Synth.
+
+### 3.1 Thứ tự phát hiện `carla_local`
+
+| Ưu tiên | Nguồn |
+|---|---|
+| 1 | **Config user** (`storage/carla_path.json`) — kênh chính cho bản portable |
+| 2 | PATH (`shutil.which`) |
+| 3 | Registry (`HKLM/HKCU\SOFTWARE\Carla\InstallPath`) — nếu cài qua installer |
+| 4 | Thư mục chuẩn (`Program Files\Carla`, `%LOCALAPPDATA%\Programs\Carla`) |
+| 5 | **Quét nông** Downloads/Desktop/Documents (độ sâu ≤ 3, bỏ qua `node_modules`, `AppData`, `Windows`...) — không bao giờ quét toàn ổ đĩa |
+
+```
+POST /api/v1/system/carla-path       (auth) — lưu vị trí Carla
+body: { "carla_path": "D:/Tools/Carla" }      (thư mục HOẶC file exe)
+→ trả { success, carla_path, ...capabilities }
+```
+
+---
+
+## 4. Luồng sử dụng end-to-end (Windows)
+
+1. **Nút Synth** (track strip / btnSynth) → chọn **"🎛 Carla Bridge (mở Carla.exe)"**
+   → app spawn `carla.exe` (ưu tiên `carla-single <plugin>` nếu chọn kèm plugin).
+2. Trong Carla: **Add Plugin** → chọn VSTi (Kontakt, Nexus, Vital...) → native GUI
+   hiện ra → chỉnh âm, chọn bank/preset của plugin.
+3. **Save preset** bằng nút của CHÍNH plugin (không dùng project save của Carla)
+   → file `.vstpreset`.
+4. Trong app: dropdown Synth → **"⬆ Upload preset (từ Carla...)"** → chọn file
+   `.vstpreset` → nằm trong **thư viện preset** → chọn preset trong danh sách
+   **"VST Presets"** → gán vào track (`synth_engine.preset_id`).
+5. **Render**: `render_engine.py` nạp plugin qua `load_vst()` rồi
+   `apply_preset_to_plugin()` → **âm render = âm đã chỉnh trong Carla**
+   (điều kiện: cùng sample rate — xem §7).
+
+Lưu ý: danh sách VSTi trong dropdown vẫn cần thiết — dùng để **map tên →
+đường dẫn khi pedalboard nạp plugin lúc render** (không phải để mở GUI).
+
+---
+
+## 5. Thư viện preset — cầu nối Carla ↔ pedalboard
+
+- Thư mục: `{STORAGE_DIR}/presets` (Windows: `%APPDATA%\SonicForgeDAW\storage\presets`;
+  Docker: nằm trong volume `sf_db` → `/app/app/storage/presets`).
+- Định dạng hỗ trợ: `.vstpreset` (VST3 — chuẩn), `.fxp`/`.fxb` (VST2, chỉ
+  preview trong Carla), `.dspreset` (DecentSampler/Pianobook).
+- `synth_engine` của track có thể chứa 1 trong 3 dạng (ưu tiên giảm dần):
+
+```json
+{ "type": "vst3", "plugin_id": "Kontakt 7",
+  "preset_data": "<base64 bytes .vstpreset nhúng — project tự chứa state, portable>",
+  "preset_id": "a1b2c3....vstpreset",      // thư viện storage/presets
+  "preset_path": "D:/presets/Piano.vstpreset" }
+```
+
+### API
+
+```
+GET    /api/v1/presets                        (public) — danh sách
+POST   /api/v1/presets/upload                 (auth)   — multipart file + plugin_hint
+GET    /api/v1/presets/{id}/download
+DELETE /api/v1/presets/{id}                   (auth)
+```
+
+### Quick-render preview (âm thật = âm export)
+
+```
+POST /api/v1/plugins/preview
+body: { instrument_id, notes:[{pitch,start_beat,duration_beats,velocity}],
+        bpm, sample_rate, preset_id?, preset_path?, preset_data? }
+→ { success, url: "/static/audio/processed/preview_xxx.wav", duration_sec }
+```
+
+Cùng code path với export (pedalboard + `load_preset`) → **preview nghe đúng
+plugin/preset** (khác "Preview Synth WASM" cũ — âm giả).
+
+---
+
+## 6. Plugin Manager — SoundFont: Add Directory → Scan → Instrument → Synth
+
+1. **Add Directory** (folder picker native / in-app browser) → thư mục vào
+   danh sách (lưu `plugin_dirs.json`).
+2. **Scan** → quét soundfont trong các thư mục (catalog qua
+   `SoundFontAutoScanner`) + liệt kê VST.
+3. Bấm vào **một soundfont** (▸) → expand danh sách **instrument bên trong**
+   (Bank/Program/Tên) qua `GET /api/v1/plugins/soundfont-instruments/{sf_id}`.
+4. Nút **"Chèn vào Synth"** → gán instrument (bank/program) vào **track đang
+   chọn** (`setTrackInstrumentWithProgram`) và đóng Plugin Manager.
+
+> SF3: instrument đọc sau khi chuyển đổi SF3→SF2 (endpoint download tự chuyển
+> đổi khi cần). Nếu thiếu libfluidsynth, danh sách trả `[]` (graceful).
+
+---
+
+## 7. Lưu ý kỹ thuật & hạn chế (đã xác minh)
+
+1. **Sample rate**: Carla chạy theo audio device (thường 48 kHz), pedalboard
+   render mặc định 44.1 kHz → plugin phụ thuộc SR (delay/chorus/oversampling)
+   nghe khác. **Render đúng SR của thiết bị Carla** để preview = export.
+2. **VST2**: pedalboard 0.10+ **đã gỡ hỗ trợ VST2** (chỉ còn VST3) → chỉ preset
+   VST3 (`.vstpreset`) round-trip được. Plugin VST2 cũ: preview được trong
+   Carla nhưng **không render** được qua pedalboard.
+3. **VSTi trên Docker**: chỉ chạy được plugin có bản **Linux** (`.vst3`/`.so`);
+   plugin Windows-only (`.dll`) không chạy trên server Linux (không khuyến nghị
+   Wine bridge trong container).
+4. **License Carla GPL-2.0+**: app **không bundle/nhúng** Carla — chỉ spawn
+   tiến trình ngoài + trao đổi file preset (không link code) → không dính
+   copyleft. User tự tải zip.
+5. **Preview WASM ≠ âm thật**: Preview Synth trong browser không phải plugin
+   thật — dùng quick-render (`/plugins/preview`) nếu cần nghe đúng âm.
+
+---
+
+## 8. Checklist QA
+
+- [ ] Windows: cài Carla zip → Định vị Carla → nút "Carla Bridge" hiện ở nút Synth
+- [ ] Bấm Carla Bridge → `carla.exe` chạy, mở được VSTi + native GUI
+- [ ] Save `.vstpreset` từ GUI plugin → Upload trong app → gán vào track → render ra âm đúng preset
+- [ ] Render cùng SR với Carla → preview (Carla) nghe = âm export
+- [ ] Plugin Manager: Add Directory → Scan → expand soundfont → "Chèn vào Synth" gán đúng bank/program vào track đang chọn
+- [ ] Docker (`SF_DOCKER=1`): capabilities `runtime=headless`, không hiện Carla Bridge, preset upload hoạt động, render VSTi Linux + soundfont từ mount OK
+- [ ] `SF_RUNTIME=desktop` trên Linux có DISPLAY → chạy như desktop
+- [ ] pytest: `86 passed, 7 skipped`
diff --git a/wiki.md b/wiki.md
index bbd655d..2925f7d 100644
--- a/wiki.md
+++ b/wiki.md
@@ -3031,3 +3031,8 @@
 - **FIX (app.jsx effect follow):** `const playing = isPlaying || !!st.isPlaying` — follow khi piano roll play LẪN main play; deps thêm `st.isPlaying`.
 - **Các file ảnh hưởng:** `app/static/js/app.jsx`, `app/templates/index.html` (?v=202608070950), `wiki.md`. Rebuild precompiled (build PASS).
 - **Ghi chú/Test:** hard refresh → PIANO ROLL → play (tab) → playhead ở giữa + notes trôi trái; stop → về đầu.
+
+### [2026-08-09] Task: Carla Bridge (native GUI VSTi) + dual-mode runtime + preset library
+- **Tóm tắt thay đổi:** (1) Runtime tự phát hiện môi trường `app/core/runtime.py` (desktop Windows / docker headless; override `SF_RUNTIME`/`SF_DOCKER`) + `GET /api/v1/system/capabilities` (public) — frontend bật/tắt tính năng theo môi trường. (2) Carla Bridge: mục "🎛 Carla Bridge (mở Carla.exe)" trong dropdown nút Synth (chỉ hiện khi desktop + có Carla local) → spawn `carla.exe` qua `POST /api/v1/plugins/open-in-carla`; vì bản Windows là zip portable (không installer, không PATH) → Plugin Manager thêm section "Carla Bridge" + nút "Định vị Carla..." (`POST /api/v1/system/carla-path`, lưu `storage/carla_path.json` ưu tiên cao nhất; kèm registry + quét nông Downloads/Desktop/Documents giới hạn độ sâu). (3) Thư viện preset `app/api/v1/presets.py` (storage/presets: list/upload/download/delete, chống path traversal) + `apply_preset_to_plugin()` trong `vst_engine.py` (preset_data base64 → preset_id → preset_path) → render_engine nạp preset trước khi render VST3 → âm render = âm đã chỉnh trong Carla. (4) `POST /api/v1/plugins/preview` — quick-render preview (cùng code path pedalboard với export → âm thật). (5) Plugin Manager: bấm soundfont expand → liệt kê instrument (bank/program/name) + nút "Chèn vào Synth" gán vào track đang chọn. (6) `config.py` default VST_DIR/SOUNDFONT_DIR theo platform + `PRESET_DIR`; docker-compose `SF_DOCKER=1`; service `runtime.js` (capabilities lúc boot, cache preset) + api.js methods mới (getCapabilities/setCarlaPath/openInCarla/previewInstrument/listPresets/uploadPreset/deletePreset).
+- **Các file ảnh hưởng:** `app/core/runtime.py` (mới), `app/api/v1/system.py` (mới), `app/api/v1/presets.py` (mới), `app/api/v1/plugins.py`, `app/core/vst_engine.py`, `app/core/render_engine.py`, `app/config.py`, `app/main.py`, `app/static/js/services/runtime.js` (mới), `app/static/js/services/api.js`, `app/static/js/app.jsx`, `app/static/js/app.precompiled.js` (rebuild), `app/templates/index.html`, `.env.example`, `docker-compose.prod.yml`, `md/52_CARLA_BRIDGE.md` (mới), `wiki.md`
+- **Ghi chú/Test (nếu có):** `pytest`: 86 passed, 7 skipped. Test API: capabilities 200; preset CRUD + chặn path traversal; carla-path (thư mục/exe → resolve exe, invalid → 400); open-in-carla → 409 kèm hướng dẫn khi chưa có Carla; preview → 501 khi thiếu pedalboard. Rebuild bundle BUILD OK. Lưu ý: pedalboard 0.10+ đã bỏ VST2 (chỉ preset VST3 `.vstpreset` round-trip); render cùng sample rate với Carla để preview = export; Carla GPL-2.0+ → không bundle/nhúng, chỉ spawn tiến trình ngoài.