T16: autosample VST2 via native bridge + SF2/SF3 export hoàn chỉnh, UI chip size/note_count, re-sample on preset change, tests

app/api/v1/plugins.py

@@ -1144,17 +1144,22 @@ async def autosample_vsti(req: AutosampleRequest, current_user: dict = Depends(g
     Tra sf_id (bare uuid) de client tai SF2 va phat qua SonicSF nhu soundfont
     thuong. Chi phi autosample mot lan -> cache o client (localStorage)."""
     enforce_password_changed(current_user)
-    if not HAS_PEDALBOARD:
-        raise HTTPException(status_code=501, detail="pedalboard khong kha dung tren may nay")
+    _dirs = _effective_dirs().get("plugin_dirs") or []
 
     # tools/ nam ngoai package app - import voi fallback path
     try:
-        from tools.autosample_vsti import autosample_sf2 as _autosample_sf2
+        from tools.autosample_vsti import autosample_sf2 as _autosample_sf2, _is_vst2_path
     except ImportError:
         _root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
         if _root not in sys.path:
             sys.path.insert(0, _root)
-        from tools.autosample_vsti import autosample_sf2 as _autosample_sf2
+        from tools.autosample_vsti import autosample_sf2 as _autosample_sf2, _is_vst2_path
+
+    if not HAS_PEDALBOARD:
+        # VST2 native bridge khong can pedalboard — chi chan khi plugin la VST3
+        _p = PluginManager(extra_vst_dirs=_dirs)._scan_plugins().get(req.instrument_id)
+        if not _p or not _is_vst2_path(_p):
+            raise HTTPException(status_code=501, detail="pedalboard khong kha dung tren may nay")
 
     file_uuid = str(uuid.uuid4())
     dest_path = os.path.join(UPLOAD_SF_DIR, file_uuid + ".sf2")
@@ -1174,6 +1179,7 @@ async def autosample_vsti(req: AutosampleRequest, current_user: dict = Depends(g
             duration=req.duration, release=req.release,
             velocity=req.velocity, sample_rate=req.sample_rate,
             log=_log,
+            extra_vst_dirs=_dirs,
         )
     except FileNotFoundError as e:
         raise HTTPException(status_code=404, detail=str(e))