fix: nut Synth tren TCP khong hien danh sach VSTi da scan (ban 1.1.5)

- Nut Synth TCP goi openInstrumentSelector (modal 'Select Instrument')
  nhung modal chi co category SoundFont + GM - khong co muc VST (muc VST
  chi ton tai o dropdown MixerStrip). Them 'VST Instruments' vao sidebar
  trai modal: list instrumentSelectorData.vst_instruments (listPlugins),
  click -> setTrackInstrumentWithUndo(trackId, v.id, v.name) + dong modal.
- _scan_vst_in_dirs + /scan: phat hien ca FOLDER ten X.vst3 (Windows VST3
  = folder chua X.vst3.dll) - truoc day chi scan file.
- Ghi chu: pedalboard (engine VST) la headless - KHONG mo duoc GUI goc cua
  plugin; danh sach + chon la co che chon nhac cu kha thi.

Verify engine frozen: /plugins/available tra ['PadMachine','UltraSynth']
(ca file va folder .vst3); /scan dong bo; test_plugin_api 3 passed.

app/api/v1/plugins.py

@@ -111,7 +111,14 @@ async def scan_plugin_dirs(background_tasks: BackgroundTasks = None,
     for d in plugin_dirs:
         if not os.path.isdir(d):
             continue
-        for root, _dirs, files in os.walk(d):
+        for root, dirs, files in os.walk(d):
+            # Windows: VST3 là FOLDER tên X.vst3 (chứa X.vst3.dll bên trong)
+            for sub in list(dirs):
+                if sub.lower().endswith(".vst3"):
+                    vst_found.append({"name": os.path.splitext(sub)[0],
+                                      "path": os.path.join(root, sub),
+                                      "dir": d,
+                                      "type": "VST3"})
             for f in files:
                 low = f.lower()
                 if low.endswith(".vst3") or low.endswith(".dll") or low.endswith(".so"):
@@ -170,12 +177,22 @@ async def list_plugins(current_user: dict = Depends(get_current_user)):
 
 def _scan_vst_in_dirs(dirs: list) -> list:
     """Walk các thư mục (plugin_dirs user) → danh sách VST giống /scan:
-    file .vst3/.dll/.so (VST3 folder Windows = .vst3.dll bên trong)."""
+    file .vst3/.dll/.so + FOLDER tên X.vst3 (Windows VST3 = folder chứa
+    X.vst3.dll bên trong)."""
     found = {}
     for d in dirs:
         if not d or not os.path.isdir(d):
             continue
-        for root, _dirs, files in os.walk(d):
+        for root, dirs, files in os.walk(d):
+            # Windows: VST3 là FOLDER tên X.vst3
+            for sub in list(dirs):
+                if sub.lower().endswith(".vst3"):
+                    name = os.path.splitext(sub)[0]
+                    if name not in found:
+                        found[name] = {
+                            "id": name, "name": name, "type": "VST3",
+                            "path": os.path.join(root, sub),
+                        }
             for f in files:
                 low = f.lower()
                 if low.endswith(".vst3") or low.endswith(".dll") or low.endswith(".so"):

app/static/js/app.jsx

@@ -29876,7 +29876,14 @@ STRICT CONSTRAINTS:
               },
               className: "w-full text-left px-3 py-2 text-sm rounded " + (selectedSoundFontId === sfId ? "bg-amber-700 text-white" : "bg-zinc-800 hover:bg-zinc-700 text-zinc-300")
             }, sfName);
-          })
+          }),
+          // ── VST Instruments (scanned bởi Plugin Manager) ──
+          (instrumentSelectorData?.vst_instruments?.length > 0) && /*#__PURE__*/React.createElement("div", { className: "mt-3 text-[10px] text-zinc-500 uppercase font-bold px-1 flex items-center gap-1" }, /*#__PURE__*/React.createElement("i", { "data-lucide": "cpu", className: "w-3 h-3 text-violet-400" }), "VST Instruments"),
+          (instrumentSelectorData?.vst_instruments || []).map(v => /*#__PURE__*/React.createElement("button", {
+            key: 'vst_modal_' + (v.id || v.name),
+            onClick: () => { setTrackInstrumentWithUndo(instrumentSelectorTrackId, v.id, v.name || v.id); closeInstrumentSelector(); },
+            className: "w-full text-left px-3 py-2 text-sm rounded bg-zinc-800 hover:bg-violet-800 text-zinc-300 flex items-center justify-between gap-2"
+          }, /*#__PURE__*/React.createElement("span", { className: "truncate" }, v.name || v.id), /*#__PURE__*/React.createElement("span", { className: "text-[9px] text-cyan-400 shrink-0" }, v.type || "VST")))
         ),
         /*#__PURE__*/React.createElement("div", { className: "flex-1 overflow-y-auto space-y-0.5" },
           /*#__PURE__*/React.createElement("button", {

app/storage/plugin_dirs.json

@@ -0,0 +1 @@
+{"plugin_dirs": ["/tmp/tmpuosmaps4"]}

app/templates/index.html

@@ -31,7 +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/api.js?v=202608091300"></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>
     <script src="/static/js/services/soundfontStorage.js?v=202607271016"></script>
@@ -43,7 +43,7 @@
     <script src="/static/js/services/midiExtractor.js?v=202607281052"></script>
     <script src="/static/js/services/promptTemplateManager.js?v=202607281039"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202607290941"></script>
-    <script src="/static/js/app.precompiled.js?v=202608091300" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608091400" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {