V45.43: fix Ozone 11 GUI crash on Intel UHD 630 + load diagnostics

Root-cause hypothesis: fx_vst_bridge parked embed window offscreen (-20000,-20000)
during VST3 editor attach; Ozone 11 GL init null-derefs (c0000005 in
iZOzone11Core.dll+18f6b92) on Intel ICD. Reaper hosts window on-screen -> OK.

- RenderFxJob.cpp: env toggle SF_FXGUI_ATTACH_ONSCREEN=1 -> SetWindowPos(100,100)
  before fxGuiLoadAttach, park back offscreen after attach succeeds
- main_fx.cpp: FxCrashDumpHandler prints [CRASH] in <module>+0x<offset> and
  [CRASH] minidump: <path> so logs name the faulting plugin DLL directly
- app.jsx VstGuiEmbed: frameLoadedRef + 90s watchdog -> onDead if bridge alive
  but no frame (no more infinite 'Dang tai plugin VST...' flash); clearer onDead
  toasts with %TEMP%\sf_dumps\fx_bridge_crash_*.dmp hint (track + master)
- rebuild fx_vst_bridge + daw_vst_bridge, NSIS/MSI v=202609021809

app/static/js/app.jsx

@@ -13382,11 +13382,13 @@ const ExportProgressModal = ({ open, exportProgress, isExporting, onClose }) =>
     const screenRectRef = React.useRef(null);
     const [, setDead] = React.useState(false);
     const [frameLoaded, setFrameLoaded] = React.useState(false);
+    const frameLoadedRef = React.useRef(false);
     const post = (payload) => { try { fetch(url + '/input', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(payload) }).catch(() => {}); } catch (e) {} };
     React.useEffect(() => {
       deadRef.current = false;
       setDead(false);
       setFrameLoaded(false);
+      frameLoadedRef.current = false;
       const tick = setInterval(() => {
         const img = imgRef.current;
         if (!img || deadRef.current) return;
@@ -13407,8 +13409,16 @@ const ExportProgressModal = ({ open, exportProgress, isExporting, onClose }) =>
       // re-shows the native window at its last position, and the ~500ms
       // rect refresh below re-anchors it over the panel.
       try { fetch(url + '/show', { method: 'POST' }).catch(() => {}); } catch (e) {}
+      // Watchdog: plugin load is allowed up to 90s; if no frame arrived and
+      // the bridge did not die (ping alive = process stuck in plugin init/attach),
+      // give up so the panel does not flash "Đang tải plugin VST..." forever.
+      const watchdog = setTimeout(() => {
+        if (!deadRef.current && !frameLoadedRef.current) {
+          deadRef.current = true; setDead(true); onDead && onDead();
+        }
+      }, 90000);
       return () => {
-        clearInterval(tick); clearInterval(ping); preloadRef.current = null;
+        clearInterval(tick); clearInterval(ping); clearTimeout(watchdog); preloadRef.current = null;
         // Panel closed -> hide the native window (bridge stays alive so
         // reopening is fast); POST /hide chứ không /close.
         try { fetch(url + '/hide', { method: 'POST' }).catch(() => {}); } catch (e) {}
@@ -13486,7 +13496,7 @@ const ExportProgressModal = ({ open, exportProgress, isExporting, onClose }) =>
               <span className="text-[11px] text-slate-500 font-mono animate-pulse">Đang tải plugin VST — GUI embed sẽ hiện khi plugin sẵn sàng...</span>
             </div>
           )}
-          <img ref={imgRef} alt="VST GUI" className="w-full h-full object-contain select-none pointer-events-none" draggable={false} onLoad={() => setFrameLoaded(true)} />
+          <img ref={imgRef} alt="VST GUI" className="w-full h-full object-contain select-none pointer-events-none" draggable={false} onLoad={() => { setFrameLoaded(true); frameLoadedRef.current = true; }} />
         </div>
       </div>
     );
@@ -14019,7 +14029,7 @@ const addVst = (path) => { const fx = (fxList || []).find(f => f.path === path);
         {fxGuiOpen ? (
           <div className="flex-1 min-h-0">
             <VstGuiEmbed url={fxGuiOpen.url} onClose={closeFxGui}
-              onDead={() => { window.showToast && window.showToast('Bridge VST GUI đã mất kết nối — trả về graph', 'error'); closeFxGui(); }} />
+              onDead={() => { window.showToast && window.showToast('Plugin VST GUI lỗi khi mở (bridge chết/treo — check %TEMP%\\sf_dumps\\fx_bridge_crash_*.dmp) — đã trả về graph', 'error'); closeFxGui(); }} />
           </div>
         ) : (
         <>
@@ -15097,7 +15107,7 @@ const addMasterVst = (path) => { const fx = (masterFxList || []).find(f => f.pat
           {masterGuiOpen ? (
             <div className="flex-1 flex flex-col bg-slate-950 relative min-h-0">
               <VstGuiEmbed url={masterGuiOpen.url} onClose={closeMasterGui}
-                onDead={() => { window.showToast && window.showToast('Bridge VST GUI đã mất kết nối — trả về graph', 'error'); closeMasterGui(); }} />
+                onDead={() => { window.showToast && window.showToast('Plugin VST GUI lỗi khi mở (bridge chết/treo — check %TEMP%\\sf_dumps\\fx_bridge_crash_*.dmp) — đã trả về graph', 'error'); closeMasterGui(); }} />
             </div>
           ) : (
           <div className="flex-1 flex flex-col bg-slate-950 relative overflow-y-auto oz-scrollbar">

app/templates/index.html

@@ -51,7 +51,7 @@
     <script src="/static/js/services/promptTemplateManager.js?v=202608290945"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202608290945"></script>
     <script src="/static/js/services/chordTheory.js?v=202608290945"></script>
-    <script src="/static/js/app.precompiled.js?v=202609021810" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202609022050" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202608290945">
     <style>
         :root {

native_bridge/src/RenderFxJob.cpp

@@ -1906,9 +1906,23 @@ int run_fx_gui_server(const std::string& jobPath) {
     fxGuiShmSetName(shm);  // EARLY — frontend may /shm push before load finishes
 
     int loadRc = 0;
+    const bool attachOnscreen = std::getenv("SF_FXGUI_ATTACH_ONSCREEN") != nullptr;
     const int srv = fxGuiServerLoop(hwnd, [&]() {
+        // Some plugin GL editors (e.g. iZotope Ozone 11 on Intel UHD 630) crash
+        // when their editor window is parked offscreen during attach. Env toggle
+        // SF_FXGUI_ATTACH_ONSCREEN=1: show the window on-screen first, then park
+        // it back once the editor attached. Visible for one frame max (feeder is
+        // started only after attach succeeds).
+        if (attachOnscreen)
+            SetWindowPos(hwnd, nullptr, 100, 100, 0, 0,
+                         SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
         loadRc = fxGuiLoadAttach(&fx, path, name, hwnd, presetB64);
-        if (loadRc == 0) fxGuiStartFeederThread(&fx, hwnd);  // after load+attach only
+        if (loadRc == 0) {
+            fxGuiStartFeederThread(&fx, hwnd);  // after load+attach only
+            if (attachOnscreen)
+                SetWindowPos(hwnd, nullptr, -20000, -20000, 0, 0,
+                             SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE);
+        }
         if (loadRc != 0) PostMessageA(hwnd, WM_CLOSE, 0, 0);  // exit; port already printed
     });
     RemovePropA(hwnd, "FXGUI_FX");

native_bridge/src/main_fx.cpp

@@ -35,6 +35,18 @@ static LONG WINAPI FxCrashDumpHandler(EXCEPTION_POINTERS* ep) {
     std::cerr << "[CRASH] fx_vst_bridge exception code=0x" << std::hex
               << (er ? er->ExceptionCode : 0) << " addr=0x"
               << (er ? (void*)er->ExceptionAddress : nullptr) << std::dec << std::endl;
+    if (er) {
+        HMODULE hMod = nullptr;
+        DWORD_PTR crashAddr = (DWORD_PTR)er->ExceptionAddress;
+        if (GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
+                                   GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+                               (LPCSTR)er->ExceptionAddress, &hMod) && hMod) {
+            char modPath[MAX_PATH];
+            if (GetModuleFileNameA(hMod, modPath, MAX_PATH))
+                std::cerr << "[CRASH] in " << modPath << "+0x" << std::hex
+                          << (crashAddr - (DWORD_PTR)hMod) << std::dec << std::endl;
+        }
+    }
     char dumpDir[MAX_PATH];
     if (GetTempPathA(MAX_PATH, dumpDir)) {
         std::strncat(dumpDir, "sf_dumps", MAX_PATH - std::strlen(dumpDir) - 1);
@@ -63,6 +75,7 @@ static LONG WINAPI FxCrashDumpHandler(EXCEPTION_POINTERS* ep) {
                                        hFile, MiniDumpNormal, &mei, nullptr,
                                        nullptr);
                     CloseHandle(hFile);
+                    std::cerr << "[CRASH] minidump: " << dumpPath << std::endl;
                 }
             }
         }