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

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;
                 }
             }
         }