fix GUI VSTi trắng/không load: DPI per-monitor v2 + WS_CLIPCHILDREN + view->onSize() sau attached; restore API manager header/cpp (2596372 xoá nhầm) và deploy exe mới

native_bridge/src/main.cpp

@@ -222,7 +222,7 @@ static void* create_native_vst_window(const char* title) {
         registered = true;
     }
     HWND hwnd = CreateWindowExA(0, kWndClass, title ? title : "VST",
-                                WS_OVERLAPPEDWINDOW | WS_VISIBLE,
+                                WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
                                 CW_USEDEFAULT, CW_USEDEFAULT, 800, 600,
                                 nullptr, nullptr, GetModuleHandleA(nullptr), nullptr);
     return (void*)hwnd;
@@ -672,6 +672,12 @@ static void post_close_gui(uint32_t ch, HWND hwnd) {
 int main(int argc, char* argv[]) {
     std::cout << "[NativeBridge] Starting DAW Host Bridge Engine..." << std::endl;
 #ifdef _WIN32
+    // DPI: declare per-monitor v2 FIRST (before any window is created).
+    // Without it, on scaled displays (125/150%) the plugin's own renderer
+    // paints at 100% into an OS-scaled window -> blank/white panel with dark
+    // strips (reported "GUI trắng, không load"). Runtime call works even
+    // without an exe manifest. Ignore failure (already aware).
+    SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
     // Default IMC = none on the main thread (IME recursion fix).
     ImmAssociateContextEx(nullptr, nullptr, IACE_DEFAULT);
     // Catch JUCE_* window creation and strip its IMC at birth. Global hooks