@mytec: iter3.7.0 start, gpu calc int

installer/build-win.sh

@@ -3,6 +3,7 @@ set -e
 
 echo "========================================="
 echo "  RFCP Desktop Build (Windows)"
+echo "  GPU-enabled ONEDIR build"
 echo "========================================="
 
 cd "$(dirname "$0")/.."
@@ -14,15 +15,30 @@ npm ci
 npm run build
 cd ..
 
-# 2. Build backend with PyInstaller
-echo "[2/4] Building backend..."
+# 2. Build backend with PyInstaller (GPU ONEDIR mode)
+echo "[2/4] Building backend (GPU)..."
 cd backend
+
+# Check CuPy is available
+if ! python -c "import cupy" 2>/dev/null; then
+    echo "WARNING: CuPy not installed - GPU acceleration will not be available"
+    echo "  Install with: pip install cupy-cuda13x"
+fi
+
 python -m pip install -r requirements.txt
 python -m pip install pyinstaller
-cd ../installer
-python -m PyInstaller rfcp-server.spec --clean --noconfirm
+
+# Build using GPU spec (ONEDIR output)
+python -m PyInstaller ../installer/rfcp-server-gpu.spec --clean --noconfirm
+
+# Copy ONEDIR folder to desktop staging area
+# Result: desktop/backend-dist/win/rfcp-server/rfcp-server.exe + _internal/
 mkdir -p ../desktop/backend-dist/win
-cp dist/rfcp-server.exe ../desktop/backend-dist/win/
+rm -rf ../desktop/backend-dist/win/rfcp-server  # Clean old build
+cp -r dist/rfcp-server ../desktop/backend-dist/win/rfcp-server
+
+echo "  Backend copied to: desktop/backend-dist/win/rfcp-server/"
+ls -la ../desktop/backend-dist/win/rfcp-server/*.exe 2>/dev/null || true
 cd ..
 
 # 3. Build Electron app