fix(setup): handle OS-specific venv activation path

- Support both Windows and Linux/macOS venv activation
  - Use `.venv/Scripts/activate` for Windows
  - Use `.venv/bin/activate` for Linux/macOS

computer-use-demo/setup.sh

@@ -14,8 +14,16 @@ if ! command -v cargo &> /dev/null; then
     exit 1
 fi
 
+# Create virtual environment
 python3 -m venv .venv
-source .venv/bin/activate
+
+# Use the appropriate activation script for the OS
+if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "win32" ]]; then
+    source .venv/Scripts/activate  # Windows activation path
+else
+    source .venv/bin/activate  # Linux/macOS activation path
+fi
+
 pip install --upgrade pip
 pip install -r dev-requirements.txt
 pre-commit install