Add virtual environment activation support to launch script

launch_qt.sh

@@ -5,6 +5,12 @@ echo "🎧 TechDJ PyQt5 - Native DJ Application"
 echo "========================================"
 echo ""
 
+# Activate virtual environment if it exists
+if [ -f "./venv/bin/activate" ]; then
+    echo "🔧 Activating virtual environment..."
+    source ./venv/bin/activate
+fi
+
 # Check if Python is installed
 if ! command -v python3 &> /dev/null; then
     echo "❌ Python 3 is not installed!"