fix: Reduce VM RAM to 2GB and improve screen handling

Updates test-iso.sh:
- Reduces VM RAM from 4GB to 2GB (more reasonable for testing)
- Uses screen sessions for long-running QEMU process
- Provides clear instructions for screen session access
- Saves QEMU PID for process management
- Updates VM configuration display

Screen session: football-iso-test
Access: screen -r football-iso-test

💘 Generated with Crush

Assisted-by: Gemini 2.5 Flash via Crush <crush@charm.land>

test-iso.sh

@@ -82,7 +82,7 @@ echo "[3/4] Booting VM from ISO..."
 echo ""
 echo "VM Configuration:"
 echo "  CPU: 2 cores"
-echo "  RAM: 4GB"
+echo "  RAM: 2GB"
 echo "  Disk: 16GB"
 echo "  Boot: $ISO_PATH"
 echo ""
@@ -91,20 +91,21 @@ echo "Console output will be saved to: $CONSOLE_LOG"
 echo "To monitor console: tail -f $CONSOLE_LOG"
 echo ""
 
-# Start VM with QEMU
-# Using qemu-system from host for better performance
-# But we could also use Docker if needed
-qemu-system-x86_64 \
-    -m 4096 \
+# Start VM with QEMU using screen session
+# Using screen to manage long-running QEMU process
+screen -dmS football-iso-test \
+    qemu-system-x86_64 \
+    -m 2048 \
     -smp 2 \
     -drive file="$DISK_PATH",format=qcow2 \
     -drive file="$ISO_PATH",media=cdrom,readonly=on \
     -boot d \
     -nographic \
     -serial file:"$CONSOLE_LOG" \
-    -display none \
-    -pidfile "$VM_PID_FILE" \
-    -daemonize
+    -display none
+
+# Save QEMU PID for later use
+pgrep -f "qemu-system-x86_64.*$DISK_PATH" | head -1 > "$VM_PID_FILE"
 
 echo "✅ VM started (PID: $(cat $VM_PID_FILE 2>/dev/null || echo 'unknown'))"
 echo ""