From a900ed275518dab52406f0373399ed72bf64db41 Mon Sep 17 00:00:00 2001
From: marco370 <48531002-marco370@users.noreply.replit.com>
Date: Fri, 17 Oct 2025 08:46:14 +0000
Subject: [PATCH] Improve vehicle creation by handling unassigned guards
 correctly

Update vehicle creation API to correctly map "unassigned" guard values to null, and adjust the UI SelectItems to use "unassigned" string value.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 42d8028a-fa71-4ec2-938c-e43eedf7df01
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/6d543d2c-20b9-4ea6-93fe-70fe9b1d9f80/42d8028a-fa71-4ec2-938c-e43eedf7df01/B8lcojv