fix: Short VIN Storage - Issue #1

frontend/src/features/vehicles/components/VehicleForm.tsx

@@ -13,7 +13,7 @@ import { VehicleImageUpload } from './VehicleImageUpload';
 
 const vehicleSchema = z
   .object({
-    vin: z.string().nullable().optional().transform(val => val ?? undefined),
+    vin: z.string().max(17).nullable().optional().transform(val => val ?? undefined),
     year: z.number().min(1950).max(new Date().getFullYear() + 1).nullable().optional(),
     make: z.string().nullable().optional(),
     model: z.string().nullable().optional(),
@@ -30,11 +30,13 @@ const vehicleSchema = z
   .refine(
     (data) => {
       // Pre-1981 vehicles have no VIN/plate requirement
-      if (data.year && data.year < 1981) return true;
+      if (data.year && data.year < 1981) {
+        return true;
+      }
 
       const vin = (data.vin || '').trim();
       const plate = (data.licensePlate || '').trim();
-      // Must have either a valid 17-char VIN or a non-empty license plate
+      // 1981+: Must have either a valid 17-char VIN or a non-empty license plate
       if (vin.length === 17) return true;
       if (plate.length > 0) return true;
       return false;
@@ -46,12 +48,16 @@ const vehicleSchema = z
   )
   .refine(
     (data) => {
-      // Pre-1981 vehicles have no VIN format requirement
-      if (data.year && data.year < 1981) return true;
+      // Pre-1981 vehicles accept any length VIN (1-17 chars)
+      if (data.year && data.year < 1981) {
+        const vin = (data.vin || '').trim();
+        // Empty is fine, or any length up to 17
+        return vin.length === 0 || (vin.length >= 1 && vin.length <= 17);
+      }
 
       const vin = (data.vin || '').trim();
       const plate = (data.licensePlate || '').trim();
-      // If VIN provided but not 17 and no plate, fail; if plate exists, allow any VIN (or empty)
+      // 1981+: If plate exists, allow any VIN (or empty); otherwise VIN must be exactly 17 or empty
       if (plate.length > 0) return true;
       return vin.length === 17 || vin.length === 0;
     },

frontend/src/features/vehicles/types/vehicles.types.ts

@@ -41,6 +41,8 @@ export interface CreateVehicleRequest {
 }
 
 export interface UpdateVehicleRequest {
+  vin?: string;
+  year?: number;
   make?: string;
   model?: string;
   engine?: string;