printedparts kiosk: show gage lab tag (not item code) on the SSO prompt

The badge step card still showed the internal item code; show the gage lab tag
(fallback to item code) to match the label and list. The take still posts the
item code as the stable identifier.

plugins/printedparts/frontend/views/PartsKiosk.vue

@@ -39,7 +39,7 @@
         <img v-if="item.imageurl" :src="withBase(item.imageurl)" class="item-photo" />
         <div>
           <h2>{{ item.itemname }}</h2>
-          <p class="kiosk-hint">{{ item.itemcode }} - {{ item.quantityonhand }} on hand</p>
+          <p class="kiosk-hint">{{ item.gagelabtag || item.itemcode }} - {{ item.quantityonhand }} on hand</p>
         </div>
       </div>
       <p class="kiosk-prompt">Scan your badge or tap in your SSO</p>