Refactor wagon specifications to rely on wagon type; remove tare weight and max payload from wagon entity and related components

apps/edr-freight-web/backoffice/src/pages/fleet/FleetCrudPages.tsx

@@ -107,6 +107,10 @@ const normalizePayload = (values: Record<string, FormValue>) =>
       .filter(([, value]) => value !== '' && !(Array.isArray(value) && value.length === 0)),
   );
 
+/** Render a spec value inherited from the wagon type; em dash when the type isn't loaded. */
+const fmtTypeSpec = (value: number | undefined | null, unit: string) =>
+  value == null ? '—' : `${Number(value)} ${unit}`;
+
 const extractBackendErrors = (error: unknown) => {
   const responseData = (error as { response?: { data?: unknown } })?.response?.data;
   const data = responseData && typeof responseData === 'object' ? responseData as Record<string, unknown> : undefined;
@@ -922,7 +926,17 @@ export function WagonsCrudPage() {
               ? `${wagon.currentLocationYard.label ?? wagon.currentLocationYard.code} (${wagon.currentLocationYard.country ?? '-'})`
               : '-',
         },
-        { key: 'maxPayloadWeight', label: 'Max payload' },
+        {
+          // Read-only: the spec lives on the wagon type, so it is displayed, never edited here.
+          key: 'tareWeight',
+          label: 'Tare weight',
+          render: (wagon) => fmtTypeSpec(wagon.wagonType?.tareWeightTons, 't'),
+        },
+        {
+          key: 'maxPayloadWeight',
+          label: 'Max payload',
+          render: (wagon) => fmtTypeSpec(wagon.wagonType?.capacityTons, 't'),
+        },
         { key: 'status', label: 'Status', render: (wagon) => statusBadge(wagon.status) },
       ]}
       fields={[
@@ -933,11 +947,6 @@ export function WagonsCrudPage() {
           type: 'select',
           required: true,
           options: wagonTypeOptions,
-          onValueChange: (value, current) => {
-            const selectedType = wagonTypes.find((type: any) => type.id === value);
-            if (!selectedType || Number(current.maxPayloadWeight) > 0) return {};
-            return { maxPayloadWeight: Number(selectedType.capacityTons) };
-          },
         },
         {
           key: 'currentLocationYardId',
@@ -946,8 +955,6 @@ export function WagonsCrudPage() {
           required: true,
           options: yardOptions,
         },
-        { key: 'tareWeight', label: 'Tare weight', type: 'number', required: true },
-        { key: 'maxPayloadWeight', label: 'Max payload weight', type: 'number', required: true },
         {
           key: 'status',
           label: 'Status',
@@ -963,7 +970,7 @@ export function WagonsCrudPage() {
         },
         { key: 'notes', label: 'Notes' },
       ]}
-      emptyValues={{ wagonNumber: '', wagonTypeId: '', currentLocationYardId: '', tareWeight: 0, maxPayloadWeight: 0, status: 'AVAILABLE', notes: '' }}
+      emptyValues={{ wagonNumber: '', wagonTypeId: '', currentLocationYardId: '', status: 'AVAILABLE', notes: '' }}
     />
   );
 }

apps/edr-freight-web/backoffice/src/pages/fleet/config/resources.ts

@@ -263,17 +263,16 @@ export const FLEET_RESOURCES: FleetResourceConfig[] = [
     cardSubtitleKey: "currentYard",
     searchKeys: ["wagonNumber", "wagonTypeId", "trainId", "status", "currentYardId"],
     columns: [
+      // Tare weight and payload capacity are not wagon columns — they belong to the
+      // wagon type and are shown through it (see WagonsCrudPage in FleetCrudPages).
       { id: "wagonNumber", header: "Number", accessorKey: "wagonNumber", format: "code" },
       { id: "wagonTypeId", header: "Type", accessorKey: "wagonTypeId", format: "entityLabel" },
-      { id: "maxPayloadWeight", header: "Max payload", accessorKey: "maxPayloadWeight", format: "number" },
       { id: "currentYard", header: "Current Yard", accessorKey: "currentYard", format: "entityLabel" },
       { id: "status", header: "Status", accessorKey: "status", format: "statusBadge" },
     ],
     formFields: [
       { name: "wagonNumber", label: "Wagon number", type: "text", required: true },
       { name: "wagonTypeId", label: "Wagon type", type: "select", required: true, dynamicOptions: "wagonTypes" },
-      { name: "tareWeight", label: "Tare weight", type: "number", required: true },
-      { name: "maxPayloadWeight", label: "Max payload weight", type: "number", required: true },
       { name: "currentYardId", label: "Current Yard", type: "select", dynamicOptions: "yards" },
       { name: "status", label: "Status", type: "select", required: true, options: WAGON_STATUS_OPTIONS },
       { name: "notes", label: "Notes", type: "textarea" },
@@ -281,8 +280,6 @@ export const FLEET_RESOURCES: FleetResourceConfig[] = [
     emptyValues: {
       wagonNumber: "",
       wagonTypeId: "",
-      tareWeight: 0,
-      maxPayloadWeight: 0,
       currentYardId: "",
       status: Freight.WagonStatus.Available,
       notes: "",