train loading for import

apps/edr-freight-web/portal/src/pages/bookings/BookingDetailPage/components/CustomerTruckAssignmentCard.tsx

@@ -73,6 +73,10 @@ export function CustomerTruckAssignmentCard({
     (n) => !assignedNumbers.has(n),
   );
 
+  // EXPORT trucks deliver known containers (pre-selected). IMPORT trucks don't —
+  // staff register + weigh what was loaded when the truck leaves.
+  const isExport = booking.tradeDirection === "EXPORT";
+
   const resetForm = () => {
     setPlateNumber("");
     setDriverName("");
@@ -87,7 +91,8 @@ export function CustomerTruckAssignmentCard({
         truckPlateNumber: plateNumber.trim().toUpperCase(),
         driverName: driverName.trim(),
         truckType: truckType.trim(),
-        containerNumbers: containers,
+        // Import: containers are registered + weighed on departure, not here.
+        containerNumbers: isExport ? containers : [],
       }),
     onSuccess: (list) => {
       queryClient.setQueryData(trucksKey, list);
@@ -118,7 +123,7 @@ export function CustomerTruckAssignmentCard({
       setError("Plate number, driver name and truck type are required.");
       return;
     }
-    if (containers.length < 1 || containers.length > 2) {
+    if (isExport && (containers.length < 1 || containers.length > 2)) {
       setError("Select 1 or 2 container numbers for this truck.");
       return;
     }
@@ -202,8 +207,8 @@ export function CustomerTruckAssignmentCard({
           </Alert>
         )}
 
-        {/* Add-truck form */}
-        {availableContainers.length > 0 ? (
+        {/* Add-truck form. Export needs unassigned containers; import always allows another truck. */}
+        {(isExport ? availableContainers.length > 0 : true) ? (
           <>
             <Divider label="Add a truck" labelPosition="center" />
             <SimpleGrid cols={{ base: 1, sm: 2 }} spacing="sm">
@@ -226,17 +231,19 @@ export function CustomerTruckAssignmentCard({
                 value={truckType || null}
                 onChange={(value) => setTruckType(value ?? "")}
               />
-              <MultiSelect
-                label="Containers to load (1–2)"
-                required
-                placeholder="Select container numbers"
-                data={availableContainers}
-                value={containers}
-                onChange={setContainers}
-                maxValues={2}
-                searchable
-                nothingFoundMessage="No unassigned containers"
-              />
+              {isExport && (
+                <MultiSelect
+                  label="Containers to load (1–2)"
+                  required
+                  placeholder="Select container numbers"
+                  data={availableContainers}
+                  value={containers}
+                  onChange={setContainers}
+                  maxValues={2}
+                  searchable
+                  nothingFoundMessage="No unassigned containers"
+                />
+              )}
             </SimpleGrid>
             <Group justify="flex-end">
               <Button