fix(dispatch): use supported capacity for default draft groups

lastleg-service/src/test/java/com/baiyue/lastleg/dispatch/service/DispatchServiceTest.java

@@ -163,6 +163,7 @@ class DispatchServiceTest {
         ArgumentCaptor<DispatchDraftContainer> group = ArgumentCaptor.forClass(DispatchDraftContainer.class);
         verify(draftContainers).insert(group.capture());
         assertNotNull(group.getValue().getId());
+        assertEquals(30, group.getValue().getCapacity());
         assertEquals(group.getValue().getId(), lock.getValue().getDraftContainerId());
         assertNotNull(lock.getValue().getExpiresAt());
         assertEquals(null, lock.getValue().getDispatchOrderId());
@@ -676,6 +677,40 @@ class DispatchServiceTest {
         verify(orders, never()).insert(any(DispatchOrder.class)); verify(items, never()).insert(any(DispatchItem.class));
     }
 
+    @Test
+    void groupedPreArrangeRejectsUnsupportedStoredCapacityBeforeCreatingDispatches() {
+        var fixture = twoGroupFixture();
+        for (Integer capacity : java.util.Arrays.asList(null, 0, 31, 500)) {
+            fixture.containers().get(0).setCapacity(capacity);
+            var error = assertThrows(ResponseStatusException.class,
+                () -> service.preArrangeDraft("7", fixture.request()));
+            assertEquals(409, error.getStatusCode().value());
+            assertEquals("车辆大小仅支持15托或30托", error.getReason());
+        }
+        verify(orders, never()).insert(any(DispatchOrder.class));
+        verify(items, never()).insert(any(DispatchItem.class));
+    }
+
+    @Test
+    void groupedPreArrangeRejectsThirtyOnePalletsInThirtyPalletVehicle() {
+        twoGroupFixture();
+        var palletIds = java.util.stream.LongStream.rangeClosed(100, 130).boxed().toList();
+        var bound = palletIds.stream().map(id -> {
+            var lock = new DispatchPalletLock();
+            lock.setPlanPalletId(id);
+            return lock;
+        }).toList();
+        when(locks.lockActiveByDraftContainer("draft-multi", 21L)).thenReturn(bound);
+        var request = new DispatchRequests.PreArrangeDraft("draft-multi",
+            List.of(new DispatchRequests.DraftGroup(21L, palletIds, List.of())));
+        var error = assertThrows(ResponseStatusException.class,
+            () -> service.preArrangeDraft("7", request));
+        assertEquals(409, error.getStatusCode().value());
+        assertEquals("装车分组超过车型托位容量", error.getReason());
+        verify(orders, never()).insert(any(DispatchOrder.class));
+        verify(items, never()).insert(any(DispatchItem.class));
+    }
+
     @Test
     void secondGroupFailureRollsBackFirstGroupInsertInTheSameTransaction() {
         var fixture = twoGroupFixture();