fix(order): preserve tax mode in remainder child orders

order/src/main/java/com/baiyue/order/service/OrderFulfillmentSplitService.java

@@ -142,6 +142,7 @@ public class OrderFulfillmentSplitService {
         child.setReceivingWarehouseName(root.getReceivingWarehouseName()); child.setChannelCode(root.getChannelCode());
         child.setChannelName(root.getChannelName()); child.setDestinationType(root.getDestinationType());
         child.setFulfillmentType(root.getFulfillmentType());
+        child.setTaxMode(root.getTaxMode());
         child.setInboundCode(remainderInboundCode(root, sequence));
         child.setCreatedBy(operatorId); child.setUpdatedBy(operatorId);
         if (orders.insert(child) != 1) throw new BizException(ResultCode.CONFLICT, "余量子订单创建失败");

order/src/test/java/com/baiyue/order/repository/UnifiedOrderTaxModePaginationTest.java

@@ -24,11 +24,13 @@ import static org.assertj.core.api.Assertions.assertThat;
 /** Real mapper + pagination interceptor: tax filtering applies to COUNT and records before LIMIT. */
 class UnifiedOrderTaxModePaginationTest {
     private OrderRepository repository;
+    private JdbcTemplate jdbc;
+    private OrderMapper mapper;
     @BeforeEach
     void setup() throws Exception {
         var dataSource = new JdbcDataSource();
         dataSource.setURL("jdbc:h2:mem:tax-page-" + UUID.randomUUID() + ";MODE=MySQL;DB_CLOSE_DELAY=-1");
-        var jdbc = new JdbcTemplate(dataSource);
+        jdbc = new JdbcTemplate(dataSource);
         var columns = new ArrayList<String>();
         for (Class<?> type = OrderEntity.class; type != Object.class; type = type.getSuperclass()) {
             for (var field : type.getDeclaredFields()) {
@@ -41,7 +43,9 @@ class UnifiedOrderTaxModePaginationTest {
                     : valueType == java.math.BigDecimal.class ? "DECIMAL(20,6)"
                     : valueType == java.time.LocalDateTime.class ? "TIMESTAMP"
                     : valueType == java.time.LocalDate.class ? "DATE" : "VARCHAR(2000)";
-                columns.add(name + " " + sqlType + (name.equals("id") ? " PRIMARY KEY" : ""));
+                columns.add(name + " " + sqlType + (name.equals("id") ? " PRIMARY KEY"
+                    : name.equals("deleted") || name.equals("version") ? " DEFAULT 0"
+                    : name.equals("created_at") ? " DEFAULT CURRENT_TIMESTAMP" : ""));
             }
         }
         jdbc.execute("CREATE TABLE ord_order (" + String.join(",", columns) + ")");
@@ -58,7 +62,8 @@ class UnifiedOrderTaxModePaginationTest {
         factory.setDataSource(dataSource); factory.setConfiguration(config); factory.setPlugins(pagination);
         var session = new SqlSessionTemplate(factory.getObject());
         repository = new OrderRepository();
-        ReflectionTestUtils.setField(repository, "orderMapper", session.getMapper(OrderMapper.class));
+        mapper = session.getMapper(OrderMapper.class);
+        ReflectionTestUtils.setField(repository, "orderMapper", mapper);
     }
     @Test
     void taxModeFiltersCountsAndPagesWithoutLeakingAnotherCustomerOrDeletedRows() {
@@ -69,6 +74,41 @@ class UnifiedOrderTaxModePaginationTest {
         assertPage(null, 1, 4, 6);
         assertPage(null, 2, 4, 4);
     }
+
+    @org.junit.jupiter.params.ParameterizedTest
+    @org.junit.jupiter.params.provider.ValueSource(strings = {"TAX_REFUND", "BUY_DECLARATION"})
+    void realSplitChildIsPersistedAndIncludedInTaxFilteredParentChildPages(String taxMode) {
+        jdbc.update("UPDATE ord_order SET tax_mode=?,order_role='MASTER',order_no='TAX-PARENT',inbound_code='TAX-INBOUND',version=0 WHERE id=6", taxMode);
+        var root = mapper.findOwned(11L, 6L);
+        var ledger = org.mockito.Mockito.mock(com.baiyue.order.mapper.OrderFulfillmentSplitMapper.class);
+        org.mockito.Mockito.when(ledger.findByIdempotency(11L, 6L, "tax-split")).thenReturn(List.of());
+        org.mockito.Mockito.when(ledger.lockOrder(11L, 6L)).thenReturn(root);
+        org.mockito.Mockito.when(ledger.insert(org.mockito.ArgumentMatchers.any(com.baiyue.order.entity.OrderFulfillmentSplitEntity.class))).thenReturn(1);
+        org.mockito.Mockito.when(ledger.incrementParentVersion(11L, 6L, 0, 9L)).thenReturn(1);
+        var splitter = new com.baiyue.order.service.OrderFulfillmentSplitService();
+        ReflectionTestUtils.setField(splitter, "splits", ledger);
+        ReflectionTestUtils.setField(splitter, "orders", mapper);
+        ReflectionTestUtils.setField(splitter, "json", new com.fasterxml.jackson.databind.ObjectMapper());
+        var result = splitter.split(new com.baiyue.order.dto.OrderSplitDtos.CreateRequest(
+            11L, 6L, 6L, 701L, 801L, 2, 1, 1, 0, "tax-split", "op-tax-split",
+            List.of(new com.baiyue.order.dto.OrderSplitDtos.QuantityLine(99L, 2)), "operator"), 9L);
+        long childId = result.remainderChild().orderId();
+        assertThat(mapper.findOwned(11L, childId).getTaxMode()).isEqualTo(taxMode);
+        var pageIds = new ArrayList<Long>();
+        for (long page = 1; page <= 2; page++) {
+            var query = new UnifiedOrderQuery(null, "TAX-PARENT", null, null, null, null, null, null, null,
+                null, null, null, null, null, null, null, null, null, null, null, page, 1, taxMode);
+            var filtered = repository.unifiedPage(11L, query, List.of(com.baiyue.order.entity.OrderStatus.APPROVED));
+            assertThat(filtered.total()).isEqualTo(2);
+            assertThat(filtered.records()).singleElement().satisfies(row -> {
+                pageIds.add(row.getId());
+                assertThat(row.getTaxMode()).isEqualTo(taxMode);
+                assertThat(row.getTenantId()).isEqualTo(11L);
+            });
+        }
+        assertThat(pageIds).containsExactlyInAnyOrder(childId, 6L);
+        assertThat(mapper.findOwned(22L, childId)).isNull();
+    }
     private void assertPage(String taxMode, long page, long total, long expectedId) {
         var query = new UnifiedOrderQuery(null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, page, 1, taxMode);
         var result = repository.unifiedPage(11L, query, List.of(com.baiyue.order.entity.OrderStatus.APPROVED));

order/src/test/java/com/baiyue/order/service/OrderFulfillmentSplitServiceTest.java

@@ -68,6 +68,25 @@ class OrderFulfillmentSplitServiceTest {
         verify(splits).incrementParentVersion(10, 100, 3, 9);
     }
 
+    @org.junit.jupiter.params.ParameterizedTest
+    @org.junit.jupiter.params.provider.ValueSource(strings = {"TAX_REFUND", "BUY_DECLARATION"})
+    void remainderInheritsRootTaxModeThroughRealSplitCommand(String taxMode) {
+        OrderEntity parent = parent();
+        parent.setTaxMode(taxMode);
+        when(splits.findByIdempotency(10, 100, "tax-child")).thenReturn(List.of());
+        when(splits.lockOrder(10, 100)).thenReturn(parent);
+        when(orders.insert(any(OrderEntity.class))).thenReturn(1);
+        when(splits.insert(any(OrderFulfillmentSplitEntity.class))).thenReturn(1);
+        when(splits.incrementParentVersion(10, 100, 3, 9)).thenReturn(1);
+        var result = service.split(request(100L, 20, 8, 12, "tax-child"), 9);
+        ArgumentCaptor<OrderEntity> child = ArgumentCaptor.forClass(OrderEntity.class);
+        verify(orders).insert(child.capture());
+        assertThat(child.getValue().getId()).isEqualTo(result.remainderChild().orderId());
+        assertThat(child.getValue().getTaxMode()).isEqualTo(taxMode);
+        assertThat(child.getValue().getTenantId()).isEqualTo(parent.getTenantId());
+        assertThat(child.getValue().getRootOrderId()).isEqualTo(parent.getId());
+    }
+
     @Test
     void rejectsConcurrentParentVersionChangeWithoutPublishingNextVersion() {
         OrderEntity parent = parent();