fix: prepare mixed-SKU dropship acceptance data

firstleg/src/test/java/com/baiyue/firstleg/service/InboundCartonLabelServiceTest.java

@@ -19,6 +19,7 @@ import org.springframework.test.util.ReflectionTestUtils;
 import java.math.BigDecimal;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
@@ -98,6 +99,23 @@ class InboundCartonLabelServiceTest {
             any(Long.class), any(String.class), any(), any(Integer.class), any(Integer.class));
     }
 
+    @Test
+    void mixedCartonSkuSummaryStaysWithinPrintContractLimit() {
+        InboundCartonLabelEntity label = new InboundCartonLabelEntity();
+        label.setId(90001L);
+        List<InboundCartonLabelSkuMapper.SkuRow> rows = List.of(
+            skuRow(90001L, "SKU-SMALL-ADMIN-API-20260911081504632"),
+            skuRow(90001L, "SKU-MEDIUM-ADMIN-API-20260911081504632"),
+            skuRow(90001L, "SKU-LARGE-ADMIN-API-20260911081504632"),
+            skuRow(90001L, "SKU-EXTRA-LARGE-ADMIN-API-20260911081504632"));
+
+        String summary = ReflectionTestUtils.invokeMethod(service, "displaySkuCodes", label,
+            Map.of(90001L, rows));
+
+        assertThat(summary.codePointCount(0, summary.length())).isLessThanOrEqualTo(64);
+        assertThat(summary).startsWith("SKU-SMALL-").endsWith(" / +3 SKU");
+    }
+
     @Test
     void repeatedAndPartialPrintsReadFrozenMappingWithoutReallocation() {
         InboundOrderEntity inbound = inbound();
@@ -312,6 +330,13 @@ class InboundCartonLabelServiceTest {
             units, new BigDecimal("60"), new BigDecimal("40"), new BigDecimal("30"), null, group);
     }
 
+    private InboundCartonLabelSkuMapper.SkuRow skuRow(long labelId, String skuCode) {
+        InboundCartonLabelSkuMapper.SkuRow row = new InboundCartonLabelSkuMapper.SkuRow();
+        row.setCartonLabelId(labelId);
+        row.setSkuCode(skuCode);
+        return row;
+    }
+
     private List<InboundCartonLabelEntity> labels(InboundOrderEntity inbound, int total) {
         List<InboundCartonLabelEntity> values = new ArrayList<>();
         for (int index = 1; index <= total; index++) {