feat(selfop): prefer list SKU quantities with targeted detail fallback

integration-service/src/test/java/com/baiyue/integration/controller/LingxingInternalControllerTest.java

@@ -131,7 +131,7 @@ class LingxingInternalControllerTest {
     void authenticatedReadReturnsOnlyOutboundSummary() throws Exception {
         when(client.queryPage(any(), any())).thenReturn(new PageResult(
                 List.of(new OrderSummary("TEST-OUT-001", "TEST-SRC-001", "TEST-CUSTOMER", "TEST-WH", 100,
-                        "2026-10-01 08:00:00", "2026-10-02 08:00:00")),
+                        "2026-10-01 08:00:00", "2026-10-02 08:00:00", null)),
                 1L, 1, 1, 1, 1, 1, 200, Instant.parse("2026-10-12T00:00:00Z"), null));
         mvc.perform(post(PATH).header("X-Internal-Service-Token", token).header("X-Lingxing-Egress-Context", CONTEXT)
                         .contentType(MediaType.APPLICATION_JSON).content(BODY))

integration-service/src/test/java/com/baiyue/integration/provider/lingxing/LingxingWmsClientTest.java

@@ -81,6 +81,17 @@ class LingxingWmsClientTest {
         assertThat(result.observedAt()).isEqualTo(NOW);
         assertThat(result.pages()).isEqualTo(1);
     }
+    @Test void listProductsPreserveDecimalsZeroAndMissingQuantity() {
+        response.set(page("current","size",1,1,1,1,ORDER.strip().replace("}","""
+            ,"productList":[{"productSku":"SKU","qty":2.123456},{"productSku":"ZERO","qty":0},
+            {"productSku":"UNKNOWN"},{"qty":4}]}""")));
+        var products=client().queryPage(query(1,1),context()).records().get(0).productList();
+        assertThat(products).hasSize(4);
+        assertThat(products.get(0).qty()).isEqualByComparingTo("2.123456");
+        assertThat(products.get(1).qty()).isEqualByComparingTo("0");
+        assertThat(products.get(2).qty()).isNull();assertThat(products.get(3).productSku()).isNull();
+        assertThat(calls.get()).isEqualTo(1);
+    }
     @Test void cancelledLocateOmitsTimeAndStatusAndRejectsFuzzyMatch() throws Exception {
         response.set(page("current", "size", 1, 1, 1, 1, ORDER.replace("100", "99").replace("2026-10-01 01:00:00", "")));
         var observer = org.mockito.Mockito.mock(LingxingQuantityCapture.class);