优化

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

@@ -49,6 +49,18 @@ class FbaPricingServiceTest {
     @MockBean private FbaPricingRepository repository;
     @Resource private FbaPricingService service;
 
+    @Test
+    @DisplayName("客户B不能读取客户A的费用快照")
+    void rejectsCrossCustomerFeeLookup() {
+        assertThatThrownBy(() -> service.latest(10002L, INBOUND))
+            .isInstanceOf(BizException.class)
+            .extracting(error -> ((BizException) error).getResultCode())
+            .isEqualTo(ResultCode.NOT_FOUND);
+
+        verify(repository).findLatestFee(10002L, INBOUND);
+        verify(repository, never()).findLatestFee(TENANT, INBOUND);
+    }
+
     @Test
     @DisplayName("包税KG按配置系数取体积重较大值并按规则向上舍入")
     void calculatesTaxIncludedKgWithConfiguredFactorAndPrecision() {