fix(iam): scope customer nickname to customer management

iam/src/test/java/com/baiyue/iam/service/TenantServiceTest.java

@@ -339,7 +339,7 @@ class TenantServiceTest {
     }
 
     @Test
-    void customerNicknameDefaultsToFirstChineseCharacterAndAcceptsManualValue() {
+    void customerNicknameDefaultsToUppercasePinyinInitialsAndAcceptsManualValue() {
         assertEquals("SZWLYXGS", TenantService.resolveCustomerNickname(null, "ABC 深圳物流有限公司"));
         assertEquals("SZWL", TenantService.resolveCustomerNickname(null, "深圳物流"));
         assertEquals("A", TenantService.resolveCustomerNickname(" ", "ABC Logistics"));