fix: align admin profile request validation

myteamwallet_frontend_modern/src/app/core/users/users-api.spec.ts

@@ -3,6 +3,7 @@ import { TestBed } from '@angular/core/testing';
 import { HttpTestingController, provideHttpClientTesting } from '@angular/common/http/testing';
 import { environment } from '../../../environments/environment';
 import { AdminUsersApi } from './admin-users-api';
+import { AdminUserProfileRequest } from '../../models/user-directory.model';
 import { UsersApi } from './users-api';
 
 describe('UsersApi', () => {
@@ -32,6 +33,21 @@ describe('AdminUsersApi', () => {
   let service: AdminUsersApi;
   let httpMock: HttpTestingController;
 
+  it('accepts profile requests with omitted or string names only', () => {
+    const omitted: AdminUserProfileRequest = {};
+    const names: AdminUserProfileRequest = {
+      firstName: 'Ada',
+      lastName: 'Admin',
+    };
+
+    // @ts-expect-error Profile names cannot be explicitly cleared to null.
+    const nullName: AdminUserProfileRequest = { firstName: null };
+
+    expect(omitted).toEqual({});
+    expect(names).toEqual({ firstName: 'Ada', lastName: 'Admin' });
+    expect(nullName).toEqual({ firstName: null });
+  });
+
   beforeEach(() => {
     TestBed.configureTestingModule({ providers: [provideHttpClient(), provideHttpClientTesting()] });
     service = TestBed.inject(AdminUsersApi);
@@ -41,10 +57,10 @@ describe('AdminUsersApi', () => {
   afterEach(() => httpMock.verify());
 
   it('uses the dedicated admin profile endpoint and payload', () => {
-    service.updateProfile(7, { firstName: 'Alex', lastName: null }).subscribe();
+    service.updateProfile(7, { firstName: 'Alex' }).subscribe();
     const request = httpMock.expectOne(`${environment.apiUrl}admin/users/7/profile`);
     expect(request.request.method).toBe('PATCH');
-    expect(request.request.body).toEqual({ firstName: 'Alex', lastName: null });
+    expect(request.request.body).toEqual({ firstName: 'Alex' });
     request.flush({});
   });
 

myteamwallet_frontend_modern/src/app/models/user-directory.model.ts

@@ -48,8 +48,8 @@ export interface UserDirectoryFilters {
 }
 
 export interface AdminUserProfileRequest {
-  firstName?: string | null;
-  lastName?: string | null;
+  firstName?: string;
+  lastName?: string;
 }
 
 export type AdminUserRoleId = 1 | 2;