chore: address oauth PR concerns (#1184)

packages/tm-core/src/auth/index.ts

@@ -2,20 +2,20 @@
  * Authentication module exports
  */
 
-export { AuthManager } from './auth-manager';
-export { CredentialStore } from './credential-store';
-export { OAuthService } from './oauth-service';
+export { AuthManager } from './auth-manager.js';
+export { CredentialStore } from './credential-store.js';
+export { OAuthService } from './oauth-service.js';
 
 export type {
 	AuthCredentials,
 	OAuthFlowOptions,
 	AuthConfig,
 	CliData
-} from './types';
+} from './types.js';
 
-export { AuthenticationError } from './types';
+export { AuthenticationError } from './types.js';
 
 export {
 	DEFAULT_AUTH_CONFIG,
 	getAuthConfig
-} from './config';
+} from './config.js';