Route tenant admin PWA via /event-admin

resources/js/admin/auth/tokens.ts

@@ -1,5 +1,6 @@
 import { generateCodeChallenge, generateCodeVerifier, generateState } from './pkce';
 import { decodeStoredTokens } from './utils';
+import { ADMIN_AUTH_CALLBACK_PATH } from '../constants';
 
 const TOKEN_STORAGE_KEY = 'tenant_oauth_tokens.v1';
 const CODE_VERIFIER_KEY = 'tenant_oauth_code_verifier';
@@ -18,7 +19,7 @@ function getClientId(): string {
 }
 
 function buildRedirectUri(): string {
-  return new URL('/admin/auth/callback', window.location.origin).toString();
+  return new URL(ADMIN_AUTH_CALLBACK_PATH, window.location.origin).toString();
 }
 
 export class AuthError extends Error {