refactor(assets): build logo/favicon URLs via withOriginBaseUrl helper

Swap the logo/favicon URL constants from the inline
`${trimTrailingSlash(import.meta.env.BASE_URL)}/public/res/...` form to the
repo's existing `withOriginBaseUrl(getOriginBaseUrl(), '/public/res/...')`
helper (already used here for the OIDC callback URL). Functionally equivalent —
same /public/res/ target, resolves in dev and the static-copied prod build — and
it keeps the logo URL absolute and consistent with clientUri for the OIDC
logoUri. No build-config change (publicDir stays false).

Co-authored-by: Nathan Vititoe <nathanvititoe@gmail.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/pages/auth/AuthLayout.tsx

@@ -20,7 +20,7 @@ import {
 } from '../../hooks/useClientConfig';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
 import { LOGIN_PATH, REGISTER_PATH, RESET_PASSWORD_PATH } from '../paths';
-import { trimTrailingSlash } from '../../utils/common';
+import { getOriginBaseUrl, withOriginBaseUrl } from '../pathUtils';
 import { ServerPicker } from './ServerPicker';
 import { AutoDiscoveryAction, autoDiscovery } from '../../cs-api';
 import { SpecVersionsLoader } from '../../components/SpecVersionsLoader';
@@ -31,7 +31,7 @@ import { AuthFlowsProvider } from '../../hooks/useAuthFlows';
 import { AuthServerProvider } from '../../hooks/useAuthServer';
 import { tryDecodeURIComponent } from '../../utils/dom';
 
-const LotusLogo = `${trimTrailingSlash(import.meta.env.BASE_URL)}/public/res/Lotus.png`;
+const LotusLogo = withOriginBaseUrl(getOriginBaseUrl(), '/public/res/Lotus.png');
 
 const currentAuthPath = (pathname: string): string => {
   if (matchPath(LOGIN_PATH, pathname)) {