fix: use server-resolved accountServiceBaseUrl for OAuth login URLs

Replace process.env.NEXT_PUBLIC_ACCOUNTS_SVC_URL (undefined in preview)
with the accountServiceBaseUrl prop resolved via getAccountServiceBaseUrl().
Fixes undefined/api/auth/oauth/login/github|google on preview.svc.plus.

src/app/(auth)/login/LoginContent.tsx

@@ -73,8 +73,8 @@ export default function LoginContent({
     `${accountServiceBaseUrl}/api/auth/login`;
 
   const socialButtonsDisabled = false;
-  const githubAuthUrl = `${process.env.NEXT_PUBLIC_ACCOUNTS_SVC_URL}/api/auth/oauth/login/github`;
-  const googleAuthUrl = `${process.env.NEXT_PUBLIC_ACCOUNTS_SVC_URL}/api/auth/oauth/login/google`;
+  const githubAuthUrl = `${accountServiceBaseUrl}/api/auth/oauth/login/github`;
+  const googleAuthUrl = `${accountServiceBaseUrl}/api/auth/oauth/login/google`;
 
   useEffect(() => {
     const publicToken = searchParams.get("public_token");

src/app/(auth)/register/RegisterContent.tsx

@@ -31,7 +31,13 @@ const EMAIL_PATTERN = /^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$/;
 const PASSWORD_STRENGTH_PATTERN = /^(?=.*[A-Za-z])(?=.*\d).{8,}$/;
 const USERNAME_PATTERN = /^[a-zA-Z][a-zA-Z0-9]{3,15}$/;
 
-export default function RegisterContent() {
+type RegisterContentProps = {
+  accountServiceBaseUrl: string;
+};
+
+export default function RegisterContent({
+  accountServiceBaseUrl,
+}: RegisterContentProps) {
   const { language } = useLanguage();
   const t = translations[language].auth.register;
   const alerts = t.alerts;
@@ -39,8 +45,8 @@ export default function RegisterContent() {
   const router = useRouter();
 
   const isSocialAuthVisible = false;
-  const githubAuthUrl = `${process.env.NEXT_PUBLIC_ACCOUNTS_SVC_URL}/api/auth/oauth/login/github`;
-  const googleAuthUrl = `${process.env.NEXT_PUBLIC_ACCOUNTS_SVC_URL}/api/auth/oauth/login/google`;
+  const githubAuthUrl = `${accountServiceBaseUrl}/api/auth/oauth/login/github`;
+  const googleAuthUrl = `${accountServiceBaseUrl}/api/auth/oauth/login/google`;
 
   const socialButtons = useMemo<AuthLayoutSocialButton[]>(() => {
     if (!isSocialAuthVisible) {
@@ -326,8 +332,8 @@ export default function RegisterContent() {
     setIsSubmitting(true);
     showStatus(
       t.form.validation?.submitting ??
-        t.form.submitting ??
-        "Submitting registration request…",
+      t.form.submitting ??
+      "Submitting registration request…",
     );
 
     try {
@@ -394,9 +400,9 @@ export default function RegisterContent() {
     setIsSubmitting(true);
     showStatus(
       t.form.validation?.completing ??
-        t.form.completing ??
-        t.form.completeSubmit ??
-        t.form.submit,
+      t.form.completing ??
+      t.form.completeSubmit ??
+      t.form.submit,
     );
 
     try {

src/app/(auth)/register/page.tsx

@@ -6,6 +6,7 @@ import { Suspense } from 'react'
 import { notFound } from 'next/navigation'
 
 import { isFeatureEnabled } from '@lib/featureToggles'
+import { getAccountServiceBaseUrl } from '@server/serviceConfig'
 
 import RegisterContent from './RegisterContent'
 
@@ -18,9 +19,11 @@ export default function RegisterPage() {
     notFound()
   }
 
+  const accountServiceBaseUrl = getAccountServiceBaseUrl()
+
   return (
     <Suspense fallback={<RegisterPageFallback />}>
-      <RegisterContent />
+      <RegisterContent accountServiceBaseUrl={accountServiceBaseUrl} />
     </Suspense>
   )
 }