Fix language switch in logged-out menu

types/GranblueCookie.d.ts

@@ -1,5 +1,5 @@
 interface GranblueCookie {
-  account: AccountCookie
-  user: UserCookie
+  account?: AccountCookie
+  user?: UserCookie
   locale: string
 }

utils/retrieveCookies.tsx

@@ -6,18 +6,20 @@ export default function retrieveCookies(
   res?: NextApiResponse
 ): GranblueCookie | undefined {
   const cookies = getCookies({ req, res })
-  if (!cookies) return undefined
-
   const {
     account: accountData,
     user: userData,
     NEXT_LOCALE: localeData,
   } = cookies
-  if (!accountData || !userData) return undefined
 
-  const account = JSON.parse(decodeURIComponent(accountData)) ?? undefined
-  const user = JSON.parse(decodeURIComponent(userData)) ?? undefined
-  const locale = localeData as string
+  if ((!accountData || !userData) && localeData)
+    return { account: undefined, user: undefined, locale: localeData }
 
-  return { account, user, locale }
+  if (accountData && userData) {
+    const account = JSON.parse(decodeURIComponent(accountData)) ?? undefined
+    const user = JSON.parse(decodeURIComponent(userData)) ?? undefined
+    const locale = localeData as string
+
+    return { account, user, locale }
+  }
 }