fix(auth): prevent removal of 'locale' cookie (#1083)

* Draft MR

* fix(auth): prevent removal of 'locale' cookie

- Skip removal for 'locale' cookie
- Ensure other cookies are cleared

Author: zhendi

frontend/src/packs/auth.js

@@ -10,6 +10,8 @@ const clearCookies = () => {
   const cookieKeys = cookies.keys()
 
   cookieKeys.forEach((cookieName) => {
+    if (cookieName === 'locale') return
+
     cookies.remove(cookieName)
 
     DOMAINS.forEach(({ path, domain }) => {