feat: refactor admin authentication to staff authentication with updated cookie handling

app/routes/_admin.lg-admin.tsx

@@ -9,18 +9,18 @@ import { handleCookie } from '~/libs/cookies'
 import type { Route } from './+types/_admin.lg-admin'
 
 export const loader = async ({ request }: Route.LoaderArgs) => {
-  const { adminToken } = await handleCookie(request)
+  const { staffToken } = await handleCookie(request)
   const { pathname } = new URL(request.url)
   const isAuthPage = AUTH_PAGES.includes(pathname)
   let adminData
 
-  if (!isAuthPage && !adminToken) {
+  if (!isAuthPage && !staffToken) {
     throw redirect('/lg-admin/login')
   }
 
-  if (adminToken) {
+  if (staffToken) {
     const { data } = await getStaff({
-      accessToken: adminToken,
+      accessToken: staffToken,
     })
     adminData = data
   }