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

app/libs/cookies.ts

@@ -1,16 +1,16 @@
-import { adminTokenCookieConfig, userTokenCookieConfig } from './cookie.server'
+import { staffTokenCookieConfig, userTokenCookieConfig } from './cookie.server'
 
 export const handleCookie = async (request: Request) => {
   const headers = request.headers
   const userToken = (await userTokenCookieConfig.parse(
     headers.get('Cookie'),
   )) as string
-  const adminToken = (await adminTokenCookieConfig.parse(
+  const staffToken = (await staffTokenCookieConfig.parse(
     headers.get('Cookie'),
   )) as string
 
   return {
     userToken,
-    adminToken,
+    staffToken,
   }
 }