refactor: standardize access token variable naming across routes

app/routes/actions.admin.upload.ts

@@ -10,7 +10,7 @@ import { handleCookie } from '~/libs/cookies'
 import type { Route } from './+types/actions.admin.upload'
 
 export const action = async ({ request }: Route.ActionArgs) => {
-  const { staffToken } = await handleCookie(request)
+  const { staffToken: accessToken } = await handleCookie(request)
 
   try {
     const {
@@ -29,7 +29,7 @@ export const action = async ({ request }: Route.ActionArgs) => {
 
     const { data: uploadData } = await uploadFileRequest({
       payload,
-      accessToken: staffToken,
+      accessToken,
     })
 
     return data(