feat: throw 401 errors when a user doesn't have permissions (#5984)

* feat: throw 401 errors when a user doesn't have permissions

* remove pointless message

* prepr

apps/frontend/src/middleware/staff.ts

@@ -0,0 +1,13 @@
+import { isStaff } from '@modrinth/utils'
+
+export default defineNuxtRouteMiddleware(async () => {
+	const auth = await useAuth()
+
+	if (!auth.value.user || !isStaff(auth.value.user)) {
+		throw createError({
+			fatal: true,
+			statusCode: 401,
+			statusMessage: 'Unauthorized',
+		})
+	}
+})