devices page: implement delete option

src/routes/devices/+page.server.ts

@@ -1,13 +1,13 @@
 import type { Actions } from './$types';
 import { createDevice } from '$lib/server/devices';
-import { error, redirect } from '@sveltejs/kit';
+import { error, fail, redirect } from '@sveltejs/kit';
 
 export const actions = {
 	create: async (event) => {
 		if (!event.locals.user) return error(401, 'Unauthorized');
 		const formData = await event.request.formData();
 		const name = formData.get('name');
-		if (typeof name !== 'string' || name.trim() === '') return error(400, 'Invalid name');
+		if (typeof name !== 'string' || name.trim() === '') return fail(400, { name, invalid: true });
 		const res = await createDevice({
 			name: name.trim(),
 			user: event.locals.user,