fix: use corrected user ids for submission fields on the api

app/routes/machines/dialogs/move.tsx

@@ -1,3 +1,4 @@
+import { Key, useState } from 'react';
 import Dialog from '~/components/Dialog';
 import Select from '~/components/Select';
 import type { Machine, User } from '~/types';
@@ -10,6 +11,8 @@ interface MoveProps {
 }
 
 export default function Move({ machine, users, isOpen, setIsOpen }: MoveProps) {
+	const [userId, setUserId] = useState<Key | null>(null);
+
 	return (
 		<Dialog isOpen={isOpen} onOpenChange={setIsOpen}>
 			<Dialog.Panel>
@@ -19,11 +22,16 @@ export default function Move({ machine, users, isOpen, setIsOpen }: MoveProps) {
 				</Dialog.Text>
 				<input type="hidden" name="action_id" value="reassign" />
 				<input type="hidden" name="node_id" value={machine.id} />
+				<input type="hidden" name="user_id" value={userId?.toString()} />
 				<Select
+					isRequired
 					label="Owner"
 					name="user"
 					placeholder="Select a user"
 					defaultSelectedKey={machine.user.id}
+					onSelectionChange={(key) => {
+						setUserId(key);
+					}}
 				>
 					{users.map((user) => (
 						<Select.Item key={user.id}>{user.name}</Select.Item>