test(e2e): test login page

src/components/user/login-form.tsx

@@ -10,6 +10,7 @@ export default function LoginForm() {
   return (
     <form
       className='flex flex-col gap-5 w-full'
+      data-cy='login-form'
       action={async (formData) => {
         'use server';
         try {
@@ -27,17 +28,20 @@ export default function LoginForm() {
         label='E-Mail or Username'
         placeholder='What you are known as.'
         name='email'
+        data-cy='email-input'
       />
       <LabeledInput
         type='password'
         label='Password'
         placeholder="Let's hope you remember it."
         name='password'
+        data-cy='password-input'
       />
       <Button
         className='hover:bg-blue-600 hover:text-white'
         type='submit'
         variant='secondary'
+        data-cy='login-button'
       >
         Login
       </Button>