# Polish: Form Validation

## Pattern
```typescript
const isSubmitting = ref(false)
const passwordErrors = computed(() => {
  const errors: string[] = []
  if (password.value.length > 0 && password.value.length < 8)
    errors.push('Must be at least 8 characters')
  return errors
})

async function submit() {
  if (isSubmitting.value) return
  isSubmitting.value = true
  try { await rpcClient.call(...) }
  catch (err) { errorMessage.value = formatError(err) }
  finally { isSubmitting.value = false }
}
```

## Checklist per form
- Real-time validation as user types (debounced 300ms)
- Submit button disabled during operation and when validation fails
- All text inputs trimmed before submission
- Error messages are user-friendly (no raw error strings)
- TOTP: `inputmode="numeric"`, auto-submit at 6 digits

## Forms to polish
Login.vue (password setup, TOTP), Settings.vue (password change), any other form inputs.