## What
Add an eye icon to every password field that toggles between masked and
plaintext, so users can verify what they typed.
New reusable `PasswordInput` component
(`components/ui/password-input.tsx`) wrapping the base `Input` with an
`Eye`/`EyeOff` toggle.
## Where
- **Auth**: login, register (password + confirm), reset password
(password + confirm)
- **Settings**: password form & account form (current + new + confirm)
- **Dialogs**: delete-account confirmation, encryption unlock dialog
## Details
- Toggle is keyboard-skipped (`tabIndex={-1}`), mirrors the input's
`disabled` state.
- Accessible: `aria-pressed` + `aria-label` (`Show password` / `Hide
password`), translated and added to `lang/es.json`.
- Dark-mode aware via existing `text-muted-foreground` /
`hover:text-foreground` tokens.
## Tests
- New vitest suite for `PasswordInput` (mask default, toggle, ref
forwarding, disabled state) — 4 passing.
- `LocalizationTest` passing (new translation keys present).
- eslint + prettier clean.
## Not included
Left out (can add on request): `confirm-password.tsx`,
`setup-encryption.tsx`, and the open-banking API key/secret fields.
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