feat(settings): redesign encrypt & change-passphrase modals onto reference design

Migrate the Encrypt Wallet (3-phase) and Change Passphrase dialogs in
renderEncryptWalletDialog onto the settings-modal reference design —
presentation-only, no change to the crypto/state-machine/secret-wipe logic:

- struct-form BeginOverlayDialog(OverlayDialogSpec{BlurFloat, cardWidth, idSuffix})
  replacing the legacy positional overload (same visual style, dp-scaled width)
- amber TextWrapped warning -> material::DialogWarningHeader(wiz_encrypt_warning)
- drop redundant Separator dividers
- every hardcoded English string -> TR() (13 new enc_*/change_pass_* keys added to
  the English source + all 8 res/lang/*.json additively; CJK subset rebuilt)

The strength-meter math, 3-phase transitions, "cannot close while encrypting"
guard, memset/SecureVault buffer wipes, and the encrypt/changePassphrase/vault
async paths are byte-for-byte unchanged. Verified: build + ctest + hygiene clean,
wiz_strength %s format-string safe across all languages, and a 3-lens adversarial
review (secret-hygiene / presentation-only / ui-i18n) returned zero findings.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

res/lang/es.json

@@ -116,6 +116,10 @@
     "bootstrap_wallet_protected": "(wallet.dat está protegido)",
     "bootstrap_warning": "Los datos de bloques existentes (blocks, chainstate, notarizations) se eliminarán y reemplazarán. Su wallet.dat NO será modificado ni eliminado.",
     "cancel": "Cancelar",
+    "change_pass_confirm": "Confirmar nueva:",
+    "change_pass_current": "Frase de contraseña actual:",
+    "change_pass_new": "Nueva frase de contraseña:",
+    "change_pass_title": "Cambiar frase de contraseña",
     "characters": "caracteres",
     "chat": "Chat",
     "chat_cancel": "Cancelar",
@@ -341,6 +345,15 @@
     "download_bootstrap": "Descargar Bootstrap",
     "dragonx_green": "DragonX (Verde)",
     "edit": "Editar",
+    "enc_confirm": "Confirmar:",
+    "enc_desc": "Cifrar tu monedero protege tus claves privadas con una frase de contraseña. Tras el cifrado, el daemon se reiniciará.",
+    "enc_encrypting": "Cifrando el monedero...",
+    "enc_pin_desc": "Un PIN de 4-8 dígitos te permite desbloquear tu monedero sin escribir la frase de contraseña completa cada vez.",
+    "enc_pin_set_ok": "PIN configurado correctamente",
+    "enc_pin_skipped": "PIN omitido. Puedes configurar uno más tarde en Ajustes.",
+    "enc_pin_vault_fail": "No se pudo crear la bóveda del PIN",
+    "enc_success": "¡Monedero cifrado correctamente!",
+    "enc_wait": "Espera, no cierres la aplicación.",
     "error": "Error",
     "error_format": "Error: %s",
     "est_time_to_block": "Tiempo Est. al Bloque",