Fold watch-only into Import; support xprv spending import

Home screen is back to two tabs (Create / Import). The Import box now
takes a recovery phrase, an xpub/zpub, or an xprv/zprv:
- mnemonic → full wallet (as before)
- xpub/zpub → watch-only (view/receive, no Send)
- xprv/zprv → full spending wallet with no mnemonic. parseExtendedKey
  classifies + normalizes version bytes; account() derives the BIP84
  path from a master xprv (depth 0) or uses an account-level xprv as-is;
  signing works (only watch-only blocks it). Vault persists xprv accounts
  too; Settings shows an "Imported key" note instead of a recovery card
  and hides Nostr sync (no seed). Public-key export still works.

Note: a seed phrase cannot be derived from an xprv (one-way KDF), so an
xprv wallet has no recovery words by design. New strings in all 19 locales.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/locales/sw.json b/src/locales/sw.json
index 5876383..6480d5b 100644
--- a/src/locales/sw.json
+++ b/src/locales/sw.json
@@ -176,7 +176,6 @@
   "accounts": "Akaunti",
   "addWallet": "Ongeza pochi",
   "lockAll": "Funga zote",
-  "remove": "Ondoa",
   "watchOnly": "Kutazama tu",
   "watchOnlyTag": "kutazama tu",
   "watchOnlyAdd": "Ongeza ya kutazama tu",
@@ -206,5 +205,10 @@
   "unlockSavedDesc": "Ingiza nenosiri lako ili kufungua pochi zilizohifadhiwa kwenye kifaa hiki.",
   "unlock": "Fungua",
   "useAnotherWallet": "Tumia pochi nyingine",
-  "save": "Hifadhi"
+  "save": "Hifadhi",
+  "importLabel": "Kifungu cha kurejesha au ufunguo",
+  "importPlaceholder": "Maneno yako 12 au 24, au xpub / xprv",
+  "invalidImport": "Hiyo si kifungu sahihi cha kurejesha, xpub, au xprv.",
+  "importedKey": "Ufunguo ulioagizwa",
+  "importedKeyNote": "Pochi hii iliagizwa kutoka kwa ufunguo wa faragha uliopanuliwa, kwa hiyo hakuna kifungu cha kurejesha. Hifadhi ufunguo huo wenyewe ili kuendelea kuwa na pochi."
 }
\ No newline at end of file