fix(lite): keep a rejected import key out of the log and Settings

The backend's error for a key it doesn't recognize repeats the key
("'<key>' was not recognized as either a spending key or a viewing
key"). Import passed that text on as its error, so a mistyped private
key was written to the lite log (shown in the Console tab) and to the
Settings status line. A failed import now carries a fixed reason
(unrecognized format, wallet locked, key already exists, could not be
decoded, or rejected), which is all the log records. Settings shows
"Couldn't import the key — check it, unlock the wallet (if encrypted)
and try again." instead, translated in all eight languages.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

res/lang/de.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "Ausblenden & löschen",
     "lite_import": "Importieren",
     "lite_import_key_label": "Schlüssel importieren",
+    "lite_key_import_failed": "Schlüssel konnte nicht importiert werden — prüfen Sie ihn, entsperren Sie die Wallet (falls verschlüsselt) und versuchen Sie es erneut.",
     "lite_key_imported": "Schlüssel importiert — führen Sie eine Synchronisierung durch, um den Verlauf zu scannen",
     "lite_lock_failed": "Sperren fehlgeschlagen",
     "lite_lock_now": "Jetzt sperren",

res/lang/es.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "Ocultar y borrar",
     "lite_import": "Importar",
     "lite_import_key_label": "Importar clave",
+    "lite_key_import_failed": "No se pudo importar la clave: compruébala, desbloquea el monedero (si está cifrado) e inténtalo de nuevo.",
     "lite_key_imported": "Clave importada: ejecuta una sincronización para escanear su historial",
     "lite_lock_failed": "Error al bloquear",
     "lite_lock_now": "Bloquear ahora",

res/lang/fr.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "Masquer et effacer",
     "lite_import": "Importer",
     "lite_import_key_label": "Importer une clé",
+    "lite_key_import_failed": "Impossible d'importer la clé — vérifiez-la, déverrouillez le portefeuille (s'il est chiffré) et réessayez.",
     "lite_key_imported": "Clé importée — lancez une synchronisation pour analyser son historique",
     "lite_lock_failed": "Échec du verrouillage",
     "lite_lock_now": "Verrouiller maintenant",

res/lang/ja.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "非表示にして消去",
     "lite_import": "インポート",
     "lite_import_key_label": "鍵をインポート",
+    "lite_key_import_failed": "鍵をインポートできませんでした。鍵を確認し、ウォレットのロックを解除して（暗号化されている場合）再試行してください。",
     "lite_key_imported": "鍵をインポートしました — 履歴をスキャンするには同期を実行してください",
     "lite_lock_failed": "ロックに失敗しました",
     "lite_lock_now": "今すぐロック",

res/lang/ko.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "숨기고 삭제",
     "lite_import": "가져오기",
     "lite_import_key_label": "키 가져오기",
+    "lite_key_import_failed": "키를 가져오지 못했습니다. 키를 확인하고 지갑 잠금을 해제한 후(암호화된 경우) 다시 시도하세요.",
     "lite_key_imported": "키를 가져왔습니다 — 동기화를 실행하여 기록을 스캔하세요",
     "lite_lock_failed": "잠금 실패",
     "lite_lock_now": "지금 잠그기",

res/lang/pt.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "Ocultar e apagar",
     "lite_import": "Importar",
     "lite_import_key_label": "Importar chave",
+    "lite_key_import_failed": "Não foi possível importar a chave — verifique-a, desbloqueie a carteira (se estiver criptografada) e tente novamente.",
     "lite_key_imported": "Chave importada — execute uma sincronização para escanear seu histórico",
     "lite_lock_failed": "Falha ao bloquear",
     "lite_lock_now": "Bloquear agora",

res/lang/ru.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "Скрыть и стереть",
     "lite_import": "Импорт",
     "lite_import_key_label": "Импортировать ключ",
+    "lite_key_import_failed": "Не удалось импортировать ключ — проверьте его, разблокируйте кошелёк (если зашифрован) и повторите попытку.",
     "lite_key_imported": "Ключ импортирован — выполните синхронизацию, чтобы просканировать его историю",
     "lite_lock_failed": "Не удалось заблокировать",
     "lite_lock_now": "Заблокировать сейчас",

res/lang/zh.json

@@ -1020,6 +1020,7 @@
     "lite_hide_wipe": "隐藏并清除",
     "lite_import": "导入",
     "lite_import_key_label": "导入密钥",
+    "lite_key_import_failed": "无法导入密钥——请检查密钥，解锁钱包（如已加密）后重试。",
     "lite_key_imported": "密钥已导入——运行同步以扫描其历史记录",
     "lite_lock_failed": "锁定失败",
     "lite_lock_now": "立即锁定",