Completes the wallet-files dialog and localizes the feature.
- Create a new wallet: a name is normalized to wallet-<name>.dat and opened
via switchToWallet; the daemon mints it (seed-backed, -usemnemonic=1) on
first load. Rejects blank names + name collisions.
- Import: out-of-datadir wallets get an Import action that copies the file
into the datadir (never overwriting) under a wallet-*.dat name, then opens
it — the daemon only loads plain filenames from the datadir.
- i18n: the 32 new multi-wallet / per-wallet-contacts / mining-payout strings
translated into all 8 languages (de/es/fr/ja/ko/pt/ru/zh), CJK subset font
rebuilt. Verified: the Chinese Wallets dialog renders with no missing glyphs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>