feat(wallets): show "HD wallet" instead of "?" when the seed flag is unreadable

When a row is probed as an HD wallet (has hdseed/hdchain records) but the
mnemonic flag can't be read — e.g. the rare tier-1 byte-scan fallback on an
unusual BDB variant or a >256 MB file — it now shows a neutral "HD wallet"
badge (ICON_MD_ACCOUNT_TREE) rather than a bare "?", which read as alarming.
"Unknown" (?) is reserved for a scan that couldn't even establish it's HD
(incomplete, no HD marker seen). Both still yield to the Lock badge when
encrypted. Seed/legacy/hd/unknown remain mutually exclusive.

Adds wallets_badge_hd / _hd_short strings (EN source + all 8 languages,
additive) and rebuilds the CJK subset font for the new glyphs.

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

src/util/i18n.cpp

@@ -276,9 +276,11 @@ void I18n::loadBuiltinEnglish()
         strings_["wallets_badge_seed"] = "Seed phrase wallet (HD)";
         strings_["wallets_badge_legacy"] = "Legacy wallet (no seed phrase)";
         strings_["wallets_badge_unknown"] = "Wallet type not fully determined (large file — open to confirm)";
+        strings_["wallets_badge_hd"] = "HD wallet — can't confirm a seed phrase without opening it";
         strings_["wallets_badge_seed_short"] = "Seed phrase";
         strings_["wallets_badge_encrypted_short"] = "Encrypted";
         strings_["wallets_badge_legacy_short"] = "Legacy";
+        strings_["wallets_badge_hd_short"] = "HD wallet";
         strings_["wallets_badge_unknown_short"] = "Unknown";
         strings_["wallets_open"] = "Open";
         strings_["wallets_open_folder"] = "Open folder location";