First real-card tap read the NDEF file with id 0004 and got "not a Bolt
Card" — NTAG424 (Bolt Cards) use FileID E104. Read the Capability Container
(EF E103) after selecting the NDEF app to learn the advertised NDEF FileID,
then read that file; fall back to E104/0004. Tolerates a transient transmit
error (surfaced as a retryable status; the next tap re-reads).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Main-process driver over nfc-pcsc (PC/SC). On tap it reads the NTAG424
Type-4 NDEF file via ISO7816 APDUs (select NDEF app D2760000850101 →
select file → ReadBinary NLEN + message) and extracts the lnurlw voucher
(fresh SUN p/c per tap), forwarding it to the renderer on `nfc:card-tapped`
(+ `nfc:status`). Lazy, guarded import — a missing reader/pcscd just
reports 'unavailable', never breaking the cash-out QR path. Preload
removeAllListeners guards against a double payment-trigger on renderer reload.
- electron/nfc-service.ts: startNfcReader() + readNdefLnurlw()/extractLnurlw().
- electron/nfc-service.test.ts: 7 tests (NDEF URI extraction, Type-4 read
sequence incl. AID select, empty-file + select-fail handling).
- main.ts start + IPC forward; preload + electron.d.ts listeners.
- add nfc-pcsc dep (native @pokusew/pcsclite; nix build handling next).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
