Groundwork for offline pass-and-play (hotseat) seat/host PIN locks:
- lib/pin.ts: salted SHA-256 PinLock (newSalt/hashPin/newLock/verifyPin);
a social lock for a shared device (documented, not cryptography).
- components/PinPad.svelte: 4-digit keypad (set/verify/change), auto-submit
on the 4th digit, shake on mismatch, hardware-keyboard support.
- i18n: pin.* keys (en + ru).
Engine/source/UI wiring follows.
Ilia Denisov