Changelog

Modu Parking start-payment now matches the current webapp payment payload for shared NaverPay/NicePay and standard ticket payment URL creation.

modu-parking/start-payment now mirrors the current Modu Parking frontend payment request shape more closely:

Send shared-parking using_time from check-availability slots[].using_time_minutes. Decimal digit strings are still accepted for compatibility, but booleans, arrays, exponent strings, and empty values are rejected. If you have a Modu webapp guestSeq from URL/storage, pass it as guest_seq; otherwise the operation uses the current webapp default of 0.