The decompiled client's DoMatchingBase.SettingCardMasterId calls
jsonData["card_master_id"].ToInt() with no Keys.Contains guard when
matching_state ∈ {3004, 3007, 3011}. Omitting the field crashes the
client with KeyNotFoundException at Cute.NetworkManager+Connect.
Add CardMasterId to DoMatchingResponseDto with a default value of 1
(matching the /load/index response and prod captures). Extend the
controller test to assert the field is present.
Caught during the v1 smoke walk-through; full client log line:
[Error: Unity Log] KeyNotFoundException: The given key was not
present in the dictionary.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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