`POST /player/shard/account` and its staff twin have answered 500 for every
caller since slice 1: the ported controller called
`settings.isGameAccountSignupEnabled()`, which is a member of core's settings
model and not of `ctx.settings` — three functions, deliberately. The call was
`undefined(...)`, the TypeError landed in the catch, and no test reached the
branch.
The gate now lives on the side that uses it (`utils/gameSignup.js`), which is
also where the policy belongs: the setting's own help text names Bridge.cfg and
says the shard's SignupMode must agree, and core cannot own a sentence about a
UO shard. The admin field moves to this module's Shard page and the derived
flag onto `/public/shard/features`, beside the visibility flags the same
callers already read.
The setting KEY is unchanged. Renaming `game_account_signup` would silently
reset every configured instance to `disabled` on upgrade, with players
reporting broken signup as the only clue — the same grandfathering as
`spawn_atlas_servuo_path` and the seven stream ids.
Both regression tests were shown to fail against the bug before it was fixed.
Co-Authored-By: Claude <noreply@anthropic.com>
