fix(api): answer an unparseable body with 400 everywhere

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`safeJson` refuses a body that will not parse with 400, and so does
`apiHandler`'s own SyntaxError branch — about two hundred and twenty
routes inherit that. Seven `/api/auth/me/*` writes hand-rolled the
parse in a try/catch and threw 422 for the identical condition, so a
client's "my serializer produced garbage" branch had to accept two
statuses on a subset of routes it had no way to predict.

All seven answer 400 now, with the sentence `safeJson` already sends
and the dotted token each one carried moved to `meta.errorCode`. The
400 is published on those seven operations through a shared response;
it is deliberately not folded into the standard set, which is spread
onto reads as well and a GET has no body to refuse.

`/api/auth/me/health-score-config` keeps its 422: the operation's own
description names that status and its exact message, so moving it is a
contract decision rather than a cleanup. The guard carries it as an
allowlist entry with that reason rather than quietly skipping it.

Three route tests pinned the old status; they assert the new one and
say why. The guard reads the hand-rolled parses out of the tree and
asserts it still finds them, so it cannot pass on a matcher that
stopped matching.

...

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Marc-André Bombeck committed 2026-09-10 07:26:32 +02:00

1 parent 9ce0bd5027

commit 3e44d68518

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+434 -191

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