- resolve_credential (+ token_credential / password_fields helpers)
extracted out of put_matrix_account, which was tripping
clippy::too_many_lines (101/100). Both helpers surface plain &str
errors rather than ProblemDetails to dodge clippy::result_large_err on
a private fn (put_matrix_account itself is exempt only via clippy's
avoid-breaking-exported-api default, which does not cover these);
resolve_credential boxes its own ProblemDetails Err for the same
reason, unboxed at its one call site.
- Added unit tests for the extracted logic: main-reserved, token-mode
missing-token / pass-through, password-mode missing-fields / trailing-
slash trim, and two async resolve_credential end-to-end checks
(token mode, unknown mode) that need no network access.
- Dropped PutMatrixAccountRequest's Debug derive to match
hive-c0re::dashboard::matrix_accounts::MatrixLoginForm's existing
precedent of not deriving Debug on a struct carrying a password field.
ec67d2dd36