Ten call sites returned internal error text to clients on server failures.
Intentionally user-facing messages survive, but only through controlled
paths: 4xx service errors (err.status < 500) and explicit ApiError wraps
(notification test-send SMTP/push feedback, coded rollback errors). All
5xx bodies are now generic; internals go to the server log / audit trail.
- notifications.cts, spending.cts: full throw-pattern conversion
(CODE_STANDARDS exemplar shape; terminal handler formats + masks)
- transactions.cts: bulk-unmatch per-item results mask 500-class messages
- import.cts: sendImportError user-facing branch tightened to 4xx-only
- admin.cts: bank-sync-config + migration-rollback mask unknown failures
(QA-B13-02; full conversion of the remaining routes continues in the
standards-unification phase)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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