/**
 * Resolve a caught error to a localized, user-facing message.
 *
 * Capture the active translator at call site (run this in `setup()`, before
 * any `await`), then use the returned async resolver. Lookup order:
 *
 * 1. **Field-level validup `issues`** (a validation failure) — translated
 *    via `@ilingo/validup`'s `translateIssues` (the same machinery that
 *    renders inline form-field errors), so the toast is both localized and
 *    field-specific instead of a generic "bad request" line.
 * 2. **Top-level `code`** — resolved against the `authupError` namespace
 *    (e.g. `permission_denied`, `entity_conflict`).
 * 3. **Raw server message** — last resort for non-HTTP / uncoded errors.
 */
export declare function useErrorTranslator(): (error: unknown) => Promise<string>;
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