Module localization 

Backend localization helpers for deterministic platform-authored strings.

Decisions:

• Keep locale fallback simple: Ukrainian (uk*) or default English.
• Centralize string catalogs here so backend-authored copy stays externalized as we add more locales.
• Allowed locale and timezone lists are the single source of truth for the backend. The UI mirrors these in apps/ui/src/lib/locale-data.ts.

Structs

BackendStrings

Enums

BackendLocale

Constants

ALLOWED_LOCALES

Allowed BCP 47 locale tags. Russia excluded per policy. UI mirror: apps/ui/src/lib/locale-data.ts LOCALE_OPTIONS.

ALLOWED_TIMEZONES

Allowed IANA timezone names. Russia-specific zones excluded per policy. UI mirror: apps/ui/src/lib/locale-data.ts TIMEZONE_OPTIONS.

Functions

backend_strings

format_completed_tool_batch

format_error_suffix

format_more_actions

is_allowed_locale

Check whether a locale tag is in the allowed set.

is_allowed_timezone

Check whether a timezone name is in the allowed set.

localized_tool_display_name

resolve_backend_locale