Central mapping from error atoms (returned by the Manufacturing module's public API and used across its LiveViews) to translated human-readable strings.

Keeping UI-facing copy in one place means every "not found" or "delete failed" flash reads the same wording. Callers pattern-match on atoms; message/1 wraps each mapping in gettext/1 at the UI boundary.

Supported reason shapes

• plain atoms — :machine_not_found, :type_assignment_failed, etc.
• strings — passed through unchanged
• anything else — rendered as "Unexpected error: <inspect>"

Example

iex> PhoenixKitManufacturing.Errors.message(:machine_not_found)
"Machine not found."