Function normalizeGcpTtsVoices

normalizeGcpTtsVoices(raw: unknown): GcpTtsVoicesMap
Normalizes a stored or request voices map to trimmed language → voice entries.
Parameters
- raw: unknown
  Unknown payload (object, Map, or null).
Returns GcpTtsVoicesMap
Clean map (empty when invalid).
- Defined in lib/translation/gcp-tts-voices.ts:128