API: ai/nlu-voice-wasm

@mosaicoo/svg-engine/ai/nlu-voice-wasm provides 100% local, offline speech-to-text via Whisper (transformers.js + onnxruntime-web WASM). It’s a heavy, opt-in entry point — the ML dependencies load lazily, only when voice is actually used. No Angular Material/CDK dependency.

import { provideWhisperVoiceEngine } from '@mosaicoo/svg-engine/ai/nlu-voice-wasm';

Wiring it up

Register the engine in your app providers; VoiceEngineService (from ai/nlu-ui) then discovers it as the whisper engine.

API	Description
`provideWhisperVoiceEngine(config?)`	The complete bootstrap: registers the config and `WhisperVoiceService` as the `VOICE_WHISPER_PROVIDER`. Put it in your root `providers[]`.
`provideWhisperVoice(config?)`	Registers just the config (merged with the defaults).
`WhisperVoiceService`	The provider itself — same `VoiceProvider` contract as the Web Speech one, but transcribing on-device: `listen(lang?, options?)` records (with voice-activity detection) and transcribes locally; `isSupported`/`listening`/`modelLoading`/`lastError` signals. Multilingual (PT-BR / ES / EN).
`WHISPER_VOICE_CONFIG` / `DEFAULT_WHISPER_VOICE_CONFIG`	The config injection token and its defaults.

Configuration

WhisperVoiceConfig controls the model, the WASM runtime and the voice-activity-detection behaviour:

Field	Default	Meaning
`modelBasePath`	`/assets/ml/whisper`	Where transformers.js loads the model from.
`modelId`	`whisper-small`	Model folder (e.g. `whisper-base`, `whisper-small`).
`wasmBasePath`	`/assets/ml/ort/`	Where the onnxruntime `.wasm` binaries are served.
`dtype`	`q8`	Model quantization (`q8`/`fp32`/`fp16`/…).
`numThreads`	`1`	WASM threads (1 avoids the COOP/COEP requirement).
`defaultLanguage`	`pt`	BCP-47 language used when the caller omits one.
`maxRecordMs`	`15000`	Max capture length before auto-stop.
`silenceMs` / `silenceThreshold`	`1000` / `0.015`	Voice-activity detection: silence duration and RMS energy threshold to auto-stop after speech.
`noSpeechTimeoutMs`	`6000`	Give up if no speech is detected.