flutter_gemma_speech 0.4.0

On-device speech (STT + TTS) for flutter_gemma via the LiteRT C API + dart:ffi. Opt-in Stt/TtsBackendProvider.

0.4.0

• feat: on-device Whisper-tiny STT (English-only) — log-mel frontend + GPT-2 BPE decode.
• feat: on-device Parakeet-CTC STT (desktop) — NeMo mel frontend + greedy CTC decode.

0.3.0

• Add VoiceSession — on-device push-to-talk voice loop (STT → LLM → TTS) with barge-in.
• feat: robust TTS text frontend — punctuation-as-symbols, numbers/acronyms, neural OOV G2P, clause chunking.
• fix: model-agnostic TTS chunking — word-boundary + duration-aware split so long replies fit MAX_TEXT/MAX_MEL.

0.2.0

• Add on-device TTS (Matcha): installTts/getActiveTts, selectable model, PCM output.

0.1.0

• feat: on-device STT (moonshine-tiny) via LiteRtSttBackend + a generic, selectable SttModelProfile pipeline (encode → greedy decode → HF detokenize) on the shared LiteRT engine.