Promote to production: Text-to-Speech neural download + pauses - #274
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Browser (OS) voices can't be recorded, so this adds an on-device neural TTS (MMS-TTS via @huggingface/transformers, loaded through the same /hf proxy as Whisper) that generates real audio samples. Users can play the result, download WAV or MP3 (lamejs), and insert pauses with [pause] markers or blank lines (silence spliced into the buffer). OS-voice playback is unchanged. Pure tts-audio.lib.ts (WAV encode, PCM, silence, pause-split) unit-tested. New dep: @breezystack/lamejs.
feat(tts): on-device neural voice — WAV/MP3 download + pauses
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Adds an on-device neural voice to TTS with WAV/MP3 download and [pause] support.