Add Fish Audio to README with billing requirement note

Fix duplicate TTS with content-based dedup and add Fish Audio provider

Fix tts-stop not killing say/afplay orphan and grandchild processes

Fix duplicate TTS playback from concurrent hook invocations

Bump version to 2.3.1 with TADA in marketplace metadata

Add Hume TADA as TTS provider (open-source voice cloning)

Bump version to 2.3.0 with MiMo TTS in marketplace metadata

Add Xiaomi MiMo-V2-TTS provider support

Add daemon-level lock to prevent concurrent audio playback

Fix duplicate TTS playback from multiple hook registrations

Fix zsh glob expansion error when no audio files exist

Add TTS stop playback support (v2.2.0)

Fix Kitten TTS voice names for KittenTTS 0.1.3 compatibility

Auto-install Kitten TTS dependencies during setup

Add Kitten TTS V0.8 provider (free, local, no API key required)