Task 1: Replace hardcoded VoiceLister bypass in get_voices()
- Use PluginManager → Engine → VoiceLister instead of direct imports
- No more hardcoded imports of plugins.kokoro.engine / plugins.supertonic.engine
Task 2: Remove SuperTonic Plugin dependency on legacy backend
- Create self-contained plugins/supertonic/pipeline.py
- Plugin no longer imports from abogen.tts_backends
Production code now has zero imports from:
- abogen.tts_backend
- abogen.tts_backend_registry
- abogen.tts_backends
