- Add simple_api.py: profile-based API that wraps GPT-SoVITS TTS engine
- Add /api/tts endpoint for MVP: accepts ref audio/video, text, optional aux audio
- Frontend auto-extracts audio from uploaded video files via Web Audio API
- Add emotion presets (neutral/happy/calm/sad/angry) with speed customization
- Add test_frontend/index.html with health check, audio playback, and download
- Add contract tests (7 tests, all passing) using mock TTS pipeline
- Add documentation: simple_api.md (full tutorial), simple_api_quickstart.md
- Add startup scripts: go-simple-api.ps1, go-simple-api.bat, open-test-frontend.ps1
- Add soundfile and python-multipart to requirements.txt
- Text splitting fixed to cut5 (punctuation-based) per MVP spec
