- Add bin/api/ package with generate_image() and synthesize_tts()
- Refactor bin/commands/image.py to call bin.api.image.generate_image
- Refactor bin/commands/voice.py to call bin.api.voice.synthesize_tts
- API layer is free of Click CLI dependencies, usable by external scripts
- Add voice/TTS CLI command via Volcengine WebSocket API
- Inject suppressAutoHyphens into all docx paragraphs in post-process
- Apply post-process fixes to all templates (not just default)
- Update review template: Cambria+SimSun fonts, 11pt for headings
- Sync default/review docx template formatting