- Add IndexTTS-2 to Multi-Engine TTS feature list
- Add IndexTTS-2 With Emotion Control section to What's New
- Add IndexTTS-2 Model Downloads section with correct model structure
- Include proper repository links (IndexTeam/IndexTTS-2, facebook/w2v-bert-2.0)
- Document unified emotion control architecture and features
- Add comprehensive IndexTTS-2 Emotion Control Guide
