feat(app, frontend): split-phase endpoints, resume, player name, main-menu button

Feat : Music and Relations

Feat : Save System

Update index.html

Merge branch 'main' of https://huggingface.co/spaces/build-small-hackathon/Hackathon-IA-VisualNovel

Journal

Merge origin/main into feature/update-vocal_system

save

Add TTS

Unlock STT in frontend

Voice input: populate text field instead of auto-sending

Add STT fixes, SDXL-Lightning backend, voice UX and rembg sprite transparency

Lots of thing

Initial commit: Reorganized project structure