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

feat(ZeroGPU) : Fix HuggingFace logs error.

chore(reformat): reformat existing code with ruff.

Feat : Music and Relations

Feat : Save System

Auto-detect HF Space env; fix image dependency check

Merge origin/main into feature/update-vocal_system

save

Add TTS

Lots of thing

Fix quiet_stderr for windows user

Fix uv packages sync and download automation

Initial commit: Reorganized project structure