feat(schemas, config): add remember_fact directive, ViewState.history, IMAGE_VAE

chore(reformat): reformat existing code with ruff.

Make IMAGE_MODEL/LORA defaults backend-aware

Auto-detect HF Space env; fix image dependency check

Merge origin/main into feature/update-vocal_system

save

Add TTS

Fix backdrop character bleed: guidance scale + cleaned style prompt

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

Lots of thing

Initial commit: Reorganized project structure