fix: clarify legacy api token recovery

feat: reveal existing api tokens for copy

feat: rotate api token on copy from list

feat: add optional api token upload restrictions

feat: add api token upload integration

feat: add dedicated cache management page

feat: allow editing file cache settings

feat: explain cache capacity in status view

feat: show file cache status metrics

fix: coalesce cold file cache fills

feat: add local file proxy cache

feat: add huggingface capacity threshold routing

fix: use lfs flow for huggingface uploads

fix: retry huggingface storage requests

feat: auto-generate runtime secrets for hf

Remove D1 and add SQLite GitHub backup for HF

feat: 适配 HuggingFace Space 单容器部署