{
  "ok": true,
  "admin": "https://pic.ywz.workers.dev/admin",
  "limits": {
    "max_file_mb": 50
  },
  "naming": "R2 key uses local relative path + filename; duplicates append -1, -2, ...",
  "endpoints": {
    "upload": "POST /upload",
    "image": "GET /i/<key>"
  }
}