Every mutating form now carries the CSRF token as a hidden field, and the upload route accepts it as a multipart field as well as a header. Driving the real UI in Firefox found what the header-only tests could not: Create Draft, Save, Publish, Delete and the up/down buttons all posted without a token and were rejected. Adds npm run check-site, which verifies a running Site from the outside and exits non-zero so it can gate a cutover.