The upload password gate can now be skipped with a bookmarkable
#psst=<sha256-hash> fragment instead of typing the password each time.
The server accepts either the plaintext password (X-Upload-Password) or
its SHA-256 hash (X-Upload-Password-Hash), compared timing-safely. The
client computes the hash locally after a normal password entry, so the
bypass link never contains the real password — only a one-way digest of
it, kept out of the URL query string (and thus server logs) by living in
the fragment, same as the decryption key.
Client-side libsodium encryption with the key in the URL fragment, an
Express/SQLite server holding ciphertext until a confirm-token round trip
proves successful decrypt (avoiding the delete-on-first-byte race), TTL
sweep for unclaimed drops, and a password-gated upload UI styled to match
flit. Dockerized to match the project family's conventions, with a named
volume so the DB/blobs survive redeploys, and a Gitea Actions workflow to
build and push the image.
