The previous fix committed the hash from `prefetch-npm-deps`
(sha256-hgnqc...), but the actual `fetchNpmDeps` FOD (fetcherVersion 2)
that `nix flake check` builds wants sha256-cY+gM... . These two tools
disagree for this lockfile, so the build's npm-deps derivation failed
with a hash mismatch even though `fix-lockfiles --check` reported "ok".
Corrected to the build-verified value. Confirmed `nix build .#tui`,
`.#web`, and `.#desktop` all build cleanly with the new hash.
736dc0fd86