Sets the bn-theme cookie + emulated prefers-color-scheme before navigation
so each page can be captured in both color modes (Wave B screenshot sets).
Mode-suffixed filenames (NN-<slug>-<mode>.png); empty --modes keeps the
old single site-default capture and naming.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The ninja developer CLI moves out of block/core into its own module
git.dev.alexdunmow.com/block/cli. Pins block/core@v0.18.2 for abi/v1, the
plugin.mod parser, and DESCRIBE guest builds; vendors its own orchestrator
registry client (internal/api, generated from a vendored plugin_registry.proto)
since it cannot import block/core/internal. Produces byte-identical v1
artifacts (verified: art-deco codeless SHA256-identical to the pre-move build).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
