Add a FeatureFlags config section with a session_sandboxes boolean
(default false) to both the Rust server config and web app config.
Gate the project/branch picker UI behind this flag. Set it to false
in the Docker demo config.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Multi-stage Dockerfile builds Rust API binary and bundles the web app
and docs into a single image. docker-compose.demo.yaml orchestrates
the three services (api, web, docs) with a shared entrypoint router.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implements ExecutionEnvironment trait backed by Docker containers via
bollard. Host working directory is bind-mounted; all file ops, commands,
grep, and glob execute inside the container via docker exec. Extracts
shared format_lines_numbered() helper from LocalExecutionEnvironment.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
