Restore Slack local file upload parity with CVE-era local media allowlist enforcement by threading `mediaLocalRoots` through the Slack send call chain.
- pass `ctx.mediaLocalRoots` from Slack channel action adapter into `handleSlackAction`
- add and forward `mediaLocalRoots` in Slack action context/send path
- pass `mediaLocalRoots` into `sendMessageSlack` for upload allowlist enforcement
- add changelog entry with attribution for this behavior fix
Co-authored-by: 2233admin <1497479966@qq.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>
7830366f3c