The #682 port is merged; add its env to release.sh, a flasher manifest, a
card under Seeed Studio on wadamesh.com (experimental, community port, no
device updates) and the README. The site card points at the beta feed, so
deploy the site after the next beta publishes. Board count 16.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>