espressif/idf:release-v5.3 has no Node.js, and actions/checkout (a Node
action) runs inside whatever container: the job specifies -- it failed
immediately with "node: not found" on the first real run. Checkout now
runs on the plain runner; only the two build steps spin up the ESP-IDF
image themselves via docker run, using the runner's already-mounted
docker socket.
New Gitea Actions workflow builds both board variants and publishes
them as release assets whenever firmware/version.txt is bumped. The
server can now poll that repo's releases (next to the existing manual
upload) and either surface an "Update frame" button or, with
"Automatically apply updates" checked, stage the new build itself --
the frame still only updates on its own next wake either way.
tfaour