Uploads only reached internal testers. The public link's "external" group
still served 0.1.66, because nothing added later builds to it or
submitted them for Beta App Review.
A new `public-testflight` job runs after the upload on a Linux runner.
It waits for App Store Connect to process the build, adds it to the
external group, sets "What to Test" to the GitHub release and submits
it for review (`scripts/testflight-public.mjs`, safe to re-run). The
README links the TestFlight beta and the latest APK.
Linus Rath