SUB/WAVE iOS release → TestFlight

Cut a NEW iOS build of the SUB/WAVE app (the Expo project in `app/`) and ship it via EAS — to TestFlight, and on to the live App Store. The app is LIVE in production on the App Store, so a release is build+submit (one command) then a manual "promote to production" step in App Store Connect. Use this skill whenever the user wants to "submit a build", "release iOS again", "push a new TestFlight build", "ship the iOS app", "release to the App Store", "cut an iOS release", "build and submit for iOS", "send a new build to testers", "deploy the iOS app", "bump the iOS build", or any equivalent phrasing aimed at getting a fresh iOS build out. Trigger it even when the user doesn'…