Make the iCloud gate patient and branded

Stop giving up on a slow iCloud container: a freshly enabled iCloud Drive
that reports nil while still provisioning is now polled patiently for up
to ~10 minutes instead of failing fast to the "unavailable" screen. A nil
ubiquity token (not signed into iCloud at all) still fails immediately,
and the connecting screen reveals an escape hatch at 28s for users who'd
rather jump to setup than keep waiting.

The connecting and iCloud-required screens are now branded — a purple
gradient with teal accents — and the spinner becomes a custom comet-arc
ConnectingIndicator around an iCloud glyph. Connecting copy escalates
with the wait so a slow first connect reads as steady progress.

Claude-Session: https://claude.ai/code/session_01SCv7zvGFcKy47KSTnTLxRe

CHANGELOG.md

@@ -1,5 +1,9 @@
 **June 2026**
 
+Right after you turn on iCloud Drive, Workouts now waits for it to finish coming online instead of giving up and showing the "turn on iCloud Drive" screen too soon. The connecting screen also keeps you posted as it works, letting you know the first connect can take a moment.
+
+When iCloud Drive is turned off, Workouts now shows a clearer, friendlier screen — explaining that your data lives privately in your own iCloud Drive, with no account or login, and walking you through turning iCloud Drive on.
+
 During an Apple Watch workout, lowering your wrist now keeps the work or rest timer showing its most recent count (marked with a ~) instead of a cut-off "less than a minute".
 
 Add a Workouts complication to your Apple Watch face — tap it to open the app straight from any watch face.