feat: add iPhone Storage and Cleanup pages to ring carousel
Replaces the 4-page in-ring stat cycling with 3 full-page views:
- Page 0 (BACKUP): existing ring + status + NAS cards + CTA
- Page 1 (IPHONE STORAGE): StorageRingView with orange used/green
safe-to-delete arcs, 3-col GB stats, legend, "HOLD TO CLEAN" button
- Page 2 (CLEANUP): freed GB hero, category breakdown bars (backed-up
photos, duplicates, screenshots, large videos), "DONE" button
Adds ← PAGE NAME → navigation bar replacing the dot indicator.
SwipeGesture now shared via pageSwitchGesture applied per page hero.
Co-Authored-By: Kutesir <kutesir@provoc.ug>
Co-Authored-By: Sentry <sentry@provoc.ug>
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