Foundation for 2.1 family sharing (CKShare needs these models + container).
SwiftData cannot share across Apple IDs today, so 2.0 ships true multi-device
sync for the same account instead:
- Models made CloudKit-compatible: dropped @Attribute(.unique) on all 5,
inline defaults on every attribute, WeekPlan.slots stored as optional
relationship (name preserved → lightweight migration) with non-optional
slotList facade; ~73 call sites renamed.
- Container: cloudKitDatabase .automatic, falling back to the local-only
store when CloudKit is unavailable; failures recorded to Crashlytics.
- Entitlements: iCloud CloudKit service (container already existed);
remote-notification background mode for push-driven sync.
- Legacy KV snapshot sync (ICloudSyncService) stays inert when CloudKit is
active — kept only for 1.x devices.
- DeduplicationService collapses cross-device duplicates deterministically on
launch (settings singleton, default tags with tagId remapping, same-week
plans).
- Note: AppSettings.isPremium now syncs across same-Apple-ID devices; StoreKit
(PremiumSyncService + Transaction.updates) remains the source of truth and
reconciles on every launch/foreground.
All 21 unit tests pass, including ICloudSyncPremiumIsolationTests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BkanrydYtrme8wipTzWssG
alexandrev-tibco
4ffa15b06a