Cloud Sync is now a paid feature: 30 credits/month (90/quarter, 360/year).
Users start in local-only mode and opt-in via Settings > Cloud Sync.
1 Credit = 1 Cent, so sync costs ~0.30€/month.
When credits run out, sync is paused (not deleted) and an in-app banner
prompts the user to top up. Local data is always preserved.
Backend (mana-credits):
- New sync_subscriptions table in credits schema
- SyncBillingService with activate/deactivate/chargeRecurring
- User-facing routes: GET/POST /api/v1/sync/{status,activate,deactivate,change-interval}
- Internal routes for server-side checks and cron triggers
Frontend (mana web):
- Sync API client + reactive sync-billing store
- syncEnabled parameter gates createUnifiedSync() — sync only starts when active
- Settings sync page with interval selection and activate/deactivate
- Pause banner in app layout when credits insufficient
Also: removed CALDAV_SYNC/GOOGLE_SYNC operations (not needed),
updated CLOUD_SYNC cost from 5 to 30 credits/month.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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