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- SyncPreferences() method on Notifier: POST to hub /api/v1/preferences - IsEnabled() getter for hub connectivity check - settingsNotificationsHandler: sync to hub after local save (3 flash message variants) - Startup sync: non-blocking goroutine pushes prefs to hub on boot (DB rebuild recovery) - Updated CONTEXT.md, README.md with v0.7.2 changes Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>