Extract backup & restore into a standalone AccordionItem in Advanced settings.
Add configurable auto-backup interval (disabled/6h/12h/24h/48h/7d) and retention
count (3-50) via settings. Add per-backup rename with inline editing UI.
Four improvements to the database backup mechanism:
1. Auto backup before schema migration - creates a snapshot when
upgrading from an older database version, providing a safety net
beyond the existing SAVEPOINT rollback mechanism.
2. Periodic startup backup - checks on app launch whether the latest
backup is older than 24 hours and creates a new one if needed,
ensuring all users have recent backups regardless of usage patterns.
3. Backfill failure notification - switch now returns SwitchResult with
warnings instead of silently ignoring backfill errors, so users are
informed when their manual config changes may not have been saved.
4. Backup management UI - new BackupListSection in Settings > Data
Management showing all backup snapshots with restore capability,
including a confirmation dialog and automatic safety backup before
restore.
Jason