feat(backup): add automatic weekly encrypted backups

A silent safety net against in-app data loss or DB corruption, with zero
friction. Driven off the app lifecycle (startup + when hidden), it writes a
sealed .tanemaki copy into the app's private storage once a week, keeping the
newest 3 (rotating). Reuses the manual backup's encryption via the extracted
ExportImportService.buildSealedBackup(); never throws, so a failed copy can't
crash startup or backgrounding. Not registered on web (no file storage).

Settings shows a quiet reassurance line with the date of the last automatic
copy (localised via intl), hidden where no automatic backup exists.
This commit is contained in:
vjrj 2026-07-10 10:17:36 +02:00
parent cf6975b748
commit 9c449964fd
19 changed files with 559 additions and 29 deletions

View file

@ -46,6 +46,9 @@
},
"backup": {
"title": "Cópia de segurança",
"autoBackupTitle": "Cópias automáticas",
"autoBackupLast": "Última cópia guardada em {date}",
"autoBackupNone": "Uma cópia é guardada automaticamente em segundo plano",
"exportJson": "Guardar uma cópia de segurança",
"exportJsonSubtitle": "Uma cópia completa para guardar em segurança, restaurar depois ou levar para outro aparelho",
"importJson": "Restaurar uma cópia",