## Summary
Adds a **Notifications** section to the account settings page
(`/settings/account`, between Profile information and Update password)
where users can opt out of the daily "new transactions synced" email.
- New per-user preference `notify_on_bank_transactions_synced` on
`user_settings` (defaults to `true`, opt-out).
- `SendDailyBankTransactionsSyncedEmailJob` skips users who disabled it.
- Single generic `PATCH /settings/notifications` endpoint updates any
notification type via a key→column allowlist in
`NotificationPreferenceController::PREFERENCES`. Future notifications
only need a new entry there — no new route/controller.
- Email footer now links back to the settings section so users can
manage preferences.
## Testing
- `tests/Feature/Settings/NotificationPreferenceTest.php` — update,
unknown-key rejection, invalid value, auth, create-when-missing,
default-true, inertia prop.
- `tests/Feature/OpenBanking/SyncBankingConnectionJobTest.php` — email
not sent when disabled.
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