# 20. Implement Linux background sync service

meta:
  id: native-business-logic-migration-20
  feature: native-business-logic-migration
  priority: P1
  depends_on: [native-business-logic-migration-17]
  tags: [implementation, linux, background]

objective:
- Implement background feed sync using GIO Timeout or systemd timer

deliverables:
- background-sync.vala
- sync-scheduler.vala
- systemd service file
- systemd timer file
- Desktop entry with autostart

tests:
- Unit: Test scheduler configuration
- Unit: Test timeout handling
- Integration: Test background execution

acceptance_criteria:
- Sync runs on schedule
- Battery-efficient (only when active)
- Proper cleanup on app close
- State persisted between runs

validation:
- Test with systemd-timer list
- Verify with journalctl

notes:
- Use GTimeout for in-app scheduling
- Use systemd timer for system-level
- Respect power management