migration start

tasks/native-business-logic-migration/20-implement-linux-background-sync.md

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+# 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