Flutter Local Notifications Production Engineering

Treat flutter_local_notifications as a platform-notification integration boundary, not a business scheduler, durable job engine, or proof that business logic executed.

Use this model:

durable business notification intent
→ platform capability + permission policy
→ stable notification identity + payload
→ OS scheduling/presentation
→ lifecycle response
→ validated application intent
→ authoritative auth/data check
→ route/action