Overview\nOffline-first data capture and synchronisation layer that underpins every feature module. The PRD (§1 Document Overview + §2 Login Page) mandates the app must work in low/no-connectivity tribal-area environments.\n\n## Scope\n- Encrypted local data store for all entities (beneficiary, screening, diagnostics, confirmed, TPT, referrals, dashboard aggregates)\n- Outbox-based sync engine with conflict resolution and retry\n- Offline-first UX (connectivity banner, stale-data indicators, queue-depth badge)\n\n## PRD Reference\nConfluence page 142999594 · §1, §2 (offline requirement)