Apple Intelligence — View Annotations + on-device narration (Tier 2, iOS 27)

[roznet]

Layer the WWDC26 / iOS 27 Apple Intelligence capabilities on top of the Tier-1 App Intents work. Everything here is additive and gated on OS/model availability — the app degrades cleanly to Tier-1 behavior on older devices.

Design: designs/ios-app-intents.md — Phase 2.

Scope (genuinely iOS-27-gated)

• View Annotations API: annotate advisory rows (AdvisoryEntity) and the briefing container (FlightEntity) so Siri can act on what's on screen:
  • ExplainAdvisoryIntent — "explain this" → advisoryDetail (mirrors MCP get_advisory_detail).
  • ShowCrossSectionIntent — "show me the cross-section" → in-app navigation.
• App Intents Testing framework — validate Siri / Shortcuts / Spotlight through real system pathways.

Rides along here (packaging choice — iOS-26-capable)

• On-device narration (Foundation Models) of the cached AdvisoryDetailResponse for offline "explain this". This capability is iOS 26; it's grouped here because its natural UX is the on-screen View-Annotations trigger. ExplainAdvisoryIntent + narration could move to Tier 1 if desired.

Acceptance

• On an AI-capable device: "explain this" on an advisory speaks the per-model reasoning; "show me the cross-section" navigates there.
• On non-AI / older-OS devices: everything degrades to Tier-1 behavior with no crash.

Depends on

• Tier-1 App Intents (entities + intents this builds on).