feat: meeting-notes Wave 2 — iOS, macOS, Windows, Android embeds

[enricopiovesan]

Summary

Ship meeting-notes Wave 2 OS ports: embedded iOS, macOS, Windows, and Android clients using the add-platform recipe and meeting-notes.process / registry_ref process component. Mirrors the doc-approval twin pattern with transcript input and runtime-owned action items / decisions / follow-ups / summary.

Governing Spec

• docs/production-playbook.md, docs/add-platform-client.md, docs/runtime-bundle-sync.md
• Public embedder APIs only (TraverseEmbedder Swift / Kotlin / .NET)
• UI-only architecture boundary — no local business-field computation

Project Item

• Ticket ID: meeting-notes-wave2-os-ports
• Title: meeting-notes Wave 2: add Apple, Windows, and Android embedded clients
• Status: In Progress (Agent: Cursor)

Definition of Done

• iOS + macOS + Windows + Android meeting-notes clients embed runtime
• Sync wrappers / digests follow runtime-bundle-sync (sync_swift_meeting_notes_bundle.sh, sync_android_meeting_notes_bundle.sh, sync_winui_meeting_notes_bundle.sh)
• Tests use host SDK doubles only (InMemoryTraverseEmbedder / platform equivalent)
• Docs/README + design-language rows updated
• embedded_smoke covers meeting-notes digests (skip-with-reason when toolchain/host unavailable); nightly adds macOS/Android/WinUI jobs

Validation

• bash scripts/ci/repository_checks.sh
• Android / WinUI unit tests use in-memory host fixtures (run on nightly with TRAVERSE_REPO / Windows host)
• Swift: cd apps/meeting-notes/MeetingNotesCore && swift test (Darwin nightly)
• Digest pins present under each platform bundles/meeting-notes/runtime/

Checklist

Traceability

• Project 2 ticket updated (Agent + Status); Ticket ID cited above
• Updated README.md / docs/design-language.md platform rows if shipping status changed
• Updated AGENTS.md blocked-work summary only if Project 2 Blocked set changed

Production baseline (platform / runtime-client PRs)

• Embedded mode — production path uses in-process public embedder (no required traverse-cli serve)
• Digest pin / sync — runtime/runtime-release.json pin followed; sync wrappers added per docs/runtime-bundle-sync.md
• SDK test doubles — unit tests use public embedder doubles; no faked business fields in app code
• Docs touchpoints — platform README Runtime mode + README / design-language shipping rows updated
• CI commands — listed under Validation; repository checks + embedded_smoke digest coverage

Architecture

• No business logic added to UI layer
• No private Traverse internals imported
• CI gates pass locally where applicable (repository_checks)