feat(loop): WF1 multi-OS reference app scaffold

[enricopiovesan]

Summary

• Scaffold apps/loop/ across all seven OS clients (web, iOS, macOS, Android, Windows, Linux GTK, CLI) for Spec 003 WF1.
• Compose WF1 via registry_ref digests (ingest / extract / normalize / authorize) plus in-repo loop.wf1 workflow overlay.
• Extend bundle sync materialize for core.* capabilities; register CI/nightly/docs/README touchpoints; web human-review chrome on blocked.

Governing Spec

• docs/specs/003-loop-wf1-reference-app/spec.md (Approved)
• ADR docs/adr/0003-loop-wasm-from-registry-only.md
• Specs 001/002 event-UI conformance
• docs/loop-registry-deps.md

Project Item

• Ticket ID: loop-wf1-multi-os
• Item: PVTI_lADOEbiBt84BbzAzzg2Jmec

Definition of Done

• apps/loop/{web-react,ios-swift,macos-swift,android-compose,windows-winui,linux-gtk,cli-rust}/
• Manifests + four registry_ref components + in-app WF1 workflow
• Sync wrappers + materialize map for core WF1 caps
• Spec 001/002 presentation wiring retained from meeting-notes scaffold
• Human review panel when presentation is blocked (web)
• README / design-language / repository checks / CI + nightly registration

Validation

• bash scripts/ci/repository_checks.sh — PASS
• npm run test -w apps/loop/web-react — 18 passed
• npm run typecheck -w apps/loop/web-react
• cargo test -p loop-core-rs -p loop-cli (in apps/loop) — passed
• Native bundle sync with TRAVERSE_REPO for android/swift/winui

Test plan

• CI green (repository-checks, quality, coverage, embedded-smoke, native-linux loop cargo)
• Spot-check web ReviewPanel with blocked fixture
• Confirm digests in docs/loop-registry-deps.md still match registry

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