web: port live Spec 001 presentation to primary shells

[enricopiovesan]

Summary

• Port A1 live Spec 001/002 presentation updates to doc-approval, meeting-notes, and loop web (shared event-ui-conformance helpers + onPresentation during submit).
• Dedupe Trace Explorer sessionPresentation onto the package adapters.
• Unit tests assert mid-stream loading before terminal loaded on each host.

Governing Spec

• Specs 001 / 002
• Public embedder subscribe/submit only; UI remains a rendering layer

Project Item

• Ticket ID: web-session-presentation-port-primary
• Project item: PVTI_lADOEbiBt84BbzAzzg5tI_c
• Depends on: web-session-presentation-shared (web: shared Spec 001 session presentation helpers #299)

Definition of Done

• Primary web shells notify/render Spec 001/002 fields from each subscribed event during submit
• Trace Explorer uses package helpers
• Mid-stream loading covered in host unit tests
• No forced yield; no business-field invention
• Tests/typecheck green for touched workspaces

Validation

npm run test -w apps/doc-approval/web-react
npm run test -w apps/meeting-notes/web-react
npm run test -w apps/loop/web-react
npm run test -w apps/trace-explorer/web-react
npm run typecheck -w apps/doc-approval/web-react
npm run typecheck -w apps/meeting-notes/web-react
npm run typecheck -w apps/loop/web-react
npm run typecheck -w apps/trace-explorer/web-react

Test plan

• Host unit tests: loading → loaded callback sequences
• Existing happy/error/reject paths still pass
• Trace Explorer observe/map tests pass (incl. loading)

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