Task 12 report

Mapping

Source editor save workflow → pending/success announcements, fresh per-command idempotency keys, retry after request failure, and revision-conflict state without replacing the local draft.
Source guarded Studio links/provider/dialog → all internal Studio anchors use the guarded <a> DOM; dirty navigation offers stay, discard, and save-then-navigate with modal focus/trigger restoration and native beforeunload protection.
Source validation report/screen → saved-version validation gates, current/stale freshness copy, error-before-warning issue order, exact JSON-pointer editor anchors, retry/not-found surfaces, and abortable route reads.
Source Public Preview screen → missing/current/stale/expired states, exact next-action labels, idempotent preview creation, retry/not-found surfaces, and the shared typed PublicRecordRenderer.
Route pages → existing route-input codecs supply the validation/preview document ID; no publish/history/snapshot behavior was pulled forward.
Task 10/11 seam → provider gained only dirty-navigation/time state, editor gained the save callback, and existing Studio links were switched to the newly available source guarded-link component.

RED: corepack pnpm exec vitest run tests/features/tech-log/studio-save-navigation.test.tsx tests/features/tech-log/studio-validation-preview.test.tsx exited 1 before collection at the intentionally missing guarded-studio-link.tsx and public-preview-screen.tsx imports (2 failed files, 0 tests).
GREEN: the two workflow suites plus tests/features/tech-log/mock-studio-gateway.test.ts passed 3 files / 22 tests.
Focused seam regression: those three files plus the existing Studio shell, screen, and editor suites passed 6 files / 35 tests.
Scope check: git diff --check passed.

Added guarded link, unsaved dialog, beforeunload hook, validation report/screen, Public Preview screen, and validation/preview route pages under src/features/tech-log/presentation/studio/.
Extended the Task 10 provider/context and Task 11 editor/status rail; updated existing Studio internal link consumers to use the source guard.
Added studio-save-navigation.test.tsx and studio-validation-preview.test.tsx.

Base: 59332659752ee17c095471d06e7f0fc8b00c89b4.
Implementation: the commit containing this report, titled feat: port TechLog Studio validation workflow (final SHA recorded in the Task 12 handoff).

Publish, republish, unpublish, publication history, warning acknowledgement, and immutable publication snapshots remain deferred to Task 13.
Broad browser-security, app/test types, lint, build, architecture, visual, and full-suite gates remain deferred to integrated Task 14 by user direction.