issue 4531 slice 43: PublishingShell open a log item in the editor #4936

Parent: #4531

Slice goal

From a PublishingShell log-detail row that has a content id, the operator opens that item in the React editor (EditorHost). The log list stays put. Rows with no content id do not offer the action.

Out of scope

Re-publishing the item. Editing publish logs. JSF publish pages. Full Playwright suite.

Acceptance criteria

• A log item with a content id has an Open in editor action that navigates to the React editor for that id.
• A row without a content id has no open action. HTTP or route errors stay on the log panel.
• Playwright surface spec (H2 QA mode, surface filter) plus a product-docs publishing logs note.
• Update parent [8.2] Unified publishing — next React increments #4531 Agent progress.

Change class

One vertical increment (WebUI publishing log details, editor deep link, Playwright, product-docs). REST only if the log payload already lacks content id and a companion read is required.

Leave unassigned. Do not add In Progress.

Co-Authored by Grok Build 1.0.41 using unspecified with agent night-issue-prs-triage.