Enhance ContextHeaderComponent to be the single canonical header primitive:
- Add configurable heading level (h1/h2/h3) for semantic HTML in nested shells
- Add testId input for Playwright targeting (data-testid)
- Add ARIA labels on return button and chip list (role=list/listitem)
- Add back-arrow indicator for improved return-button affordance
- Add JSDoc on all inputs for developer ergonomics
Deprecate PageHeaderComponent to a thin compatibility wrapper that delegates
to ContextHeaderComponent.
Adopt canonical header on 4 representative pages:
- RegistryAdminComponent (admin/setup surface)
- PackRegistryBrowserComponent (operational surface)
- DeadLetterDashboardComponent (operational surface)
- OfflineKitComponent (operational surface)
Each adopted page gains eyebrow breadcrumb context, consistent subtitle
placement, and projected actions via the shared header-actions slot,
replacing ~80 lines of repeated ad-hoc header markup.
15 focused component tests covering title rendering, eyebrow/subtitle
display, chips with ARIA, back action, action slot projection, heading
levels, testId, and responsive layout structure. All pass.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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