[dashboard-language] Built-in pages: overview provenance and data-state render slice

[github-actions]

Caution

Protected files were modified in this change.
This pull request is in request_review mode and requires explicit human scrutiny before merge.

Protected files: README.md

Milestone

Built-in pages

What shipped

This increment adds a browser-rendered prototype slice for the overview built-in page.

• Added pages/dashboard/src/presenter.js, a tiny built-in page presenter that renders:
  • page headings,
  • independent availability, completeness, and freshness summaries, and
  • per-source provenance entries derived from declarative built-in definition.views and runtime source metadata.
• Replaced the static smoke test with a Playwright browser test that renders an overview built-in page and verifies independent data-state text plus provenance output.
• Added validator acceptance coverage showing that overview built-in definitions can conservatively carry source-metadata-bearing views for this slice.
• Updated pages/dashboard/PLAN.md and pages/dashboard/README.md for the new built-in rendering increment.

Specification coverage

• Section 10 Built-in Pages
  • DLS-PAGE-002
  • DLS-PAGE-014
• Section 12 Validation and Errors
  • existing validator behavior exercised by the new acceptance fixture

Gates

• npm install ✅
• npm run typecheck ✅
• npm run lint ✅
• npm test ✅
• npm run test:e2e ⚠️ blocked by infrastructure: Playwright Chromium executable is not provisioned in this environment (browserType.launch: Executable doesn't exist)

Blockers

• Browser end-to-end tests are authored and included, but local Playwright execution is blocked here because the Chromium binary is unavailable.

Next milestone

Built-in pages — render one additional Section 10 built-in page from declarative definitions rather than only validating its coverage.

Generated by 🧩 Daily Dashboard Language Renderer · pi · gpt54 · 44.6 AIC · ⌖ 10 AIC · ⊞ 5.4K · ◷

[github-actions]

Protected files were modified in this pull request and require manual scrutiny before merge.

Please verify that each protected-file change is intentional, policy-compliant, and safe:

• Protected files: README.md

[pelikhan]

@copilot fix https://github.com/githubnext/central-agentic-ops/actions/runs/33226043170/job/99030509174#step:9:1

[Copilot]

@copilot fix https://github.com/githubnext/central-agentic-ops/actions/runs/33226043170/job/99030509174#step:9:1

Fixed in 3f420ba. The browser fixture no longer shadows the DOM document, and the Overview locator is exact. Dashboard E2E, unit tests, lint, and typecheck pass.