[dashboard-language] Built-in pages: overview linked findings and timeline coverage

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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

Summary

• milestone: Built-in pages
• implemented conservative DLS-PAGE-002 validation for overview built-in definitions covering linked findings and operational-value timeline coverage
• updated the positive built-in coverage fixture and added a negative overview fixture for omitted finding links and omitted operational-value-definition

Specification coverage

• Section 10 Built-in Pages
• Requirements: DLS-PAGE-002, DLS-PAGE-014

Gates

• npm install: passed
• npm run typecheck: passed
• npm run lint: passed
• npm test: passed
• npm run test:e2e: blocked by infrastructure (browserType.launch: Executable doesn't exist for Playwright Chromium)

Blockers

• Playwright package-level browser executable is not provisioned in this environment, so local npm run test:e2e cannot complete.

Next milestone

• Built-in pages: conservative validation of overview provenance and freshness exposure obligations without inventing presenter semantics.

Generated by 🧩 Daily Dashboard Language Renderer · pi · gpt54 · 39 AIC · ⌖ 7.71 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