[dashboard-language] Security, privacy, accessibility: presenter slice

[github-actions]

Milestone

Security, privacy, accessibility

What shipped

• Added a narrow Section 13 presenter increment for DLS-SAFE-003, DLS-SAFE-007, DLS-SAFE-008, and DLS-SAFE-010.
• Updated pages/dashboard/src/presenter.js so external links render with preserved non-empty accessible labels and conservative target="_blank" plus rel="noopener noreferrer" attributes.
• Kept untrusted finding summaries rendered as inert text nodes rather than markup.
• Added unit coverage in pages/dashboard/test/unit/presenter.test.js and browser coverage in pages/dashboard/test/e2e/smoke.spec.js for skip navigation presence, accessible names, labeled table columns, textual data-state labels, inert HTML-like text rendering, and labeled external links.
• Updated pages/dashboard/PLAN.md with the completed slice and next milestone step.

Specification coverage

• Section 13
• DLS-SAFE-003
• DLS-SAFE-007
• DLS-SAFE-008
• DLS-SAFE-010

Gates

• npm install ✅
• npm run typecheck ✅
• npm run lint ✅
• npm test ✅
• npm run test:e2e ✅

Blockers

• None in this increment.

Next milestone

• Security, privacy, accessibility — next slice for keyboard behavior and additional redaction/privacy semantics.

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