fix(ui): use defined status and interaction color tokens

[BillLeoutsakosvl346]

Several product status indicators referenced undefined CSS variables, leaving attention dots and progress fills transparent and warning/action text without its intended color.

Use the existing --brand-blue for progress and attention, --warning for the legacy-snapshot warning, and --selection for the download action and Cursor keyboard focus ring. Apply the unviewed-download color to its icon instead of overriding the Button. Layout, dimensions, and interactions remain unchanged.

Validation: all eight stale references removed by a tracked-source search; the external conformance audit removes all seven associated consumer findings with no new findings. Existing EMCN and browser-download tests, workspace type/lint checks, import resolution, and mandatory API validation pass. A browser fixture compiled from the real application CSS verifies both themes, matching dimensions, and keyboard focus colors; full live product flows were not exercised. Audit tools and visual-review files are kept outside this PR.

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Sep 19, 2026 5:57pm UTC

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge; no actionable regression or repository-rule violation was identified.

Summary

This PR replaces stale, undefined color-variable references with defined semantic tokens while preserving layout and interaction behavior.

• Uses --brand-blue for progress, completion, and attention indicators.
• Uses --warning for the missing-snapshot warning.
• Uses --selection for interactive action text and keyboard focus.
• Limits the unviewed-download color to the Download icon rather than the surrounding Button.

_{Reviews (1) · Last reviewed commit: "fix(ui): use defined status and interact..."}