improvement(chat): reuse shared overflow fades on scroll edges

[waleedlatif1]

Summary

• Add conditional top and bottom fades to the shared workspace, organization, and Copilot chat transcript.
• Reuse the OverflowText fade width for chat and standalone search results, keeping the composer controls outside the mask.

Type of Change

• Improvement

Testing

• Cleanup review: no findings.
• App type-check and 14 existing tests across five nearby chat suites passed.
• Lint, block registry audit, full audit suite, and docs manifest verification passed.
• Regenerated committed artifacts; no generated changes.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 28, 2026 9:21pm UTC

[cubic-dev-ai]

No issues found across 2 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

[Medium risk] Adds visual scroll-edge fades to two chat and search UI components.

The PR appears safe to merge; no actionable issue was identified.

Summary

The PR applies shared conditional scroll-edge fades to chat transcripts and aligns standalone search results with the shared fade width.

• Chat observes the virtualized transcript and fades only edges with hidden content.
• Search results use the shared 16px fade band.

_{Reviews (1) · Last reviewed commit: "improvement(chat): reuse shared overflow..."}