fix(chat): keep empty search activity collapsed

[waleedlatif1]

Summary

• Only expand live workspace search activity when it has source links.
• Remove empty “No results” details while preserving source lists and manual disclosure choices.

Type of Change

• Bug fix

Testing

• Focused activity and citation tests: 4 files, 9 tests passed (tool-activity-group, agent-group, lane-activity, retrieval-citations).
• New empty-search regression failed against the pre-fix code and passed after the fix.
• bun run --cwd apps/sim type-check
• Cleanup review, bun run lint, block-registry audit, all 52 checks in bun run check:audits, and bun run docs-manifest:check.
• Regenerated agent stream docs, docs manifest, and skill links; 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 30, 2026 9:24pm UTC

[greptile-apps]

Confidence Score: 5/5

[Medium risk] Refactors search result display logic in chat activity.

The PR appears safe to merge.

Summary

The PR keeps searches without source links from opening live activity details and removes the empty “No results” detail, while retaining source lists and manual disclosure behavior.

• Adds a regression test for an empty search followed by other tools.

_{Reviews (1) · Last reviewed commit: "fix(chat): keep empty search activity co..."}

[cubic-dev-ai]

No issues found across 4 files

Confidence score: 5/5

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

_{Re-trigger cubic}