fix(chat): run block execution state loader

[icecrasher321]

Summary

Fix cross-turn chat run-from-block by preserving pointer-backed execution state during latest snapshot lookup.

Type of Change

• Bug fix

Testing

Tested manually

Checklist

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

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Jul 18, 2026 8:15pm

[cursor]

PR Summary

^{Cursor Bugbot is generating a summary for commit 8128b9b. Configure here.}

[greptile-apps]

Greptile Summary

This PR fixes loading pointer-backed execution state for cross-turn chat runs. The main changes are:

• Omits nullish inline state before snapshot materialization.
• Preserves trace-store references during latest-state lookup.
• Tests fallback from an unavailable latest snapshot to an older valid snapshot.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
apps/sim/lib/workflows/executor/execution-state.ts	Conditionally omits nullish snapshot fields so pointer-backed execution state can be materialized without being overwritten.
apps/sim/lib/workflows/executor/execution-state.test.ts	Updates coverage for pointer-backed lookup and fallback to an older materializable execution.

_{Reviews (1): Last reviewed commit: "fix(chat): run block execution state loa..." | Re-trigger Greptile}