fix(workflow): preserve canvas and deploy modal behavior

[waleedlatif1]

Summary

• preserve the temporary connection edge while dragging the new-block picker
• keep deploy output selection interactive inside the modal and prevent horizontal body overflow
• cover the shared combobox and modal behavior with regression tests

Type of Change

• Bug fix

Testing

• Tested canvas picker dragging, deploy output selection, and modal overflow manually
• bun run lint, bun run check:audits, focused Vitest suites, and affected package typechecks pass

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]

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Sep 2, 2026 7:45am UTC

[greptile-apps]

Greptile Summary

This PR preserves the temporary connection picker while it is dragged and keeps deploy-output selection interactive within its modal.

• Separates transient selector-node changes from persisted workflow-node processing and initializes the selector with explicit dimensions.
• Adds optional inline rendering for shared combobox dropdowns and enables it for deploy output selection.
• Prevents incidental horizontal overflow in modal bodies.
• Adds regression coverage for prop forwarding, inline dropdown placement, and modal overflow classes.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete correctness or security failures identified in the changed paths.

The transient canvas node is handled before the new early return, existing combobox callers retain portalled rendering by default, and the deploy modal explicitly opts into the intended inline behavior.

Important Files Changed

Filename	Overview
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx	Correctly handles transient connection-picker position changes before bypassing persisted workflow-node reconciliation and uses matching initial dimensions.
packages/emcn/src/components/combobox/combobox.tsx	Adds an opt-in portal override while preserving the existing portalled behavior by default.
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/chat/components/output-select/output-select.tsx	Threads the optional portal behavior through both output-select trigger variants without changing existing callers.
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/chat/chat.tsx	Enables inline output dropdown rendering specifically within the deploy modal.
packages/emcn/src/components/chip-modal/chip-modal.tsx	Suppresses horizontal body overflow while retaining vertical scrolling.

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[cubic-dev-ai]

No issues found across 8 files

Confidence score: 5/5

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

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