fix(canvas): raw tooltip shows up when hovering block params

[waleedlatif1]

Summary

• Hovering a truncated block param value (or a long block name) on the canvas popped the browser's raw native tooltip, dumping the full untruncated content (including raw code) over the graph
• Root cause: sub-block-row-view.tsx and workflow-block-view.tsx used a native title attribute on truncated spans instead of the styled cursor-following Tooltip
• Added a small shared OverflowSpan component (built on the existing @sim/emcn floating-tooltip primitives) that shows the styled tooltip only when the text is actually clipped, and swapped both call sites to use it

Type of Change

• Bug fix

Testing

• bun run type-check and bun run lint:check pass for the workflow-renderer package
• bun run check:api-validation and the monorepo boundary check pass
• Verified with a jsdom render test: no native title attribute is emitted, and the styled floating tooltip renders the full value only on hover when the text overflows

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)

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	Jul 11, 2026 4:59am

[cursor]

PR Summary

Low Risk
Presentation-only change in workflow-renderer canvas views; no auth, data, or execution logic touched.

Overview
Fixes canvas hover showing the browser’s native title tooltip on truncated block names and param rows, which could dump long raw code/JSON over the graph.

Introduces shared OverflowSpan, built on @sim/emcn’s useFloatingTooltip and isTextClipped, so a styled floating tooltip appears only when text is actually clipped. SubBlockRowView (labels and values) and WorkflowBlockView (block name) now use OverflowSpan instead of title on truncated spans.

^{Reviewed by Cursor Bugbot for commit 6e06e6c. Configure here.}

[greptile-apps]

Greptile Summary

This PR replaces raw browser tooltips on workflow canvas text with styled overflow-only tooltips. The main changes are:

• Added a shared OverflowSpan component for clipped text.
• Swapped block parameter titles and values to use the styled tooltip.
• Swapped workflow block names to use the styled tooltip.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
packages/workflow-renderer/src/lib/overflow-span.tsx	Adds the shared clipped-text span and floating tooltip wrapper.
packages/workflow-renderer/src/workflow-block/sub-block-row-view.tsx	Uses the new overflow span for sub-block row labels and displayed values.
packages/workflow-renderer/src/workflow-block/workflow-block-view.tsx	Uses the new overflow span for workflow block names.

_{Reviews (2): Last reviewed commit: "fix(canvas): drop unused ResizeObserver ..." | Re-trigger Greptile}

[waleedlatif1]

@greptile

[waleedlatif1]

@cursor review

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

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^{Reviewed by Cursor Bugbot for commit 6e06e6c. Configure here.}