fix(chat): sweep the text shimmer left-to-right

[TheodoreSpeaks]

Summary

• Drop the reverse from the shimmer-sweep animation in shimmer-text.module.css — the sweep runs right-to-left on staging
• fix(chat): reverse shimmer sweep to left-to-right #5650 added reverse to flip the old keyframes (implicit 0% -> 200%, natively right-to-left) into a left-to-right sweep
• feat(agent-stream): thinking and tool streaming #5671 then rewrote the keyframes to 100% -> -100%, which is already left-to-right, but left reverse in place — the two cancel out
• Direction now lives in one place (the keyframes) instead of being split across the shorthand and the @keyframes block 10 lines apart
• Affects every ShimmerText consumer: subagent labels and tool-call rows in chat, plus the agent-stream thinking chrome

Type of Change

• Bug fix

Testing

Tested manually. bun run lint:check and bun run check:api-validation:strict 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)

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Jul 24, 2026 5:38pm

[cursor]

PR Summary

Low Risk
Single-line visual animation tweak in shared UI CSS with no logic, auth, or data impact.

Overview
Fixes the in-progress text shimmer so the highlight sweeps left-to-right again across all ShimmerText usages (chat subagent labels, tool-call rows, thinking chrome).

The shimmer-sweep animation no longer uses reverse. After an earlier keyframe rewrite (100% → -100%), the sweep was already defined as left-to-right, but reverse was still applied and effectively flipped it back to right-to-left on staging. Direction is now controlled only by the @keyframes block.

^{Reviewed by Cursor Bugbot for commit 16879cc. Bugbot is set up for automated code reviews on this repo. Configure here.}

[greptile-apps]

Greptile Summary

Fixes the shimmer animation direction by removing the stale reverse modifier, allowing the existing keyframes to sweep text left-to-right.

Confidence Score: 5/5

The PR appears safe to merge with no actionable issues identified.

The changed shorthand now plays the existing left-to-right keyframes normally, while reduced-motion behavior and all consumers remain unaffected.

Important Files Changed

Filename	Overview
apps/sim/components/ui/shimmer-text.module.css	Removes the animation reversal so the 100% to -100% keyframe progression renders in its intended left-to-right direction.

_{Reviews (1): Last reviewed commit: "fix(chat): sweep the text shimmer left-t..." | Re-trigger Greptile}

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