[fix/feat:ui] Mute previous tool call row

[sandersonstabo]

What changed

The collapsed previous tool call row now uses muted text.

Why

This row is context for hidden activity, not a tool call result. Muted styling makes that distinction clearer without changing layout.

UI changes

Before:

After:

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

Testing

vp check; vp run typecheck passed locally before splitting these PRs.

Note

Mute tool call toggle button styling in chat messages timeline

Adjusts the styling of the overflow toggle button in the WorkGroupSection component in MessagesTimeline.tsx. The button now uses muted text by default with a hover color change, the icon container no longer enforces muted color, and the 'Show fewer tool calls' label loses its medium font weight and specific foreground color class.

^{Macroscope summarized a94157d.}

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Note

Low Risk
CSS-only tweaks to a single button in the chat timeline; no logic or behavior changes.

Overview
Updates the expand/collapse control in WorkGroupSection (MessagesTimeline.tsx) so the overflow row reads more like secondary context than a tool result.

The button now uses muted text by default (text-muted-foreground/65) with stronger text on hover, instead of inheriting default foreground. The chevron wrapper no longer applies its own muted color (icons still use opacity-70). When expanded, “Show fewer tool calls” drops font-medium and text-foreground/82 so it matches the muted treatment; the collapsed “+N previous tool call(s)” label is unchanged.

^{Reviewed by Cursor Bugbot for commit a94157d. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[macroscopeapp]

Approvability

Verdict: Approved

Pure CSS styling changes that adjust text color and font weight on a UI button element. No runtime behavior changes beyond visual appearance.

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