[fix/feat:ui] Capitalize Work Log heading

[sandersonstabo]

What changed

The mixed activity group label now renders as Work Log instead of work log.

Why

This label is a section heading, so it should match the capitalization used by the rest of the activity UI.

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 test apps/web/src/components/chat/MessagesTimeline.test.tsx; vp check; vp run typecheck passed locally before splitting these PRs.

Note

Capitalize 'Work Log' heading in work group sections

Updates the default group label in the WorkGroupSection component from 'work log' to 'Work Log'. The corresponding test in MessagesTimeline.test.tsx is updated to match.

^{Macroscope summarized 651f474.}

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Note

Low Risk
Copy-only UI tweak with a matching test update; no behavior or data paths change.

Overview
Capitalizes the mixed-activity work group heading from work log to Work Log in WorkGroupSection (MessagesTimeline.tsx), so it reads like the other activity section titles. Tool-only groups still use 1 tool call / N tool calls and are unchanged.

The MessagesTimeline test that asserts context compaction appears in that group now expects Work Log in the markup.

^{Reviewed by Cursor Bugbot for commit 651f474. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[macroscopeapp]

Approvability

Verdict: Approved

Simple copy change that capitalizes a UI heading from "work log" to "Work Log" with a matching test update. No logic or runtime behavior changes.

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