Fix Refresh icon being too large in browser toolbar

[katinthehatsite]

Related issues

Fixes STU-1906

How AI was used in this PR

Not needed

Proposed Changes

This PR reduces the size of the refresh icon in the browser toolbar window.

Before

After

Testing Instructions

• Pull the changes from this branch
• Start Studio with npm start
• Enable the Agentic UI feature flag from Studio -> Feature flags from the topbar
• Start one of the sites in the agentic UI
• Observe the refresh icon that is smaller compared to trunk and is more in line with other icons

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[wpmobilebot]

📊 Performance Test Results

Comparing ffbcea7 vs trunk

app-size

Metric	trunk	ffbcea7	Diff	Change
App Size (Mac)	1350.13 MB	1419.48 MB	+69.35 MB	🔴 5.1%

site-editor

Metric	trunk	ffbcea7	Diff	Change
load	1091 ms	1081 ms	10 ms	⚪ 0.0%

site-startup

Metric	trunk	ffbcea7	Diff	Change
siteCreation	6506 ms	6534 ms	+28 ms	⚪ 0.0%
siteStartup	2391 ms	2396 ms	+5 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)

[epeicher]

Thanks for fixing this @katinthehatsite! I have checked, and it looks good to me!

Before	After

[katinthehatsite]

Thanks for the review @epeicher 🙇