Studio: The Preview button for blueprints is not visible in agentic UI

[katinthehatsite]

Related issues

Fixes STU-1851

How AI was used in this PR

It was used to adjust the styling

Proposed Changes

This PR ensures that the Preview button for the blueprints in the blueprints galler in the agentic UI is visible.

Dark mode

Light mode

Before the changes

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
• Click on the New site -> Start from a blueprint option
• Scroll to the blueprints and confirm that the preview button is visible in both dark and light modes

Pre-merge Checklist

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

[wpmobilebot]

📊 Performance Test Results

Comparing 444de47 vs trunk

app-size

Metric	trunk	444de47	Diff	Change
App Size (Mac)	1419.29 MB	1419.26 MB	0.03 MB	⚪ 0.0%

site-editor

Metric	trunk	444de47	Diff	Change
load	1053 ms	748 ms	305 ms	🟢 -29.0%

site-startup

Metric	trunk	444de47	Diff	Change
siteCreation	6542 ms	6527 ms	15 ms	⚪ 0.0%
siteStartup	2390 ms	2394 ms	+4 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

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

[wojtekn]

The "Preview" button is now visible well for both light and dark mode.