Agentic UI: Fix the preview landing on the home page when opening a URL on a stopped site

[bcotrim]

Related issues

• N/A

How AI was used in this PR

Claude Code traced the race and wrote the fix and tests. I found the bug by hand and verified the fix in the app.

Proposed Changes

Opening a URL in the preview on a stopped site landed on the site's home page instead of the requested page — you had to click a second time. The site was started first and the preview pointed at the destination after, so the preview mounted on the previous path while the start was still in flight, and the load it reported back overwrote the destination. It's now pointed at the destination before the site starts.

Testing Instructions

Agentic UI, with a stopped site.

1. From the site's Overview tab, click a WordPress link (e.g. wp-admin).
2. The site starts and the preview lands on that page. Before this PR it landed on the home page and needed a second click.
3. Repeat with the site already running — unchanged.

Pre-merge Checklist

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

🤖 Generated with Claude Code

[wpmobilebot]

📊 Performance Test Results

Comparing 5df38f9 vs trunk

app-size

Metric	trunk	5df38f9	Diff	Change
App Size (Mac)	1375.36 MB	1375.36 MB	+0.00 MB	⚪ 0.0%

site-editor

Metric	trunk	5df38f9	Diff	Change
load	1045 ms	1084 ms	+39 ms	⚪ 0.0%

site-startup

Metric	trunk	5df38f9	Diff	Change
siteCreation	6535 ms	6499 ms	36 ms	⚪ 0.0%
siteStartup	2386 ms	2383 ms	3 ms	⚪ 0.0%

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Results are median values from multiple test runs.

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

[nightnei]

Great catch, I confirm that I reproduced the issue in trunk and it's fixed here 👍