Add Search input to create pull remote site flow with controlled scroll

[sejas]

Related issues

• Fixes STU-1013

Proposed Changes

• Add search input and controlled scroll to create and pull remote site flow

Testing Instructions

• Enable the beta feature "Site creation from existing remote site"
• Click on Add site
• Click on Import existing remote site
• Observe that a search bar exists and works as expected
• Observe the scroll of sites works as expected

search-scroll-pull-remote-site-creation-flow.mp4

Pre-merge Checklist

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

[github-actions]

📊 Performance Test Results

Comparing a5f0d89 vs trunk

site-editor

Metric	trunk	a5f0d89	Diff	Change
load	13857.00 ms	11388.00 ms	-2469.00 ms	🟢 -17.8%

site-startup

Metric	trunk	a5f0d89	Diff	Change
siteCreation	21156.00 ms	18106.00 ms	-3050.00 ms	🟢 -14.4%
siteStartup	7986.00 ms	7984.00 ms	-2.00 ms	🟢 -0.0%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change

[epeicher]

Thanks @sejas for adding this improvement! I have tested it, and it works as expected, the search and scroll works fine. LGTM!

List of sites	Search