task: #3613821 Show the Horizon Aid home page as the site template screenshot in the installer

Issue: #3613821 Show the Horizon Aid home page as the site template screenshot in the installer

What this changes

screenshot.webp was the Horizon Aid logo on a light background. In the browser installer's "Choose a site template" step, that card sat next to Varbase Starter's artwork and told a site builder nothing about what the template builds.

It is now a preview of the home page the template actually installs — header, hero image and the Focus Forward panel — at the same 632×304 the other site template cards use. 29 KB.

How this was verified

• Captured from a real install of this recipe, not a mock-up.
• Required the recipe on a clean Varbase project, opened /core/install.php, and confirmed the card renders at 632x304 with Horizon Aid selectable next to Varbase Starter.

User interface changes

• The Horizon Aid card in the site template picker previews the home page.

API changes

None.

Data model changes

None.

Release notes snippet

• The site template picker now previews the Horizon Aid home page instead of showing the logo.

AI-Generated: Yes

Checkpoints

• File an issue about this project
• Addition/Change/Update/Fix to this project
• Testing to ensure no regression
• Automated unit/functional testing coverage
• Developer Documentation support on feature change/addition
• User Guide Documentation support on feature change/addition
• UX/UI designer responsibilities
• Accessibility and Readability
• Reviewed by a human
• Code review by maintainers
• Full testing and approval
• Credit contributors
• Review with the product owner
• Update Release Notes
• Release