Generated pattern headers use the template slug as title and category names instead of slugs #871

What happens

The pattern headers CBT writes use the wrong values for the title and categories.

Title. Patterns created from templates use the template slug as the title:

https://github.com/WordPress/create-block-theme/blob/5524f195e8/includes/create-theme/theme-patterns.php#L59-L78

 * Title: {$template_slug}

So a theme gets patterns titled "archive-product", "order-confirmation", "home-header" and so on. The title becomes the block name in List View and is sent to translators.

Categories. Patterns saved from the editor get the category display names instead of slugs:

https://github.com/WordPress/create-block-theme/blob/5524f195e8/includes/create-theme/theme-patterns.php#L86-L87

wp_list_pluck( $pattern_category_list, 'name' )

So headers read Categories: Text, Categories: About or Categories: Banners. Core matches category slugs, so these patterns don't appear under the core Text, About or Banners categories (the core slug for the last one is banner).

Expected

• Template-based patterns use the template's title ($template->title), e.g. "Product Catalog".
• Categories use the term slugs.

Related

#562 (saving turns templates into patterns).

Drafted with AI assistance, verified by me against a theme exported with Create Block Theme and the source.