Name repeated landmarks and fix heading levels in patterns - #148

Description

Part of #44, fixes #48.

Repeated landmarks now have unique names, and headings no longer skip a level or add a second h1 to the page. #48's template fixes still hold. This covers what they didn't reach: the archive sidebar template, the hero headers and a few patterns, old and new.

• The Search block has no ariaLabel support, so functions.php turns on core's for it. The search forms are named "Site", "Menu" (overlay) and "Posts" (CTA Search), and the overlay navigations "Expanded". functions.php also declares navigation-widgets support, which the landmark guideline checks for.
• Text Statement is now a paragraph, like Text Statement Wide, since it's a styled statement rather than a heading.
• The default footers still have no heading, like the default themes' footers. The guideline asks for one unless the footer is a named landmark, so I'd like a second opinion on whether a one-line footer needs it.

Screenshots

No visual changes, except one: in After Hours, Text Statement now uses the body font instead of the condensed heading font, so it wraps one line longer.

Testing Instructions

1. Import the accessibility test content and check the home page, a post, a page, an archive, search results and the 404 with a landmarks tool and HeadingsMap. Each has one banner, main and contentinfo, a single h1 and no skipped levels, and the search form is named "Site".
2. In the Site Editor, swap the header for Hero Colophon or Hero Epigraph. The page still has a single h1, and the header navigation is "Primary".
3. Swap the navigation overlay for Overlay Contents and open the menu on a small screen. Its navigation is "Expanded" and its search is "Menu".
4. Add CTA Search, Archive Simple, Archive Photographic, Format Audio and Text Alternating to a page. Headings go from h1 to h2 without skipping, and the CTA's search is "Posts".
5. Repeat a few steps in another color variation, and open the changed templates and patterns in the Site Editor. There are no block recovery warnings.

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 5.5
Used for: Auditing the theme against the landmark and heading guidelines, making the changes and testing them. I reviewed and adjusted the result.

🤖 Generated with Claude Code