Find the page a query names from a title list, not a second search

[enf0rc3]

A section's own page can rank far below the pages inside it: /docs/infrastructure/deployment-targets/ is 36th on raw score for "deployment targets". The overlay rescues it by promoting the page a query names, and claimsName decides that from a URL and a title alone.

Pagefind holds both, but only inside a result's fragment, one fetch each. That is why the promotion needed a second search narrowed to shallow pages by a landing:true filter, and why it only ever reached pages three segments deep.

Both are known from the site's own markdown at build time. /docs/search-titles.json now carries them for every indexed page, built from the same import.meta.glob that llms.txt.ts and sitemap.xml.ts already walk. The lookup needs no fetches and no second search, and any page can be promoted from any depth.

Removed with it: the landing:true filter, its data-pagefind-filter in both layouts, the third api.search per query, and LANDING_CANDIDATES.

Pagefind is used only through its public client API. Nothing here reads its index format.

Measured from the build

• 1258 entries, 112 KB raw, 19 KB gzipped, fetched once alongside the index
• 0 list entries are absent from the pagefind index, so a promoted row always has a page behind it
• The only indexed page with no entry is /docs/ itself, which has no frontmatter title

Notes for review

• The promoted row has no excerpt, because it has no fragment. DocsSearch.astro already collapses an empty excerpt, so the row shows its title and breadcrumb. Carrying a description per page would have roughly tripled the file for one row on a minority of queries.
• namedPage rejects a page whose facet does not match the active tab. The list covers the whole site while a tab narrows results to one section.
• Redirect stubs are excluded. Pagefind drops them for having no article, so promoting one would link somewhere the search cannot reach.
• URLs are normalised to a trailing slash to match what Pagefind returns. The two are compared as strings.

All 30 tests in tests/docs-search.spec.ts pass.

Follows #3428. Replaces the approach in #3408.

🤖 Generated with Claude Code

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