TanStack migration: Commerce Seo sections in SKIP_RESOLVE_TYPES cause generic page titles

Problem

After migrating from Deco Fresh to TanStack Start, PDP and catch-all routes render with generic page titles instead of product-specific SEO metadata.

Root cause: the Commerce Seo block type is listed in SKIP_RESOLVE_TYPES, so the section resolver skips it and returns no data. The page title falls back to a generic default.

Symptoms

• Product pages show a generic site title instead of the product name.
• document.title does not change on SPA navigation to PDP routes.
• og:title and meta description tags are empty or generic.

Fix pattern

Replace the Seo commerce block with a site section that has its own server loader:

1. Create a site section (e.g. SeoSection) that accepts title and description as CMS props.
2. Add a loader to the section that returns { title, description } fetched from the product context.
3. Register the new section in both sections.gen.ts AND section-loaders.ts.
4. Remove the Commerce Seo block from SKIP_RESOLVE_TYPES or ensure it is resolved via the new section.

Without registering in BOTH files, the section either fails to load or its loader never runs.

Reference

See PR #12 in the site repo for a working implementation of this pattern.

Start by tracing Commerce Seo through SKIP_RESOLVE_TYPES and inspect sections.gen.ts and section-loaders.ts. Compare the working pattern in PR #12, then verify that PDP and catch-all routes resolve title and description data and update document.title, og:title, and meta description on SPA navigation.