[laurelthorburn]

Old /apis/<name> links (and a couple of other stale URLs) render as 404s on
shopify.dev's checkout UI extensions reference. This repoints them to the current
/target-apis/... URLs. Link targets only, no prose or type changes.

Target branch: unstable (this PR only) Links fixed: 50 Files: ui-extensions-react/src/surfaces/checkout/hooks/api.ts, ui-extensions-react/src/surfaces/customer-account/hooks/api.ts, ui-extensions-react/src/surfaces/point-of-sale/hooks/api.ts, ui-extensions/docs/surfaces/checkout/staticPages/configuration.doc.ts, ui-extensions/src/surfaces/checkout/api/address-autocomplete/standard.ts, ui-extensions/src/surfaces/checkout/api/checkout/checkout.ts, ui-extensions/src/surfaces/checkout/api/standard/standard.ts, ui-extensions/src/surfaces/checkout/components/shared.ts, ui-extensions/src/surfaces/customer-account/api/order-status/order-status.ts
Sibling PRs for the other versions: #4797 (2026-10), #4798 (2027-01-rc), #4799 (2026-07), #4800 (2026-04), #4801 (2026-01), #4802 (2025-10), #4803 (2025-07), #4804 (2026-10-rc)
Unresolved: apis/cartlinedetailsapi (2), apis/checkoutapi#properties-propertydetail-applymetafieldchange (1), apis/standardapi#example-settings (2), apis/standardapi#properties-propertydetail-applydiscountcodechange (1), apis/standardapi#properties-propertydetail-appmetafields (1), apis/standardapi#properties-propertydetail-availablepaymentoptions (1), apis/standardapi#properties-propertydetail-buyerjourney (2), apis/standardapi#properties-propertydetail-extension (2), apis/standardapi#properties-propertydetail-i18n (1), apis/standardapi#properties-propertydetail-localization (1). There is no matching page or anchor on shopify.dev: standardapi and checkoutapi redirect to a 404 target page, and the customer-account cartlinedetailsapi is for an order-status target, so the checkout order-summary page is wrong for it. I left these unchanged.

Anchors are rewritten to the new #docsstandard<api>api-propertydetail-<prop> ids, and #examples becomes #use-cases. This branch has no {API_VERSION} placeholder, so links stay versionless (they resolve to /latest/). I checked each new URL on shopify.dev: every page loads, and every fragment exists as an element id on that version's page.

No generated docs are tracked on this branch, and build-docs.sh does not build unstable.

Context: shopify.dev link audit for the checkout and customer account UI extensions
references. The shop/world side (MDX links and redirects) is handled in a separate
shopify-dev PR.

🤖 Generated with Claude Code

[github-actions]

We detected some changes in packages/*/package.json or packages/*/src, and there are no updates in the .changeset directory. If the changes are user-facing and should cause a version bump, run yarn changeset to track your changes and include them in the next release CHANGELOG. If you are making simple updates to repo configuration, examples, or documentation, you do not need to add a changeset.

[github-actions]

📝 POS Version Documentation Reminder

We detected changes in packages/*/src/surfaces/point-of-sale, but there are no updates to the POS versions documentation.

If these changes are user-facing and should be documented in the version changelog, please update:
packages/ui-extensions/docs/surfaces/point-of-sale/staticPages/pages/versions.doc.ts

If you are making internal changes that don't affect the public API, you can ignore this reminder.