[johnnie-chen]

Background

The 2025-10 Checkout and Customer Account reference pages show committed merge-conflict markers in the events for EmailField, PasswordField, PhoneField, Select, TextArea, and TextField. For example: Checkout EmailField.

This completes the remaining form-event cleanup following #4333 and the NumberField/MoneyField fixes.

Solution

Resolve the six *ElementEvents declarations using the clean descriptions already present in newer releases. On this branch, resolving the conflicts also removes duplicate blur and change declarations while preserving their callback types. Regenerate Checkout and Customer Account documentation, retaining only the six affected entries in each JSON to avoid unrelated generator changes.

Include a patch changeset for @shopify/ui-extensions so the corrected declarations can ship in the next npm patch. Package publication remains a separate release-maintainer step; the website receives the committed JSON through its docs sync.

No forward-port is needed: the corresponding declarations on 2026-04, 2026-07, and 2026-10-rc are already clean.

🎩

• yarn docs:checkout 2025-10 and yarn docs:customer-account 2025-10 succeeded. Local preview copies were routed to an isolated temporary directory.

• yarn build, yarn type-check, and yarn lint passed. Ignored Preact entry-point wrappers created by the build were removed before lint, matching CI's separate build/lint jobs.

• Verified all six interfaces have unique event members and unchanged event names/callback types; generated descriptions and serialized declarations match the source on both surfaces.

• Verified the built declarations are clean, each JSON changes exactly six entries, and no conflict markers remain under packages/ui-extensions/src or packages/ui-extensions/docs.

• git diff --check and changeset validation passed.

• Existing limitation: node packages/ui-extensions/docs/surfaces/checkout/build-docs-targets-json.test.mjs fails because it expects generated/checkout_extensions/test-version/targets.json, while the generator writes generated/targets.json. Reproduced with the unmodified branch sources and generated docs.

Checklist

• I have 🎩'd these changes (hosted preview pending)
• I have updated relevant documentation