Add typed JSON output to hydrogen customer-account-push

[gonzaloriestra]

WHY are these changes introduced?

Automation needs the Customer Account URLs that were pushed, without parsing the terminal confirmation.

WHAT is this pull request doing?

Return a typed receipt with the storefront ID, redirect URI, JavaScript origin and logout URI. Add --json and schema help, preserve dev-server cleanup, and forward the documented relative URI flags.

Without --json, the existing terminal presentation remains. Example JSON result:

shopify hydrogen customer-account-push --json

{"storefrontId":"gid://shopify/HydrogenStorefront/1","redirectUri":"https://example.com/account/authorize","javascriptOrigin":"https://example.com","logoutUri":"https://example.com"}

HOW to test your changes?

pnpm --filter @shopify/cli-hydrogen test src/commands/hydrogen/customer-account-push.test.ts

Build and typecheck were checked at each layer. The full stack passed 498 tests (6 skipped), lint, and schema discovery for all 22 finite commands. Command-line smoke checks covered a successful unlink result, fatal project errors, watch-mode rejection and schema environment flags. Live authenticated Shopify operations have not been exercised.

Stack

Draft 3 of 9. Previous: #4096. Next: #4098. One changeset is included in #4103.

1. Prepare Hydrogen commands for typed JSON output
2. Add typed JSON output to Hydrogen build tooling
3. Add typed JSON output to hydrogen customer-account-push
4. Add typed JSON output to hydrogen deploy
5. Add typed JSON output to Hydrogen environment commands
6. Add typed JSON output to Hydrogen route generation
7. Add typed JSON output to Hydrogen project and account commands
8. Add typed JSON output to Hydrogen setup commands
9. Add typed JSON output to Hydrogen maintenance commands

[shopify]

Oxygen deployed a preview of your gonzalo/hydrogen-json-customer-account branch. Details:

Storefront	Status	Preview link	Deployment details	Last update (UTC)
Skeleton (skeleton.hydrogen.shop)	✅ Successful (Logs)	Preview deployment	Inspect deployment	September 29, 2026 2:55 PM

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