A4A: Show referral order confirmation message.

[jkguidaven]

Closes https://github.com/Automattic/jetpack-genesis/issues/343

Proposed Changes

• Add Official A4A banner layout component. This is necessary to ensure consistent spacing. We will need to update any existing notifications to use the official banner layout on a separate PR.
• Add a new hook to simplify URL query param usage that ties with UI state. This is a recurring pattern, and we need to simplify this implementation for later usage.
• Implement the NewReferralOrderNotification component using the A4A banner layout, which will be rendered when the referral email URL query parameter is present.
• Update the Checkout flow for the Referral purchases to redirect user with Referral email in the URL parameter.

Testing Instructions

• Use the A4A live link and go to /marketplace/products

• Enable 'Referral` mode.

• Add a few items to the cart, then proceed to checkout.
  

• On the checkout page, input a referral email and request payment.
  

• Confirm that you are redirected to the Referrals dashboard with the Order confirmation.
  

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-110724

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-110724&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-110724&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

App Entrypoints (~17 bytes added 📈 [gzipped])

name           parsed_size           gzip_size
entry-stepper        +61 B  (+0.0%)      +17 B  (+0.0%)
entry-main           +61 B  (+0.0%)      +17 B  (+0.0%)

Common code that is always downloaded and parsed every time the app is loaded, no matter which route is used.

Sections (~366 bytes added 📈 [gzipped])

name                          parsed_size           gzip_size
a8c-for-agencies-referrals       +33096 B  (+7.3%)   +10650 B  (+7.5%)
a8c-for-agencies-marketplace       +374 B  (+0.1%)     +145 B  (+0.1%)
a8c-for-agencies-sites              +34 B  (+0.0%)      +25 B  (+0.0%)
a8c-for-agencies-overview           +32 B  (+0.0%)      +18 B  (+0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[andrii-lysenko]

Looks great 👍

[a8ci18n]

This Pull Request is now available for translation here: https://translate.wordpress.com/deliverables/14522650

Some locales (Hebrew, Japanese) have been temporarily machine-translated due to translator availability. All other translations are usually ready within a few days. Untranslated and machine-translated strings will be sent for translation next Monday and are expected to be completed by the following Friday.

Thank you @jkguidaven for including a screenshot in the description! This is really helpful for our translators.

[a8ci18n]

Translation for this Pull Request has now been finished.