Detect skipped checkout in launchpad selected plan

[heavyweight]

Whenever a user skips purchasing the plan he selected we should customize the launchpad experience.

1. The Choose a plan (plan_selected) task should be marked an uncompleted
2. The header should change from "Let's get ready to launch" to "Get started with WordPress.com"

Fixes #92243

Proposed Changes

• Redirect with param when closing checkout
• Apply the launchpad customizations based on this

Testing Instructions

• Follow the onboarding flow /start
• Select a paid plan
• Click the close checkout button
• Ensure that skippedCheckout is added to the URL
• Don't select goals so that we default with the build intent
• Select a design
• Ensure that the customizations for the title and selected plan are applied to the launchpad

Testing flows from stepper

• Follow the /start/newsletter flow
• Select a paid plan
• Click the close checkout button
• Ensure that skippedCheckout is added to the URL
• Ensure that the selected plan task is marked as incomplete

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-113008

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-113008&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-113008&env=a8c-for-agencies

[matticbot]

This PR modifies the release build for the following Calypso Apps:

For info about this notification, see here: PCYsg-OT6-p2

• notifications
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug fix/skipped-checkout-selected-plan on your sandbox.

[matticbot]

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

Sections (~158 bytes added 📈 [gzipped])

name                  parsed_size           gzip_size
link-in-bio-tld-flow       +300 B  (+0.0%)      +77 B  (+0.0%)
write-flow                 +271 B  (+0.0%)      +68 B  (+0.0%)
videopress-flow            +271 B  (+0.0%)      +68 B  (+0.0%)
build-flow                 +271 B  (+0.0%)      +68 B  (+0.0%)
checkout                   +127 B  (+0.0%)      +33 B  (+0.0%)
site-setup-wg               +74 B  (+0.1%)      +23 B  (+0.2%)
site-setup-flow             +74 B  (+0.1%)      +23 B  (+0.2%)
update-design-flow          +29 B  (+0.0%)       +9 B  (+0.0%)
signup                      +29 B  (+0.0%)       +9 B  (+0.0%)
newsletter-flow             +20 B  (+0.1%)       +2 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.

Async-loaded Components (~73 bytes added 📈 [gzipped])

name                                              parsed_size           gzip_size
async-load-calypso-my-sites-checkout-modal             +127 B  (+0.0%)      +33 B  (+0.0%)
async-load-calypso-layout-masterbar-checkout-tsx       +127 B  (+0.1%)      +40 B  (+0.1%)
async-load-calypso-layout-masterbar-checkout           +127 B  (+0.2%)      +40 B  (+0.2%)
async-load-calypso-blocks-editor-checkout-modal        +127 B  (+0.0%)      +33 B  (+0.0%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

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.