Fix Help Center in /start when the user signs up without redirects

[alshakero]

Proposed Changes

When the user signs up without hard-redirects, the client/controller doesn't have the ability to switch to the logged in layout because it is still outside React reactive cycle. What Calypso does in this case is it keeps rendering LayoutLoggedOut even after the user logs in.

• This adds the Help Center to the LayoutLoggedOut
• To reloads the proxy on auth to hydrate tokens and what not
• It fetches the user to update the Redux store with the new auth data.

Why are these changes being made?

• DIFM flow needs the Help Center to be available for users right after log in.

Testing Instructions

• Make this hook return true
• Go to /start/do-it-for-me/new-or-existing-site?flags=signup%2Fhelp-center-link, logged out
• Signup with email
• Try to click on "Questions? Contact our..."
• The Help Center should open and a chat should start successfully.

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-138382

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-138382&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-138382&env=a8c-for-agencies

[alshakero]

This is moved verbatim from LayoutLoggedIn.

[matticbot]

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

App Entrypoints (~240 bytes added 📈 [gzipped])

Details

name         parsed_size           gzip_size
entry-main        +980 B  (+0.0%)     +240 B  (+0.0%)
entry-login       +980 B  (+0.0%)     +240 B  (+0.0%)

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

Sections (~46 bytes added 📈 [gzipped])

Details

name    parsed_size           gzip_size
signup       +158 B  (+0.1%)      +46 B  (+0.1%)

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.

[matticbot]

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

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

• help-center

To test WordPress.com changes, run install-plugin.sh $pluginSlug fix/help-center-in-difm on your sandbox.

[escapemanuele]

Tested and this solves the problem!

[arthur791004]

We've reverted this change because of p1742968249042509-slack-C02FMH4G8.