Help Center + Big Sky Integration Updates

[emdashcodes]

This PR includes two changes for the Help Center + Big Sky & CIAB integration:

1. Fix: Add optional chaining for next-admin store access

When helpCenterData.isNextAdmin is true but the next-admin store hasn't been registered yet (i.e. still loading), calling select('next-admin').getMetaMenuItems() throws a TypeError because select('next-admin') returns undefined. This was causing crashes for me. The check reruns when the store changes so it still works and loads the help center after CIAB loads in.

2. Support navigation continuation hook

Adds support for a useNavigationContinuation hook that can be provided by external plugins (Big Sky). This enables conversation continuation after page navigation when using the wp-admin/navigate ability specifically.

This pattern was already in use for wp-admin navigation. It is needed because the page does a full page reload, and we need to follow-up with the model after the app has re-rendered.

Testing Steps

Loading

1. Load CIAB without the unified-agent feature flag (i.e. /wp-admin/admin.php?page=next-admin&p=%2F)
2. Verify the Help Center loads without console errors
3. Verify the agent chat panel appears and functions correctly
4. (Optional) Load with flags=unified-agent and see the unified agent correctly loads instead

Navigation

1. Load CIAB without the unified-agent feature flag (i.e. /wp-admin/admin.php?page=next-admin&p=%2F)
2. Verify the Help Center loads without console errors
3. Verify the agent chat panel appears and functions correctly
4. Load with ?flags=unified-agent to test the unified agent
5. Ask the agent to navigate to a wp-admin page (e.g., "take me to the posts page")
6. Verify the page navigates and the conversation resumes with the agent acknowledging the navigation

[github-actions]

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[matticbot]

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

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

• help-center
• notifications
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug fix/help-center-next-admin-optional-chaining on your sandbox.

[matticbot]

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

Async-loaded Components (~213 bytes added 📈 [gzipped])

name                               parsed_size           gzip_size
async-load-help-center-app              +710 B  (+0.0%)     +213 B  (+0.0%)
async-load-automattic-help-center       +710 B  (+0.0%)     +213 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.