Stats: Add Referrers module to Realtime tab

[a8ck3n]

Follows: #99940

Proposed Changes

Adds the Referrers module to the Realtime tab.

Note: Children of the Search Engines entry are not processed at the moment so the full values are shown. This complicates the data a bit so I think we can iterate on this point in a follow-up.

Why are these changes being made?

To match designs per internal P2 post.

Testing Instructions

• Visit the Traffic → Realtime tab.
• Confirm the Referrers module is displayed with an initial loading state.
• Confirm the views update as new data comes in.

If you see large numbers appear suddenly in the main Views column, please report it!

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 UI changes, have we tested the change in various languages (for example, ES, PT, FR, or DE)? The length of text and words vary significantly between languages.
• 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-133853

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-133853&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-133853&env=a8c-for-agencies

[matticbot]

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

Sections (~6 bytes added 📈 [gzipped])

name   parsed_size           gzip_size
stats       +229 B  (+0.0%)       +6 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 (~18 bytes added 📈 [gzipped])

name                                              parsed_size           gzip_size
async-load-calypso-my-sites-stats-pages-realtime       +172 B  (+1.5%)      +18 B  (+0.5%)

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.

[matticbot]

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

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

• notifications
• odyssey-stats
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug update/stats-real-time-referrers on your sandbox.

[kangzj]

Looks good to ship and iterate 👍

[kangzj]

Maybe we could just remove all the children in Search Engine item and ship?

[a8ck3n]

Maybe we could just remove all the children in Search Engine item and ship?

Ha, ha. I was actually thinking the same thing, at least initially. I'll add that with a TODO and we can think on how best to handle it before spending too much time on it.