Reader: Update author avatar links with user profiles url

[mehmoodak]

Related to https://github.com/Automattic/loop/issues/273

Proposed Changes

The update enables links to author profiles throughout the Reader to direct users to individual user profiles instead of the primary site. This functionality is only accessible if the 'reader/user-profile' feature flag is enabled. As part of this change, the following components have been updated:

• Post Comment
• ReaderAuthorLink
• ReaderAvatar
• PostTrackback also refactored to functional component with TypeScript support.

Why are these changes being made?

Clicking on an author's name now navigates users directly to their user profile, where they can access detailed information about that author.

Testing Instructions

• Go to /read.
• From sidebar navigate to different screens Recent, Discover, Likes, Conversation, Lists, Tags and Post Detail page.
• Verify that every appearance of the author navigates to User Profile page if the flag is enabled.

Note: There are many areas where it seems like we are displaying "author avatars", but in reality, these are actually site logos.

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)?

[matticbot]

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

Sections (~90 bytes added 📈 [gzipped])

name                             parsed_size           gzip_size
write-flow                            +363 B  (+0.0%)      +90 B  (+0.0%)
reader                                +363 B  (+0.0%)      +90 B  (+0.0%)
plugins                               +363 B  (+0.0%)      +90 B  (+0.0%)
link-in-bio-tld-flow                  +363 B  (+0.0%)      +90 B  (+0.0%)
jetpack-cloud-plugin-management       +363 B  (+0.0%)      +90 B  (+0.0%)
home                                  +363 B  (+0.0%)      +90 B  (+0.0%)
build-flow                            +363 B  (+0.0%)      +90 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 (~87 bytes added 📈 [gzipped])

name                                                 parsed_size           gzip_size
async-load-calypso-components-web-preview-component       +363 B  (+0.1%)      +90 B  (+0.1%)
async-load-design-blocks                                  +327 B  (+0.0%)      +87 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.

[matticbot]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-129753

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-129753&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-129753&env=a8c-for-agencies

[mehmoodak]

Added comments for easier review.

[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 loop-273/update-avatar-links on your sandbox.

[DustyReagan]

Works well and everything is behind the flag. 👍

[mehmoodak]

Thanks for approving the PR. Planning to merge this after #98406 (if there is an agreement)