T18442: Reevaluate site title font when button state changes

[christianbilodeau]

Evaluate which font to display every time the titleTextAttributesTransformer is executed. This way, if the font scale is changed in accessibility settings, the site title font will be updated with the right size upon reentering the app.

Fixes #18442

Before:

After:

Regression Notes

1. Potential unintended areas of impact

   • Appearance on iPhone & iPad
   • Appearance in portrait or landscape

2. What I did to test those areas of impact (or what existing automated tests I relied on)

• Tested on iPad, problem was not present in the sidebar (even before my changes):

• Tested in landscape, looks good:

3. What automated tests I added (or what prevented me from doing so) Didn't find similar tests in codebase + impractical to test dynamic text size

PR submission checklist:

• [x] I have completed the Regression Notes.
• [x] I have considered adding unit tests for my changes.
• [x] I have considered adding accessibility improvements for my changes.
• [x] I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing checklist:

• [x] WordPress.com sites and self-hosted Jetpack sites.
• [x] Portrait and landscape orientations.
• [x] Light and dark modes.
• [x] Fonts: Larger, smaller and bold text.
• [x] High contrast.
• [x] VoiceOver.
• [x] Languages with large words or with letters/accents not frequently used in English.
• [x] Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• [x] iPhone and iPad.
• [x] Multi-tasking: Split view and Slide over. (iPad)

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr23640-d7c3f48
	Version	25.4
	Bundle ID	org.wordpress.alpha
	Commit	d7c3f48343ccc3f9bb549625ccf6ef1a983540bc
	App Center Build	WPiOS - One-Offs #10767

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr23640-d7c3f48
	Version	25.4
	Bundle ID	com.jetpack.alpha
	Commit	d7c3f48343ccc3f9bb549625ccf6ef1a983540bc
	App Center Build	jetpack-installable-builds #9809

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.