Integrate zoom transitions in Reader

[kean]

after-zoom-reader.mp4

The previous transitions used an awkward gray selected style, which is now gone.

before-zoom-reader.mp4

Regression Notes

1. Potential unintended areas of impact

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

3. What automated tests I added (or what prevented me from doing so)

PR submission checklist:

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

Testing checklist:

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

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	Configuration	Release-Alpha
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📲 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	pr23947-7584f56
	Version	25.6
	Bundle ID	org.wordpress.alpha
	Commit	7584f56
	App Center Build	WPiOS - One-Offs #11278

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[crazytonyli]

IMHO, push transition works better in the context of a list and details screen. The "<" back button also indicates a pop transition. An "x" dismiss button might be more suitable for a zoom-out transition.

[kean]

Apple uses this transition in iOS 18 pretty often for "push" navigations with a back button. I think I agree that it still feels a little bit off here. I think I mainly prefer the new transition because it allows you to dismiss a post quickly with a swipe. With a traditional push, you have to tap "back" on iPad.