Display the same blog in expanded and collapsed mode

[crazytonyli]

Description

The "root split view" on iPad has two completely separated view controller stacks for expanded and collapsed mode. They can display two different blogs when switching between them. Before iOS 26, the switch could only happen when the app was side-by-side with other apps, but iOS 26's resizing window feature makes it super easy to make the app switch between expanded and collapsed modes.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[wpmobilebot]

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

	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	28710
	Version	PR #24787
	Bundle ID	org.wordpress.alpha
	Commit	d9cc98b
	Installation URL	08se5361hrm4o

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

[wpmobilebot]

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

	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	28710
	Version	PR #24787
	Bundle ID	com.jetpack.alpha
	Commit	d9cc98b
	Installation URL	5nbic6969nta8

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

[kean]

It worked, and I confimed that these methods are only called when something actually changes: splitViewControllerDidExpand, splitViewControllerDidCollapse. I was concerned whether they get called on the first appearance or something.