Fix CMM-730: When Reader is shown by default, the initial screen is not visible (#24814)

Author: kean

WordPress/Classes/System/Root View/ReaderPresenter.swift

@@ -27,6 +27,8 @@ public final class ReaderPresenter: NSObject, SplitViewDisplayable {
         self.init(viewModel: ReaderSidebarViewModel())
     }
 
+    weak var splitViewController: UISplitViewController?
+
     init(viewModel: ReaderSidebarViewModel) {
         sidebarViewModel = viewModel
         secondary = UINavigationController()
@@ -221,10 +223,6 @@ public final class ReaderPresenter: NSObject, SplitViewDisplayable {
         }
     }
 
-    private var splitViewController: UISplitViewController? {
-        sidebar.splitViewController
-    }
-
     // MARK: - Deep Links (ReaderNavigationPath)
 
     func navigate(to path: ReaderNavigationPath) {

WordPress/Classes/System/Root View/SplitViewRootPresenter.swift

@@ -103,6 +103,8 @@ final class SplitViewRootPresenter: RootViewPresenter {
             content = notificationsContent
         case .reader:
             content = readerPresenter
+            readerPresenter.splitViewController = splitVC
+
         }
 
         display(content: content)