chore: set Home page navigation item hidden on iPad

Mastodon/Scene/Root/ContentSplitViewController.swift

@@ -31,6 +31,10 @@ final class ContentSplitViewController: UIViewController, NeedsDependency {
     @Published var currentSupplementaryTab: MainTabBarController.Tab = .home
     private(set) lazy var mainTabBarController: MainTabBarController = {
         let mainTabBarController = MainTabBarController(context: context, coordinator: coordinator)
+        if let homeTimelineViewController = mainTabBarController.viewController(of: HomeTimelineViewController.self) {
+            homeTimelineViewController.viewModel.displayComposeBarButtonItem.value = false
+            homeTimelineViewController.viewModel.displaySettingBarButtonItem.value = false
+        }
         return mainTabBarController
     }()