Fix #8565-8579: Re-enable Screen-Time.

Sources/Brave/Frontend/Browser/BrowserViewController.swift

@@ -380,8 +380,7 @@ public class BrowserViewController: UIViewController {
     }
 
     if Preferences.Privacy.screenTimeEnabled.value {
-      // Enable once fixed, ref #8566
-      //screenTimeViewController = STWebpageController()
+      screenTimeViewController = STWebpageController()
     }
   }
 
@@ -1251,11 +1250,7 @@ public class BrowserViewController: UIViewController {
       make.leading.trailing.equalTo(self.view)
     }
 
-    if let screenTimeViewController = screenTimeViewController {
-      webViewContainer.addSubview(screenTimeViewController.view)
-      addChild(screenTimeViewController)
-      screenTimeViewController.didMove(toParent: self)
-
+    if let screenTimeViewController = screenTimeViewController, screenTimeViewController.parent != nil {
       screenTimeViewController.view.snp.remakeConstraints {
         $0.edges.equalTo(webViewContainer)
       }
@@ -1945,6 +1940,7 @@ public class BrowserViewController: UIViewController {
       }
 
       updateInContentHomePanel(url as URL)
+      updateScreenTimeUrl(url)
       updatePlaylistURLBar(tab: tab, state: tab.playlistItemState, item: tab.playlistItem)
     }
   }
@@ -3321,13 +3317,13 @@ extension BrowserViewController: PreferencesObserver {
       recordAdsUsageType()
     case Preferences.Privacy.screenTimeEnabled.key:
       if Preferences.Privacy.screenTimeEnabled.value {
-        // Enable once fixed, ref #8566
-        //screenTimeViewController = STWebpageController()
+        screenTimeViewController = STWebpageController()
         if let tab = tabManager.selectedTab {
           recordScreenTimeUsage(for: tab)
         }
       } else {
         screenTimeViewController?.view.removeFromSuperview()
+        screenTimeViewController?.willMove(toParent: nil)
         screenTimeViewController?.removeFromParent()
         screenTimeViewController?.suppressUsageRecording = true
         screenTimeViewController = nil

Sources/Brave/Frontend/Browser/BrowserViewController/BVC+ScreenTime.swift

@@ -12,12 +12,22 @@ extension BrowserViewController {
   /// There is also one hack required: STWebpageController breaks if you pass scheme other than http or https,
   /// it will not block anything for the rest of its lifecycle. Our internal urls have to be bridged to an empty https url.
   func updateScreenTimeUrl(_ url: URL?) {
+    guard let screenTimeViewController = screenTimeViewController else {
+      return
+    }
+
     guard let url = url, (url.scheme == "http" || url.scheme == "https") else {
-      screenTimeViewController?.url = URL(string: "https://about:blank")
+      // This is signficantly better than removing the view controller from the screen!
+      // If we use `nil` instead, STViewController goes into a broken state PERMANENTLY until the app is restarted
+      // The URL cannot be nil, and it cannot be anything other than http(s) otherwise it will break
+      // for the duration of the app.
+      // Chromium solves this issue by not setting the URL, but instead removing it from the view entirely.
+      // But setting the URL to an empty URL works too.
+      screenTimeViewController.url = NSURL() as URL
       return
     }
 
-    screenTimeViewController?.url = url
+    screenTimeViewController.url = url
   }
 
   func recordScreenTimeUsage(for tab: Tab) {

Sources/Brave/Frontend/Browser/BrowserViewController/BrowserViewController+TabManagerDelegate.swift

@@ -64,6 +64,20 @@ extension BrowserViewController: TabManagerDelegate {
       webView.snp.remakeConstraints { make in
         make.left.right.top.bottom.equalTo(self.webViewContainer)
       }
+
+      // Add ScreenTime above the WebView
+      if let screenTimeViewController = screenTimeViewController {
+        if screenTimeViewController.parent == nil {
+          addChild(screenTimeViewController)
+          screenTimeViewController.didMove(toParent: self)
+        }
+
+        webViewContainer.addSubview(screenTimeViewController.view)
+
+        screenTimeViewController.view.snp.remakeConstraints {
+          $0.edges.equalTo(webViewContainer)
+        }
+      }
 
       // This is a terrible workaround for a bad iOS 12 bug where PDF
       // content disappears any time the view controller changes (i.e.
@@ -137,6 +151,7 @@ extension BrowserViewController: TabManagerDelegate {
       topToolbar.updateReaderModeState(ReaderModeState.unavailable)
     }
 
+    updateScreenTimeUrl(tabManager.selectedTab?.url)
     updateInContentHomePanel(selected?.url as URL?)
 
     notificationsPresenter.removeNotification(with: WalletNotification.Constant.id)

Sources/Brave/Frontend/Browser/BrowserViewController/BrowserViewController+ToolbarDelegate.swift

@@ -335,6 +335,7 @@ extension BrowserViewController: TopToolbarDelegate {
   func topToolbarDidLeaveOverlayMode(_ topToolbar: TopToolbarView) {
     hideSearchController()
     hideFavoritesController()
+    updateScreenTimeUrl(tabManager.selectedTab?.url)
     updateInContentHomePanel(tabManager.selectedTab?.url as URL?)
     updateTabsBarVisibility()
     if isUsingBottomBar {

Sources/Brave/Frontend/ClientPreferences.swift

@@ -133,7 +133,7 @@ extension Preferences {
     /// The toggles states for clear private data screen
     static let clearPrivateDataToggles = Option<[Bool]>(key: "privacy.clear-data-toggles", default: [])
     /// Enables the Apple's Screen Time feature.
-    public static let screenTimeEnabled = Option<Bool>(key: "privacy.screentime", default: true)
+    public static let screenTimeEnabled = Option<Bool>(key: "privacy.screentime-toggle", default: AppConstants.buildChannel != .release)
 
   }
   final public class NewTabPage {

Sources/Brave/Frontend/Settings/Features/ShieldsPrivacy/OtherPrivacySettingsSectionView.swift

@@ -69,14 +69,11 @@ struct OtherPrivacySettingsSectionView: View {
         subtitle: String.localizedStringWithFormat(Strings.googleSafeBrowsingUsingWebKitDescription, URL.brave.safeBrowsingHelp.absoluteString),
         option: Preferences.Shields.googleSafeBrowsing
       )
-      // Enable once fixed, ref #8566
-      /*
       OptionToggleView(
         title: Strings.screenTimeSetting,
         subtitle: String.localizedStringWithFormat(Strings.screenTimeSettingDescription, URL.brave.screenTimeHelp.absoluteString),
         option: Preferences.Privacy.screenTimeEnabled
       )
-       */
       ShieldToggleView(
         title: Strings.P3A.settingTitle,
         subtitle: Strings.P3A.settingSubtitle,