fix: attaching KeyboardTrackingView (#1193)

## 📜 Description

Fixed a problem of non working `onMove` handler in development builds.

## 💡 Motivation and Context

In
#1184
I started to rely that `didBecomeActive` event will be caught and we can
attach the view from this listener. But turns out that in dev builds we
miss this event. So at the moment:
- view hierarchy may be not ready by time of creating
`KeyboardTrackingView` (noticeable in release versions);
- after `didBecomeActive` hierarchy is ready (but we may miss this event
if we subscribed later, and also we rely on sequence of Apple events and
it's kind of transitive dependencies that may break at any point of
time).

So I decided to re-work the approach. We attach `KeyboardControllerView`
anyway, so I thought it's good to add a side effect in `didMoveToWindow`
and attach our `KeyboardTrackingView`. For that I added optional param
to `attachToTopmostView` method (called `toWindow/window`). If we pass
the window then we use that param, otherwise rely on `activeWindow` and
take `rootViewController.view`.

Such combination seems to solve all these issues when `onMove` stops
working under certain conditions. Now we always pass a window reference
for a first mount and don't rely on internal Apple timing and events.

Closes
#1191

## 📢 Changelog

<!-- High level overview of important changes -->
<!-- For example: fixed status bar manipulation; added new types
declarations; -->
<!-- If your changes don't affect one of platform/language below - then
remove this platform/language -->

### E2E

- sync assets with working `onMove` handler on iOS 26;

### iOS

- make `KeyboardTrackingView` public;
- pass `toWindow/window` into `attachToTopmostView` method;
- pass `window` into `attachToTopmostView` from `didMoveToWindow`
lifecycle.

## 🤔 How Has This Been Tested?

Tested:
- iPhone 16 Pro, iOS 26 (XCode 16, physical device) - repro app
(release/debug + cold start); ✅
- iPhone 16 Pro, iOS 26 (XCode 16, simulator) - example app
(release/debug + cold start) + Modal in separate window example; ✅
- iPhone 16 Pro, iOS 26 (XCode 26, simulator) - example app
(release/debug + cold start) + Modal in separate window example; ✅

## 📸 Screenshots (if appropriate):

|Before (debug)|After (debug)|Release repro|
|-------|----|--------------|
|<video
src="https://github.com/user-attachments/assets/9af9992c-462c-45fc-8d2e-51d2fbe66dd9">|<video
src="https://github.com/user-attachments/assets/7dcabd42-7310-4251-9870-29ba7c073517">|<video
src="https://github.com/user-attachments/assets/68bd986f-7c1e-414f-a492-9178d72d5b8a">|

## 📝 Checklist

- [x] CI successfully passed
- [x] I added new mocks and corresponding unit-tests if library API was
changed

Author: kirillzyusko

e2e/kit/assets/ios/iPhone 17 Pro/AwareScrollViewDisabledStateKeyboardClosed.png

@@ -11,7 +11,7 @@ import UIKit
  * A compatibility view that resolves to `KeyboardView` on iOS < 26
  * and uses `keyboardLayoutGuide` on iOS 26+.
  */
-final class KeyboardTrackingView: UIView {
+public final class KeyboardTrackingView: UIView {
   private var keyboardView: UIView? { KeyboardViewLocator.shared.resolve() }
   private var keyboardHeight = 0.0
   private weak var currentAttachedView: UIView?
@@ -56,23 +56,17 @@ final class KeyboardTrackingView: UIView {
       name: UIResponder.keyboardDidShowNotification,
       object: nil
     )
-    NotificationCenter.default.addObserver(
-      self,
-      selector: #selector(attachToTopmostView),
-      name: UIApplication.didBecomeActiveNotification,
-      object: nil
-    )
   }
 
-  override func willMove(toWindow newWindow: UIWindow?) {
+  override public func willMove(toWindow newWindow: UIWindow?) {
     // When the view is being removed from the window, we need to re-attach it
     if newWindow == nil, !isAttaching {
       attachToTopmostView()
     }
   }
 
-  @objc private func attachToTopmostView() {
-    guard let topView = UIApplication.topViewController()?.view else { return }
+  @objc public func attachToTopmostView(toWindow window: UIWindow? = nil) {
+    guard let topView = (window?.rootViewController ?? UIApplication.topViewController())?.view else { return }
 
     if currentAttachedView === topView { return }
 

e2e/kit/assets/ios/iPhone 17 Pro/AwareScrollViewDisabledStateKeyboardOpened.png

@@ -18,7 +18,7 @@ public class KeyboardMovementObserver: NSObject {
   var onRequestAnimation: () -> Void
   var onCancelAnimation: () -> Void
   // progress tracker
-  var keyboardTrackingView = KeyboardTrackingView()
+  @objc public var keyboardTrackingView = KeyboardTrackingView()
   var animation: KeyboardAnimation?
 
   var prevKeyboardPosition = 0.0

e2e/kit/assets/ios/iPhone 17 Pro/AwareScrollViewKeyboardClosedWithoutBackScroll.png

@@ -259,6 +259,14 @@ - (void)willMoveToSuperview:(UIView *)newSuperview
   }
 }
 
+- (void)didMoveToWindow
+{
+  [super didMoveToWindow];
+  if (self.window) {
+    [keyboardObserver.keyboardTrackingView attachToTopmostViewToWindow:self.window];
+  }
+}
+
 - (void)mount
 {
   [inputObserver mount];

e2e/kit/assets/ios/iPhone 17 Pro/AwareScrollViewSecondInputFocused.png

@@ -85,6 +85,13 @@ class KeyboardControllerView: UIView {
     }
   }
 
+  override func didMoveToWindow() {
+    super.didMoveToWindow()
+    if window != nil {
+      keyboardObserver?.keyboardTrackingView.attachToTopmostView(toWindow: window)
+    }
+  }
+
   override func layoutSubviews() {
     super.layoutSubviews()