Фикс: исправлен скролл реплай-сообщений под композер при отправке

Rosetta/Features/Chats/ChatDetail/NativeMessageList.swift

@@ -86,6 +86,13 @@ final class NativeMessageListController: UIViewController {
     /// Cleared only when isInputFocused becomes true (user tap or reply action).
     fileprivate(set) var keyboardBlockedUntilUserTap = false
     private var currentKeyboardHeight: CGFloat = 0
+    /// Timestamp of the last animated scrollToBottom call.
+    /// When recent (< 1s), applyInsets/keyboardWillChangeFrame snap to
+    /// -newInsetTop instead of compensating from the intermediate offset.
+    /// A timestamp is used instead of a boolean flag because UIKit cancels
+    /// the scroll animation when contentInset changes, firing
+    /// scrollViewDidEndScrollingAnimation prematurely.
+    private var scrollToBottomTimestamp: CFAbsoluteTime = 0
 
     // MARK: - Scroll-to-Bottom Button
     private var scrollToBottomButton: UIButton?
@@ -762,16 +769,27 @@ final class NativeMessageListController: UIViewController {
         // Capture offset BEFORE setting insets — UIKit may auto-clamp after.
         let oldOffset = collectionView.contentOffset.y
 
+        let recentScrollToBottom = CFAbsoluteTimeGetCurrent() - scrollToBottomTimestamp < 1.0
+
         collectionView.contentInset = UIEdgeInsets(top: newInsetTop, left: 0, bottom: topInset, right: 0)
         collectionView.scrollIndicatorInsets = collectionView.contentInset
 
-        // Always compensate symmetrically: open AND close.
-        // Setting exact `oldOffset - delta` overrides any UIKit auto-clamping.
-        let shouldCompensate = abs(delta) > 0.5
-            && !collectionView.isDragging
-            && !collectionView.isDecelerating
-        if shouldCompensate {
-            collectionView.contentOffset.y = oldOffset - delta
+        if recentScrollToBottom && abs(delta) > 0.5 {
+            // An animated scroll-to-bottom was recently started.
+            // Reading contentOffset during the animation returns an intermediate
+            // value — compensating from it produces a wrong final position.
+            // Snap to the new bottom instead.
+            collectionView.setContentOffset(
+                CGPoint(x: 0, y: -newInsetTop), animated: false
+            )
+        } else {
+            // Normal compensation: preserve reading position.
+            let shouldCompensate = abs(delta) > 0.5
+                && !collectionView.isDragging
+                && !collectionView.isDecelerating
+            if shouldCompensate {
+                collectionView.contentOffset.y = oldOffset - delta
+            }
         }
         updateScrollToBottomBadge()
     }
@@ -779,6 +797,7 @@ final class NativeMessageListController: UIViewController {
     /// Scroll to the newest message (visual bottom = offset 0 in inverted scroll).
     func scrollToBottom(animated: Bool) {
         guard !messages.isEmpty else { return }
+        if animated { scrollToBottomTimestamp = CFAbsoluteTimeGetCurrent() }
         collectionView.setContentOffset(
             CGPoint(x: 0, y: -collectionView.contentInset.top),
             animated: animated
@@ -874,7 +893,10 @@ final class NativeMessageListController: UIViewController {
         // Capture offset BEFORE animation — UIKit may auto-clamp after inset change.
         // Skip compensation during swipe-back — let content slide down naturally.
         let oldOffset = collectionView.contentOffset.y
-        let shouldCompensate = !isDisappearing
+        let recentScroll = CFAbsoluteTimeGetCurrent() - scrollToBottomTimestamp < 1.0
+        let snapToBottom = recentScroll && abs(delta) > 0.5
+        let shouldCompensate = !snapToBottom
+            && !isDisappearing
             && abs(delta) > 0.5
             && !collectionView.isDragging
             && !collectionView.isDecelerating
@@ -886,8 +908,10 @@ final class NativeMessageListController: UIViewController {
             self.collectionView.contentInset = UIEdgeInsets(top: newInsetTop, left: 0, bottom: topInset, right: 0)
             self.collectionView.scrollIndicatorInsets = self.collectionView.contentInset
 
-            // Enforce exact offset — overrides any UIKit auto-clamping.
-            if shouldCompensate {
+            if snapToBottom {
+                // Recent scroll-to-bottom — maintain bottom target.
+                self.collectionView.contentOffset.y = -newInsetTop
+            } else if shouldCompensate {
                 self.collectionView.contentOffset.y = oldOffset - delta
             }
 
@@ -951,6 +975,7 @@ extension NativeMessageListController: UICollectionViewDelegate {
             onPaginationTrigger?()
         }
     }
+
 }
 
 // MARK: - ComposerViewDelegate
@@ -1146,6 +1171,11 @@ struct NativeMessageListView: UIViewControllerRepresentable {
         // Sync composer state (iOS < 26)
         if useUIKitComposer {
             syncComposerState(controller)
+            // Force immediate layout to process pending height change from reply
+            // bar show/hide. Without this, height report is deferred to
+            // DispatchQueue.main.async, and scrollToBottom may calculate offset
+            // before contentInset reflects the new composer height.
+            controller.composerView?.layoutIfNeeded()
         }
 
         // Update messages
@@ -1223,11 +1253,6 @@ struct NativeMessageListView: UIViewControllerRepresentable {
     private func syncComposerState(_ controller: NativeMessageListController) {
         guard let composer = controller.composerView else { return }
         composer.setText(messageText)
-        #if DEBUG
-        if replySenderName != nil {
-            print("📋 syncComposer: sender=\(replySenderName ?? "nil") preview=\(replyPreviewText ?? "nil")")
-        }
-        #endif
         composer.setReply(senderName: replySenderName, previewText: replyPreviewText)
 
         // After swipe-back dismisses keyboard, block programmatic re-focus