fix: хм

lib/core/utils/route_settle.dart

@@ -0,0 +1,81 @@
+import 'dart:async';
+
+import 'package:flutter/widgets.dart';
+
+class RouteSettle {
+  RouteSettle({required this.isMounted});
+
+  static const Duration _safetyMargin = Duration(milliseconds: 250);
+
+  final bool Function() isMounted;
+  final List<VoidCallback> _queued = <VoidCallback>[];
+  Animation<double>? _animation;
+  Timer? _timer;
+  bool _bindScheduled = false;
+  bool _settled = false;
+  bool _disposed = false;
+
+  bool get settled => _settled;
+
+  void bind(BuildContext context) {
+    if (_disposed || _settled || _bindScheduled || _animation != null) return;
+    _bindScheduled = true;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _bindScheduled = false;
+      if (_disposed || _settled) return;
+      if (!isMounted()) {
+        settleNow();
+        return;
+      }
+      _attach(context);
+    });
+  }
+
+  void run(VoidCallback action) {
+    if (_settled) {
+      action();
+      return;
+    }
+    _queued.add(action);
+  }
+
+  void settleNow() {
+    if (_disposed || _settled) return;
+    _settled = true;
+    _detach();
+    final pending = List<VoidCallback>.of(_queued);
+    _queued.clear();
+    if (!isMounted()) return;
+    for (final action in pending) {
+      action();
+    }
+  }
+
+  void dispose() {
+    _disposed = true;
+    _detach();
+    _queued.clear();
+  }
+
+  void _attach(BuildContext context) {
+    final route = ModalRoute.of(context);
+    final animation = route?.animation;
+    if (animation == null || animation.status == AnimationStatus.completed) {
+      settleNow();
+      return;
+    }
+    _animation = animation..addStatusListener(_onStatus);
+    _timer = Timer(route!.transitionDuration + _safetyMargin, settleNow);
+  }
+
+  void _onStatus(AnimationStatus status) {
+    if (status == AnimationStatus.completed) settleNow();
+  }
+
+  void _detach() {
+    _animation?.removeStatusListener(_onStatus);
+    _animation = null;
+    _timer?.cancel();
+    _timer = null;
+  }
+}