TF-4075 Jump to attachments list position on web responsive mobile

core/lib/core.dart

@@ -17,6 +17,7 @@ export 'presentation/extensions/tap_down_details_extension.dart';
 export 'presentation/extensions/map_extensions.dart';
 export 'presentation/extensions/either_view_state_extension.dart';
 export 'presentation/extensions/media_type_extension.dart';
+export 'presentation/extensions/scroll_controller_extension.dart';
 
 // Exceptions
 export 'domain/exceptions/download_file_exception.dart';

core/lib/presentation/extensions/scroll_controller_extension.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+
+extension ScrollControllerExtension on ScrollController {
+  void scrollToWidgetTop({
+    required GlobalKey key,
+    double padding = 70,
+  }) {
+    final context = key.currentContext;
+    if (context == null) return;
+
+    final renderBox = context.findRenderObject();
+    if (renderBox is! RenderBox) return;
+
+    final offsetY = renderBox.localToGlobal(Offset.zero).dy;
+    final currentScroll = offset;
+
+    final targetOffset = (currentScroll + offsetY - padding).clamp(
+      position.minScrollExtent,
+      position.maxScrollExtent,
+    );
+
+    animateTo(
+      targetOffset,
+      duration: const Duration(milliseconds: 500),
+      curve: Curves.easeInOut,
+    );
+  }
+}