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lib/services/file_picker_service_native.dart

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+import 'dart:typed_data';
+
+import 'package:image_picker/image_picker.dart';
+
+Future<Uint8List?> pickImageBytes() async {
+  final picker = ImagePicker();
+  final file = await picker.pickImage(source: ImageSource.gallery);
+  if (file == null) return null;
+  return await file.readAsBytes();
+}