butto to import file

lib/screens/deck_import_screen.dart

@@ -1,4 +1,6 @@
 import 'dart:convert';
+
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:practice_engine/practice_engine.dart';
@@ -271,6 +273,30 @@ class _DeckImportScreenState extends State<DeckImportScreen> {
     showTopSnackBar(context, message: 'JSON copied to clipboard');
   }
 
+  Future<void> _pickJsonFile() async {
+    final result = await FilePicker.platform.pickFiles(
+      type: FileType.custom,
+      allowedExtensions: ['json'],
+      withData: true,
+    );
+    if (result == null || result.files.isEmpty || !mounted) return;
+    final file = result.files.single;
+    if (file.bytes == null) {
+      if (mounted) {
+        showTopSnackBar(context, message: 'Could not read file content');
+      }
+      return;
+    }
+    final text = utf8.decode(file.bytes!);
+    setState(() {
+      _errorMessage = null;
+      _jsonController.text = text;
+    });
+    if (mounted) {
+      showTopSnackBar(context, message: 'File loaded');
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -393,6 +419,11 @@ class _DeckImportScreenState extends State<DeckImportScreen> {
                         Row(
                           mainAxisSize: MainAxisSize.min,
                           children: [
+                            TextButton.icon(
+                              onPressed: _pickJsonFile,
+                              icon: const Icon(Icons.folder_open),
+                              label: const Text('Select file'),
+                            ),
                             TextButton.icon(
                               onPressed: _loadSampleDeck,
                               icon: const Icon(Icons.description),

pubspec.lock

@@ -41,6 +41,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: "28bb3ae56f117b5aec029d702a90f57d285cd975c3c5c281eaca38dbc47c5937"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.5+2"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -73,6 +81,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.0.1"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      sha256: ab13ae8ef5580a411c458d6207b6774a6c237d77ac37011b13994879f68a8810
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.3.7"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -86,6 +102,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.2"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      sha256: ee8068e0e1cd16c4a82714119918efdeed33b3ba7772c54b5d094ab53f9b7fd1
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.33"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -340,6 +364,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      sha256: d7cb55e04cd34096cd3a79b3330245f54cb96a370a1c27adb3c84b917de8b08e
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.15.0"
   xdg_directories:
     dependency: transitive
     description:

pubspec.yaml

@@ -13,6 +13,7 @@ dependencies:
     path: packages/practice_engine
   cupertino_icons: ^1.0.6
   shared_preferences: ^2.2.2
+  file_picker: ^8.1.6
 
 dev_dependencies:
   flutter_test: