Save and sort sheets by last access time

lib/main.dart

@@ -1,10 +1,15 @@
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:hive/hive.dart';
 import 'package:logging/logging.dart';
+import 'package:path_provider/path_provider.dart';
 import 'package:pdfrx/pdfrx.dart';
 
 import 'login_page.dart';
 
-void main() {
+Future<void> main() async {
   Logger.root.level = Level.ALL; // defaults to Level.INFO
   Logger.root.onRecord.listen((record) {
     debugPrint('${record.level.name}: ${record.time}: ${record.message}');
@@ -13,7 +18,12 @@ void main() {
     }
   });
 
-  pdfrxFlutterInitialize(); // Needed for web
+  pdfrxFlutterInitialize(); // Needed especially for web
+
+  if (!kIsWeb) {
+    Directory dir = await getApplicationDocumentsDirectory();
+    Hive.init(dir.path); // Needed only if not web
+  }
 
   runApp(const MyApp());
 }