fix permission error on desktop

lib/canvas/my_painter.dart

@@ -59,9 +59,8 @@ class MyPainter extends CustomPainter {
         Offset pt2 = stroke.points[i + 1].point;
         pt2 = _translatept(pt2, size);
 
-        // final strokewidth = _calcAngleDependentWidth(pt1, pt2, stroke.points[i].thickness);
         canvas.drawLine(
-            pt1, pt2, paint..strokeWidth = stroke.points[i].thickness);
+            pt1, pt2, paint..strokeWidth = stroke.points[i].thickness * zoom);
       }
     }
   }

lib/main.dart

@@ -11,15 +11,15 @@ void main() async {
       defaultTargetPlatform != TargetPlatform.iOS) {
     sqfliteFfiInit();
     databaseFactory = databaseFactoryFfi;
-  }
+  } else {
+    WidgetsFlutterBinding.ensureInitialized();
 
-  WidgetsFlutterBinding.ensureInitialized();
+    Map<Permission, PermissionStatus> statuses =
+        await [Permission.manageExternalStorage, Permission.storage].request();
 
-  Map<Permission, PermissionStatus> statuses =
-      await [Permission.manageExternalStorage, Permission.storage].request();
-
-  if (statuses.containsValue(PermissionStatus.denied)) {
-    // todo some error handling
+    if (statuses.containsValue(PermissionStatus.denied)) {
+      // todo some error handling
+    }
   }
 
   runApp(const MaterialApp(home: App()));

lib/savesystem/note_file.dart

@@ -44,6 +44,6 @@ class NoteFile {
   Future<void> close() async {
     // shrink the db file size
     await _db.execute('VACUUM');
-    _db.close();
+    await _db.close();
   }
 }