wip: fix liked null value

api/lib/src/models/scheme.dart

@@ -98,7 +98,7 @@ SimpleSchemeTransMetaData transSimpleSchemeMetaData(SimpleScheme scheme) => Simp
       uuid: scheme.uuid,
       name: scheme.name,
       shared: scheme.shared,
-      liked: scheme.liked,
+      liked: scheme.liked ?? false,
       likes: scheme.metadata?['likes'] ?? 0,
       downloads: scheme.metadata?['downloads'] ?? 0,
     );

app/lib/widgets/me.dart

@@ -114,7 +114,7 @@ class _MeWidgetState extends State<MeWidget> {
                               if (mounted && value != null)
                                 setState(() {
                                   _schemes = value;
-                                  _selected = value.first.uuid;
+                                  _selected = value.isEmpty ? null : value.first.uuid;
                                 });
                             });
                           },