claude refactorings, flutter best practices, platform dependent changes, general cleanup

lib/api/webuntis/queries/get_timetable/get_timetable.dart

@@ -0,0 +1,18 @@
+import 'dart:convert';
+
+import '../../webuntis_api.dart';
+import 'get_timetable_params.dart';
+import 'get_timetable_response.dart';
+
+class GetTimetable extends WebuntisApi {
+  GetTimetableParams params;
+
+  GetTimetable(this.params) : super('getTimetable', params);
+
+  @override
+  Future<GetTimetableResponse> run() async {
+    final rawAnswer = await query(this);
+    return finalize(GetTimetableResponse.fromJson(jsonDecode(rawAnswer) as Map<String, dynamic>));
+  }
+
+}