scoring done

lib/src/models/kanji_item.dart

@@ -1,9 +1,28 @@
+enum QuizMode { kanjiToEnglish, englishToKanji, reading }
+
+class SrsItem {
+  final int kanjiId;
+  final QuizMode quizMode;
+  final String? readingType; // 'onyomi' or 'kunyomi'
+  int srsStage;
+  DateTime lastAsked;
+
+  SrsItem({
+    required this.kanjiId,
+    required this.quizMode,
+    this.readingType,
+    this.srsStage = 0,
+    DateTime? lastAsked,
+  }) : lastAsked = lastAsked ?? DateTime.now();
+}
+
 class KanjiItem {
   final int id;
   final String characters;
   final List<String> meanings;
   final List<String> onyomi;
   final List<String> kunyomi;
+  final Map<String, SrsItem> srsItems = {};
 
   KanjiItem({
     required this.id,