新增文本题库导入功能，题目新增“解析”字段

api/models/quiz.ts

@@ -23,6 +23,7 @@ export interface QuizAnswer {
   questionType?: string;
   correctAnswer?: string | string[];
   questionScore?: number;
+  questionAnalysis?: string;
 }
 
 export interface SubmitAnswerData {
@@ -195,7 +196,7 @@ export class QuizModel {
       SELECT a.id, a.record_id as recordId, a.question_id as questionId, 
              a.user_answer as userAnswer, a.score, a.is_correct as isCorrect, 
              a.created_at as createdAt,
-             q.content as questionContent, q.type as questionType, q.answer as correctAnswer, q.score as questionScore
+             q.content as questionContent, q.type as questionType, q.answer as correctAnswer, q.score as questionScore, q.analysis as questionAnalysis
       FROM quiz_answers a 
       JOIN questions q ON a.question_id = q.id 
       WHERE a.record_id = ? 
@@ -215,7 +216,8 @@ export class QuizModel {
       questionContent: row.questionContent,
       questionType: row.questionType,
       correctAnswer: this.parseAnswer(row.correctAnswer, row.questionType),
-      questionScore: row.questionScore
+      questionScore: row.questionScore,
+      questionAnalysis: row.questionAnalysis ?? ''
     }));
   }