fixed a bug avoid crack answer

server/routes/vocabulary.ts

@@ -48,6 +48,7 @@ const WORD_RECORD_MODES: WordRecordModeKey[] = [
 const ATTEMPT_TTL_MS = 30 * 60 * 1000;
 const MIN_SECONDS_PER_QUESTION = Number(process.env.VOCABULARY_MIN_SECONDS_PER_QUESTION || 0.4);
 const ATTEMPT_SECRET = process.env.VOCABULARY_ATTEMPT_SECRET || config.JWT_SECRET;
+const ANSWER_PROOF_SALT = 'd1ktsalt';
 
 const isVocabularyTestType = (value: unknown): value is VocabularyTestType => {
   return value === 'chinese-to-english' ||
@@ -104,8 +105,8 @@ const buildAnswerProof = (
   userAnswer: string,
   submittedAt: number
 ): string => crypto
-  .createHash('sha256')
+  .createHash('md5')
-  .update(`${attemptId}:${questionToken}:${submittedAt}:${String(userAnswer ?? '')}`)
+  .update(`${ANSWER_PROOF_SALT}:${attemptId}:${questionToken}:${submittedAt}:${String(userAnswer ?? '')}:${ANSWER_PROOF_SALT}`)
   .digest('hex');
 
 const buildMultipleChoiceOptions = (word: any, pool: any[]): string[] => {
@@ -879,6 +880,7 @@ router.post('/test-record', authMiddleware, async (req, res) => {
       message: '测试记录已保存',
       attemptId: attempt._id.toString(),
       stats: verifiedStats,
+      results: evaluatedResults,
       submittedAt: new Date(lastSubmittedAtMs)
     });
   } catch (error) {

src/components/VocabularyStudy.tsx

@@ -93,6 +93,7 @@ interface SavedVocabularyTestRecordResponse {
     endTime: string | Date;
     duration: number;
   };
+  results: TestResult[];
 }
 
 interface TestAttemptResponse {
@@ -102,6 +103,8 @@ interface TestAttemptResponse {
   questions: TestQuestion[];
 }
 
+const ANSWER_PROOF_SALT = 'd1ktsalt';
+
 const VocabularyStudy: React.FC = () => {
   const navigate = useNavigate();
   const [loading, setLoading] = useState(false);
@@ -124,7 +127,6 @@ const VocabularyStudy: React.FC = () => {
   const [testStarted, setTestStarted] = useState(false);
   const [testFinished, setTestFinished] = useState(false);
   const [testResults, setTestResults] = useState<TestResult[]>([]);
-  const [answerFeedback, setAnswerFeedback] = useState<TestResult | null>(null);
   const [testAttemptId, setTestAttemptId] = useState<string>('');
   const [pendingAnswers, setPendingAnswers] = useState<PendingAnswer[]>([]);
   const [testAttemptLoading, setTestAttemptLoading] = useState(false);
@@ -429,7 +431,6 @@ const VocabularyStudy: React.FC = () => {
       setTestAttemptId('');
       setPendingAnswers([]);
       setTestResults([]);
-      setAnswerFeedback(null);
       const wordIds = studyWords.map(getWordId).filter(Boolean);
       if (wordIds.length === 0) {
         message.error('单词数据不完整，请重新加载后再试');
@@ -457,6 +458,7 @@ const VocabularyStudy: React.FC = () => {
       setTestResults([]);
       setPendingAnswers([]);
       setOptions(questions[0]?.options || []);
+      setIsModalVisible(false);
       setStudyStats({
         totalWords: 0,
         correctWords: 0,
@@ -493,42 +495,7 @@ const VocabularyStudy: React.FC = () => {
     userAnswer: string,
     submittedAt: number
   ): string => {
-    return CryptoJS.SHA256(`${attemptId}:${questionToken}:${submittedAt}:${userAnswer}`).toString();
+    return CryptoJS.MD5(`${ANSWER_PROOF_SALT}:${attemptId}:${questionToken}:${submittedAt}:${userAnswer}:${ANSWER_PROOF_SALT}`).toString();
-  };
-
-  function normalizeAnswer(str: string): string {
-    return str
-      .replace(/（/g, '(')
-      .replace(/）/g, ')')
-      .replace(/，/g, ',')      // 全角逗号转半角
-      .replace(/\s+/g, '')      // 去除所有空格
-      .replace(/,/g, '')        // 去除所有逗号
-      .replace(/[^\w()]/g, '')  // 只保留字母、数字、括号
-      .toLowerCase();
-  }
-
-  const getQuestionWord = (question: TestQuestion): Word | undefined => {
-    return studyWords.find(word => getWordId(word) === question.wordId);
-  };
-
-  const buildLocalTestResult = (question: TestQuestion, rawUserAnswer: string): TestResult => {
-    const matchedWord = getQuestionWord(question);
-    const userAnswer = rawUserAnswer.trim();
-    const correctAnswer = testType === 'multiple-choice'
-      ? String(matchedWord?.translation ?? question.translation ?? '').trim()
-      : String(matchedWord?.word ?? question.word ?? '').trim();
-    const isCorrect = testType === 'multiple-choice'
-      ? userAnswer === correctAnswer
-      : normalizeAnswer(userAnswer) === normalizeAnswer(correctAnswer);
-
-    return {
-      questionToken: question.questionToken,
-      wordId: question.wordId,
-      word: String(matchedWord?.word ?? question.word ?? question.translation ?? '').trim(),
-      userAnswer,
-      correctAnswer,
-      isCorrect
-    };
   };
 
   // 提交答案
@@ -543,7 +510,6 @@ const VocabularyStudy: React.FC = () => {
     }
     const submittedAt = Date.now();
     const normalizedUserAnswer = userAnswer.trim();
-    const localResult = buildLocalTestResult(currentQuestion, normalizedUserAnswer);
     const answerProof = buildAnswerProof(
       testAttemptId,
       currentQuestion.questionToken,
@@ -560,14 +526,8 @@ const VocabularyStudy: React.FC = () => {
         answerProof
       }
     ];
-    const updatedTestResults = [
-      ...testResults,
-      localResult
-    ];
 
     setPendingAnswers(updatedPendingAnswers);
-    setTestResults(updatedTestResults);
-    setAnswerFeedback(localResult);
     setShowAnswer(true);
     setUserAnswer('');
 
@@ -576,7 +536,6 @@ const VocabularyStudy: React.FC = () => {
         const nextIndex = testIndex + 1;
         setTestIndex(nextIndex);
         setShowAnswer(false);
-        setAnswerFeedback(null);
         answerSubmittingRef.current = false;
         if (testType === 'audio-to-english') {
           setTimeout(() => {
@@ -588,31 +547,14 @@ const VocabularyStudy: React.FC = () => {
         }
       } else {
         answerSubmittingRef.current = false;
-        finishTestWithResults(updatedPendingAnswers, updatedTestResults);
+        finishTestWithResults(updatedPendingAnswers);
       }
     }, 1500);
   };
 
   // 使用指定结果完成测试
-  const finishTestWithResults = async (finalAnswers: PendingAnswer[], finalResults: TestResult[]) => {
+  const finishTestWithResults = async (finalAnswers: PendingAnswer[]) => {
     try {
-      const lastSubmittedAtMs = finalAnswers.length > 0
-        ? Math.max(...finalAnswers.map(item => item.submittedAt))
-        : Date.now();
-      const localCorrectWords = finalResults.filter(result => result.isCorrect).length;
-      const localStats = {
-        totalWords: finalResults.length,
-        correctWords: localCorrectWords,
-        accuracy: finalResults.length > 0 ? (localCorrectWords / finalResults.length) * 100 : 0,
-        startTime: studyStats.startTime,
-        endTime: new Date(lastSubmittedAtMs),
-        duration: Math.max(0, (lastSubmittedAtMs - studyStats.startTime.getTime()) / 1000)
-      };
-
-      setTestResults(finalResults);
-      setStudyStats(localStats);
-      setTestFinished(true);
-
       // 添加调试信息
       console.log('测试完成状态(带结果):', {
         finalResultsLength: finalAnswers.length,
@@ -640,8 +582,11 @@ const VocabularyStudy: React.FC = () => {
         endTime: new Date(savedRecord.stats.endTime),
         duration: savedRecord.stats.duration
       });
+      setTestResults(savedRecord.results);
       setPendingAnswers([]);
       setTestAttemptId('');
+      setShowAnswer(false);
+      setTestFinished(true);
       
       message.success('测试完成，记录已保存');
       setIsModalVisible(true);
@@ -657,7 +602,7 @@ const VocabularyStudy: React.FC = () => {
   // 完成测试 - 兼容原来的调用方式
   const finishTest = async () => {
     // 使用当前的测试结果完成测试
-    await finishTestWithResults([...pendingAnswers], [...testResults]);
+    await finishTestWithResults([...pendingAnswers]);
   };
 
   // 重新开始测试
@@ -670,7 +615,6 @@ const VocabularyStudy: React.FC = () => {
     setUserAnswer('');
     setShowAnswer(false);
     setTestResults([]);
-    setAnswerFeedback(null);
     setPendingAnswers([]);
     setOptions([]);
     answerSubmittingRef.current = false;
@@ -1271,24 +1215,18 @@ const VocabularyStudy: React.FC = () => {
                   {showAnswer && (
                     <div style={{ 
                       padding: 15, 
-                      backgroundColor: answerFeedback?.isCorrect ? '#f6ffed' : '#fff2f0', 
+                      backgroundColor: '#f6f8fa', 
                       borderRadius: 4, 
                       marginBottom: 15,
-                      border: `1px solid ${answerFeedback?.isCorrect ? '#b7eb8f' : '#ffccc7'}`
+                      border: '1px solid #d9d9d9'
                     }}>
                       <div style={{ 
                         fontWeight: 'bold', 
-                        color: answerFeedback?.isCorrect ? '#389e0d' : '#cf1322',
+                        color: '#1677ff',
                         marginBottom: 5
                       }}>
-                        {answerFeedback?.isCorrect ? '回答正确' : '回答错误'}
+                        本题已提交
                       </div>
-                      {answerFeedback && (
-                        <>
-                          <div>正确答案: {answerFeedback.correctAnswer}</div>
-                          <div>你的答案: {answerFeedback.userAnswer || '（空）'}</div>
-                        </>
-                      )}
                       <div>正在进入下一题...</div>
                     </div>
                   )}