feat: 添加得分占比计算功能；优化时间格式化工具函数；更新考试记录和用户任务页面以显示得分占比；新增得分占比测试用例；修复时间解析逻辑

api/models/examTask.ts

@@ -46,6 +46,7 @@ export interface TaskReport {
     userName: string;
     userPhone: string;
     score: number | null;
+    scorePercentage: number | null;
     completedAt: string | null;
   }>;
 }
@@ -81,16 +82,16 @@ export class ExamTaskModel {
         : 0;
 
     const passingUsers = report.details.filter((d) => {
-      if (d.score === null) return false;
-      return d.score / input.totalScore >= 0.6;
+      if (d.scorePercentage === null) return false;
+      return d.scorePercentage >= 60;
     }).length;
 
     const passRate =
       report.totalUsers > 0 ? Math.round((passingUsers / report.totalUsers) * 100) : 0;
 
     const excellentUsers = report.details.filter((d) => {
-      if (d.score === null) return false;
-      return d.score / input.totalScore >= 0.8;
+      if (d.scorePercentage === null) return false;
+      return d.scorePercentage >= 80;
     }).length;
 
     const excellentRate =
@@ -142,20 +143,20 @@ export class ExamTaskModel {
       // 获取该任务的详细报表数据
       const report = await this.getReport(task.id);
       
-      // 计算合格率（得分率60%以上）
+      // 计算合格率（得分占比60%以上）
       const passingUsers = report.details.filter((d: any) => {
-        if (d.score === null) return false;
-        return (d.score / task.totalScore) >= 0.6;
+        if (d.scorePercentage === null) return false;
+        return d.scorePercentage >= 60;
       }).length;
       
       const passRate = report.totalUsers > 0 
         ? Math.round((passingUsers / report.totalUsers) * 100) 
         : 0;
       
-      // 计算优秀率（得分率80%以上）
+      // 计算优秀率（得分占比80%以上）
       const excellentUsers = report.details.filter((d: any) => {
-        if (d.score === null) return false;
-        return (d.score / task.totalScore) >= 0.8;
+        if (d.scorePercentage === null) return false;
+        return d.scorePercentage >= 80;
       }).length;
       
       const excellentRate = report.totalUsers > 0 
@@ -198,20 +199,20 @@ export class ExamTaskModel {
         ? Math.round((report.completedUsers / report.totalUsers) * 100) 
         : 0;
       
-      // 4. 计算合格率（得分率60%以上）
+      // 4. 计算合格率（得分占比60%以上）
       const passingUsers = report.details.filter(d => {
-        if (d.score === null) return false;
-        return (d.score / task.totalScore) >= 0.6;
+        if (d.scorePercentage === null) return false;
+        return d.scorePercentage >= 60;
       }).length;
       
       const passRate = report.totalUsers > 0 
         ? Math.round((passingUsers / report.totalUsers) * 100) 
         : 0;
       
-      // 5. 计算优秀率（得分率80%以上）
+      // 5. 计算优秀率（得分占比80%以上）
       const excellentUsers = report.details.filter(d => {
-        if (d.score === null) return false;
-        return (d.score / task.totalScore) >= 0.8;
+        if (d.scorePercentage === null) return false;
+        return d.scorePercentage >= 80;
       }).length;
       
       const excellentRate = report.totalUsers > 0 
@@ -509,16 +510,39 @@ export class ExamTaskModel {
     const subject = await import('./examSubject').then(({ ExamSubjectModel }) => ExamSubjectModel.findById(task.subjectId));
     if (!subject) throw new Error('科目不存在');
 
+    // 注意：同一用户可能多次参加同一任务考试，这里取“得分占比最高，其次完成时间最新”的那一次。
+    // 得分占比优先用 quiz_answers/题目分值重算（兼容旧记录），否则回退到 quiz_records.score_percentage。
     const sqlUsers = `
+      WITH best_records AS (
+        SELECT
+          r.*, 
+          ROW_NUMBER() OVER (
+            PARTITION BY r.user_id, r.task_id
+            ORDER BY COALESCE(r.score_percentage, -1) DESC, r.created_at DESC
+          ) as rn
+        FROM quiz_records r
+        WHERE r.task_id = ?
+      ),
+      totals AS (
+        SELECT qa.record_id as recordId, SUM(q.score) as totalPossibleScore
+        FROM quiz_answers qa
+        JOIN questions q ON q.id = qa.question_id
+        GROUP BY qa.record_id
+      )
       SELECT 
         u.id as userId,
         u.name as userName,
         u.phone as userPhone,
-        qr.total_score as score,
-        qr.created_at as completedAt
+        br.total_score as score,
+        br.created_at as completedAt,
+        CASE
+          WHEN totals.totalPossibleScore > 0 THEN (br.total_score * 1.0 / totals.totalPossibleScore) * 100
+          ELSE br.score_percentage
+        END as scorePercentage
       FROM exam_task_users etu
       JOIN users u ON etu.user_id = u.id
-      LEFT JOIN quiz_records qr ON u.id = qr.user_id AND qr.task_id = ?
+      LEFT JOIN best_records br ON br.user_id = u.id AND br.rn = 1
+      LEFT JOIN totals ON totals.recordId = br.id
       WHERE etu.task_id = ?
     `;
 
@@ -529,6 +553,7 @@ export class ExamTaskModel {
       userName: r.userName,
       userPhone: r.userPhone,
       score: r.score !== null ? r.score : null,
+      scorePercentage: r.scorePercentage !== null ? Number(r.scorePercentage) : null,
       completedAt: r.completedAt || null
     }));