整个课程和数据UI重新设计版本

kouyu_english/lib/features/assessment/assessment_page.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 
 import '../../core/app_state.dart';
 import '../../core/app_theme.dart';
-import '../../core/assessment_bank.dart';
+import '../../core/courses/courses.dart';
 import '../../core/models.dart';
 import '../../core/voice_service.dart';
 import '../../widgets/app_widgets.dart';
@@ -221,7 +221,7 @@ class _AssessmentPageState extends State<AssessmentPage>
     results[task.id] = correct;
     widget.state.recordAssessmentAttempt(
       taskId: task.id,
-      skill: _skillLabel(task.skill),
+      skill: task.skill.label,
       correct: correct,
       rawAnswer: answer == null ? controller.text.trim() : task.choices[answer],
       spoken: task.skill == AssessmentSkill.speaking,
@@ -254,7 +254,7 @@ class _AssessmentPageState extends State<AssessmentPage>
         results[speaking.id] = false;
         widget.state.recordAssessmentPending(
           taskId: speaking.id,
-          skill: _skillLabel(AssessmentSkill.speaking),
+          skill: AssessmentSkill.speaking.label,
           reason: '设备麦克风或语音识别不可用，等待补测。',
         );
       }
@@ -327,13 +327,20 @@ class _AssessmentPageState extends State<AssessmentPage>
                 SectionCard(
                   tint: AppColors.warm,
                   child: Text(
-                    '待评估：${record.pendingSkills.map(_skillLabel).join('、')}。技术问题不会计为语言错误。',
+                    '待评估：${record.pendingSkills.map((skill) => skill.label).join('、')}。技术问题不会计为语言错误。',
                   ),
                 ),
               if (record.failedSkills.isNotEmpty) const Text('建议补练：'),
               for (final skill in record.failedSkills)
                 SectionCard(child: Text(_remediation(skill))),
             ],
+            if (_wrongTasks.isNotEmpty) ...[
+              const Text(
+                '错题回顾',
+                style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600),
+              ),
+              for (final wrong in _wrongTasks) _WrongAnswerCard(wrong: wrong),
+            ],
             if (!record.passed && replacementFor(widget.pack.id) != null)
               SecondaryButton(
                 label: '开始替换题补测',
@@ -359,7 +366,7 @@ class _AssessmentPageState extends State<AssessmentPage>
       child: SpacedColumn(
         children: [
           Text(
-            _skillLabel(task.skill),
+            task.skill.label,
             style: Theme.of(context).textTheme.headlineMedium,
           ),
           const Text('评估中不提供翻译、句框或答案。需要帮助请退出后先做补练。'),
@@ -435,16 +442,50 @@ class _AssessmentPageState extends State<AssessmentPage>
     );
   }
 
+  /// Tasks answered wrong in this attempt, with the learner's latest answer.
+  List<({AssessmentTask task, String answer})> get _wrongTasks => [
+    for (final task in widget.pack.tasks)
+      if (results[task.id] == false)
+        if (widget.state.attemptEvidence.reversed
+                .where((item) => item.taskId == task.id)
+                .firstOrNull
+            case final evidence? when evidence.outcome != EvidenceKind.pending)
+          (task: task, answer: evidence.rawAnswer ?? ''),
+  ];
+
   String _remediation(AssessmentSkill skill) => switch (skill) {
     AssessmentSkill.listening => '听力：回到数字、星期/时间和场景听辨复习；下一次会使用不同音频。',
     AssessmentSkill.speaking => '口语：练姓名、号码、物品、家人、星期、整点和请求重复；确认未编辑转写后再补测。',
     AssessmentSkill.reading => '阅读：复习人物、地点、数字和时间信息定位，再阅读不同短对话。',
     AssessmentSkill.writing => '写作：分别练完整的姓名、地点、喜好、物品、星期/时间句，不使用句框。',
   };
-  String _skillLabel(AssessmentSkill skill) => switch (skill) {
-    AssessmentSkill.listening => '听力',
-    AssessmentSkill.speaking => '口语',
-    AssessmentSkill.reading => '阅读',
-    AssessmentSkill.writing => '写作',
-  };
+}
+
+class _WrongAnswerCard extends StatelessWidget {
+  const _WrongAnswerCard({required this.wrong});
+  final ({AssessmentTask task, String answer}) wrong;
+
+  @override
+  Widget build(BuildContext context) {
+    final task = wrong.task;
+    return SectionCard(
+      child: SpacedColumn(
+        spacing: 6,
+        children: [
+          Text(
+            '${task.skill.label} · ${task.audio ?? task.prompt}',
+            style: const TextStyle(fontWeight: FontWeight.w600),
+          ),
+          Text(
+            '你的答案：${wrong.answer.isEmpty ? '（未作答）' : wrong.answer}',
+            style: TextStyle(color: AppColors.warmInk),
+          ),
+          Text(
+            assessmentAnswerGuide(task, wrong.answer),
+            style: TextStyle(color: AppColors.green),
+          ),
+        ],
+      ),
+    );
+  }
 }