fix: AI评分后教师端成绩列表延迟~24小时才更新——重评claim的快照BINARY长文本比对失效导致重评被静默跳过，移除该条件（快照变化已在Java侧判断）；AI评分落库后异步重建本教学班stu_rank当日快照

src/main/java/com/sztzjy/linkCommerce/service/impl/AiTrainingEvaluationServiceImpl.java

@@ -20,6 +20,7 @@ import com.sztzjy.linkCommerce.mapper.TeachingClassStudentMapper;
 import com.sztzjy.linkCommerce.mapper.TrainingTaskMapper;
 import com.sztzjy.linkCommerce.mapper.TrainingTaskClassConfigMapper;
 import com.sztzjy.linkCommerce.service.AiTrainingEvaluationService;
+import com.sztzjy.linkCommerce.service.ScoreRankService;
 import com.sztzjy.linkCommerce.service.TrainingKnowledgeService;
 import com.sztzjy.linkCommerce.training.knowledge.EffectiveTrainingTaskContent;
 import lombok.extern.slf4j.Slf4j;
@@ -35,6 +36,7 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 
 @Slf4j
 @Service
@@ -63,6 +65,8 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
     public StudentTrainingAnswerMapper studentTrainingAnswerMapper;
     @Autowired
     public TeachingClassStudentMapper teachingClassStudentMapper;
+    @Autowired
+    public ScoreRankService scoreRankService;
     @Autowired(required = false)
     public TrainingTaskClassConfigMapper trainingTaskClassConfigMapper;
     @Autowired(required = false)
@@ -129,6 +133,7 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         EvaluationContext context = resolveContext(taskKey, user, true);
         AiTrainingEvaluation evaluation = getOrCreate(context, user);
         if (PROCESSING.equals(evaluation.getAssessmentStatus()) && !isProcessingTimedOut(evaluation)) {
+            log.info("AI assessment still processing, evaluationId={}", evaluation.getId());
             return toView(evaluation);
         }
         String answerSnapshot = answerSnapshot(context.answer);
@@ -145,6 +150,8 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
                 ? aiTrainingEvaluationMapper.claimReassessment(evaluation.getId(), evaluation.getAssessmentAnswerSnapshot(), new Date())
                 : aiTrainingEvaluationMapper.claimAssessment(evaluation.getId(), new Date());
         if (claimed != 1) {
+            log.info("AI assessment claim skipped, evaluationId={}, reassessment={}, claimed={}",
+                    evaluation.getId(), reassessment, claimed);
             return currentView(context, user);
         }
 
@@ -171,6 +178,9 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
             completed.setAssessmentCompletedAt(completedAt);
             completed.setUpdateTime(completedAt);
             completeAssessmentAndWriteScore(completed, context.answer.getId(), score, completedAt);
+            // 教师端成绩列表读的是 stu_rank 每日快照（凌晨1点定时重建），
+            // 不在这里立即刷新本班快照，新 AI 分数要等次日才会出现在教师端。
+            refreshScoreRankAfterAssessment(user, context.teachingClassId);
             completed.setHelpStatus(evaluation.getHelpStatus());
             completed.setAssessmentStatus(SUCCEEDED);
             return toView(completed);
@@ -215,6 +225,26 @@ public class AiTrainingEvaluationServiceImpl implements AiTrainingEvaluationServ
         });
     }
 
+    /**
+     * AI 分数落库后立即重建本教学班的 stu_rank 当日快照（与每日凌晨定时重建同一套逻辑），
+     * 教师端成绩列表马上能看到新分数。异步执行且失败只记日志：排名刷新失败不能影响评分结果。
+     */
+    private void refreshScoreRankAfterAssessment(JwtUser user, String teachingClassId) {
+        String schoolId = user == null ? null : user.getSchoolId();
+        if (scoreRankService == null || StringUtils.isAnyBlank(schoolId, teachingClassId)) {
+            return;
+        }
+        CompletableFuture.runAsync(() -> {
+            try {
+                if (!scoreRankService.doRankTeachingClass(schoolId, teachingClassId)) {
+                    scoreRankService.doRankOne(schoolId);
+                }
+            } catch (RuntimeException e) {
+                log.warn("AI assessment score rank refresh failed, teachingClassId={}", teachingClassId, e);
+            }
+        });
+    }
+
     private AiTrainingEvaluation getOrCreate(EvaluationContext context, JwtUser user) {
         AiTrainingEvaluation evaluation = aiTrainingEvaluationMapper.findByStudentClassAndTask(
                 user.getUserId(), context.teachingClassId, context.task.getId());

src/main/resources/mappers/AiTrainingEvaluationMapper.xml

@@ -78,7 +78,6 @@
     SET assessment_status = 'PROCESSING', assessment_error_message = NULL, update_time = #{updateTime,jdbcType=TIMESTAMP}
     WHERE id = #{id,jdbcType=VARCHAR}
       AND assessment_status = 'SUCCEEDED'
-      AND (BINARY assessment_answer_snapshot <=> BINARY #{expectedAnswerSnapshot,jdbcType=LONGVARCHAR})
   </update>
 
   <update id="completeHelp" parameterType="com.sztzjy.linkCommerce.entity.AiTrainingEvaluation">