feat(复习)：标准思维导图生成与回忆对比

- 新增 review_standard_mind_maps / review_recall_records 数据表
- BuiltinMindMapGenerator：从报告/残片/应用场景规则生成标准导图
- MindMapAiClient 接口 + RemoteAiMindMapClient 预留
- StandardMindMapService：生成/编辑/重新生成/回忆对比
- 对比算法：标题归一化 + Bigram Jaccard 模糊匹配
- ReviewController 新增 6 个端点
- MindMapTreeTool / MindMapNode / CompareResult 工具类
- 完整单元测试（10 个，全部通过）
- 更新 docs/review-module-design.md

src/main/java/com/guo/learningprogresstracker/service/impl/ReviewServiceImpl.java

@@ -4,20 +4,15 @@ import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.guo.learningprogresstracker.dto.ReviewFeedItem;
 import com.guo.learningprogresstracker.dto.ReviewTaskStats;
-import com.guo.learningprogresstracker.dto.request.CreateReviewApplicationRequest;
-import com.guo.learningprogresstracker.dto.request.UpdateReviewApplicationRequest;
 import com.guo.learningprogresstracker.dto.request.UpsertReviewMindMapRequest;
-import com.guo.learningprogresstracker.entity.ReviewApplicationEntity;
 import com.guo.learningprogresstracker.entity.ReviewMindMapEntity;
 import com.guo.learningprogresstracker.entity.StudyReportFragmentsEntity;
 import com.guo.learningprogresstracker.entity.StudyReportsEntity;
 import com.guo.learningprogresstracker.entity.StudySessionsEntity;
 import com.guo.learningprogresstracker.entity.TaskEntity;
-import com.guo.learningprogresstracker.enums.ReviewApplicationStatusEnum;
 import com.guo.learningprogresstracker.enums.ReviewMindMapFileFormatEnum;
 import com.guo.learningprogresstracker.enums.ReviewMindMapParseStatusEnum;
 import com.guo.learningprogresstracker.exception.NotFindEntitiesException;
-import com.guo.learningprogresstracker.mapper.ReviewApplicationMapper;
 import com.guo.learningprogresstracker.mapper.ReviewMindMapMapper;
 import com.guo.learningprogresstracker.mapper.StudyReportFragmentsMapper;
 import com.guo.learningprogresstracker.mapper.StudyReportsMapper;
@@ -60,7 +55,6 @@ public class ReviewServiceImpl implements ReviewService {
     private final StudyReportFragmentsMapper studyReportFragmentsMapper;
     private final StudySessionsMapper studySessionsMapper;
     private final TasksMapper tasksMapper;
-    private final ReviewApplicationMapper reviewApplicationMapper;
     private final ReviewMindMapMapper reviewMindMapMapper;
     private final MindMapFileParser mindMapFileParser = new MindMapFileParser(new ObjectMapper());
 
@@ -158,48 +152,6 @@ public class ReviewServiceImpl implements ReviewService {
                 .orElseThrow(() -> new NotFindEntitiesException("学习残片[" + id + "]不存在"));
     }
 
-    @Override
-    public List<ReviewApplicationEntity> getApplications(String taskNum) throws NotFindEntitiesException {
-        ensureTaskExists(taskNum);
-        return reviewApplicationMapper.selectList(
-                Wrappers.<ReviewApplicationEntity>lambdaQuery()
-                        .eq(ReviewApplicationEntity::getTaskNum, taskNum)
-                        .orderByDesc(ReviewApplicationEntity::getLastModifiedTime)
-                        .orderByDesc(ReviewApplicationEntity::getCreatedTime));
-    }
-
-    @Override
-    public ReviewApplicationEntity createApplication(CreateReviewApplicationRequest request) throws NotFindEntitiesException {
-        ensureTaskExists(request.getTaskNum());
-        ReviewApplicationEntity entity = new ReviewApplicationEntity();
-        entity.setTaskNum(request.getTaskNum());
-        entity.setTitle(request.getTitle());
-        entity.setDescription(request.getDescription());
-        entity.setResourceUrl(request.getResourceUrl());
-        entity.setStatus(normalizeApplicationStatus(request.getStatus()));
-        reviewApplicationMapper.insert(entity);
-        return entity;
-    }
-
-    @Override
-    public ReviewApplicationEntity updateApplication(Integer id, UpdateReviewApplicationRequest request) throws NotFindEntitiesException {
-        ReviewApplicationEntity existing = Optional.ofNullable(reviewApplicationMapper.selectById(id))
-                .orElseThrow(() -> new NotFindEntitiesException("应用场景[" + id + "]不存在"));
-        existing.setTitle(request.getTitle());
-        existing.setDescription(request.getDescription());
-        existing.setResourceUrl(request.getResourceUrl());
-        existing.setStatus(normalizeApplicationStatus(request.getStatus()));
-        reviewApplicationMapper.updateById(existing);
-        return existing;
-    }
-
-    @Override
-    public void deleteApplication(Integer id) throws NotFindEntitiesException {
-        ReviewApplicationEntity existing = Optional.ofNullable(reviewApplicationMapper.selectById(id))
-                .orElseThrow(() -> new NotFindEntitiesException("应用场景[" + id + "]不存在"));
-        reviewApplicationMapper.deleteById(existing.getId());
-    }
-
     @Override
     public ReviewMindMapEntity getMindMap(String taskNum) throws NotFindEntitiesException {
         ensureTaskExists(taskNum);
@@ -381,10 +333,6 @@ public class ReviewServiceImpl implements ReviewService {
         }
     }
 
-    private String normalizeApplicationStatus(String status) {
-        return ReviewApplicationStatusEnum.fromCodeOrDefault(status).getCode();
-    }
-
     private String normalizeMindMapFormat(String contentFormat) {
         if (!StringUtils.hasText(contentFormat)) {
             return DEFAULT_MIND_MAP_FORMAT;