feat(review): 新增复习内容滚动展示与交互 API

- 新增 /review/feed 端点，合并报告和残片数据按时间倒序返回
- 新增 /review/report/{id} 和 /review/fragment/{id} 端点
- 支持复习内容在首页滚动展示及点击查看详情

src/main/java/com/guo/learningprogresstracker/service/ReviewService.java

@@ -0,0 +1,29 @@
+package com.guo.learningprogresstracker.service;
+
+import com.guo.learningprogresstracker.dto.ReviewFeedItem;
+import com.guo.learningprogresstracker.entity.StudyReportFragmentsEntity;
+import com.guo.learningprogresstracker.entity.StudyReportsEntity;
+import com.guo.learningprogresstracker.exception.NotFindEntitiesException;
+
+import java.util.List;
+
+/**
+ * 复习模块 Service 接口
+ */
+public interface ReviewService {
+
+    /**
+     * 获取复习 feed 列表，合并报告和残片按时间倒序
+     */
+    List<ReviewFeedItem> getReviewFeed(int limit);
+
+    /**
+     * 获取报告详情
+     */
+    StudyReportsEntity getReportDetail(int id) throws NotFindEntitiesException;
+
+    /**
+     * 获取残片详情
+     */
+    StudyReportFragmentsEntity getFragmentDetail(int id) throws NotFindEntitiesException;
+}