feat: 新增碎片更新和会话查询的Controller端点

- PUT /report-fragments/{id} 更新碎片内容
- GET /report-fragments/session/{sessionNum} 获取指定会话的完整碎片列表

src/main/java/com/guo/learningprogresstracker/controller/reportFragmentsController.java

@@ -1,16 +1,17 @@
 package com.guo.learningprogresstracker.controller;
 
 import com.guo.learningprogresstracker.dto.request.CreateFragmentsRequest;
+import com.guo.learningprogresstracker.dto.request.UpdateFragmentsRequest;
 import com.guo.learningprogresstracker.entity.CommonResult;
+import com.guo.learningprogresstracker.entity.StudyReportFragmentsEntity;
 import com.guo.learningprogresstracker.exception.NotFindEntitiesException;
 import com.guo.learningprogresstracker.service.impl.StudyReportFragmentsServiceImpl;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.validation.annotation.Validated;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
 
 /**
  * 学习残片控制层
@@ -24,12 +25,29 @@ public class reportFragmentsController {
 
     /**
      * 创建学习残片
-     * @param request
-     * @return
      */
     @PostMapping
     public CommonResult<Void> createFragments(@Valid @RequestBody CreateFragmentsRequest request) throws NotFindEntitiesException {
         studyReportFragmentsServiceImpl.createFragments(request);
         return CommonResult.success();
     }
+
+    /**
+     * 更新学习残片
+     */
+    @PutMapping("/{id}")
+    public CommonResult<Void> updateFragments(@PathVariable Integer id,
+                                              @Valid @RequestBody UpdateFragmentsRequest request) throws NotFindEntitiesException {
+        studyReportFragmentsServiceImpl.updateFragments(id, request);
+        return CommonResult.success();
+    }
+
+    /**
+     * 获取指定会话的所有学习残片
+     */
+    @GetMapping("/session/{sessionNum}")
+    public CommonResult<List<StudyReportFragmentsEntity>> getFragmentsBySession(@PathVariable String sessionNum) {
+        List<StudyReportFragmentsEntity> fragments = studyReportFragmentsServiceImpl.getFragmentsBySession(sessionNum);
+        return CommonResult.success(fragments);
+    }
 }