docs: 주석 수정 및 import 클래스명 수정

Author: KSH0326

src/main/java/com/back/domain/study/record/controller/StudyRecordController.java

@@ -20,7 +20,7 @@
 @RestController
 @RequiredArgsConstructor
 @RequestMapping("/api/plans/records")
-@Tag(name = "StudyPlan", description = "학습 계획 관련 API")
+@Tag(name = "StudyRecord", description = "학습 조회 관련 API")
 public class StudyRecordController {
     private final StudyRecordService studyRecordService;
 
@@ -40,6 +40,8 @@ public ResponseEntity<RsData<StudyRecordResponseDto>> createStudyRecord(
     // ======================= 조회 ======================
     // 일별 학습 기록 조회
     @GetMapping
+    @Operation( summary = "학습 기록 조회",
+            description = "날짜별 기록을 조회합니다.")
     public ResponseEntity<RsData<List<StudyRecordResponseDto>>> getDailyStudyRecord(
             @AuthenticationPrincipal CustomUserDetails user,
             @RequestParam("date") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate date

src/main/java/com/back/domain/study/record/service/StudyRecordService.java

@@ -197,15 +197,15 @@ private List<StudyPlan> getTodayStudyPlans(Long userId, LocalDate date) {
 
     // ===================== 유틸 =====================
     // 시간 범위 검증
-    private void validateTimeRange(java.time.LocalDateTime startTime, java.time.LocalDateTime endTime) {
+    private void validateTimeRange(LocalDateTime startTime, LocalDateTime endTime) {
         if (startTime.isAfter(endTime) || startTime.isEqual(endTime)) {
             throw new CustomException(ErrorCode.INVALID_TIME_RANGE);
         }
     }
 
     // 일시정지 시간이 학습 시간 내에 있는지 검증
-    private void validatePauseInStudyRange(java.time.LocalDateTime studyStart, java.time.LocalDateTime studyEnd,
-                                           java.time.LocalDateTime pauseStart, java.time.LocalDateTime pauseEnd) {
+    private void validatePauseInStudyRange(LocalDateTime studyStart, LocalDateTime studyEnd,
+                                           LocalDateTime pauseStart, LocalDateTime pauseEnd) {
         if (pauseStart.isBefore(studyStart) || pauseEnd.isAfter(studyEnd)) {
             throw new CustomException(ErrorCode.INVALID_TIME_RANGE);
         }