fix(bugcollect): getIssueDetail 补全 events 列表，修复 Web 控制台事件列表为空

toIssueResponse 中 events 始终传 null，导致 GET /issues/{id} 返回的 events 字段为空。
getIssueDetail 现在主动查询最近 20 条 IssueEvent 并填充到响应中。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

xuqm-bugcollect-service/src/main/java/com/xuqm/bugcollect/service/LogService.java

@@ -187,7 +187,21 @@ public class LogService {
     public IssueResponse getIssueDetail(Long id) {
         LogIssueEntity issue = issueRepository.findById(id)
                 .orElseThrow(() -> new IllegalArgumentException("Issue not found: " + id));
-        return toIssueResponse(issue);
+        Pageable pageable = PageRequest.of(0, 20, Sort.by(Sort.Direction.DESC, "createdAt"));
+        List<IssueEventResponse> events = issueEventRepository
+                .findByIssueIdOrderByCreatedAtDesc(issue.getId(), pageable)
+                .getContent()
+                .stream()
+                .map(this::toIssueEventResponse)
+                .toList();
+        return new IssueResponse(
+                issue.getId(), issue.getAppKey(), issue.getFingerprint(),
+                issue.getLevel(),
+                issue.getStatus() != null ? issue.getStatus() : (issue.isResolved() ? "resolved" : "open"),
+                issue.getTitle(), issue.getFirstSeenAt(), issue.getLastSeenAt(),
+                issue.getCount(), issue.getAffectedUsers(), issue.isResolved(),
+                issue.getAssignee(), issue.getPlatform(), issue.getRelease(), events
+        );
     }
 
     @Transactional(readOnly = true)