feat: add queue description column to events page

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/pages/Events.tsx

@@ -49,8 +49,18 @@ function EventsPage() {
     qc.invalidateQueries({ queryKey: ['events'] })
   }
 
+  const queueDesc: Record<string, string> = {
+    'ai-analysis': 'AI 分析任务（主动回忆诊断、费曼评估）',
+    'document-import': '文档导入任务（文件解析、分块、向量化）',
+    'notification': '通知推送任务（站内消息、Push 推送）',
+    'domain-events': '领域事件分发（跨模块事件异步处理）',
+    'audit-logs': '审计日志写入（管理员操作记录）',
+    'file-cleanup': '文件清理任务（COS 过期文件删除、软删除清理）',
+  }
+
   const overviewColumns = [
-    { title: '队列', dataIndex: 'name', width: 160 },
+    { title: '队列', dataIndex: 'name', width: 150, render: (n: string) => <Text code>{n}</Text> },
+    { title: '说明', dataIndex: 'name', width: 300, render: (n: string) => <Text type="secondary">{queueDesc[n] || '—'}</Text> },
     { title: '总计', dataIndex: 'total', width: 60, align: 'center' as const },
     { title: '等待', dataIndex: 'waiting', width: 60, align: 'center' as const, render: (v: number) => <Badge count={v} showZero color="blue" /> },
     { title: '进行中', dataIndex: 'active', width: 70, align: 'center' as const, render: (v: number) => <Badge count={v} showZero color="processing" /> },