fix: 审计日志补充关键操作详情，前端改为可读格式显示

frontend/src/pages/AuditLog.tsx

@@ -63,6 +63,57 @@ const ENTITY_LABELS: Record<string, string> = {
   NotificationSetting: '通知设置',
 }
 
+/** 审计日志 detail 字段中文标签映射 */
+const DETAIL_LABELS: Record<string, string> = {
+  employeeName: '员工',
+  department: '部门',
+  name: '姓名',
+  reason: '原因',
+  type: '类型',
+  terminationDate: '离职日期',
+  compensation: '补偿金',
+  contractType: '合同类型',
+  startDate: '开始日期',
+  endDate: '结束日期',
+  employeeId: '员工ID',
+  count: '数量',
+  years: '续签年限',
+  hireDate: '入职日期',
+  oldSalary: '原薪资',
+  newSalary: '新薪资',
+  oldDepartment: '原部门',
+  newDepartment: '新部门',
+  comment: '备注',
+  resignationReason: '离职原因',
+  batch: '批量',
+  violationType: '违纪类型',
+  severity: '严重程度',
+  action: '处理措施',
+  topic: '培训主题',
+  trainer: '培训师',
+  duration: '时长',
+  period: '考核周期',
+  score: '得分',
+  grade: '等级',
+  reviewer: '考评人',
+}
+
+/** 将 detail 对象格式化为可读字符串 */
+function formatDetail(detail: any): string {
+  if (!detail || typeof detail !== 'object') return ''
+  const entries = Object.entries(detail).filter(([, v]) => v !== '' && v !== null && v !== undefined)
+  if (entries.length === 0) return ''
+  return entries.map(([k, v]) => {
+    const label = DETAIL_LABELS[k] || k
+    let val = String(v)
+    if (k === 'compensation' && val && val !== '0') val = `¥${val}`
+    if (k === 'startDate' || k === 'endDate' || k === 'terminationDate' || k === 'hireDate') {
+      val = String(v).slice(0, 10)
+    }
+    return `${label}: ${val}`
+  }).join(' | ')
+}
+
 /**
  * 系统操作日志页面
  */
@@ -168,11 +219,11 @@ export default function AuditLog() {
                       <span className="text-sm font-medium">{ACTION_LABELS[log.action] || log.action}</span>
                       <span className="px-1.5 py-0.5 rounded text-xs bg-gray-100 text-gray-600">{ENTITY_LABELS[log.entity] || log.entity}</span>
                     </div>
-                    {log.detail && (
+                    {log.detail && (() => { const formatted = formatDetail(log.detail); return formatted ? (
                       <div className="text-xs text-gray-500 mt-0.5 truncate">
-                        {typeof log.detail === 'object' ? JSON.stringify(log.detail).slice(0, 100) : String(log.detail).slice(0, 100)}
+                        {formatted}
                       </div>
-                    )}
+                    ) : null; })()}
                   </div>
                   <div className="text-xs text-gray-400 flex-shrink-0 text-right">
                     <div>{new Date(log.createdAt).toLocaleString('zh-CN', { month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' })}</div>