feat: 20260809 系统优化 - 全部28项问题修复(P0×6+P1×16+P2×6)

P0: 福利批量参保/离职证明下载防乱码/考勤模板合并Sheet/补卡修改/附件在线查看删除
P1: 分页pageSize修复/离职导出筛选/撤回删除草稿/加班费自动计算/考勤加班汇总/证据链异常详情/制度催办/模板导入Word/社保封顶保底/校验字段提示/职务字段/社保费用明细/弹窗防误关/身份证查重/证明员工下拉/培训批量
P2: 离职流程去重/社保基数覆盖输入/薪税入口改名/添加员工引导/绩效模板清理

frontend/src/pages/Templates.tsx

@@ -1,13 +1,14 @@
-import { useState } from 'react'
+import { useState, useRef } from 'react'
 import { usePageSize } from '../hooks/usePageSize'
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
-import { FileText, Copy, X, Download, BookOpen, HelpCircle, Plus, Edit, Trash2, Building2 } from 'lucide-react'
+import { FileText, Copy, X, Download, BookOpen, HelpCircle, Plus, Edit, Trash2, Building2, Upload } from 'lucide-react'
 import { toast } from 'sonner'
 import { templatesApi } from '../lib/api-services'
 import { useAuthStore } from '../store/authStore'
 import Card from '../components/ui/Card'
 import Button from '../components/ui/Button'
 import { Input, Label, Select } from '../components/ui/Input'
+import mammoth from 'mammoth'
 import Modal from '../components/ui/Modal'
 import EmptyState from '../components/ui/EmptyState'
 import Pagination from '../components/ui/Pagination'
@@ -303,6 +304,7 @@ function SystemTemplates() {
 function EnterpriseTemplates() {
   const queryClient = useQueryClient()
   const confirm = useConfirm()
+  const fileInputRef = useRef<HTMLInputElement>(null)
   const [category, setCategory] = useState<string>('')
   const pageSize = usePageSize()
   const [page, setPage] = useState(1)
@@ -490,6 +492,31 @@ function EnterpriseTemplates() {
           </div>
           <div>
             <Label>模板内容</Label>
+            <div className="flex items-center gap-2 mb-1">
+              <Button size="sm" variant="secondary" className="!h-7" onClick={() => fileInputRef.current?.click()}>
+                <Upload className="w-3.5 h-3.5 mr-1" />导入 Word 文档
+              </Button>
+              <input
+                ref={fileInputRef}
+                type="file"
+                accept=".docx"
+                className="hidden"
+                onChange={async (e) => {
+                  const file = e.target.files?.[0]
+                  if (!file) return
+                  try {
+                    const arrayBuffer = await file.arrayBuffer()
+                    const result = await mammoth.convertToHtml({ arrayBuffer })
+                    setForm({ ...form, content: result.value })
+                    toast.success('文档导入成功')
+                  } catch {
+                    toast.error('文档解析失败，请确保为 .docx 格式')
+                  }
+                  e.target.value = ''
+                }}
+              />
+              <span className="text-xs text-gray-400">支持 .docx 格式，导入后转为 HTML</span>
+            </div>
             <textarea
               className="w-full px-3 py-2 rounded-md border border-gray-300 focus:outline-none focus:ring-2 focus:ring-primary text-sm min-h-[200px] font-mono"
               value={form.content}