feat(ui): SVG图标全替换 + Neo-Brutalist主题升级 + 数据导出卡片类别勾选

client/src/pages/admin/Users.tsx

@@ -7,6 +7,7 @@ import Modal from '../../components/Modal';
 import { groupsApi, usersApi, errMsg } from '../../api';
 import { formatDateRange } from '../../utils/export';
 import type { UserItem, UserDetail, WorkGroup } from '../../types';
+import { IconUsers, IconPlus, IconEdit, IconTrash, IconEye } from '../../components/Icons';
 
 type Form = { class: string; name: string; volunteer_no: string; group_id: number | null };
 const emptyForm: Form = { class: '', name: '', volunteer_no: '', group_id: null };
@@ -67,14 +68,17 @@ export default function Users() {
 
   return (
     <div>
-      <div className="mb-5">
-        <h1 className="text-xl md:text-2xl font-black mb-1">👥 用户管理</h1>
-        <p className="text-sm text-gray-500">管理部员信息，查看个人累计义工时长与参与活动明细</p>
+      <div className="mb-5 flex items-start gap-2">
+        <IconUsers size={28} className="mt-0.5 shrink-0" />
+        <div>
+          <h1 className="text-xl md:text-2xl font-black mb-1">用户管理</h1>
+          <p className="text-sm text-gray-500">管理部员信息，查看个人累计义工时长与参与活动明细</p>
+        </div>
       </div>
 
       <div className="bg-white border-2 border-black p-4 mb-4 flex flex-col md:flex-row gap-3 md:items-center md:justify-between">
         <Input placeholder="搜索 姓名/班级/义工号/工作组..." value={keyword} onChange={(e) => setKeyword(e.target.value)} className="md:max-w-md" />
-        <Button onClick={openNew}>＋ 新增部员</Button>
+        <Button onClick={openNew}><span className="inline-flex items-center gap-2"><IconPlus size={18} />新增部员</span></Button>
       </div>
 
       <DataTable<UserItem>
@@ -87,9 +91,9 @@ export default function Users() {
           {
             key: 'op', title: '操作', width: '220px', render: (r) => (
               <div className="flex gap-1.5 flex-wrap">
-                <Button size="sm" variant="secondary" onClick={() => openDetail(r)}>详情</Button>
-                <Button size="sm" variant="secondary" onClick={() => openEdit(r)}>编辑</Button>
-                <Button size="sm" variant="danger" onClick={() => onDelete(r)}>删除</Button>
+                <Button size="sm" variant="secondary" onClick={() => openDetail(r)}><span className="inline-flex items-center gap-1.5"><IconEye size={14} />详情</span></Button>
+                <Button size="sm" variant="secondary" onClick={() => openEdit(r)}><span className="inline-flex items-center gap-1.5"><IconEdit size={14} />编辑</span></Button>
+                <Button size="sm" variant="danger" onClick={() => onDelete(r)}><span className="inline-flex items-center gap-1.5"><IconTrash size={14} />删除</span></Button>
               </div>
             )
           }