feat(familyForm): 新增家庭报名表单模块

添加家庭报名表单页面、路由、服务及模拟数据
- 创建表单页面，包含幼儿园班级选择、参赛人数、孩童姓名、手机号、证件登记和服装尺码等字段
- 添加路由配置，支持 /family-form 路径访问
- 实现服务层，提供获取学校选项和提交报名信息的功能
- 添加模拟数据，包含幼儿园列表和本地存储的报名记录

+const familyFormRoutes = [
+  {
+    path: '/family-form',
+    name: '家庭报名表单',
+    component: () => import('@/views/familyForm/index.vue'),
+    meta: {
+      title: '家庭表单录入'
+    },
+    children: []
+  }
+];
+
+export default familyFormRoutes;

+const STORAGE_KEY = 'family-form-registrations';
+
+const mockSchoolList = [
+  {
+    id: 'kg_001',
+    name: '上海市杨浦区科技幼儿园',
+    classes: [
+      { id: 'kg_001_c_001', name: '小一班' },
+      { id: 'kg_001_c_002', name: '中二班' },
+      { id: 'kg_001_c_003', name: '大三班' }
+    ]
+  },
+  {
+    id: 'kg_002',
+    name: '上海市黄浦区蓓蕾幼儿园',
+    classes: [
+      { id: 'kg_002_c_001', name: '小太阳班' },
+      { id: 'kg_002_c_002', name: '星星班' },
+      { id: 'kg_002_c_003', name: '彩虹班' }
+    ]
+  },
+  {
+    id: 'kg_003',
+    name: '上海市徐汇区童心幼儿园',
+    classes: [
+      { id: 'kg_003_c_001', name: '亲子一班' },
+      { id: 'kg_003_c_002', name: '亲子二班' },
+      { id: 'kg_003_c_003', name: '亲子三班' }
+    ]
+  }
+];
+
+const delay = (data, timeout = 200) => new Promise((resolve) => {
+  setTimeout(() => resolve(data), timeout);
+});
+
+const readRegistrations = () => {
+  try {
+    return JSON.parse(localStorage.getItem(STORAGE_KEY)) || [];
+  } catch (error) {
+    console.warn('读取家庭报名 mock 缓存失败', error);
+    return [];
+  }
+};
+
+const writeRegistrations = (list) => {
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(list));
+};
+
+export const getMockSchoolList = () => delay({
+  code: 1,
+  data: mockSchoolList
+});
+
+export const saveMockRegistration = (params) => {
+  const list = readRegistrations();
+  const now = Date.now();
+  const nextItem = {
+    ...params,
+    id: `family_${now}`,
+    updated_at: now
+  };
+
+  list.unshift(nextItem);
+  writeRegistrations(list);
+
+  return delay({
+    code: 1,
+    msg: '保存成功',
+    data: nextItem
+  }, 300);
+};

+import {
+  getMockSchoolList,
+  saveMockRegistration
+} from './mock';
+
+const normalizeSchoolList = (list = []) => list.map((school) => ({
+  text: school.name,
+  value: school.id,
+  children: (school.classes || []).map((item) => ({
+    text: item.name,
+    value: item.id
+  }))
+}));
+
+export const fetchSchoolOptions = async () => {
+  const res = await getMockSchoolList();
+  if (res.code !== 1) {
+    throw new Error(res.msg || '获取幼儿园信息失败');
+  }
+
+  return normalizeSchoolList(res.data);
+};
+
+export const submitRegistration = async (formData) => {
+  const res = await saveMockRegistration(formData);
+  if (res.code !== 1) {
+    throw new Error(res.msg || '保存报名信息失败');
+  }
+
+  return res.data;
+};