feat(家庭): 添加家庭列表可添加字段并优化按钮显示逻辑

添加返回字段 can_add 以控制是否显示创建家庭按钮
移除基于年龄的按钮显示逻辑，改为使用 can_add 字段

 /*
  * @Date: 2024-01-01 00:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-22 15:35:23
+ * @LastEditTime: 2025-09-23 09:37:24
  * @FilePath: /lls_program/src/api/family.js
  * @Description: 家庭相关接口
  */
@@ -43,6 +43,7 @@ export const searchFamilyByPassphraseAPI = (params) => fn(fetch.get(Api.SEARCH_B
  * @returns {string} response.code - 响应状态码
  * @returns {string} response.msg - 响应消息
  * @returns {Array} response.data.families - 家庭列表
+ * @returns {boolean} response.data.can_add - 是否可以添加家庭
  * @returns {number} response.data.families[].id - 家庭ID
  * @returns {string} response.data.families[].name - 家庭名称
  * @returns {string} response.data.families[].avatar_url - 家庭头像

 <!--
  * @Date: 2022-09-19 14:11:06
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-20 22:26:29
+ * @LastEditTime: 2025-09-23 09:45:30
  * @FilePath: /lls_program/src/pages/MyFamily/index.vue
  * @Description: 我的家庭页面 - 展示用户加入的家庭列表
 -->
@@ -114,9 +114,9 @@
     </view>
 
     <!-- 底部固定按钮 -->
-    <view v-if="isShowBtn" class="fixed bottom-0 left-0 right-0 bg-white border-t border-gray-100 p-4 z-10">
-      <!-- 双按钮布局：大于60岁且未创建过家庭 -->
-      <view v-if="showDoubleButtons" class="flex gap-3">
+    <view v-if="familyList.length > 0" class="fixed bottom-0 left-0 right-0 bg-white border-t border-gray-100 p-4 z-10">
+      <!-- 双按钮布局：可以创建家庭时 -->
+      <view v-if="canAddFamily" class="flex gap-3">
         <view
           @tap="createNewFamily"
           class="flex-1 bg-green-500 text-white text-center py-3 rounded-lg font-medium text-sm"
@@ -131,7 +131,7 @@
         </view>
       </view>
 
-      <!-- 单按钮布局：其他情况 -->
+      <!-- 单按钮布局：只能加入家庭时 -->
       <view
         v-else
         @tap="joinNewFamily"
@@ -242,7 +242,6 @@ import { Home, Check } from '@nutui/icons-vue-taro';
 import './index.less';
 // 获取接口信息
 import { getMyFamiliesAPI, switchCurrentFamilyAPI, deleteFamilyMemberAPI } from '@/api/family';
-import { getUserProfileAPI } from '@/api/user';
 //
 const defaultFamilyCoverSvg = 'https://cdn.ipadbiz.cn/lls_prog/images/default-family-cover.png';
 // 默认头像
@@ -251,8 +250,6 @@ const defaultAvatar = 'https://cdn.ipadbiz.cn/mlaj/images/icon_1.jpeg'
 
 // 响应式数据
 const familyList = ref([]);
-const userProfile = ref(null); // 用户资料信息
-const isOver60 = ref(false); // 是否大于60岁
 
 // 成员管理相关数据
 const showMemberPopup = ref(false);
@@ -261,61 +258,19 @@ const selectedMembers = ref([]);
 const currentMembers = ref([]);
 
 /**
- * 计算年龄
- * @param {string} birthDate - 生日日期字符串
- * @returns {number} 年龄
- */
-const calculateAge = (birthDate) => {
-  if (!birthDate) return 0;
-
-  const birth = new Date(birthDate);
-  const today = new Date();
-  let age = today.getFullYear() - birth.getFullYear();
-  const monthDiff = today.getMonth() - birth.getMonth();
-
-  if (monthDiff < 0 || (monthDiff === 0 && today.getDate() < birth.getDate())) {
-    age--;
-  }
-
-  return age;
-};
-
-/**
  * 初始化页面数据
  */
+const canAddFamily = ref(false);
+
 const initPageData = async () => {
   // 获取家庭列表
   const { code, data } = await getMyFamiliesAPI();
   if (code) {
     familyList.value = data?.families || [];
-    console.warn(data);
-  }
-
-  // 获取用户资料
-  const userRes = await getUserProfileAPI();
-  if (userRes.code && userRes.data?.user) {
-    userProfile.value = userRes.data.user;
-    const age = calculateAge(userRes.data.user.birth_date);
-    isOver60.value = age > 60;
-    console.log('用户年龄:', age, '是否大于60岁:', isOver60.value);
+    canAddFamily.value = data?.can_add || false;
   }
 };
 
-// 如果家庭列表存在时, 才显示加入新家庭的按钮
-const isShowBtn = computed(() => {
-  return familyList.value.length > 0;
-});
-
-// 判断用户是否创建过家庭
-const hasCreatedFamily = computed(() => {
-  return familyList.value.some(family => family.is_my);
-});
-
-// 判断是否显示双按钮（创建家庭 + 加入家庭）
-const showDoubleButtons = computed(() => {
-  return isOver60.value && !hasCreatedFamily.value;
-});
-
 /**
  * 切换到指定家庭
  * @param {number} familyId - 家庭ID