feat(family): 邀请他人改为微信转发分享（open-type=share + useShareAppMessage）

分享卡落到家庭详情页并携带 invite=1 标记，标题带家庭名

src/pages/family/detail.module.scss

@@ -74,6 +74,42 @@
   margin-top: 24px;
 }
 
+// 邀请行：与 ListRow 同款外观，但右侧为 open-type=share 的原生 Button（触发转发面板）
+.shareRow {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  min-height: 104px;
+  padding: 0 32px;
+  background: $color-bg-white;
+  border-bottom: 1px solid $color-border;
+}
+
+.shareLabel {
+  font-size: 30px;
+  color: $color-text;
+}
+
+// 清除小程序 Button 原生样式（边框/底色/行高），仅保留命中区
+.shareBtn {
+  margin: 0;
+  padding: 0;
+  width: auto;
+  min-width: 0;
+  background: transparent;
+  border: none;
+  line-height: inherit;
+
+  &::after {
+    border: none;
+  }
+}
+
+.shareArrow {
+  font-size: 36px;
+  color: $color-text-placeholder;
+}
+
 .sectionTitle {
   display: block;
   font-size: 26px;

src/pages/family/detail.tsx

@@ -1,6 +1,6 @@
 import { useState } from 'react'
-import { useRouter, useDidShow } from '@tarojs/taro'
-import { View, Text } from '@tarojs/components'
+import { useRouter, useDidShow, useShareAppMessage } from '@tarojs/taro'
+import { View, Text, Button } from '@tarojs/components'
 import { Navbar } from '@/components/navbar'
 import { Loading } from '@/components/loading'
 import { StateView } from '@/components/state-view'
@@ -59,6 +59,12 @@ export default function FamilyDetail() {
     load()
   })
 
+  // 邀请分享：接收方从分享卡进入本页后点「加入」走 joinHome(code)
+  useShareAppMessage(() => ({
+    title: `邀请你加入家庭圈「${family?.name ?? ''}」`,
+    path: `${ROUTES.FAMILY_DETAIL}?id=${familyId}&invite=1`
+  }))
+
   const addCared = () => {
     navigateTo(`${ROUTES.FAMILY_CONTACT_ADD}?familyId=${familyId}`)
   }
@@ -153,7 +159,16 @@ export default function FamilyDetail() {
         <View className={styles.section}>
           <ListRowGroup>
             <ListRow label="家庭编号" value={family.homeId} onClick={stub('复制成功（占位）')} arrow />
-            <ListRow label="邀请他人" arrow onClick={stub('邀请功能即将上线')} />
+            {/* open-type=share 触发右上角同款转发面板；Button 原生样式清除交由 shareBtn 样式接管 */}
+            <View className={styles.shareRow}>
+              <Text className={styles.shareLabel}>邀请他人</Text>
+              <Button
+                className={styles.shareBtn}
+                openType="share"
+              >
+                <Text className={styles.shareArrow}>›</Text>
+              </Button>
+            </View>
             <ListRow label="转让群主" arrow onClick={stub('转让功能即将上线')} />
             <ListRow label="修改群昵称" arrow onClick={stub('修改昵称功能即将上线')} />
           </ListRowGroup>