[AI Generated]: feat(device): 配网/绑定后下发主用户到设备并兜底超时

- configWifi 加 20s 超时与 settled 互锁，避免回调不触发导致 loading 死转
- supplementPersonal 提交后、connectedWifi 二次配网确认后均下发主用户
- 设备成员唯一标识从 idCard 切换为 userId，清理 MemberDisplay.idCard

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

miniprogram/pages/connectedWifi/connectedWifi.ts

@@ -1,5 +1,25 @@
 import { lefuService } from '../../lefu/index'
-import type { LeFuWifiItem } from '../../lefu/index'
+import type { LeFuWifiItem, DeviceMember } from '../../lefu/index'
+
+/** 本地 userInfo 关键字段，用于下发主用户到新设备 */
+interface StoredUserInfo {
+    userId: string
+    realname: string
+    sex: number
+    height: number
+    birthday: string
+}
+
+/** 从生日字符串（YYYY-MM-DD）计算周岁 */
+const calcAge = (birthday: string): number => {
+    if (!birthday) return 0
+    const [y, m, d] = birthday.split('-').map(Number)
+    if (!y || !m || !d) return 0
+    const now = new Date()
+    let age = now.getFullYear() - y
+    if (now.getMonth() + 1 < m || (now.getMonth() + 1 === m && now.getDate() < d)) age -= 1
+    return Math.max(0, age)
+}
 
 interface WifiItem {
     ssid: string
@@ -126,6 +146,29 @@ Page({
 
     onConfirm() {
         if (!this.data.hasConnected) return
+        // 已有 userInfo 表示是从首页/设备页添加新设备，需把主用户下发到新设备后回首页
+        const userInfo = wx.getStorageSync('userInfo') as StoredUserInfo | null
+        if (userInfo) {
+            const mainUser: DeviceMember = {
+                id: userInfo.userId,
+                name: userInfo.realname,
+                gender: userInfo.sex === 1 ? 1 : 0,
+                age: calcAge(userInfo.birthday),
+                height: userInfo.height,
+                isSelf: true,
+            }
+            wx.showLoading({ title: '正在下发主用户...', mask: true })
+            lefuService.syncMembersToDevice([mainUser])
+                .then(() => {
+                    wx.hideLoading()
+                    wx.switchTab({ url: '/pages/home/home' })
+                })
+                .catch((err: Error) => {
+                    wx.hideLoading()
+                    wx.showToast({ title: err.message || '主用户下发失败', icon: 'none' })
+                })
+            return
+        }
         wx.navigateTo({ url: '/pages/supplementPersonal/supplementPersonal' })
     },
 })