fix: API升级v5、错误提示优化、体重必填移除等

- selectMemberDrawer: v3→v5 API升级
- lefu/service: 统一错误提示文案
- equipmentMember: 修复删除确认弹框文案
- home: 优化加载中提示
- supplementPersonal: 移除体重必填校验

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

miniprogram/components/selectMemberDrawer/selectMemberDrawer.ts

@@ -150,7 +150,7 @@ Component({
           })
       } else {
         const sn = lefuService.deviceInfo?.serialNumber ?? ''
-        get<AddMemberApiItem[]>('weighingScale/v3/select/addMembers/user', { userId, sn }, { loading: false })
+        get<AddMemberApiItem[]>('weighingScale/v5/select/addMembers/user', { userId, sn }, { loading: false })
           .then((res: any) => {
             const members: ExistingMember[] = (res.result ?? []).map((item: AddMemberApiItem) => ({
               id: item.id,