fix(mini): 首页广告词与胶囊按钮精确垂直对齐

- 用Taro.getMenuButtonBoundingClientRect()获取胶囊按钮精确top
- paddingTop = menu.top，文字内容高度32px，文字中心 = menu.top + 16 = 胶囊中心
- 移除估算值statusBar+6，改为精确API获取
- 移除不再使用的getTopInset导入

miniprogram/src/pages/index/index.jsx

@@ -1,7 +1,6 @@
 import { View, Text, Button, ScrollView } from '@tarojs/components';
 import Taro from '@tarojs/taro';
 import { useTabIndex } from '@/utils/tab';
-import { getTopInset } from '@/components/TopInset';
 import {
   MK_HERO, MK_TRUST, MK_PRODUCTS,
   MK_CORE, MK_SIGNUP
@@ -11,8 +10,9 @@ import './index.scss';
 /* ---------- 首页宣传落地页 ---------- */
 export default function Index() {
   useTabIndex(2);
-  const { statusBar } = getTopInset();
-  const navPad = statusBar + 6; // 与右上角胶囊按钮top对齐
+  // 与右上角胶囊按钮垂直中心对齐
+  const menu = Taro.getMenuButtonBoundingClientRect ? Taro.getMenuButtonBoundingClientRect() : null;
+  const navPad = menu ? menu.top : 50; // 胶囊top即文字paddingTop，保证中心对齐
 
   const goTab = (url) => () => {
     if (/^\/pages-(extra|op)\//.test(url)) Taro.navigateTo({ url });