fix: 修复收藏按钮布局并统一微信API调用方式

- 使用flex布局替代硬编码padding来居中收藏图标
- 将Taro API调用统一改为wx原生API调用

 <!--
  * @Date: 2025-06-28 10:33:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-04 16:51:27
+ * @LastEditTime: 2025-07-04 17:47:22
  * @FilePath: /jgdl/src/pages/index/index.vue
  * @Description: 捡个电驴首页
 -->
@@ -75,7 +75,7 @@
           <view class="relative p-2">
             <image :src="scooter.imageUrl" :alt="scooter.name" mode="aspectFill"
               class="w-full h-36 object-cover rounded-lg" />
-            <view class="absolute top-4 right-3 w-7 h-7 rounded-full bg-white bg-opacity-80" @tap.stop="() => toggleFavorite(scooter.id)" style="padding-top: 12rpx; padding-left: 10rpx;">
+            <view class="absolute top-4 right-3 w-7 h-7 rounded-full bg-white bg-opacity-80 flex items-center justify-center" @tap.stop="() => toggleFavorite(scooter.id)">
               <Heart1 v-if="!favoriteIds.includes(scooter.id)" size="22" :color="'#9ca3af'" />
               <HeartFill v-else size="22" :color="'#ef4444'" />
             </view>
@@ -342,8 +342,8 @@ useDidShow(() => {
 useReady(async () => {
   console.warn('index onReady')
   // 版本更新检查
-  if (!Taro.canIUse("getUpdateManager")) {
-    Taro.showModal({
+  if (!wx.canIUse("getUpdateManager")) {
+    wx.showModal({
       title: "提示",
       content: "当前微信版本过低，无法使用该功能，请升级到最新微信版本后重试",
       showCancel: false,
@@ -352,7 +352,7 @@ useReady(async () => {
   }
 
   // https://developers.weixin.qq.com/miniprogram/dev/api/base/update/UpdateManager.html
-  const updateManager = Taro.getUpdateManager();
+  const updateManager = wx.getUpdateManager();
 
   updateManager.onCheckForUpdate((res) => {
     // 请求完新版本信息的回调

@@ -97,7 +97,7 @@
                         <view class="relative p-2">
                             <image :src="scooter.imageUrl" :alt="scooter.name" mode="aspectFill"
                                 class="w-full h-36 object-cover rounded-lg" />
-                            <view class="absolute top-4 right-3 w-7 h-7 rounded-full bg-white bg-opacity-80" @tap.stop="() => toggleFavorite(scooter.id)" style="padding-top: 12rpx; padding-left: 10rpx;">
+                            <view class="absolute top-4 right-3 w-7 h-7 rounded-full bg-white bg-opacity-80 flex items-center justify-center" @tap.stop="() => toggleFavorite(scooter.id)">
                                 <Heart1 v-if="!favoriteIds.includes(scooter.id)" size="20" color="#9ca3af" />
                                 <HeartFill v-else size="20" color="#ef4444" />
                             </view>