fix: third api

pages/avatar/index.vue

@@ -107,7 +107,7 @@
         :key="i"
         class="grid-item"
         :class="{ active: selectedDecor === decor }"
-        @tap="selectedDecor = decor"
+        @tap="toggleDecor(decor)"
       >
         <image :src="decor.imageUrl" class="grid-img" mode="aspectFit" />
         <view v-if="selectedDecor === decor" class="check">✔</view>
@@ -381,6 +381,14 @@ const toggleFrame = (frame) => {
   }
 };
 
+const toggleDecor = (decor) => {
+  if (selectedDecor.value === decor) {
+    selectedDecor.value = null;
+  } else {
+    selectedDecor.value = decor;
+  }
+};
+
 // 挂饰状态
 const decorState = ref({
   x: 300, // 初始中心 X (rpx)