fix bug

src/page/index/sidebar/sidebarItem.vue

@@ -6,7 +6,7 @@
       @click="open(item)"
       :key="item[labelKey]"
     >
-      <i :class="item[iconKey]"></i>
+      <i v-if="item[iconKey]" :class="item[iconKey]"></i>
       <template #title>
         <span :alt="item[pathKey]">{{ getTitle(item) }}</span>
       </template>
@@ -17,7 +17,7 @@
       :key="item[labelKey]"
     >
       <template #title>
-        <i :class="item[iconKey]"></i>
+        <i v-if="item[iconKey]" :class="item[iconKey]"></i>
         <span>{{ getTitle(item) }}</span>
       </template>
       <template v-for="(child, cindex) in item[childrenKey]" :key="child[labelKey]">
@@ -26,7 +26,7 @@
           @click="open(child)"
           v-if="validatenull(child[childrenKey])"
         >
-          <i :class="child[iconKey]"></i>
+          <i v-if="child[iconKey]" :class="child[iconKey]"></i>
           <template #title>
             <span>{{ getTitle(child) }}</span>
           </template>