refactor(tabbar): 将图标类型从'local'重命名为'image'并添加警告

修改图标类型命名以更准确描述其用途
在image模式下未配置iconActive时添加控制台警告

src/tabbar/index.vue

@@ -44,7 +44,11 @@ function getColorByIndex(index: number) {
   return tabbarStore.curIdx === index ? activeColor : inactiveColor
 }
 
-function getImageByIndex(index: number, item: { iconActive: string, icon: string }) {
+function getImageByIndex(index: number, item: { iconActive?: string, icon: string }) {
+  if (!item.iconActive) {
+    console.warn('image 模式下，需要配置 iconActive，否则无法切换图片')
+    return item.icon
+  }
   return tabbarStore.curIdx === index ? item.iconActive : item.icon
 }
 </script>
@@ -72,7 +76,7 @@ function getImageByIndex(index: number, item: { iconActive: string, icon: string
           <template v-if="item.iconType === 'unocss' || item.iconType === 'iconfont'">
             <view :class="item.icon" class="text-20px" />
           </template>
-          <template v-if="item.iconType === 'local'">
+          <template v-if="item.iconType === 'image'">
             <image :src="getImageByIndex(index, item)" mode="scaleToFill" class="h-20px w-20px" />
           </template>
           <view class="mt-2px text-12px">